@egjs/infinitegrid/dist/infinitegrid.js

/*
Copyright (c) 2015 NAVER Corp.
name: @egjs/infinitegrid
license: MIT
author: NAVER Corp.
repository: https://github.com/naver/egjs-infinitegrid
version: 4.1.0
*/
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global = global || self, global.InfiniteGrid = factory());
}(this, (function () { 'use strict';

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */

    /* global Reflect, Promise */
    var extendStatics = function (d, b) {
      extendStatics = Object.setPrototypeOf || {
        __proto__: []
      } instanceof Array && function (d, b) {
        d.__proto__ = b;
      } || function (d, b) {
        for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p];
      };

      return extendStatics(d, b);
    };

    function __extends(d, b) {
      if (typeof b !== "function" && b !== null) throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
      extendStatics(d, b);

      function __() {
        this.constructor = d;
      }

      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    }
    var __assign = function () {
      __assign = Object.assign || function __assign(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
          s = arguments[i];

          for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
        }

        return t;
      };

      return __assign.apply(this, arguments);
    };
    function __rest(s, e) {
      var t = {};

      for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0) t[p] = s[p];

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      }
      return t;
    }
    function __decorate(decorators, target, key, desc) {
      var c = arguments.length,
          r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc,
          d;
      if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
      return c > 3 && r && Object.defineProperty(target, key, r), r;
    }
    /** @deprecated */

    function __spreadArrays() {
      for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;

      for (var r = Array(s), k = 0, i = 0; i < il; i++) for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) r[k] = a[j];

      return r;
    }

    /*
    Copyright (c) NAVER Corp.
    name: @egjs/component
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-component
    version: 3.0.1
    */
    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */
    function __values(o) {
      var s = typeof Symbol === "function" && Symbol.iterator,
          m = s && o[s],
          i = 0;
      if (m) return m.call(o);
      if (o && typeof o.length === "number") return {
        next: function () {
          if (o && i >= o.length) o = void 0;
          return {
            value: o && o[i++],
            done: !o
          };
        }
      };
      throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
    }
    function __read(o, n) {
      var m = typeof Symbol === "function" && o[Symbol.iterator];
      if (!m) return o;
      var i = m.call(o),
          r,
          ar = [],
          e;

      try {
        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
      } catch (error) {
        e = {
          error: error
        };
      } finally {
        try {
          if (r && !r.done && (m = i["return"])) m.call(i);
        } finally {
          if (e) throw e.error;
        }
      }

      return ar;
    }
    function __spread() {
      for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));

      return ar;
    }

    /*
     * Copyright (c) 2015 NAVER Corp.
     * egjs projects are licensed under the MIT license
     */
    var isUndefined = function (value) {
      return typeof value === "undefined";
    };

    /**
     * Event class to provide additional properties
     * @ko Component에서 추가적인 프로퍼티를 제공하는 이벤트 클래스
     */

    var ComponentEvent =
    /*#__PURE__*/
    function () {
      /**
       * Create a new instance of ComponentEvent.
       * @ko ComponentEvent의 새로운 인스턴스를 생성한다.
       * @param eventType The name of the event.<ko>이벤트 이름.</ko>
       * @param props An object that contains additional event properties.<ko>추가적인 이벤트 프로퍼티 오브젝트.</ko>
       */
      function ComponentEvent(eventType, props) {
        var e_1, _a;

        this.eventType = eventType;
        this._canceled = false;
        if (!props) return;

        try {
          for (var _b = __values(Object.keys(props)), _c = _b.next(); !_c.done; _c = _b.next()) {
            var key = _c.value; // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment

            this[key] = props[key];
          }
        } catch (e_1_1) {
          e_1 = {
            error: e_1_1
          };
        } finally {
          try {
            if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
          } finally {
            if (e_1) throw e_1.error;
          }
        }
      }
      /**
       * Stop the event. {@link ComponentEvent#isCanceled} will return `true` after.
       * @ko 이벤트를 중단한다. 이후 {@link ComponentEvent#isCanceled}가 `true`를 반환한다.
       */


      var __proto = ComponentEvent.prototype;

      __proto.stop = function () {
        this._canceled = true;
      };
      /**
       * Returns a boolean value that indicates whether {@link ComponentEvent#stop} is called before.
       * @ko {@link ComponentEvent#stop}이 호출되었는지 여부를 반환한다.
       * @return {boolean} A boolean value that indicates whether {@link ComponentEvent#stop} is called before.<ko>이전에 {@link ComponentEvent#stop}이 불려졌는지 여부를 반환한다.</ko>
       */


      __proto.isCanceled = function () {
        return this._canceled;
      };

      return ComponentEvent;
    }();

    /**
     * A class used to manage events in a component
     * @ko 컴포넌트의 이벤트을 관리할 수 있게 하는 클래스
     */

    var Component =
    /*#__PURE__*/
    function () {
      /**
       * @support {"ie": "7+", "ch" : "latest", "ff" : "latest",  "sf" : "latest", "edge" : "latest", "ios" : "7+", "an" : "2.1+ (except 3.x)"}
       */
      function Component() {
        this._eventHandler = {};
      }
      /**
       * Trigger a custom event.
       * @ko 커스텀 이벤트를 발생시킨다
       * @param {string | ComponentEvent} event The name of the custom event to be triggered or an instance of the ComponentEvent<ko>발생할 커스텀 이벤트의 이름 또는 ComponentEvent의 인스턴스</ko>
       * @param {any[]} params Event data to be sent when triggering a custom event <ko>커스텀 이벤트가 발생할 때 전달할 데이터</ko>
       * @return An instance of the component itself<ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```ts
       * import Component, { ComponentEvent } from "@egjs/component";
       *
       * class Some extends Component<{
       *   beforeHi: ComponentEvent<{ foo: number; bar: string }>;
       *   hi: { foo: { a: number; b: boolean } };
       *   someEvent: (foo: number, bar: string) => void;
       *   someOtherEvent: void; // When there's no event argument
       * }> {
       *   some(){
       *     if(this.trigger("beforeHi")){ // When event call to stop return false.
       *       this.trigger("hi");// fire hi event.
       *     }
       *   }
       * }
       *
       * const some = new Some();
       * some.on("beforeHi", e => {
       *   if(condition){
       *     e.stop(); // When event call to stop, `hi` event not call.
       *   }
       *   // `currentTarget` is component instance.
       *   console.log(some === e.currentTarget); // true
       *
       *   typeof e.foo; // number
       *   typeof e.bar; // string
       * });
       * some.on("hi", e => {
       *   typeof e.foo.b; // boolean
       * });
       * // If you want to more know event design. You can see article.
       * // https://github.com/naver/egjs-component/wiki/How-to-make-Component-event-design%3F
       * ```
       */


      var __proto = Component.prototype;

      __proto.trigger = function (event) {
        var params = [];

        for (var _i = 1; _i < arguments.length; _i++) {
          params[_i - 1] = arguments[_i];
        }

        var eventName = event instanceof ComponentEvent ? event.eventType : event;

        var handlers = __spread(this._eventHandler[eventName] || []);

        if (handlers.length <= 0) {
          return this;
        }

        if (event instanceof ComponentEvent) {
          event.currentTarget = this;
          handlers.forEach(function (handler) {
            handler(event);
          });
        } else {
          handlers.forEach(function (handler) {
            // eslint-disable-next-line @typescript-eslint/no-unsafe-call
            handler.apply(void 0, __spread(params));
          });
        }

        return this;
      };
      /**
       * Executed event just one time.
       * @ko 이벤트가 한번만 실행된다.
       * @param {string} eventName The name of the event to be attached or an event name - event handler mapped object.<ko>등록할 이벤트의 이름 또는 이벤트 이름-핸들러 오브젝트</ko>
       * @param {function} handlerToAttach The handler function of the event to be attached <ko>등록할 이벤트의 핸들러 함수</ko>
       * @return An instance of the component itself<ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```ts
       * import Component, { ComponentEvent } from "@egjs/component";
       *
       * class Some extends Component<{
       *   hi: ComponentEvent;
       * }> {
       *   hi() {
       *     alert("hi");
       *   }
       *   thing() {
       *     this.once("hi", this.hi);
       *   }
       * }
       *
       * var some = new Some();
       * some.thing();
       * some.trigger(new ComponentEvent("hi"));
       * // fire alert("hi");
       * some.trigger(new ComponentEvent("hi"));
       * // Nothing happens
       * ```
       */


      __proto.once = function (eventName, handlerToAttach) {
        var _this = this;

        if (typeof eventName === "object" && isUndefined(handlerToAttach)) {
          var eventHash = eventName;

          for (var key in eventHash) {
            this.once(key, eventHash[key]);
          }

          return this;
        } else if (typeof eventName === "string" && typeof handlerToAttach === "function") {
          var listener_1 = function () {
            var args = [];

            for (var _i = 0; _i < arguments.length; _i++) {
              args[_i] = arguments[_i];
            } // eslint-disable-next-line @typescript-eslint/no-unsafe-call


            handlerToAttach.apply(void 0, __spread(args));

            _this.off(eventName, listener_1);
          };

          this.on(eventName, listener_1);
        }

        return this;
      };
      /**
       * Checks whether an event has been attached to a component.
       * @ko 컴포넌트에 이벤트가 등록됐는지 확인한다.
       * @param {string} eventName The name of the event to be attached <ko>등록 여부를 확인할 이벤트의 이름</ko>
       * @return {boolean} Indicates whether the event is attached. <ko>이벤트 등록 여부</ko>
       * @example
       * ```ts
       * import Component from "@egjs/component";
       *
       * class Some extends Component<{
       *   hi: void;
       * }> {
       *   some() {
       *     this.hasOn("hi");// check hi event.
       *   }
       * }
       * ```
       */


      __proto.hasOn = function (eventName) {
        return !!this._eventHandler[eventName];
      };
      /**
       * Attaches an event to a component.
       * @ko 컴포넌트에 이벤트를 등록한다.
       * @param {string} eventName The name of the event to be attached or an event name - event handler mapped object.<ko>등록할 이벤트의 이름 또는 이벤트 이름-핸들러 오브젝트</ko>
       * @param {function} handlerToAttach The handler function of the event to be attached <ko>등록할 이벤트의 핸들러 함수</ko>
       * @return An instance of a component itself<ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```ts
       * import Component, { ComponentEvent } from "@egjs/component";
       *
       * class Some extends Component<{
       *   hi: void;
       * }> {
       *   hi() {
       *     console.log("hi");
       *   }
       *   some() {
       *     this.on("hi",this.hi); //attach event
       *   }
       * }
       * ```
       */


      __proto.on = function (eventName, handlerToAttach) {
        if (typeof eventName === "object" && isUndefined(handlerToAttach)) {
          var eventHash = eventName;

          for (var name in eventHash) {
            this.on(name, eventHash[name]);
          }

          return this;
        } else if (typeof eventName === "string" && typeof handlerToAttach === "function") {
          var handlerList = this._eventHandler[eventName];

          if (isUndefined(handlerList)) {
            this._eventHandler[eventName] = [];
            handlerList = this._eventHandler[eventName];
          }

          handlerList.push(handlerToAttach);
        }

        return this;
      };
      /**
       * Detaches an event from the component.<br/>If the `eventName` is not given this will detach all event handlers attached.<br/>If the `handlerToDetach` is not given, this will detach all event handlers for `eventName`.
       * @ko 컴포넌트에 등록된 이벤트를 해제한다.<br/>`eventName`이 주어지지 않았을 경우 모든 이벤트 핸들러를 제거한다.<br/>`handlerToAttach`가 주어지지 않았을 경우 `eventName`에 해당하는 모든 이벤트 핸들러를 제거한다.
       * @param {string?} eventName The name of the event to be detached <ko>해제할 이벤트의 이름</ko>
       * @param {function?} handlerToDetach The handler function of the event to be detached <ko>해제할 이벤트의 핸들러 함수</ko>
       * @return An instance of a component itself <ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```ts
       * import Component, { ComponentEvent } from "@egjs/component";
       *
       * class Some extends Component<{
       *   hi: void;
       * }> {
       *   hi() {
       *     console.log("hi");
       *   }
       *   some() {
       *     this.off("hi",this.hi); //detach event
       *   }
       * }
       * ```
       */


      __proto.off = function (eventName, handlerToDetach) {
        var e_1, _a; // Detach all event handlers.


        if (isUndefined(eventName)) {
          this._eventHandler = {};
          return this;
        } // Detach all handlers for eventname or detach event handlers by object.


        if (isUndefined(handlerToDetach)) {
          if (typeof eventName === "string") {
            delete this._eventHandler[eventName];
            return this;
          } else {
            var eventHash = eventName;

            for (var name in eventHash) {
              this.off(name, eventHash[name]);
            }

            return this;
          }
        } // Detach single event handler


        var handlerList = this._eventHandler[eventName];

        if (handlerList) {
          var idx = 0;

          try {
            for (var handlerList_1 = __values(handlerList), handlerList_1_1 = handlerList_1.next(); !handlerList_1_1.done; handlerList_1_1 = handlerList_1.next()) {
              var handlerFunction = handlerList_1_1.value;

              if (handlerFunction === handlerToDetach) {
                handlerList.splice(idx, 1);

                if (handlerList.length <= 0) {
                  delete this._eventHandler[eventName];
                }

                break;
              }

              idx++;
            }
          } catch (e_1_1) {
            e_1 = {
              error: e_1_1
            };
          } finally {
            try {
              if (handlerList_1_1 && !handlerList_1_1.done && (_a = handlerList_1.return)) _a.call(handlerList_1);
            } finally {
              if (e_1) throw e_1.error;
            }
          }
        }

        return this;
      };
      /**
       * Version info string
       * @ko 버전정보 문자열
       * @name VERSION
       * @static
       * @example
       * Component.VERSION;  // ex) 3.0.0
       * @memberof Component
       */


      Component.VERSION = "3.0.1";
      return Component;
    }();

    /*
     * Copyright (c) 2015 NAVER Corp.
     * egjs projects are licensed under the MIT license
     */

    var ComponentEvent$1 = ComponentEvent;

    /*
    Copyright (c) NAVER Corp.
    name: @egjs/component
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-component
    version: 2.2.2
    */
    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */
    function __values$1(o) {
      var s = typeof Symbol === "function" && Symbol.iterator,
          m = s && o[s],
          i = 0;
      if (m) return m.call(o);
      if (o && typeof o.length === "number") return {
        next: function () {
          if (o && i >= o.length) o = void 0;
          return {
            value: o && o[i++],
            done: !o
          };
        }
      };
      throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
    }

    /*
     * Copyright (c) 2015 NAVER Corp.
     * egjs projects are licensed under the MIT license
     */

    function isUndefined$1(value) {
      return typeof value === "undefined";
    }
    /**
     * A class used to manage events in a component
     * @ko 컴포넌트의 이벤트을 관리할 수 있게 하는 클래스
     * @alias eg.Component
     */


    var Component$1 =
    /*#__PURE__*/
    function () {
      /**
       * @support {"ie": "7+", "ch" : "latest", "ff" : "latest",  "sf" : "latest", "edge" : "latest", "ios" : "7+", "an" : "2.1+ (except 3.x)"}
       */
      function Component() {
        /**
         * @deprecated
         * @private
         */
        this.options = {};
        this._eventHandler = {};
      }
      /**
       * Triggers a custom event.
       * @ko 커스텀 이벤트를 발생시킨다
       * @param {string} eventName The name of the custom event to be triggered <ko>발생할 커스텀 이벤트의 이름</ko>
       * @param {object} customEvent Event data to be sent when triggering a custom event <ko>커스텀 이벤트가 발생할 때 전달할 데이터</ko>
       * @param {any[]} restParam Additional parameters when triggering a custom event <ko>커스텀 이벤트가 발생할 때 필요시 추가적으로 전달할 데이터</ko>
       * @return Indicates whether the event has occurred. If the stop() method is called by a custom event handler, it will return false and prevent the event from occurring. <a href="https://github.com/naver/egjs-component/wiki/How-to-make-Component-event-design%3F">Ref</a> <ko>이벤트 발생 여부. 커스텀 이벤트 핸들러에서 stop() 메서드를 호출하면 'false'를 반환하고 이벤트 발생을 중단한다. <a href="https://github.com/naver/egjs-component/wiki/How-to-make-Component-event-design%3F">참고</a></ko>
       * @example
       * ```
       * class Some extends eg.Component {
       *   some(){
       *     if(this.trigger("beforeHi")){ // When event call to stop return false.
       *       this.trigger("hi");// fire hi event.
       *     }
       *   }
       * }
       *
       * const some = new Some();
       * some.on("beforeHi", (e) => {
       *   if(condition){
       *     e.stop(); // When event call to stop, `hi` event not call.
       *   }
       * });
       * some.on("hi", (e) => {
       *   // `currentTarget` is component instance.
       *   console.log(some === e.currentTarget); // true
       * });
       * // If you want to more know event design. You can see article.
       * // https://github.com/naver/egjs-component/wiki/How-to-make-Component-event-design%3F
       * ```
       */


      var __proto = Component.prototype;

      __proto.trigger = function (eventName) {
        var _this = this;

        var params = [];

        for (var _i = 1; _i < arguments.length; _i++) {
          params[_i - 1] = arguments[_i];
        }

        var handlerList = this._eventHandler[eventName] || [];
        var hasHandlerList = handlerList.length > 0;

        if (!hasHandlerList) {
          return true;
        }

        var customEvent = params[0] || {};
        var restParams = params.slice(1); // If detach method call in handler in first time then handler list calls.

        handlerList = handlerList.concat();
        var isCanceled = false; // This should be done like this to pass previous tests

        customEvent.eventType = eventName;

        customEvent.stop = function () {
          isCanceled = true;
        };

        customEvent.currentTarget = this;
        var arg = [customEvent];

        if (restParams.length >= 1) {
          arg = arg.concat(restParams);
        }

        handlerList.forEach(function (handler) {
          handler.apply(_this, arg);
        });
        return !isCanceled;
      };
      /**
       * Executed event just one time.
       * @ko 이벤트가 한번만 실행된다.
       * @param {string} eventName The name of the event to be attached <ko>등록할 이벤트의 이름</ko>
       * @param {function} handlerToAttach The handler function of the event to be attached <ko>등록할 이벤트의 핸들러 함수</ko>
       * @return An instance of a component itself<ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```
       * class Some extends eg.Component {
       * hi() {
       *   alert("hi");
       * }
       * thing() {
       *   this.once("hi", this.hi);
       * }
       *
       * var some = new Some();
       * some.thing();
       * some.trigger("hi");
       * // fire alert("hi");
       * some.trigger("hi");
       * // Nothing happens
       * ```
       */


      __proto.once = function (eventName, handlerToAttach) {
        var _this = this;

        if (typeof eventName === "object" && isUndefined$1(handlerToAttach)) {
          var eventHash = eventName;

          for (var key in eventHash) {
            this.once(key, eventHash[key]);
          }

          return this;
        } else if (typeof eventName === "string" && typeof handlerToAttach === "function") {
          var listener_1 = function () {
            var args = [];

            for (var _i = 0; _i < arguments.length; _i++) {
              args[_i] = arguments[_i];
            }

            handlerToAttach.apply(_this, args);

            _this.off(eventName, listener_1);
          };

          this.on(eventName, listener_1);
        }

        return this;
      };
      /**
       * Checks whether an event has been attached to a component.
       * @ko 컴포넌트에 이벤트가 등록됐는지 확인한다.
       * @param {string} eventName The name of the event to be attached <ko>등록 여부를 확인할 이벤트의 이름</ko>
       * @return {boolean} Indicates whether the event is attached. <ko>이벤트 등록 여부</ko>
       * @example
       * ```
       * class Some extends eg.Component {
       *   some() {
       *     this.hasOn("hi");// check hi event.
       *   }
       * }
       * ```
       */


      __proto.hasOn = function (eventName) {
        return !!this._eventHandler[eventName];
      };
      /**
       * Attaches an event to a component.
       * @ko 컴포넌트에 이벤트를 등록한다.
       * @param {string} eventName The name of the event to be attached <ko>등록할 이벤트의 이름</ko>
       * @param {function} handlerToAttach The handler function of the event to be attached <ko>등록할 이벤트의 핸들러 함수</ko>
       * @return An instance of a component itself<ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```
       * class Some extends eg.Component {
       *   hi() {
       *     console.log("hi");
       *   }
       *   some() {
       *     this.on("hi",this.hi); //attach event
       *   }
       * }
       * ```
       */


      __proto.on = function (eventName, handlerToAttach) {
        if (typeof eventName === "object" && isUndefined$1(handlerToAttach)) {
          var eventHash = eventName;

          for (var name in eventHash) {
            this.on(name, eventHash[name]);
          }

          return this;
        } else if (typeof eventName === "string" && typeof handlerToAttach === "function") {
          var handlerList = this._eventHandler[eventName];

          if (isUndefined$1(handlerList)) {
            this._eventHandler[eventName] = [];
            handlerList = this._eventHandler[eventName];
          }

          handlerList.push(handlerToAttach);
        }

        return this;
      };
      /**
       * Detaches an event from the component.
       * @ko 컴포넌트에 등록된 이벤트를 해제한다
       * @param {string} eventName The name of the event to be detached <ko>해제할 이벤트의 이름</ko>
       * @param {function} handlerToDetach The handler function of the event to be detached <ko>해제할 이벤트의 핸들러 함수</ko>
       * @return An instance of a component itself <ko>컴포넌트 자신의 인스턴스</ko>
       * @example
       * ```
       * class Some extends eg.Component {
       *   hi() {
       *     console.log("hi");
       *   }
       *   some() {
       *     this.off("hi",this.hi); //detach event
       *   }
       * }
       * ```
       */


      __proto.off = function (eventName, handlerToDetach) {
        var e_1, _a; // Detach all event handlers.


        if (isUndefined$1(eventName)) {
          this._eventHandler = {};
          return this;
        } // Detach all handlers for eventname or detach event handlers by object.


        if (isUndefined$1(handlerToDetach)) {
          if (typeof eventName === "string") {
            delete this._eventHandler[eventName];
            return this;
          } else {
            var eventHash = eventName;

            for (var name in eventHash) {
              this.off(name, eventHash[name]);
            }

            return this;
          }
        } // Detach single event handler


        var handlerList = this._eventHandler[eventName];

        if (handlerList) {
          var idx = 0;

          try {
            for (var handlerList_1 = __values$1(handlerList), handlerList_1_1 = handlerList_1.next(); !handlerList_1_1.done; handlerList_1_1 = handlerList_1.next()) {
              var handlerFunction = handlerList_1_1.value;

              if (handlerFunction === handlerToDetach) {
                handlerList.splice(idx, 1);
                break;
              }

              idx++;
            }
          } catch (e_1_1) {
            e_1 = {
              error: e_1_1
            };
          } finally {
            try {
              if (handlerList_1_1 && !handlerList_1_1.done && (_a = handlerList_1.return)) _a.call(handlerList_1);
            } finally {
              if (e_1) throw e_1.error;
            }
          }
        }

        return this;
      };
      /**
       * Version info string
       * @ko 버전정보 문자열
       * @name VERSION
       * @static
       * @example
       * eg.Component.VERSION;  // ex) 2.0.0
       * @memberof eg.Component
       */


      Component.VERSION = "2.2.2";
      return Component;
    }();

    /*
    Copyright (c) 2020-present NAVER Corp.
    name: @egjs/imready
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-imready
    version: 1.1.4
    */

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */

    /* global Reflect, Promise */
    var extendStatics$1 = function (d, b) {
      extendStatics$1 = Object.setPrototypeOf || {
        __proto__: []
      } instanceof Array && function (d, b) {
        d.__proto__ = b;
      } || function (d, b) {
        for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p];
      };

      return extendStatics$1(d, b);
    };

    function __extends$1(d, b) {
      extendStatics$1(d, b);

      function __() {
        this.constructor = d;
      }

      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    }
    var __assign$1 = function () {
      __assign$1 = Object.assign || function __assign(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
          s = arguments[i];

          for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
        }

        return t;
      };

      return __assign$1.apply(this, arguments);
    };
    function __spreadArrays$1() {
      for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;

      for (var r = Array(s), k = 0, i = 0; i < il; i++) for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) r[k] = a[j];

      return r;
    }

    /*
    egjs-imready
    Copyright (c) 2020-present NAVER Corp.
    MIT license
    */
    var isWindow = typeof window !== "undefined";
    var ua = isWindow ? window.navigator.userAgent : "";
    var SUPPORT_COMPUTEDSTYLE = isWindow ? !!("getComputedStyle" in window) : false;
    var IS_IE = /MSIE|Trident|Windows Phone|Edge/.test(ua);
    var SUPPORT_ADDEVENTLISTENER = isWindow ? !!("addEventListener" in document) : false;
    var WIDTH = "width";
    var HEIGHT = "height";

    function getAttribute(el, name) {
      return el.getAttribute(name) || "";
    }
    function toArray(arr) {
      return [].slice.call(arr);
    }
    function hasSizeAttribute(target, prefix) {
      if (prefix === void 0) {
        prefix = "data-";
      }

      return !!target.getAttribute(prefix + "width");
    }
    function hasLoadingAttribute(target) {
      return "loading" in target && target.getAttribute("loading") === "lazy";
    }
    function hasSkipAttribute(target, prefix) {
      if (prefix === void 0) {
        prefix = "data-";
      }

      return !!target.getAttribute(prefix + "skip");
    }
    function addEvent(element, type, handler) {
      if (SUPPORT_ADDEVENTLISTENER) {
        element.addEventListener(type, handler, false);
      } else if (element.attachEvent) {
        element.attachEvent("on" + type, handler);
      } else {
        element["on" + type] = handler;
      }
    }
    function removeEvent(element, type, handler) {
      if (element.removeEventListener) {
        element.removeEventListener(type, handler, false);
      } else if (element.detachEvent) {
        element.detachEvent("on" + type, handler);
      } else {
        element["on" + type] = null;
      }
    }
    function innerWidth(el) {
      return getSize(el, "Width");
    }
    function innerHeight(el) {
      return getSize(el, "Height");
    }
    function getStyles(el) {
      return (SUPPORT_COMPUTEDSTYLE ? window.getComputedStyle(el) : el.currentStyle) || {};
    }

    function getSize(el, name) {
      var size = el["client" + name] || el["offset" + name];
      return parseFloat(size || getStyles(el)[name.toLowerCase()]) || 0;
    }

    function getContentElements(element, tags, prefix) {
      var skipElements = toArray(element.querySelectorAll(__spreadArrays$1(["[" + prefix + "skip] [" + prefix + "width]"], tags.map(function (tag) {
        return ["[" + prefix + "skip] " + tag, tag + "[" + prefix + "skip]", "[" + prefix + "width] " + tag].join(", ");
      })).join(", ")));
      return toArray(element.querySelectorAll("[" + prefix + "width], " + tags.join(", "))).filter(function (el) {
        return skipElements.indexOf(el) === -1;
      });
    }

    /*
    egjs-imready
    Copyright (c) 2020-present NAVER Corp.
    MIT license
    */
    var elements = [];
    function addAutoSizer(element, prefix) {
      !elements.length && addEvent(window, "resize", resizeAllAutoSizers);
      element.__PREFIX__ = prefix;
      elements.push(element);
      resize(element);
    }
    function removeAutoSizer(element, prefix) {
      var index = elements.indexOf(element);

      if (index < 0) {
        return;
      }

      var fixed = getAttribute(element, prefix + "fixed");
      delete element.__PREFIX__;
      element.style[fixed === HEIGHT ? WIDTH : HEIGHT] = "";
      elements.splice(index, 1);
      !elements.length && removeEvent(window, "resize", resizeAllAutoSizers);
    }

    function resize(element, prefix) {
      if (prefix === void 0) {
        prefix = "data-";
      }

      var elementPrefix = element.__PREFIX__ || prefix;
      var dataWidth = parseInt(getAttribute(element, "" + elementPrefix + WIDTH), 10) || 0;
      var dataHeight = parseInt(getAttribute(element, "" + elementPrefix + HEIGHT), 10) || 0;
      var fixed = getAttribute(element, elementPrefix + "fixed");

      if (fixed === HEIGHT) {
        var size = innerHeight(element) || dataHeight;
        element.style[WIDTH] = dataWidth / dataHeight * size + "px";
      } else {
        var size = innerWidth(element) || dataWidth;
        element.style[HEIGHT] = dataHeight / dataWidth * size + "px";
      }
    }

    function resizeAllAutoSizers() {
      elements.forEach(function (element) {
        resize(element);
      });
    }

    var Loader =
    /*#__PURE__*/
    function (_super) {
      __extends$1(Loader, _super);

      function Loader(element, options) {
        if (options === void 0) {
          options = {};
        }

        var _this = _super.call(this) || this;

        _this.isReady = false;
        _this.isPreReady = false;
        _this.hasDataSize = false;
        _this.hasLoading = false;
        _this.isSkip = false;

        _this.onCheck = function (e) {
          _this.clear();

          if (e && e.type === "error") {
            _this.onError(_this.element);
          } // I'm pre-ready and ready!


          var withPreReady = !_this.hasDataSize && !_this.hasLoading;

          _this.onReady(withPreReady);
        };

        _this.options = __assign$1({
          prefix: "data-"
        }, options);
        _this.element = element;
        var prefix = _this.options.prefix;
        _this.hasDataSize = hasSizeAttribute(element, prefix);
        _this.isSkip = hasSkipAttribute(element, prefix);
        _this.hasLoading = hasLoadingAttribute(element);
        return _this;
      }

      var __proto = Loader.prototype;

      __proto.check = function () {
        if (this.isSkip || !this.checkElement()) {
          // I'm Ready
          this.onAlreadyReady(true);
          return false;
        }

        if (this.hasDataSize) {
          addAutoSizer(this.element, this.options.prefix);
        }

        if (this.hasDataSize || this.hasLoading) {
          // I'm Pre Ready
          this.onAlreadyPreReady();
        } // Wati Pre Ready, Ready


        return true;
      };

      __proto.addEvents = function () {
        var _this = this;

        var element = this.element;
        this.constructor.EVENTS.forEach(function (name) {
          addEvent(element, name, _this.onCheck);
        });
      };

      __proto.clear = function () {
        var _this = this;

        var element = this.element;
        this.constructor.EVENTS.forEach(function (name) {
          removeEvent(element, name, _this.onCheck);
        });
        this.removeAutoSizer();
      };

      __proto.destroy = function () {
        this.clear();
        this.off();
      };

      __proto.removeAutoSizer = function () {
        if (this.hasDataSize) {
          // I'm already ready.
          var prefix = this.options.prefix;
          removeAutoSizer(this.element, prefix);
        }
      };

      __proto.onError = function (target) {
        this.trigger("error", {
          element: this.element,
          target: target
        });
      };

      __proto.onPreReady = function () {
        if (this.isPreReady) {
          return;
        }

        this.isPreReady = true;
        this.trigger("preReady", {
          element: this.element,
          hasLoading: this.hasLoading,
          isSkip: this.isSkip
        });
      };

      __proto.onReady = function (withPreReady) {
        if (this.isReady) {
          return;
        }

        withPreReady = !this.isPreReady && withPreReady;

        if (withPreReady) {
          this.isPreReady = true;
        }

        this.removeAutoSizer();
        this.isReady = true;
        this.trigger("ready", {
          element: this.element,
          withPreReady: withPreReady,
          hasLoading: this.hasLoading,
          isSkip: this.isSkip
        });
      };

      __proto.onAlreadyError = function (target) {
        var _this = this;

        setTimeout(function () {
          _this.onError(target);
        });
      };

      __proto.onAlreadyPreReady = function () {
        var _this = this;

        setTimeout(function () {
          _this.onPreReady();
        });
      };

      __proto.onAlreadyReady = function (withPreReady) {
        var _this = this;

        setTimeout(function () {
          _this.onReady(withPreReady);
        });
      };

      Loader.EVENTS = [];
      return Loader;
    }(Component$1);

    var ElementLoader =
    /*#__PURE__*/
    function (_super) {
      __extends$1(ElementLoader, _super);

      function ElementLoader() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = ElementLoader.prototype;

      __proto.setHasLoading = function (hasLoading) {
        this.hasLoading = hasLoading;
      };

      __proto.check = function () {
        if (this.isSkip) {
          // I'm Ready
          this.onAlreadyReady(true);
          return false;
        }

        if (this.hasDataSize) {
          addAutoSizer(this.element, this.options.prefix);
          this.onAlreadyPreReady();
        } else {
          // has not data size
          this.trigger("requestChildren");
        }

        return true;
      };

      __proto.checkElement = function () {
        return true;
      };

      __proto.destroy = function () {
        this.clear();
        this.trigger("requestDestroy");
        this.off();
      };

      __proto.onAlreadyPreReady = function () {
        // has data size
        _super.prototype.onAlreadyPreReady.call(this);

        this.trigger("reqeustReadyChildren");
      };

      ElementLoader.EVENTS = [];
      return ElementLoader;
    }(Loader);

    /**
     * @alias eg.ImReady
     * @extends eg.Component
     */

    var ImReadyManager =
    /*#__PURE__*/
    function (_super) {
      __extends$1(ImReadyManager, _super);
      /**
       * @param - ImReady's options
       */


      function ImReadyManager(options) {
        if (options === void 0) {
          options = {};
        }

        var _this = _super.call(this) || this;

        _this.readyCount = 0;
        _this.preReadyCount = 0;
        _this.totalCount = 0;
        _this.totalErrorCount = 0;
        _this.isPreReadyOver = true;
        _this.elementInfos = [];
        _this.options = __assign$1({
          loaders: {},
          prefix: "data-"
        }, options);
        return _this;
      }
      /**
       * Checks whether elements are in the ready state.
       * @ko 엘리먼트가 준비 상태인지 체크한다.
       * @elements - Elements to check ready status. <ko> 준비 상태를 체크할 엘리먼트들.</ko>
       * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg" data-width="1280" data-height="853"/>
         *    <img src="ERR" data-width="1280" data-height="853"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check(document.querySelectorAll("img")).on({
         *   preReadyElement: e => {
         *     // 1, 3
         *     // 2, 3
         *     // 3, 3
         *     console.log(e.preReadyCount, e.totalCount),
         *   },
         * });
         * ```
       */


      var __proto = ImReadyManager.prototype;

      __proto.check = function (elements) {
        var _this = this;

        var prefix = this.options.prefix;
        this.clear();
        this.elementInfos = toArray(elements).map(function (element, index) {
          var loader = _this.getLoader(element, {
            prefix: prefix
          });

          loader.check();
          loader.on("error", function (e) {
            _this.onError(index, e.target);
          }).on("preReady", function (e) {
            var info = _this.elementInfos[index];
            info.hasLoading = e.hasLoading;
            info.isSkip = e.isSkip;

            var isPreReady = _this.checkPreReady(index);

            _this.onPreReadyElement(index);

            isPreReady && _this.onPreReady();
          }).on("ready", function (_a) {
            var withPreReady = _a.withPreReady,
                hasLoading = _a.hasLoading,
                isSkip = _a.isSkip;
            var info = _this.elementInfos[index];
            info.hasLoading = hasLoading;
            info.isSkip = isSkip;

            var isPreReady = withPreReady && _this.checkPreReady(index);

            var isReady = _this.checkReady(index); // Pre-ready and ready occur simultaneously


            withPreReady && _this.onPreReadyElement(index);

            _this.onReadyElement(index);

            isPreReady && _this.onPreReady();
            isReady && _this.onReady();
          });
          return {
            loader: loader,
            element: element,
            hasLoading: false,
            hasError: false,
            isPreReady: false,
            isReady: false,
            isSkip: false
          };
        });
        var length = this.elementInfos.length;
        this.totalCount = length;

        if (!length) {
          setTimeout(function () {
            _this.onPreReady();

            _this.onReady();
          });
        }

        return this;
      };
      /**
       * Gets the total count of elements to be checked.
       * @ko 체크하는 element의 총 개수를 가져온다.
       */


      __proto.getTotalCount = function () {
        return this.totalCount;
      };
      /**
       * Whether the elements are all pre-ready. (all sizes are known)
       * @ko 엘리먼트들이 모두 사전 준비가 됐는지 (사이즈를 전부 알 수 있는지) 여부.
       */


      __proto.isPreReady = function () {
        return this.elementInfos.every(function (info) {
          return info.isPreReady;
        });
      };
      /**
       * Whether the elements are all ready.
       * @ko 엘리먼트들이 모두 준비가 됐는지 여부.
       */


      __proto.isReady = function () {
        return this.elementInfos.every(function (info) {
          return info.isReady;
        });
      };
      /**
       * Whether an error has occurred in the elements in the current state.
       * @ko 현재 상태에서 엘리먼트들이 에러가 발생했는지 여부.
       */


      __proto.hasError = function () {
        return this.totalErrorCount > 0;
      };
      /**
       * Clears events of elements being checked.
       * @ko 체크 중인 엘리먼트들의 이벤트를 해제 한다.
       */


      __proto.clear = function () {
        this.isPreReadyOver = false;
        this.totalCount = 0;
        this.preReadyCount = 0;
        this.readyCount = 0;
        this.totalErrorCount = 0;
        this.elementInfos.forEach(function (info) {
          if (!info.isReady && info.loader) {
            info.loader.destroy();
          }
        });
        this.elementInfos = [];
      };
      /**
       * Destory all events.
       * @ko 모든 이벤트를 해제 한다.
       */


      __proto.destroy = function () {
        this.clear();
        this.off();
      };

      __proto.getLoader = function (element, options) {
        var _this = this;

        var tagName = element.tagName.toLowerCase();
        var loaders = this.options.loaders;
        var tags = Object.keys(loaders);

        if (loaders[tagName]) {
          return new loaders[tagName](element, options);
        }

        var loader = new ElementLoader(element, options);
        var children = toArray(element.querySelectorAll(tags.join(", ")));
        loader.setHasLoading(children.some(function (el) {
          return hasLoadingAttribute(el);
        }));
        var withPreReady = false;
        var childrenImReady = this.clone().on("error", function (e) {
          loader.onError(e.target);
        }).on("ready", function () {
          loader.onReady(withPreReady);
        });
        loader.on("requestChildren", function () {
          // has not data size
          var contentElements = getContentElements(element, tags, _this.options.prefix);
          childrenImReady.check(contentElements).on("preReady", function (e) {
            withPreReady = e.isReady;

            if (!withPreReady) {
              loader.onPreReady();
            }
          });
        }).on("reqeustReadyChildren", function () {
          // has data size
          // loader call preReady
          // check only video, image elements
          childrenImReady.check(children);
        }).on("requestDestroy", function () {
          childrenImReady.destroy();
        });
        return loader;
      };

      __proto.clone = function () {
        return new ImReadyManager(__assign$1({}, this.options));
      };

      __proto.checkPreReady = function (index) {
        this.elementInfos[index].isPreReady = true;
        ++this.preReadyCount;

        if (this.preReadyCount < this.totalCount) {
          return false;
        }

        return true;
      };

      __proto.checkReady = function (index) {
        this.elementInfos[index].isReady = true;
        ++this.readyCount;

        if (this.readyCount < this.totalCount) {
          return false;
        }

        return true;
      };

      __proto.onError = function (index, target) {
        var info = this.elementInfos[index];
        info.hasError = true;
        /**
         * An event occurs if the image, video fails to load.
         * @ko 이미지, 비디오가 로딩에 실패하면 이벤트가 발생한다.
         * @event eg.ImReady#error
         * @param {eg.ImReady.OnError} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @param {HTMLElement} [e.element] - The element with error images.<ko>오류난 이미지가 있는 엘리먼트</ko>
         * @param {number} [e.index] - The item's index with error images. <ko>오류난 이미지가 있는 엘리먼트의 인덱스</ko>
         * @param {HTMLElement} [e.target] - Error image target in element <ko>엘리먼트의 오류난 이미지 타겟</ko>
         * @param {number} [e.errorCount] - The number of elements with errors <ko>에러가 있는 엘리먼트들의 개수</ko>
         * @param {number} [e.totalErrorCount] - The total number of targets with errors <ko>에러가 있는 타겟들의 총 개수</ko>
         * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg"/>
         *    <img src="ERR"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check([document.querySelector("div")]).on({
         *   error: e => {
         *     // <div>...</div>, 0, <img src="ERR"/>
         *     console.log(e.element, e.index, e.target),
         *   },
         * });
         * ```
         */

        this.trigger("error", {
          element: info.element,
          index: index,
          target: target,
          errorCount: this.getErrorCount(),
          totalErrorCount: ++this.totalErrorCount
        });
      };

      __proto.onPreReadyElement = function (index) {
        var info = this.elementInfos[index];
        /**
         * An event occurs when the element is pre-ready (when the loading attribute is applied or the size is known)
         * @ko 해당 엘리먼트가 사전 준비되었을 때(loading 속성이 적용되었거나 사이즈를 알 수 있을 때) 이벤트가 발생한다.
         * @event eg.ImReady#preReadyElement
         * @param {eg.ImReady.OnPreReadyElement} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @param {HTMLElement} [e.element] - The pre-ready element.<ko>사전 준비된 엘리먼트</ko>
         * @param {number} [e.index] - The index of the pre-ready element. <ko>사전 준비된 엘리먼트의 인덱스</ko>
         * @param {number} [e.preReadyCount] - Number of elements pre-ready <ko>사전 준비된 엘리먼트들의 개수</ko>
         * @param {number} [e.readyCount] - Number of elements ready <ko>준비된 엘리먼트들의 개수</ko>
         * @param {number} [e.totalCount] - Total number of elements <ko>엘리먼트들의 총 개수</ko>
         * @param {boolean} [e.isPreReady] - Whether all elements are pre-ready <ko>모든 엘리먼트가 사전 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.isReady] - Whether all elements are ready <ko>모든 엘리먼트가 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.hasLoading] - Whether the loading attribute has been applied <ko>loading 속성이 적용되었는지 여부</ko>
         * @param {boolean} [e.isSkip] - Whether the check is omitted due to skip attribute <ko>skip 속성으로 인하여 체크가 생략됐는지 여부</ko>
         * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg" data-width="1280" data-height="853"/>
         *    <img src="ERR" data-width="1280" data-height="853"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check(document.querySelectorAll("img")).on({
         *   preReadyElement: e => {
         *     // 1, 3
         *     // 2, 3
         *     // 3, 3
         *     console.log(e.preReadyCount, e.totalCount),
         *   },
         * });
         * ```
         */

        this.trigger("preReadyElement", {
          element: info.element,
          index: index,
          preReadyCount: this.preReadyCount,
          readyCount: this.readyCount,
          totalCount: this.totalCount,
          isPreReady: this.isPreReady(),
          isReady: this.isReady(),
          hasLoading: info.hasLoading,
          isSkip: info.isSkip
        });
      };

      __proto.onPreReady = function () {
        this.isPreReadyOver = true;
        /**
         * An event occurs when all element are pre-ready (When all elements have the loading attribute applied or the size is known)
         * @ko 모든 엘리먼트들이 사전 준비된 경우 (모든 엘리먼트들이 loading 속성이 적용되었거나 사이즈를 알 수 있는 경우) 이벤트가 발생한다.
         * @event eg.ImReady#preReady
         * @param {eg.ImReady.OnPreReady} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @param {number} [e.readyCount] - Number of elements ready <ko>준비된 엘리먼트들의 개수</ko>
         * @param {number} [e.totalCount] - Total number of elements <ko>엘리먼트들의 총 개수</ko>
         * @param {boolean} [e.isReady] - Whether all elements are ready <ko>모든 엘리먼트가 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.hasLoading] - Whether the loading attribute has been applied <ko>loading 속성이 적용되었는지 여부</ko>
         * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg" data-width="1280" data-height="853"/>
         *    <img src="ERR" data-width="1280" data-height="853"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check(document.querySelectorAll("img")).on({
         *   preReady: e => {
         *     // 0, 3
         *     console.log(e.readyCount, e.totalCount),
         *   },
         * });
         * ```
         */

        this.trigger("preReady", {
          readyCount: this.readyCount,
          totalCount: this.totalCount,
          isReady: this.isReady(),
          hasLoading: this.hasLoading()
        });
      };

      __proto.onReadyElement = function (index) {
        var info = this.elementInfos[index];
        /**
         * An event occurs when the element is ready
         * @ko 해당 엘리먼트가 준비가 되었을 때 이벤트가 발생한다.
         * @event eg.ImReady#readyElement
         * @param {eg.ImReady.OnReadyElement} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @param {HTMLElement} [e.element] - The ready element.<ko>준비된 엘리먼트</ko>
         * @param {number} [e.index] - The index of the ready element. <ko>준비된 엘리먼트의 인덱스</ko>
         * @param {boolean} [e.hasError] - Whether there is an error in the element <ko>해당 엘리먼트에 에러가 있는지 여부</ko>
         * @param {number} [e.errorCount] - The number of elements with errors <ko>에러가 있는 엘리먼트들의 개수</ko>
         * @param {number} [e.totalErrorCount] - The total number of targets with errors <ko>에러가 있는 타겟들의 총 개수</ko>
         * @param {number} [e.preReadyCount] - Number of elements pre-ready <ko>사전 준비된 엘리먼트들의 개수</ko>
         * @param {number} [e.readyCount] - Number of elements ready <ko>준비된 엘리먼트들의 개수</ko>
         * @param {number} [e.totalCount] - Total number of elements <ko>엘리먼트들의 총 개수</ko>
         * @param {boolean} [e.isPreReady] - Whether all elements are pre-ready <ko>모든 엘리먼트가 사전 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.isReady] - Whether all elements are ready <ko>모든 엘리먼트가 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.hasLoading] - Whether the loading attribute has been applied <ko>loading 속성이 적용되었는지 여부</ko>
         * @param {boolean} [e.isPreReadyOver] - Whether pre-ready is over <ko>사전 준비가 끝났는지 여부</ko>
         * @param {boolean} [e.isSkip] - Whether the check is omitted due to skip attribute <ko>skip 속성으로 인하여 체크가 생략됐는지 여부</ko>
         * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg" data-width="1280" data-height="853"/>
         *    <img src="ERR" data-width="1280" data-height="853"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check(document.querySelectorAll("img")).on({
         *   readyElement: e => {
         *     // 1, 0, false, 3
         *     // 2, 1, false, 3
         *     // 3, 2, true, 3
         *     console.log(e.readyCount, e.index, e.hasError, e.totalCount),
         *   },
         * });
         * ```
         */

        this.trigger("readyElement", {
          index: index,
          element: info.element,
          hasError: info.hasError,
          errorCount: this.getErrorCount(),
          totalErrorCount: this.totalErrorCount,
          preReadyCount: this.preReadyCount,
          readyCount: this.readyCount,
          totalCount: this.totalCount,
          isPreReady: this.isPreReady(),
          isReady: this.isReady(),
          hasLoading: info.hasLoading,
          isPreReadyOver: this.isPreReadyOver,
          isSkip: info.isSkip
        });
      };

      __proto.onReady = function () {
        /**
         * An event occurs when all element are ready
         * @ko 모든 엘리먼트들이 준비된 경우 이벤트가 발생한다.
         * @event eg.ImReady#ready
         * @param {eg.ImReady.OnReady} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @param {number} [e.errorCount] - The number of elements with errors <ko>에러가 있는 엘리먼트들의 개수</ko>
         * @param {number} [e.totalErrorCount] - The total number of targets with errors <ko>에러가 있는 타겟들의 총 개수</ko>
         * @param {number} [e.totalCount] - Total number of elements <ko>엘리먼트들의 총 개수</ko>
         * @example
         * ```html
         * <div>
         *    <img src="./1.jpg" data-width="1280" data-height="853" style="width:100%"/>
         *    <img src="./2.jpg" data-width="1280" data-height="853"/>
         *    <img src="ERR" data-width="1280" data-height="853"/>
         * </div>
         * ```
         * ## Javascript
         * ```js
         * import ImReady from "@egjs/imready";
         *
         * const im = new ImReady(); // umd: eg.ImReady
         * im.check(document.querySelectorAll("img")).on({
         *   preReady: e => {
         *     // 0, 3
         *     console.log(e.readyCount, e.totalCount),
         *   },
         *   ready: e => {
         *     // 1, 3
         *     console.log(e.errorCount, e.totalCount),
         *   },
         * });
         * ```
         */
        this.trigger("ready", {
          errorCount: this.getErrorCount(),
          totalErrorCount: this.totalErrorCount,
          totalCount: this.totalCount
        });
      };

      __proto.getErrorCount = function () {
        return this.elementInfos.filter(function (info) {
          return info.hasError;
        }).length;
      };

      __proto.hasLoading = function () {
        return this.elementInfos.some(function (info) {
          return info.hasLoading;
        });
      };

      return ImReadyManager;
    }(Component$1);

    var ImageLoader =
    /*#__PURE__*/
    function (_super) {
      __extends$1(ImageLoader, _super);

      function ImageLoader() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = ImageLoader.prototype;

      __proto.checkElement = function () {
        var element = this.element;
        var src = element.getAttribute("src");

        if (element.complete) {
          if (src) {
            // complete
            if (!element.naturalWidth) {
              this.onAlreadyError(element);
            }

            return false;
          } else {
            // Using an external lazy loading module
            this.onAlreadyPreReady();
          }
        }

        this.addEvents();
        IS_IE && element.setAttribute("src", src);
        return true;
      };

      ImageLoader.EVENTS = ["load", "error"];
      return ImageLoader;
    }(Loader);

    var VideoLoader =
    /*#__PURE__*/
    function (_super) {
      __extends$1(VideoLoader, _super);

      function VideoLoader() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = VideoLoader.prototype;

      __proto.checkElement = function () {
        var element = this.element; // HAVE_NOTHING: 0, no information whether or not the audio/video is ready
        // HAVE_METADATA: 1, HAVE_METADATA - metadata for the audio/video is ready
        // HAVE_CURRENT_DATA: 2, data for the current playback position is available, but not enough data to play next frame/millisecond
        // HAVE_FUTURE_DATA: 3, data for the current and at least the next frame is available
        // HAVE_ENOUGH_DATA: 4, enough data available to start playing

        if (element.readyState >= 1) {
          return false;
        }

        if (element.error) {
          this.onAlreadyError(element);
          return false;
        }

        this.addEvents();
        return true;
      };

      VideoLoader.EVENTS = ["loadedmetadata", "error"];
      return VideoLoader;
    }(Loader);

    var ImReady =
    /*#__PURE__*/
    function (_super) {
      __extends$1(ImReady, _super);

      function ImReady(options) {
        if (options === void 0) {
          options = {};
        }

        return _super.call(this, __assign$1({
          loaders: {
            img: ImageLoader,
            video: VideoLoader
          }
        }, options)) || this;
      }

      return ImReady;
    }(ImReadyManager);

    /*
    Copyright (c) 2019-present NAVER Corp.
    name: @egjs/list-differ
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-list-differ
    version: 1.0.0
    */
    /*
    egjs-list-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    var PolyMap =
    /*#__PURE__*/
    function () {
      function PolyMap() {
        this.keys = [];
        this.values = [];
      }

      var __proto = PolyMap.prototype;

      __proto.get = function (key) {
        return this.values[this.keys.indexOf(key)];
      };

      __proto.set = function (key, value) {
        var keys = this.keys;
        var values = this.values;
        var prevIndex = keys.indexOf(key);
        var index = prevIndex === -1 ? keys.length : prevIndex;
        keys[index] = key;
        values[index] = value;
      };

      return PolyMap;
    }();

    /*
    egjs-list-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    var HashMap =
    /*#__PURE__*/
    function () {
      function HashMap() {
        this.object = {};
      }

      var __proto = HashMap.prototype;

      __proto.get = function (key) {
        return this.object[key];
      };

      __proto.set = function (key, value) {
        this.object[key] = value;
      };

      return HashMap;
    }();

    /*
    egjs-list-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    var SUPPORT_MAP = typeof Map === "function";

    /*
    egjs-list-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    var Link =
    /*#__PURE__*/
    function () {
      function Link() {}

      var __proto = Link.prototype;

      __proto.connect = function (prevLink, nextLink) {
        this.prev = prevLink;
        this.next = nextLink;
        prevLink && (prevLink.next = this);
        nextLink && (nextLink.prev = this);
      };

      __proto.disconnect = function () {
        // In double linked list, diconnect the interconnected relationship.
        var prevLink = this.prev;
        var nextLink = this.next;
        prevLink && (prevLink.next = nextLink);
        nextLink && (nextLink.prev = prevLink);
      };

      __proto.getIndex = function () {
        var link = this;
        var index = -1;

        while (link) {
          link = link.prev;
          ++index;
        }

        return index;
      };

      return Link;
    }();

    /*
    egjs-list-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */

    function orderChanged(changed, fixed) {
      // It is roughly in the order of these examples.
      // 4, 6, 0, 2, 1, 3, 5, 7
      var fromLinks = []; // 0, 1, 2, 3, 4, 5, 6, 7

      var toLinks = [];
      changed.forEach(function (_a) {
        var from = _a[0],
            to = _a[1];
        var link = new Link();
        fromLinks[from] = link;
        toLinks[to] = link;
      }); // `fromLinks` are connected to each other by double linked list.

      fromLinks.forEach(function (link, i) {
        link.connect(fromLinks[i - 1]);
      });
      return changed.filter(function (_, i) {
        return !fixed[i];
      }).map(function (_a, i) {
        var from = _a[0],
            to = _a[1];

        if (from === to) {
          return [0, 0];
        }

        var fromLink = fromLinks[from];
        var toLink = toLinks[to - 1];
        var fromIndex = fromLink.getIndex(); // Disconnect the link connected to `fromLink`.

        fromLink.disconnect(); // Connect `fromLink` to the right of `toLink`.

        if (!toLink) {
          fromLink.connect(undefined, fromLinks[0]);
        } else {
          fromLink.connect(toLink, toLink.next);
        }

        var toIndex = fromLink.getIndex();
        return [fromIndex, toIndex];
      });
    }

    var Result =
    /*#__PURE__*/
    function () {
      function Result(prevList, list, added, removed, changed, maintained, changedBeforeAdded, fixed) {
        this.prevList = prevList;
        this.list = list;
        this.added = added;
        this.removed = removed;
        this.changed = changed;
        this.maintained = maintained;
        this.changedBeforeAdded = changedBeforeAdded;
        this.fixed = fixed;
      }

      var __proto = Result.prototype;
      Object.defineProperty(__proto, "ordered", {
        get: function () {
          if (!this.cacheOrdered) {
            this.caculateOrdered();
          }

          return this.cacheOrdered;
        },
        enumerable: true,
        configurable: true
      });
      Object.defineProperty(__proto, "pureChanged", {
        get: function () {
          if (!this.cachePureChanged) {
            this.caculateOrdered();
          }

          return this.cachePureChanged;
        },
        enumerable: true,
        configurable: true
      });

      __proto.caculateOrdered = function () {
        var ordered = orderChanged(this.changedBeforeAdded, this.fixed);
        var changed = this.changed;
        var pureChanged = [];
        this.cacheOrdered = ordered.filter(function (_a, i) {
          var from = _a[0],
              to = _a[1];
          var _b = changed[i],
              fromBefore = _b[0],
              toBefore = _b[1];

          if (from !== to) {
            pureChanged.push([fromBefore, toBefore]);
            return true;
          }
        });
        this.cachePureChanged = pureChanged;
      };

      return Result;
    }();

    /**
     *
     * @memberof eg.ListDiffer
     * @static
     * @function
     * @param - Previous List <ko> 이전 목록 </ko>
     * @param - List to Update <ko> 업데이트 할 목록 </ko>
     * @param - This callback function returns the key of the item. <ko> 아이템의 키를 반환하는 콜백 함수입니다.</ko>
     * @return - Returns the diff between `prevList` and `list` <ko> `prevList`와 `list`의 다른 점을 반환한다.</ko>
     * @example
     * import { diff } from "@egjs/list-differ";
     * // script => eg.ListDiffer.diff
     * const result = diff([0, 1, 2, 3, 4, 5], [7, 8, 0, 4, 3, 6, 2, 1], e => e);
     * // List before update
     * // [1, 2, 3, 4, 5]
     * console.log(result.prevList);
     * // Updated list
     * // [4, 3, 6, 2, 1]
     * console.log(result.list);
     * // Index array of values added to `list`
     * // [0, 1, 5]
     * console.log(result.added);
     * // Index array of values removed in `prevList`
     * // [5]
     * console.log(result.removed);
     * // An array of index pairs of `prevList` and `list` with different indexes from `prevList` and `list`
     * // [[0, 2], [4, 3], [3, 4], [2, 6], [1, 7]]
     * console.log(result.changed);
     * // The subset of `changed` and an array of index pairs that moved data directly. Indicate an array of absolute index pairs of `ordered`.(Formatted by: Array<[index of prevList, index of list]>)
     * // [[4, 3], [3, 4], [2, 6]]
     * console.log(result.pureChanged);
     * // An array of index pairs to be `ordered` that can synchronize `list` before adding data. (Formatted by: Array<[prevIndex, nextIndex]>)
     * // [[4, 1], [4, 2], [4, 3]]
     * console.log(result.ordered);
     * // An array of index pairs of `prevList` and `list` that have not been added/removed so data is preserved
     * // [[0, 2], [4, 3], [3, 4], [2, 6], [1, 7]]
     * console.log(result.maintained);
     */

    function diff(prevList, list, findKeyCallback) {
      var mapClass = SUPPORT_MAP ? Map : findKeyCallback ? HashMap : PolyMap;

      var callback = findKeyCallback || function (e) {
        return e;
      };

      var added = [];
      var removed = [];
      var maintained = [];
      var prevKeys = prevList.map(callback);
      var keys = list.map(callback);
      var prevKeyMap = new mapClass();
      var keyMap = new mapClass();
      var changedBeforeAdded = [];
      var fixed = [];
      var removedMap = {};
      var changed = [];
      var addedCount = 0;
      var removedCount = 0; // Add prevKeys and keys to the hashmap.

      prevKeys.forEach(function (key, prevListIndex) {
        prevKeyMap.set(key, prevListIndex);
      });
      keys.forEach(function (key, listIndex) {
        keyMap.set(key, listIndex);
      }); // Compare `prevKeys` and `keys` and add them to `removed` if they are not in `keys`.

      prevKeys.forEach(function (key, prevListIndex) {
        var listIndex = keyMap.get(key); // In prevList, but not in list, it is removed.

        if (typeof listIndex === "undefined") {
          ++removedCount;
          removed.push(prevListIndex);
        } else {
          removedMap[listIndex] = removedCount;
        }
      }); // Compare `prevKeys` and `keys` and add them to `added` if they are not in `prevKeys`.

      keys.forEach(function (key, listIndex) {
        var prevListIndex = prevKeyMap.get(key); // In list, but not in prevList, it is added.

        if (typeof prevListIndex === "undefined") {
          added.push(listIndex);
          ++addedCount;
        } else {
          maintained.push([prevListIndex, listIndex]);
          removedCount = removedMap[listIndex] || 0;
          changedBeforeAdded.push([prevListIndex - removedCount, listIndex - addedCount]);
          fixed.push(listIndex === prevListIndex);

          if (prevListIndex !== listIndex) {
            changed.push([prevListIndex, listIndex]);
          }
        }
      }); // Sort by ascending order of 'to(list's index).

      removed.reverse();
      return new Result(prevList, list, added, removed, changed, maintained, changedBeforeAdded, fixed);
    }

    /*
    Copyright (c) 2019-present NAVER Corp.
    name: @egjs/children-differ
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-children-differ
    version: 1.0.1
    */

    /*
    egjs-children-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    var findKeyCallback = typeof Map === "function" ? undefined : function () {
      var childrenCount = 0;
      return function (el) {
        return el.__DIFF_KEY__ || (el.__DIFF_KEY__ = ++childrenCount);
      };
    }();

    /*
    egjs-children-differ
    Copyright (c) 2019-present NAVER Corp.
    MIT license
    */
    /**
     *
     * @memberof eg.ChildrenDiffer
     * @static
     * @function
     * @param - Previous List <ko> 이전 목록 </ko>
     * @param - List to Update <ko> 업데이트 할 목록 </ko>
     * @return - Returns the diff between `prevList` and `list` <ko> `prevList`와 `list`의 다른 점을 반환한다.</ko>
     * @example
     * import { diff } from "@egjs/children-differ";
     * // script => eg.ChildrenDiffer.diff
     * const result = diff([0, 1, 2, 3, 4, 5], [7, 8, 0, 4, 3, 6, 2, 1]);
     * // List before update
     * // [1, 2, 3, 4, 5]
     * console.log(result.prevList);
     * // Updated list
     * // [4, 3, 6, 2, 1]
     * console.log(result.list);
     * // Index array of values added to `list`
     * // [0, 1, 5]
     * console.log(result.added);
     * // Index array of values removed in `prevList`
     * // [5]
     * console.log(result.removed);
     * // An array of index pairs of `prevList` and `list` with different indexes from `prevList` and `list`
     * // [[0, 2], [4, 3], [3, 4], [2, 6], [1, 7]]
     * console.log(result.changed);
     * // The subset of `changed` and an array of index pairs that moved data directly. Indicate an array of absolute index pairs of `ordered`.(Formatted by: Array<[index of prevList, index of list]>)
     * // [[4, 3], [3, 4], [2, 6]]
     * console.log(result.pureChanged);
     * // An array of index pairs to be `ordered` that can synchronize `list` before adding data. (Formatted by: Array<[prevIndex, nextIndex]>)
     * // [[4, 1], [4, 2], [4, 3]]
     * console.log(result.ordered);
     * // An array of index pairs of `prevList` and `list` that have not been added/removed so data is preserved
     * // [[0, 2], [4, 3], [3, 4], [2, 6], [1, 7]]
     * console.log(result.maintained);
     */

    function diff$1(prevList, list) {
      return diff(prevList, list, findKeyCallback);
    }

    /*
    Copyright (c) 2021-present NAVER Corp.
    name: @egjs/grid
    license: MIT
    author: NAVER Corp.
    repository: https://github.com/naver/egjs-grid
    version: 1.6.0
    */

    /*! *****************************************************************************
    Copyright (c) Microsoft Corporation.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted.

    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
    PERFORMANCE OF THIS SOFTWARE.
    ***************************************************************************** */

    /* global Reflect, Promise */
    var extendStatics$2 = function (d, b) {
      extendStatics$2 = Object.setPrototypeOf || {
        __proto__: []
      } instanceof Array && function (d, b) {
        d.__proto__ = b;
      } || function (d, b) {
        for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p];
      };

      return extendStatics$2(d, b);
    };

    function __extends$2(d, b) {
      if (typeof b !== "function" && b !== null) throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
      extendStatics$2(d, b);

      function __() {
        this.constructor = d;
      }

      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    }
    var __assign$2 = function () {
      __assign$2 = Object.assign || function __assign(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
          s = arguments[i];

          for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
        }

        return t;
      };

      return __assign$2.apply(this, arguments);
    };
    function __decorate$1(decorators, target, key, desc) {
      var c = arguments.length,
          r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc,
          d;
      if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
      return c > 3 && r && Object.defineProperty(target, key, r), r;
    }
    /** @deprecated */

    function __spreadArrays$2() {
      for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;

      for (var r = Array(s), k = 0, i = 0; i < il; i++) for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) r[k] = a[j];

      return r;
    }

    var DEFAULT_GRID_OPTIONS = {
      horizontal: false,
      useTransform: false,
      percentage: false,
      isEqualSize: false,
      isConstantSize: false,
      gap: 0,
      attributePrefix: "data-grid-",
      resizeDebounce: 100,
      maxResizeDebounce: 0,
      autoResize: true,
      preserveUIOnDestroy: false,
      defaultDirection: "end",
      externalContainerManager: null,
      externalItemRenderer: null,
      renderOnPropertyChange: true,
      useFit: true
    };
    var PROPERTY_TYPE;

    (function (PROPERTY_TYPE) {
      PROPERTY_TYPE[PROPERTY_TYPE["PROPERTY"] = 1] = "PROPERTY";
      PROPERTY_TYPE[PROPERTY_TYPE["RENDER_PROPERTY"] = 2] = "RENDER_PROPERTY";
    })(PROPERTY_TYPE || (PROPERTY_TYPE = {}));

    var MOUNT_STATE;

    (function (MOUNT_STATE) {
      MOUNT_STATE[MOUNT_STATE["UNCHECKED"] = 1] = "UNCHECKED";
      MOUNT_STATE[MOUNT_STATE["UNMOUNTED"] = 2] = "UNMOUNTED";
      MOUNT_STATE[MOUNT_STATE["MOUNTED"] = 3] = "MOUNTED";
    })(MOUNT_STATE || (MOUNT_STATE = {}));

    var UPDATE_STATE;

    (function (UPDATE_STATE) {
      UPDATE_STATE[UPDATE_STATE["NEED_UPDATE"] = 1] = "NEED_UPDATE";
      UPDATE_STATE[UPDATE_STATE["WAIT_LOADING"] = 2] = "WAIT_LOADING";
      UPDATE_STATE[UPDATE_STATE["UPDATED"] = 3] = "UPDATED";
    })(UPDATE_STATE || (UPDATE_STATE = {}));

    var GRID_PROPERTY_TYPES = {
      gap: PROPERTY_TYPE.RENDER_PROPERTY,
      defaultDirection: PROPERTY_TYPE.PROPERTY,
      renderOnPropertyChange: PROPERTY_TYPE.PROPERTY,
      preserveUIOnDestroy: PROPERTY_TYPE.PROPERTY,
      useFit: PROPERTY_TYPE.PROPERTY
    };
    var RECT_NAMES = {
      horizontal: {
        inlinePos: "top",
        contentPos: "left",
        inlineSize: "height",
        contentSize: "width"
      },
      vertical: {
        inlinePos: "left",
        contentPos: "top",
        inlineSize: "width",
        contentSize: "height"
      }
    };

    var ContainerManager =
    /*#__PURE__*/
    function (_super) {
      __extends$2(ContainerManager, _super);

      function ContainerManager(container, options) {
        var _this = _super.call(this) || this;

        _this.container = container;
        _this._resizeTimer = 0;
        _this._maxResizeDebounceTimer = 0;

        _this._onResize = function () {
          clearTimeout(_this._resizeTimer);
          clearTimeout(_this._maxResizeDebounceTimer);
          _this._maxResizeDebounceTimer = 0;
          _this._resizeTimer = 0;

          _this.trigger("resize");
        };

        _this._scheduleResize = function () {
          var _a = _this.options,
              resizeDebounce = _a.resizeDebounce,
              maxResizeDebounce = _a.maxResizeDebounce;

          if (!_this._maxResizeDebounceTimer && maxResizeDebounce >= resizeDebounce) {
            _this._maxResizeDebounceTimer = window.setTimeout(_this._onResize, maxResizeDebounce);
          }

          if (_this._resizeTimer) {
            clearTimeout(_this._resizeTimer);
            _this._resizeTimer = 0;
          }

          _this._resizeTimer = window.setTimeout(_this._onResize, resizeDebounce);
        };

        _this.options = __assign$2({
          horizontal: DEFAULT_GRID_OPTIONS.horizontal,
          autoResize: DEFAULT_GRID_OPTIONS.autoResize,
          resizeDebounce: DEFAULT_GRID_OPTIONS.resizeDebounce,
          maxResizeDebounce: DEFAULT_GRID_OPTIONS.maxResizeDebounce
        }, options);

        _this._init();

        return _this;
      }

      var __proto = ContainerManager.prototype;

      __proto.resize = function () {
        var container = this.container;
        this.setRect({
          width: container.clientWidth,
          height: container.clientHeight
        });
      };

      __proto.getRect = function () {
        return this.rect;
      };

      __proto.setRect = function (rect) {
        this.rect = __assign$2({}, rect);
      };

      __proto.getInlineSize = function () {
        return this.rect[this.options.horizontal ? "height" : "width"];
      };

      __proto.getContentSize = function () {
        return this.rect[this.options.horizontal ? "width" : "height"];
      };

      __proto.getStatus = function () {
        return {
          rect: __assign$2({}, this.rect)
        };
      };

      __proto.setStatus = function (status) {
        this.rect = __assign$2({}, status.rect);
        this.setContentSize(this.getContentSize());
      };

      __proto.setContentSize = function (size) {
        var sizeName = this.options.horizontal ? "width" : "height";
        this.rect[sizeName] = size;
        this.container.style[sizeName] = size + "px";
      };

      __proto.destroy = function (options) {
        if (options === void 0) {
          options = {};
        }

        window.removeEventListener("resize", this._scheduleResize);

        if (!options.preserveUI) {
          this.container.style.cssText = this.orgCSSText;
        }
      };

      __proto._init = function () {
        var container = this.container;
        var style = window.getComputedStyle(container);
        this.orgCSSText = container.style.cssText;

        if (style.position === "static") {
          container.style.position = "relative";
        }

        if (this.options.autoResize) {
          window.addEventListener("resize", this._scheduleResize);
        }
      };

      return ContainerManager;
    }(Component);

    function getKeys(obj) {
      return Object.keys(obj);
    }
    function isString(val) {
      return typeof val === "string";
    }
    function isObject(val) {
      return typeof val === "object";
    }
    function isNumber(val) {
      return typeof val === "number";
    }
    function camelize(str) {
      return str.replace(/[\s-_]([a-z])/g, function (all, letter) {
        return letter.toUpperCase();
      });
    }
    function getDataAttributes(element, attributePrefix) {
      var dataAttributes = {};
      var attributes = element.attributes;
      var length = attributes.length;

      for (var i = 0; i < length; ++i) {
        var attribute = attributes[i];
        var name = attribute.name,
            value = attribute.value;

        if (name.indexOf(attributePrefix) === -1) {
          continue;
        }

        dataAttributes[camelize(name.replace(attributePrefix, ""))] = value;
      }

      return dataAttributes;
    }
    /* Class Decorator */

    function GetterSetter(component) {
      var prototype = component.prototype,
          propertyTypes = component.propertyTypes;

      var _loop_1 = function (name) {
        var shouldRender = propertyTypes[name] === PROPERTY_TYPE.RENDER_PROPERTY;
        var descriptor = Object.getOwnPropertyDescriptor(prototype, name) || {};

        var getter = descriptor.get || function get() {
          return this.options[name];
        };

        var setter = descriptor.set || function set(value) {
          var options = this.options;
          var prevValue = options[name];

          if (prevValue === value) {
            return;
          }

          options[name] = value;

          if (shouldRender && options.renderOnPropertyChange) {
            this.scheduleRender();
          }
        };

        var attributes = {
          enumerable: true,
          configurable: true,
          get: getter,
          set: setter
        };
        Object.defineProperty(prototype, name, attributes);
      };

      for (var name in propertyTypes) {
        _loop_1(name);
      }
    }
    function withMethods(methods) {
      return function (prototype, memberName) {
        methods.forEach(function (name) {
          if (name in prototype) {
            return;
          }

          prototype[name] = function () {
            var _a;

            var args = [];

            for (var _i = 0; _i < arguments.length; _i++) {
              args[_i] = arguments[_i];
            }

            var result = (_a = this[memberName])[name].apply(_a, args); // fix `this` type to return your own `class` instance to the instance using the decorator.


            if (result === this[memberName]) {
              return this;
            } else {
              return result;
            }
          };
        });
      };
    }
    function range(length) {
      var arr = [];

      for (var i = 0; i < length; ++i) {
        arr.push(i);
      }

      return arr;
    }
    function getRangeCost(value, valueRange) {
      return Math.max(value - valueRange[1], valueRange[0] - value, 0) + 1;
    }

    var ItemRenderer =
    /*#__PURE__*/
    function () {
      function ItemRenderer(options) {
        this.initialRect = null;
        this.sizePercetage = false;
        this.posPercetage = false;
        this.options = __assign$2({
          attributePrefix: DEFAULT_GRID_OPTIONS.attributePrefix,
          useTransform: DEFAULT_GRID_OPTIONS.useTransform,
          horizontal: DEFAULT_GRID_OPTIONS.horizontal,
          percentage: DEFAULT_GRID_OPTIONS.percentage,
          isEqualSize: DEFAULT_GRID_OPTIONS.isEqualSize,
          isConstantSize: DEFAULT_GRID_OPTIONS.isConstantSize
        }, options);

        this._init();
      }

      var __proto = ItemRenderer.prototype;

      __proto.resize = function () {
        this.initialRect = null;
      };

      __proto.renderItems = function (items) {
        var _this = this;

        items.forEach(function (item) {
          _this._renderItem(item);
        });
      };

      __proto.getInlineSize = function () {
        return this.containerRect[this.options.horizontal ? "height" : "width"];
      };

      __proto.setContainerRect = function (rect) {
        this.containerRect = rect;
      };

      __proto.updateItems = function (items) {
        var _this = this;

        items.forEach(function (item) {
          _this._updateItem(item);
        });
      };

      __proto.getStatus = function () {
        return {
          initialRect: this.initialRect
        };
      };

      __proto.setStatus = function (status) {
        this.initialRect = status.initialRect;
      };

      __proto._init = function () {
        var percentage = this.options.percentage;
        var sizePercentage = false;
        var posPercentage = false;

        if (percentage === true) {
          sizePercentage = true;
          posPercentage = true;
        } else if (percentage) {
          if (percentage.indexOf("position") > -1) {
            posPercentage = true;
          }

          if (percentage.indexOf("size") > -1) {
            sizePercentage = true;
          }
        }

        this.posPercetage = posPercentage;
        this.sizePercetage = sizePercentage;
      };

      __proto._updateItem = function (item) {
        var _a = this.options,
            isEqualSize = _a.isEqualSize,
            isConstantSize = _a.isConstantSize;
        var initialRect = this.initialRect;
        var orgRect = item.orgRect,
            element = item.element;
        var isLoading = item.updateState === UPDATE_STATE.WAIT_LOADING;
        var hasOrgSize = orgRect && orgRect.width && orgRect.height;
        var rect;

        if (isEqualSize && initialRect) {
          rect = initialRect;
        } else if (isConstantSize && hasOrgSize && !isLoading) {
          rect = orgRect;
        } else if (!element) {
          return;
        } else {
          rect = {
            left: element.offsetLeft,
            top: element.offsetTop,
            width: element.offsetWidth,
            height: element.offsetHeight
          };
        }

        if (!item.isFirstUpdate) {
          item.orgRect = __assign$2({}, rect);
        }

        item.rect = __assign$2({}, rect);

        if (item.element) {
          item.mountState = MOUNT_STATE.MOUNTED;
        }

        if (item.updateState === UPDATE_STATE.NEED_UPDATE) {
          item.updateState = UPDATE_STATE.UPDATED;
          item.isFirstUpdate = true;
        }

        item.attributes = element ? getDataAttributes(element, this.options.attributePrefix) : {};

        if (!isLoading) {
          this.initialRect = __assign$2({}, rect);
        }

        return rect;
      };

      __proto._renderItem = function (item) {
        var element = item.element;
        var cssRect = item.cssRect;

        if (!element || !cssRect) {
          return;
        }

        var _a = this.options,
            horizontal = _a.horizontal,
            useTransform = _a.useTransform;
        var posPercentage = this.posPercetage;
        var sizePercentage = this.sizePercetage;
        var cssTexts = ["position: absolute;"];
        var _b = RECT_NAMES[horizontal ? "horizontal" : "vertical"],
            sizeName = _b.inlineSize,
            posName = _b.inlinePos;
        var inlineSize = this.getInlineSize();
        var keys = getKeys(cssRect);

        if (useTransform) {
          keys = keys.filter(function (key) {
            return key !== "top" && key !== "left";
          });
          cssTexts.push("transform: " + ("translate(" + (cssRect.left || 0) + "px, " + (cssRect.top || 0) + "px);"));
        }

        cssTexts.push.apply(cssTexts, keys.map(function (name) {
          var value = cssRect[name];

          if (name === sizeName && sizePercentage || name === posName && posPercentage) {
            return name + ": " + value / inlineSize * 100 + "%;";
          }

          return name + ": " + value + "px;";
        }));
        element.style.cssText += cssTexts.join("");
      };

      return ItemRenderer;
    }();

    /**
     * @memberof Grid
     * @implements Grid.GridItem.GridItemStatus
     */

    var GridItem =
    /*#__PURE__*/
    function () {
      /**
       * @constructor
       * @param horizontal - Direction of the scroll movement. (true: horizontal, false: vertical) <ko>스크롤 이동 방향. (true: 가로방향, false: 세로방향)</ko>
       * @param itemStatus - Default status object of GridItem module. <ko>GridItem 모듈의 기본 status 객체.</ko>
       */
      function GridItem(horizontal, itemStatus) {
        if (itemStatus === void 0) {
          itemStatus = {};
        }

        var _a;

        this.horizontal = horizontal;
        this.isUpdate = false;
        this.hasTransition = false;
        this.transitionDuration = "";
        var element = itemStatus.element;

        var status = __assign$2({
          key: "",
          orgRect: {
            left: 0,
            top: 0,
            width: 0,
            height: 0
          },
          rect: {
            left: 0,
            top: 0,
            width: 0,
            height: 0
          },
          cssRect: {},
          attributes: {},
          data: {},
          isFirstUpdate: false,
          mountState: MOUNT_STATE.UNCHECKED,
          updateState: UPDATE_STATE.NEED_UPDATE,
          element: element || null,
          orgCSSText: (_a = element === null || element === void 0 ? void 0 : element.style.cssText) !== null && _a !== void 0 ? _a : "",
          gridData: {}
        }, itemStatus);

        for (var name in status) {
          this[name] = status[name];
        }
      }

      var __proto = GridItem.prototype;
      Object.defineProperty(__proto, "orgInlineSize", {
        /**
         * The size in inline direction before first rendering. "width" if horizontal is false, "height" otherwise.
         * @ko 첫 렌더링 되기 전의 inline 방향의 사이즈. horizontal이 false면 "width", 아니면 "height".
         * @member Grid.GridItem#orgInlineSize
         */
        get: function () {
          var orgRect = this.orgRect || this.rect;
          return this.horizontal ? orgRect.height : orgRect.width;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "orgContentSize", {
        /**
         * The size in content direction before first rendering. "height" if horizontal is false, "width" otherwise.
         * @ko 첫 렌더링 되기 전의 content 방향의 사이즈. horizontal이 false면 "height", 아니면 "width".
         * @member Grid.GridItem#orgContentSize
         */
        get: function () {
          var orgRect = this.orgRect || this.rect;
          return this.horizontal ? orgRect.width : orgRect.height;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "inlineSize", {
        /**
         * The size in inline direction. "width" if horizontal is false, "height" otherwise.
         * @ko inline 방향의 사이즈. horizontal이 false면 "width", 아니면 "height".
         * @member Grid.GridItem#inlineSize
         */
        get: function () {
          var rect = this.rect;
          return this.horizontal ? rect.height : rect.width;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "contentSize", {
        /**
         * The size in content direction. "height" if horizontal is false, "width" otherwise.
         * @ko content 방향의 사이즈. horizontal이 false면 "height", 아니면 "width".
         * @member Grid.GridItem#contentSize
         */
        get: function () {
          var rect = this.rect;
          return this.horizontal ? rect.width : rect.height;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "cssInlineSize", {
        /**
         * The CSS size in inline direction applied to the Grid. "width" if horizontal is false, "height" otherwise.
         * @ko Grid에 적용된 inline 방향의 CSS 사이즈. horizontal이 false면 "width", 아니면 "height".
         * @member Grid.GridItem#cssInlineSize
         */
        get: function () {
          var cssRect = this.cssRect;
          return this.horizontal ? cssRect.height : cssRect.width;
        },
        set: function (inlineSize) {
          var cssRect = this.cssRect;
          cssRect[this.horizontal ? "height" : "width"] = inlineSize;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "cssContentSize", {
        /**
         * The CSS size in content direction applied to the Grid. "height" if horizontal is false, "width" otherwise.
         * @ko Grid에 적용된 content 방향의 CSS 사이즈. horizontal이 false면 "height", 아니면 "width".
         * @member Grid.GridItem#cssContentSize
         */
        get: function () {
          var cssRect = this.cssRect;
          return this.horizontal ? cssRect.width : cssRect.height;
        },
        set: function (contentSize) {
          var cssRect = this.cssRect;
          cssRect[this.horizontal ? "width" : "height"] = contentSize;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "cssInlinePos", {
        /**
         * The CSS pos in inline direction applied to the Grid. "left" if horizontal is false, "top" otherwise.
         * @ko Grid에 적용된 inline 방향의 CSS 포지션. horizontal이 false면 "left", 아니면 "top".
         * @member Grid.GridItem#cssInlinePos
         */
        get: function () {
          var cssRect = this.cssRect;
          return this.horizontal ? cssRect.top : cssRect.left;
        },
        set: function (inlinePos) {
          var cssRect = this.cssRect;
          cssRect[this.horizontal ? "top" : "left"] = inlinePos;
        },
        enumerable: false,
        configurable: true
      });
      Object.defineProperty(__proto, "cssContentPos", {
        /**
         * The CSS pos in content direction applied to the Grid. "top" if horizontal is false, "left" otherwise.
         * @ko Grid에 적용된 content 방향의 CSS 포지션. horizontal이 false면 "top", 아니면 "left".
         * @member Grid.GridItem#cssContentPos
         */
        get: function () {
          var cssRect = this.cssRect;
          return this.horizontal ? cssRect.left : cssRect.top;
        },
        set: function (contentPos) {
          var cssRect = this.cssRect;
          cssRect[this.horizontal ? "left" : "top"] = contentPos;
        },
        enumerable: false,
        configurable: true
      });
      /**
       * Set CSS Rect through GridRect.
       * @ko GridRect을 통해 CSS Rect를 설정한다.
       * @param - The style for setting CSS rect. <ko>CSS rect를 설정하기 위한 스타일.</ko>
       */

      __proto.setCSSGridRect = function (gridRect) {
        var names = RECT_NAMES[this.horizontal ? "horizontal" : "vertical"];
        var rect = {};

        for (var name in gridRect) {
          rect[names[name]] = gridRect[name];
        }

        this.cssRect = rect;
      };
      /**
       * Returns the status of the item.
       * @ko 아이템의 상태를 반환한다.
       */


      __proto.getStatus = function () {
        return {
          mountState: this.mountState,
          updateState: this.updateState,
          attributes: this.attributes,
          orgCSSText: this.orgCSSText,
          isFirstUpdate: this.isFirstUpdate,
          element: null,
          key: this.key,
          orgRect: this.orgRect,
          rect: this.rect,
          cssRect: this.cssRect,
          gridData: this.gridData,
          data: this.data
        };
      };
      /**
       * Returns minimized status of the item.
       * @ko 아이템의 간소화된 상태를 반환한다.
       */


      __proto.getMinimizedStatus = function () {
        var status = {
          orgRect: this.orgRect,
          rect: this.rect,
          cssRect: this.cssRect,
          attributes: this.attributes,
          gridData: this.gridData
        };

        if (typeof this.key !== "undefined") {
          status.key = this.key;
        }

        if (this.mountState !== MOUNT_STATE.UNCHECKED) {
          status.mountState = this.mountState;
        }

        if (this.updateState !== UPDATE_STATE.NEED_UPDATE) {
          status.updateState = this.updateState;
        }

        if (this.isFirstUpdate) {
          status.isFirstUpdate = true;
        }

        if (this.orgCSSText) {
          status.orgCSSText = this.orgCSSText;
        }

        return status;
      };

      return GridItem;
    }();

    /**
     * @extends eg.Component
     */

    var Grid =
    /*#__PURE__*/
    function (_super) {
      __extends$2(Grid, _super);
      /**
       * @param - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
       * @param - The option object of the Grid module <ko>Grid 모듈의 옵션 객체</ko>
       */


      function Grid(containerElement, options) {
        if (options === void 0) {
          options = {};
        }

        var _this = _super.call(this) || this;

        _this.items = [];
        _this.outlines = {
          start: [],
          end: []
        };
        _this._renderTimer = 0;

        _this._onResize = function () {
          _this.renderItems({
            useResize: true
          });
        };

        _this.options = __assign$2(__assign$2({}, _this.constructor.defaultOptions), options);
        _this.containerElement = isString(containerElement) ? document.querySelector(containerElement) : containerElement;
        var _a = _this.options,
            isEqualSize = _a.isEqualSize,
            isConstantSize = _a.isConstantSize,
            useTransform = _a.useTransform,
            horizontal = _a.horizontal,
            percentage = _a.percentage,
            externalContainerManager = _a.externalContainerManager,
            externalItemRenderer = _a.externalItemRenderer,
            resizeDebounce = _a.resizeDebounce,
            maxResizeDebounce = _a.maxResizeDebounce,
            autoResize = _a.autoResize; // TODO: 테스트용 설정

        _this.containerManager = externalContainerManager || new ContainerManager(_this.containerElement, {
          horizontal: horizontal,
          resizeDebounce: resizeDebounce,
          maxResizeDebounce: maxResizeDebounce,
          autoResize: autoResize
        }).on("resize", _this._onResize);
        _this.itemRenderer = externalItemRenderer || new ItemRenderer({
          useTransform: useTransform,
          isEqualSize: isEqualSize,
          isConstantSize: isConstantSize,
          percentage: percentage
        });

        _this._init();

        return _this;
      }

      var __proto = Grid.prototype;
      Grid_1 = Grid;
      /**
       * Return Container Element.
       * @ko 컨테이너 엘리먼트를 반환한다.
       */

      __proto.getContainerElement = function () {
        return this.containerElement;
      };
      /**
       * Return items.
       * @ko 아이템들을 반환한다.
       */


      __proto.getItems = function () {
        return this.items;
      };
      /**
       * Returns the children of the container element.
       * @ko 컨테이너 엘리먼트의 children을 반환한다.
       */


      __proto.getChildren = function () {
        return [].slice.call(this.containerElement.children);
      };
      /**
       * Set items.
       * @ko 아이템들을 설정한다.
       * @param items - The items to set. <ko>설정할 아이템들</ko>
       */


      __proto.setItems = function (items) {
        this.items = items;
        return this;
      };
      /**
       * Gets the container's inline size. ("width" if horizontal is false, otherwise "height")
       * @ko container의 inline 사이즈를 가져온다. (horizontal이 false면 "width", 아니면 "height")
       */


      __proto.getContainerInlineSize = function () {
        return this.containerManager.getInlineSize();
      };
      /**
       * Returns the outlines of the start and end of the Grid.
       * @ko Grid의 처음과 끝의 outline을 반환한다.
       */


      __proto.getOutlines = function () {
        return this.outlines;
      };
      /**
       * Set outlines.
       * @ko 아웃라인을 설정한다.
       * @param outlines - The outlines to set. <ko>설정할 아웃라인.</ko>
       */


      __proto.setOutlines = function (outlines) {
        this.outlines = outlines;
        return this;
      };
      /**
       * When elements change, it synchronizes and renders items.
       * @ko elements가 바뀐 경우 동기화를 하고 렌더링을 한다.
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       */


      __proto.syncElements = function (options) {
        if (options === void 0) {
          options = {};
        }

        var items = this.items;
        var horizontal = this.options.horizontal;
        var elements = this.getChildren();

        var _a = diff$1(this.items.map(function (item) {
          return item.element;
        }), elements),
            added = _a.added,
            maintained = _a.maintained,
            changed = _a.changed,
            removed = _a.removed;

        var nextItems = [];
        maintained.forEach(function (_a) {
          var beforeIndex = _a[0],
              afterIndex = _a[1];
          nextItems[afterIndex] = items[beforeIndex];
        });
        added.forEach(function (index) {
          nextItems[index] = new GridItem(horizontal, {
            element: elements[index]
          });
        });
        this.setItems(nextItems);

        if (added.length || removed.length || changed.length) {
          this.renderItems(options);
        }

        return this;
      };
      /**
       * Update the size of the items and render them.
       * @ko 아이템들의 사이즈를 업데이트하고 렌더링을 한다.
       * @param - Items to be updated. <ko>업데이트할 아이템들.</ko>
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       */


      __proto.updateItems = function (items, options) {
        if (items === void 0) {
          items = this.items;
        }

        if (options === void 0) {
          options = {};
        }

        items.forEach(function (item) {
          item.updateState = UPDATE_STATE.NEED_UPDATE;
        });
        this.checkReady(options);
        return this;
      };
      /**
       * Rearrange items to fit the grid and render them. When rearrange is complete, the `renderComplete` event is fired.
       * @ko grid에 맞게 아이템을 재배치하고 렌더링을 한다. 배치가 완료되면 `renderComplete` 이벤트가 발생한다.
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       * @example
       * ```js
       * import { MasonryGrid } from "@egjs/grid";
       * const grid = new MasonryGrid();
       *
       * grid.on("renderComplete", e => {
       *   console.log(e);
       * });
       * grid.renderItems();
       * ```
       */


      __proto.renderItems = function (options) {
        if (options === void 0) {
          options = {};
        }

        this._clearRenderTimer();

        if (!this.getItems().length && this.getChildren().length) {
          this.syncElements(options);
        } else if (options.useResize) {
          // Resize container and Update all items
          this._resizeContainer();

          this.updateItems(this.items, options);
        } else {
          // Update only items that need to be updated.
          this.checkReady(options);
        }

        return this;
      };
      /**
       * Returns current status such as item's position, size. The returned status can be restored with the setStatus() method.
       * @ko 아이템의 위치, 사이즈 등 현재 상태를 반환한다. 반환한 상태는 setStatus() 메서드로 복원할 수 있다.
       * @param - Whether to minimize the status of the item. (default: false) <ko>item의 status를 최소화할지 여부. (default: false)</ko>
       */


      __proto.getStatus = function (minimize) {
        return {
          outlines: this.outlines,
          items: this.items.map(function (item) {
            return minimize ? item.getMinimizedStatus() : item.getStatus();
          }),
          containerManager: this.containerManager.getStatus(),
          itemRenderer: this.itemRenderer.getStatus()
        };
      };
      /**
       * Set status of the Grid module with the status returned through a call to the getStatus() method.
       * @ko getStatus() 메서드에 대한 호출을 통해 반환된 상태로 Grid 모듈의 상태를 설정한다.
       */


      __proto.setStatus = function (status) {
        var _this = this;

        var horizontal = this.options.horizontal;
        var containerManager = this.containerManager;
        var prevInlineSize = containerManager.getInlineSize();
        var children = this.getChildren();
        this.itemRenderer.setStatus(status.itemRenderer);
        containerManager.setStatus(status.containerManager);
        this.outlines = status.outlines;
        this.items = status.items.map(function (item, i) {
          return new GridItem(horizontal, __assign$2(__assign$2({}, item), {
            element: children[i]
          }));
        });
        this.itemRenderer.renderItems(this.items);

        if (prevInlineSize !== containerManager.getInlineSize()) {
          this.renderItems({
            useResize: true
          });
        } else {
          window.setTimeout(function () {
            _this._renderComplete({
              direction: _this.defaultDirection,
              mounted: _this.items,
              updated: [],
              isResize: false
            });
          });
        }

        return this;
      };
      /**
       * Releases the instnace and events and returns the CSS of the container and elements.
       * @ko 인스턴스와 이벤트를 해제하고 컨테이너와 엘리먼트들의 CSS를 되돌린다.
       * @param Options for destroy. <ko>destory()를 위한 옵션</ko>
       */


      __proto.destroy = function (options) {
        var _a;

        if (options === void 0) {
          options = {};
        }

        var _b = options.preserveUI,
            preserveUI = _b === void 0 ? this.options.preserveUIOnDestroy : _b;
        this.containerManager.destroy({
          preserveUI: preserveUI
        });

        if (!preserveUI) {
          this.items.forEach(function (_a) {
            var element = _a.element,
                orgCSSText = _a.orgCSSText;

            if (element) {
              element.style.cssText = orgCSSText;
            }
          });
        }

        (_a = this._im) === null || _a === void 0 ? void 0 : _a.destroy();
      };

      __proto.checkReady = function (options) {
        var _this = this;

        var _a;

        if (options === void 0) {
          options = {};
        } // Grid: renderItems => checkReady => readyItems => applyGrid


        var items = this.items;
        var updated = items.filter(function (item) {
          var _a;

          return ((_a = item.element) === null || _a === void 0 ? void 0 : _a.parentNode) && item.updateState !== UPDATE_STATE.UPDATED;
        });
        var mounted = updated.filter(function (item) {
          return item.mountState !== MOUNT_STATE.MOUNTED;
        });
        var moreUpdated = [];
        mounted.filter(function (item) {
          if (item.hasTransition) {
            return true;
          } else {
            var element = item.element;
            var transitionDuration = parseFloat(getComputedStyle(element).transitionDuration);

            if (transitionDuration > 0) {
              item.hasTransition = true;
              item.transitionDuration = element.style.transitionDuration;
              return true;
            }
          }

          return false;
        }).forEach(function (item) {
          item.element.style.transitionDuration = "0s";
        });
        (_a = this._im) === null || _a === void 0 ? void 0 : _a.destroy();
        this._im = new ImReady({
          prefix: this.options.attributePrefix
        }).on("preReadyElement", function (e) {
          updated[e.index].updateState = UPDATE_STATE.WAIT_LOADING;
        }).on("preReady", function () {
          _this.itemRenderer.updateItems(updated);

          _this.readyItems(mounted, updated, options);
        }).on("readyElement", function (e) {
          var item = updated[e.index];
          item.updateState = UPDATE_STATE.NEED_UPDATE; // after preReady

          if (e.isPreReadyOver) {
            item.element.style.cssText = item.orgCSSText;

            _this.itemRenderer.updateItems([item]);

            _this.readyItems([], [item], options);
          }
        }).on("error", function (e) {
          var item = items[e.index];
          /**
           * This event is fired when an error occurs in the content.
           * @ko 콘텐츠 로드에 에러가 날 때 발생하는 이벤트.
           * @event Grid#contentError
           * @param {Grid.OnContentError} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           * @example
           * ```js
           * grid.on("contentError", e => {
           *   e.update();
           * });
           * ```
          */

          _this.trigger("contentError", {
            element: e.element,
            target: e.target,
            item: item,
            update: function () {
              moreUpdated.push(item);
            }
          });
        }).on("ready", function () {
          if (moreUpdated.length) {
            _this.updateItems(moreUpdated);
          }
        }).check(updated.map(function (item) {
          return item.element;
        }));
      };

      __proto.scheduleRender = function () {
        var _this = this;

        this._clearRenderTimer();

        this._renderTimer = window.setTimeout(function () {
          _this.renderItems();
        });
      };

      __proto.fitOutlines = function (useFit) {
        if (useFit === void 0) {
          useFit = this.useFit;
        }

        var outlines = this.outlines;
        var startOutline = outlines.start;
        var endOutline = outlines.end;
        var outlineOffset = startOutline.length ? Math.min.apply(Math, startOutline) : 0; // If the outline is less than 0, a fit occurs forcibly.

        if (!useFit && outlineOffset > 0) {
          return;
        }

        outlines.start = startOutline.map(function (point) {
          return point - outlineOffset;
        });
        outlines.end = endOutline.map(function (point) {
          return point - outlineOffset;
        });
        this.items.forEach(function (item) {
          var contentPos = item.cssContentPos;

          if (!isNumber(contentPos)) {
            return;
          }

          item.cssContentPos = contentPos - outlineOffset;
        });
      };

      __proto.readyItems = function (mounted, updated, options) {
        var prevOutlines = this.outlines;
        var direction = options.direction || this.options.defaultDirection;
        var prevOutline = options.outline || prevOutlines[direction === "end" ? "start" : "end"];
        var items = this.items;
        var nextOutlines = {
          start: __spreadArrays$2(prevOutline),
          end: __spreadArrays$2(prevOutline)
        };
        updated.forEach(function (item) {
          item.isUpdate = true;
        });

        if (items.length) {
          nextOutlines = this.applyGrid(this.items, direction, prevOutline);
        }

        updated.forEach(function (item) {
          item.isUpdate = false;
        });
        this.setOutlines(nextOutlines);
        this.fitOutlines();
        this.itemRenderer.renderItems(this.items);

        this._refreshContainerContentSize();

        var transitionMounted = mounted.filter(function (item) {
          return item.hasTransition;
        });

        if (transitionMounted.length) {
          this.containerManager.resize();
          transitionMounted.forEach(function (item) {
            var element = item.element;
            element.style.transitionDuration = item.transitionDuration;
          });
        }

        this._renderComplete({
          direction: direction,
          mounted: mounted,
          updated: updated,
          isResize: !!options.useResize
        });
      };

      __proto._renderComplete = function (e) {
        /**
         * This event is fired when the Grid has completed rendering.
         * @ko Grid가 렌더링이 완료됐을 때  발생하는 이벤트이다.
         * @event Grid#renderComplete
         * @param {Grid.OnRenderComplete} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
         * @example
         * ```js
         * grid.on("renderComplete", e => {
         *   console.log(e.mounted, e.updated, e.useResize);
         * });
         * ```
         */
        this.trigger("renderComplete", e);
      };

      __proto._clearRenderTimer = function () {
        clearTimeout(this._renderTimer);
        this._renderTimer = 0;
      };

      __proto._refreshContainerContentSize = function () {
        var _a = this.outlines,
            startOutline = _a.start,
            endOutline = _a.end;
        var gap = this.options.gap;
        var endPoint = endOutline.length ? Math.max.apply(Math, endOutline) : 0;
        var startPoint = startOutline.length ? Math.max.apply(Math, startOutline) : 0;
        var contentSize = Math.max(startPoint, endPoint - gap);
        this.containerManager.setContentSize(contentSize);
      };

      __proto._resizeContainer = function () {
        this.containerManager.resize();
        this.itemRenderer.setContainerRect(this.containerManager.getRect());
      };

      __proto._init = function () {
        this._resizeContainer();
      };

      var Grid_1;
      Grid.defaultOptions = DEFAULT_GRID_OPTIONS;
      Grid.propertyTypes = GRID_PROPERTY_TYPES;
      Grid = Grid_1 = __decorate$1([GetterSetter], Grid);
      return Grid;
    }(Component);
    /**
     * Gap used to create space around items.
     * @ko 아이템들 사이의 공간.
     * @name Grid#gap
     * @type {$ts:Grid.GridOptions["gap"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   gap: 0,
     * });
     *
     * grid.gap = 5;
     * ```
     */

    /**
     * The default direction value when direction is not set in the render option.
     * @ko render옵션에서 direction을 미설정시의 기본 방향값.
     * @name Grid#defaultDirection
     * @type {$ts:Grid.GridOptions["defaultDirection"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   defaultDirection: "end",
     * });
     *
     * grid.defaultDirection = "start";
     * ```
     */

    /**
     * Whether to move the outline to 0 when the top is empty when rendering. However, if it overflows above the top, the outline is forced to 0. (default: true)
     * @ko 렌더링시 상단이 비어있을 때 아웃라인을 0으로 이동시킬지 여부. 하지만 상단보다 넘치는 경우 아웃라인을 0으로 강제 이동한다. (default: true)
     * @name Grid#useFit
     * @type {$ts:Grid.GridOptions["useFit"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   useFit: true,
     * });
     *
     * grid.useFit = false;
     * ```
     */

    /**
     * Whether to preserve the UI of the existing container or item when destroying.
     * @ko destroy 시 기존 컨테이너, 아이템의 UI를 보존할지 여부.
     * @name Grid#preserveUIOnDestroy
     * @type {$ts:Grid.GridOptions["preserveUIOnDestroy"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   preserveUIOnDestroy: false,
     * });
     *
     * grid.preserveUIOnDestroy = true;
     * ```
     */

    function getColumnPoint(outline, columnIndex, columnCount, pointCaculationName) {
      return Math[pointCaculationName].apply(Math, outline.slice(columnIndex, columnIndex + columnCount));
    }

    function getColumnIndex(outline, columnCount, nearestCalculationName) {
      var length = outline.length - columnCount + 1;
      var pointCaculationName = nearestCalculationName === "max" ? "min" : "max";
      var indexCaculationName = nearestCalculationName === "max" ? "lastIndexOf" : "indexOf";
      var points = range(length).map(function (index) {
        return getColumnPoint(outline, index, columnCount, pointCaculationName);
      });
      return points[indexCaculationName](Math[nearestCalculationName].apply(Math, points));
    }
    /**
     * MasonryGrid is a grid that stacks items with the same width as a stack of bricks. Adjust the width of all images to the same size, find the lowest height column, and insert a new item.
     *
     * @ko MasonryGrid는 벽돌을 쌓아 올린 모양처럼 동일한 너비를 가진 아이템를 쌓는 레이아웃이다. 모든 이미지의 너비를 동일한 크기로 조정하고, 가장 높이가 낮은 열을 찾아 새로운 이미지를 삽입한다. 따라서 배치된 아이템 사이에 빈 공간이 생기지는 않지만 배치된 레이아웃의 아래쪽은 울퉁불퉁해진다.
     * @memberof Grid
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {Grid.MasonryGrid.MasonryGridOptions} options - The option object of the MasonryGrid module <ko>MasonryGrid 모듈의 옵션 객체</ko>
     */


    var MasonryGrid =
    /*#__PURE__*/
    function (_super) {
      __extends$2(MasonryGrid, _super);

      function MasonryGrid() {
        var _this = _super !== null && _super.apply(this, arguments) || this;

        _this._columnSize = 0;
        _this._column = 1;
        return _this;
      }

      var __proto = MasonryGrid.prototype;

      __proto.applyGrid = function (items, direction, outline) {
        this._calculateColumnSize(items);

        this._calculateColumn(items);

        var column = this._column;
        var columnSize = this._columnSize;
        var _a = this.options,
            gap = _a.gap,
            align = _a.align,
            columnSizeRatio = _a.columnSizeRatio,
            columnSizeOption = _a.columnSize;
        var outlineLength = outline.length;
        var itemsLength = items.length;

        var alignPoses = this._getAlignPoses();

        var isEndDirection = direction === "end";
        var nearestCalculationName = isEndDirection ? "min" : "max";
        var pointCalculationName = isEndDirection ? "max" : "min";
        var startOutline = [0];

        if (outlineLength === column) {
          startOutline = outline.slice();
        } else {
          var point_1 = outlineLength ? Math[pointCalculationName].apply(Math, outline) : 0;
          startOutline = range(column).map(function () {
            return point_1;
          });
        }

        var endOutline = startOutline.slice();
        var columnDist = column > 1 ? alignPoses[1] - alignPoses[0] : 0;
        var isStretch = align === "stretch";

        var _loop_1 = function (i) {
          var item = items[isEndDirection ? i : itemsLength - 1 - i];
          var columnAttribute = parseInt(item.attributes.column || "1", 10);
          var maxColumnAttribute = parseInt(item.attributes.maxColumn || "1", 10);
          var inlineSize = item.inlineSize;
          var contentSize = item.contentSize;
          var columnCount = Math.min(column, columnAttribute || Math.max(1, Math.ceil((inlineSize + gap) / columnDist)));
          var maxColumnCount = Math.min(column, Math.max(columnCount, maxColumnAttribute));
          var columnIndex = getColumnIndex(endOutline, columnCount, nearestCalculationName);
          var contentPos = getColumnPoint(endOutline, columnIndex, columnCount, pointCalculationName);

          while (columnCount < maxColumnCount) {
            var nextEndColumnIndex = columnIndex + columnCount;
            var nextColumnIndex = columnIndex - 1;

            if (isEndDirection && (nextEndColumnIndex >= column || endOutline[nextEndColumnIndex] > contentPos)) {
              break;
            }

            if (!isEndDirection && (nextColumnIndex < 0 || endOutline[nextColumnIndex]) < contentPos) {
              break;
            }

            if (!isEndDirection) {
              --columnIndex;
            }

            ++columnCount;
          }

          columnIndex = Math.max(0, columnIndex);
          columnCount = Math.min(column - columnIndex, columnCount);

          if (columnAttribute > 0 && (columnCount > 1 || isStretch || columnSizeOption)) {
            inlineSize = (columnCount - 1) * columnDist + columnSize;
            item.cssInlineSize = inlineSize;
          }

          if (columnSizeRatio > 0) {
            contentSize = inlineSize / columnSizeRatio;
            item.cssContentSize = contentSize;
          }

          var inlinePos = alignPoses[columnIndex];
          contentPos = isEndDirection ? contentPos : contentPos - gap - contentSize;
          item.cssInlinePos = inlinePos;
          item.cssContentPos = contentPos;
          var nextOutlinePoint = isEndDirection ? contentPos + contentSize + gap : contentPos;
          range(columnCount).forEach(function (indexOffset) {
            endOutline[columnIndex + indexOffset] = nextOutlinePoint;
          });
        };

        for (var i = 0; i < itemsLength; ++i) {
          _loop_1(i);
        } // if end items, startOutline is low, endOutline is high
        // if start items, startOutline is high, endOutline is low


        return {
          start: isEndDirection ? startOutline : endOutline,
          end: isEndDirection ? endOutline : startOutline
        };
      };

      __proto._calculateColumnSize = function (items) {
        var _a = this.options,
            columnSizeOption = _a.columnSize,
            gap = _a.gap,
            align = _a.align;

        if (align === "stretch") {
          var column = this.column;

          if (columnSizeOption) {
            column = Math.max(1, Math.floor((this.getContainerInlineSize() + gap) / (columnSizeOption + gap)));
          }

          this._columnSize = (this.getContainerInlineSize() + gap) / (column || 1) - gap;
        } else if (columnSizeOption) {
          this._columnSize = columnSizeOption;
        } else if (items.length) {
          var checkedItem = items[0];

          for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
            var item = items_1[_i];
            var attributes = item.attributes;

            if (item.updateState !== UPDATE_STATE.UPDATED || !item.inlineSize || attributes.column || attributes.maxColumnCount) {
              continue;
            }

            checkedItem = item;
            break;
          }

          var inlineSize = checkedItem.inlineSize || 0;
          this._columnSize = inlineSize;
          return inlineSize;
        }

        this._columnSize = this._columnSize || 0;
        return this._columnSize;
      };

      __proto._calculateColumn = function (items) {
        var _a = this.options,
            gap = _a.gap,
            columnOption = _a.column;
        var columnSize = this._columnSize;
        var column = 1;

        if (columnOption) {
          column = columnOption;
        } else if (!columnSize) {
          column = 1;
        } else {
          column = Math.min(items.length, Math.max(1, Math.floor((this.getContainerInlineSize() + gap) / (columnSize + gap))));
        }

        this._column = column;
        return column;
      };

      __proto._getAlignPoses = function () {
        var columnSize = this._columnSize;
        var column = this._column;
        var _a = this.options,
            align = _a.align,
            gap = _a.gap;
        var containerSize = this.getContainerInlineSize();
        var indexes = range(column);
        var offset = 0;
        var dist = 0;

        if (align === "justify" || align === "stretch") {
          var countDist = column - 1;
          dist = countDist ? Math.max((containerSize - columnSize) / countDist, columnSize + gap) : 0;
          offset = Math.min(0, containerSize / 2 - (countDist * dist + columnSize) / 2);
        } else {
          dist = columnSize + gap;
          var totalColumnSize = (column - 1) * dist + columnSize;

          if (align === "center") {
            offset = (containerSize - totalColumnSize) / 2;
          } else if (align === "end") {
            offset = containerSize - totalColumnSize;
          }
        }

        return indexes.map(function (i) {
          return offset + i * dist;
        });
      };

      MasonryGrid.propertyTypes = __assign$2(__assign$2({}, Grid.propertyTypes), {
        column: PROPERTY_TYPE.RENDER_PROPERTY,
        columnSize: PROPERTY_TYPE.RENDER_PROPERTY,
        columnSizeRatio: PROPERTY_TYPE.RENDER_PROPERTY,
        align: PROPERTY_TYPE.RENDER_PROPERTY
      });
      MasonryGrid.defaultOptions = __assign$2(__assign$2({}, Grid.defaultOptions), {
        align: "justify",
        column: 0,
        columnSize: 0,
        columnSizeRatio: 0
      });
      MasonryGrid = __decorate$1([GetterSetter], MasonryGrid);
      return MasonryGrid;
    }(Grid);
    /**
     * Align of the position of the items. If you want to use `stretch`, be sure to set `column` or `columnSize` option. ("start", "center", "end", "justify", "stretch") (default: "justify")
     * @ko 아이템들의 위치의 정렬. `stretch`를 사용하고 싶다면 `column` 또는 `columnSize` 옵션을 설정해라.  ("start", "center", "end", "justify", "stretch") (default: "justify")
     * @name Grid.MasonryGrid#align
     * @type {$ts:Grid.MasonryGrid.MasonryGridOptions["align"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   align: "start",
     * });
     *
     * grid.align = "justify";
     * ```
     */

    /**
     * The number of columns. If the number of columns is 0, it is automatically calculated according to the size of the container.
     * @ko 열의 개수. 열의 개수가 0이라면, 컨테이너의 사이즈에 의해 계산이 된다. (default: 0)
     * @name Grid.MasonryGrid#column
     * @type {$ts:Grid.MasonryGrid.MasonryGridOptions["column"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   column: 0,
     * });
     *
     * grid.column = 4;
     * ```
     */

    /**
     * The size of the columns. If it is 0, it is calculated as the size of the first item in items. (default: 0)
     * @ko 열의 사이즈. 만약 열의 사이즈가 0이면, 아이템들의 첫번째 아이템의 사이즈로 계산이 된다. (default: 0)
     * @name Grid.MasonryGrid#columnSize
     * @type {$ts:Grid.MasonryGrid.MasonryGridOptions["columnSize"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   columnSize: 0,
     * });
     *
     * grid.columnSize = 200;
     * ```
     */

    /**
     * The size ratio(inlineSize / contentSize) of the columns. 0 is not set. (default: 0)
     * @ko 열의 사이즈 비율(inlineSize / contentSize). 0은 미설정이다.
     * @name Grid.MasonryGrid#columnSizeRatio
     * @type {$ts:Grid.MasonryGrid.MasonryGridOptions["columnSizeRatio"]}
     * @example
     * ```js
     * import { MasonryGrid } from "@egjs/grid";
     *
     * const grid = new MasonryGrid(container, {
     *   columnSizeRatio: 0,
     * });
     *
     * grid.columnSizeRatio = 0.5;
     * ```
     */

    /* eslint-disable */

    /******************************************************************************
     * Created 2008-08-19.
     *
     * Dijkstra path-finding functions. Adapted from the Dijkstar Python project.
     *
     * Copyright (C) 2008
     *   Wyatt Baldwin <self@wyattbaldwin.com>
     *   All rights reserved
     *
     * Licensed under the MIT license.
     *
     *   http://www.opensource.org/licenses/mit-license.php
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     * THE SOFTWARE.
     *****************************************************************************/
    function single_source_shortest_paths(graph, s, d) {
      // Predecessor map for each node that has been encountered.
      // node ID => predecessor node ID
      var predecessors = {}; // Costs of shortest paths from s to all nodes encountered.
      // node ID => cost

      var costs = {};
      costs[s] = 0; // Costs of shortest paths from s to all nodes encountered; differs from
      // `costs` in that it provides easy access to the node that currently has
      // the known shortest path from s.
      // XXX: Do we actually need both `costs` and `open`?

      var open = new BinaryHeap(function (x) {
        return x.cost;
      });
      open.push({
        value: s,
        cost: 0
      });
      var closest;
      var u;
      var cost_of_s_to_u;
      var adjacent_nodes;
      var cost_of_e;
      var cost_of_s_to_u_plus_cost_of_e;
      var cost_of_s_to_v;
      var first_visit;

      while (open.size()) {
        // In the nodes remaining in graph that have a known cost from s,
        // find the node, u, that currently has the shortest path from s.
        closest = open.pop();
        u = closest.value;
        cost_of_s_to_u = closest.cost; // Get nodes adjacent to u...

        adjacent_nodes = graph(u) || {}; // ...and explore the edges that connect u to those nodes, updating
        // the cost of the shortest paths to any or all of those nodes as
        // necessary. v is the node across the current edge from u.

        for (var v in adjacent_nodes) {
          // Get the cost of the edge running from u to v.
          cost_of_e = adjacent_nodes[v]; // Cost of s to u plus the cost of u to v across e--this is *a*
          // cost from s to v that may or may not be less than the current
          // known cost to v.

          cost_of_s_to_u_plus_cost_of_e = cost_of_s_to_u + cost_of_e; // If we haven't visited v yet OR if the current known cost from s to
          // v is greater than the new cost we just found (cost of s to u plus
          // cost of u to v across e), update v's cost in the cost list and
          // update v's predecessor in the predecessor list (it's now u).

          cost_of_s_to_v = costs[v];
          first_visit = typeof costs[v] === "undefined";

          if (first_visit || cost_of_s_to_v > cost_of_s_to_u_plus_cost_of_e) {
            costs[v] = cost_of_s_to_u_plus_cost_of_e;
            open.push({
              value: v,
              cost: cost_of_s_to_u_plus_cost_of_e
            });
            predecessors[v] = u;
          }
        }
      }

      if (typeof costs[d] === "undefined") {
        var msg = ["Could not find a path from ", s, " to ", d, "."].join("");
        throw new Error(msg);
      }

      return predecessors;
    }

    function extract_shortest_path_from_predecessor_list(predecessors, d) {
      var nodes = [];
      var u = d;

      while (u) {
        nodes.push(u);
        u = predecessors[u];
      }

      nodes.reverse();
      return nodes;
    }

    function find_path(graph, s, d) {
      var predecessors = single_source_shortest_paths(graph, s, d);
      return extract_shortest_path_from_predecessor_list(predecessors, d);
    }

    var BinaryHeap =
    /*#__PURE__*/
    function () {
      function BinaryHeap(scoreFunction) {
        this.content = [];
        this.scoreFunction = scoreFunction;
      }

      var __proto = BinaryHeap.prototype;

      __proto.push = function (element) {
        // Add the new element to the end of the array.
        this.content.push(element); // Allow it to bubble up.

        this.bubbleUp(this.content.length - 1);
      };

      __proto.pop = function () {
        // Store the first element so we can return it later.
        var result = this.content[0]; // Get the element at the end of the array.

        var end = this.content.pop(); // If there are any elements left, put the end element at the
        // start, and let it sink down.

        if (this.content.length > 0) {
          this.content[0] = end;
          this.sinkDown(0);
        }

        return result;
      };

      __proto.size = function () {
        return this.content.length;
      };

      __proto.bubbleUp = function (_n) {
        var n = _n; // Fetch the element that has to be moved.

        var element = this.content[n]; // When at 0, an element can not go up any further.

        while (n > 0) {
          // Compute the parent element's index, and fetch it.
          var parentN = Math.floor((n + 1) / 2) - 1;
          var parent = this.content[parentN]; // Swap the elements if the parent is greater.

          if (this.scoreFunction(element) < this.scoreFunction(parent)) {
            this.content[parentN] = element;
            this.content[n] = parent; // Update 'n' to continue at the new position.

            n = parentN;
          } else {
            // Found a parent that is less, no need to move it further.
            break;
          }
        }
      };

      __proto.sinkDown = function (n) {
        // Look up the target element and its score.
        var length = this.content.length;
        var element = this.content[n];
        var elemScore = this.scoreFunction(element);
        var child1Score;

        while (true) {
          // Compute the indices of the child elements.
          var child2N = (n + 1) * 2;
          var child1N = child2N - 1; // This is used to store the new position of the element,
          // if any.

          var swap = null; // If the first child exists (is inside the array)...

          if (child1N < length) {
            // Look it up and compute its score.
            var child1 = this.content[child1N];
            child1Score = this.scoreFunction(child1); // If the score is less than our element's, we need to swap.

            if (child1Score < elemScore) {
              swap = child1N;
            }
          } // Do the same checks for the other child.


          if (child2N < length) {
            var child2 = this.content[child2N];
            var child2Score = this.scoreFunction(child2);

            if (child2Score < (swap == null ? elemScore : child1Score)) {
              swap = child2N;
            }
          } // If the element needs to be moved, swap it, and continue.


          if (swap !== null) {
            this.content[n] = this.content[swap];
            this.content[swap] = element;
            n = swap;
          } else {
            // Otherwise, we are done.
            break;
          }
        }
      };

      return BinaryHeap;
    }();

    function splitItems(items, path) {
      var length = path.length;
      var groups = [];

      for (var i = 0; i < length - 1; ++i) {
        var path1 = parseInt(path[i], 10);
        var path2 = parseInt(path[i + 1], 10);
        groups.push(items.slice(path1, path2));
      }

      return groups;
    }

    function getExpectedColumnSize(item, rowSize) {
      var inlineSize = item.orgInlineSize;
      var contentSize = item.orgContentSize;

      if (!inlineSize || !contentSize) {
        return 0;
      }

      var inlineOffset = parseFloat(item.gridData.inlineOffset) || 0;
      var contentOffset = parseFloat(item.gridData.contentOffset) || 0;
      return (inlineSize - inlineOffset) / (contentSize - contentOffset) * (rowSize - contentOffset) + inlineOffset;
    }
    /**
     * 'justified' is a printing term with the meaning that 'it fits in one row wide'. JustifiedGrid is a grid that the item is filled up on the basis of a line given a size.
     * If 'data-grid-inline-offset' or 'data-grid-content-offset' are set for item element, the ratio is maintained except for the offset value.
     * If 'data-grid-maintained-target' is set for an element whose ratio is to be maintained, the item is rendered while maintaining the ratio of the element.
     * @ko 'justified'는 '1행의 너비에 맞게 꼭 들어찬'이라는 의미를 가진 인쇄 용어다. JustifiedGrid는 용어의 의미대로 너비가 주어진 사이즈를 기준으로 아이템가 가득 차도록 배치하는 Grid다.
     * 아이템 엘리먼트에 'data-grid-inline-offset' 또는 'data-grid-content-offset'를 설정하면 offset 값을 제외하고 비율을 유지한다.
     * 비율을 유지하고 싶은 엘리먼트에 'data-grid-maintained-target'을 설정한다면 해당 엘리먼트의 비율을 유지하면서 아이템이 렌더링이 된다.
     * @memberof Grid
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {Grid.JustifiedGrid.JustifiedGridOptions} options - The option object of the JustifiedGrid module <ko>JustifiedGrid 모듈의 옵션 객체</ko>
     */


    var JustifiedGrid =
    /*#__PURE__*/
    function (_super) {
      __extends$2(JustifiedGrid, _super);

      function JustifiedGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = JustifiedGrid.prototype;

      __proto.applyGrid = function (items, direction, outline) {
        var _a = this.options,
            attributePrefix = _a.attributePrefix,
            horizontal = _a.horizontal;
        items.forEach(function (item) {
          if (!item.isUpdate) {
            return;
          }

          var element = item.element;
          var attributes = item.attributes;
          var gridData = item.gridData;
          var inlineOffset = parseFloat(attributes.inlineOffset) || gridData.inlineOffset || 0;
          var contentOffset = parseFloat(attributes.contentOffset) || gridData.contentOffset | 0;

          if (element && !("inlineOffset" in attributes) && !("contentOffset" in attributes) && item.mountState === MOUNT_STATE.MOUNTED) {
            var maintainedTarget = element.querySelector("[" + attributePrefix + "maintained-target]");

            if (maintainedTarget) {
              var widthOffset = element.offsetWidth - element.clientWidth + element.scrollWidth - maintainedTarget.clientWidth;
              var heightOffset = element.offsetHeight - element.clientHeight + element.scrollHeight - maintainedTarget.clientHeight;

              if (horizontal) {
                inlineOffset = heightOffset;
                contentOffset = widthOffset;
              } else {
                inlineOffset = widthOffset;
                contentOffset = heightOffset;
              }
            }
          }

          gridData.inlineOffset = inlineOffset;
          gridData.contentOffset = contentOffset;
        });
        var rowRange = this.options.rowRange;
        var path = [];

        if (items.length) {
          path = rowRange ? this._getRowPath(items) : this._getPath(items);
        }

        return this._setStyle(items, path, outline, direction === "end");
      };

      __proto._getRowPath = function (items) {
        var _a;

        var columnRange = this._getColumnRange();

        var rowRange = this._getRowRange();

        var pathLink = this._getRowLink(items, {
          path: [0],
          cost: 0,
          length: 0,
          currentNode: 0
        }, columnRange, rowRange);

        return (_a = pathLink === null || pathLink === void 0 ? void 0 : pathLink.path.map(function (node) {
          return "" + node;
        })) !== null && _a !== void 0 ? _a : [];
      };

      __proto._getRowLink = function (items, currentLink, columnRange, rowRange) {
        var minColumn = columnRange[0];
        var minRow = rowRange[0],
            maxRow = rowRange[1];
        var lastNode = items.length;
        var path = currentLink.path,
            pathLength = currentLink.length,
            cost = currentLink.cost,
            currentNode = currentLink.currentNode; // not reached lastNode but path is exceed or the number of remaining nodes is less than minColumn.

        if (currentNode < lastNode && (maxRow <= pathLength || currentNode + minColumn > lastNode)) {
          var rangeCost = getRangeCost(lastNode - currentNode, columnRange);
          var lastCost = rangeCost * Math.abs(this._getCost(items, currentNode, lastNode));
          return __assign$2(__assign$2({}, currentLink), {
            length: pathLength + 1,
            path: __spreadArrays$2(path, [lastNode]),
            currentNode: lastNode,
            cost: cost + lastCost,
            isOver: true
          });
        } else if (currentNode >= lastNode) {
          return __assign$2(__assign$2({}, currentLink), {
            currentNode: lastNode,
            isOver: minRow > pathLength || maxRow < pathLength
          });
        } else {
          return this._searchRowLink(items, currentLink, lastNode, columnRange, rowRange);
        }
      };

      __proto._searchRowLink = function (items, currentLink, lastNode, columnRange, rowRange) {
        var minColumn = columnRange[0],
            maxColumn = columnRange[1];
        var currentNode = currentLink.currentNode,
            path = currentLink.path,
            pathLength = currentLink.length,
            cost = currentLink.cost;
        var length = Math.min(lastNode, currentNode + maxColumn);
        var links = [];

        for (var nextNode = currentNode + minColumn; nextNode <= length; ++nextNode) {
          if (nextNode === currentNode) {
            continue;
          }

          var nextCost = Math.abs(this._getCost(items, currentNode, nextNode));

          var nextLink = this._getRowLink(items, {
            path: __spreadArrays$2(path, [nextNode]),
            length: pathLength + 1,
            cost: cost + nextCost,
            currentNode: nextNode
          }, columnRange, rowRange);

          if (nextLink) {
            links.push(nextLink);
          }
        }

        links.sort(function (a, b) {
          var aIsOver = a.isOver;
          var bIsOver = b.isOver;

          if (aIsOver !== bIsOver) {
            // If it is over, the cost is high.
            return aIsOver ? 1 : -1;
          }

          var aRangeCost = getRangeCost(a.length, rowRange);
          var bRangeCost = getRangeCost(b.length, rowRange);
          return aRangeCost - bRangeCost || a.cost - b.cost;
        }); // It returns the lowest cost link.

        return links[0];
      };

      __proto._getExpectedRowSize = function (items) {
        var gap = this.options.gap;
        var containerInlineSize = this.getContainerInlineSize() - gap * (items.length - 1);
        var ratioSum = 0;
        var inlineSum = 0;
        items.forEach(function (item) {
          var inlineSize = item.orgInlineSize;
          var contentSize = item.orgContentSize;

          if (!inlineSize || !contentSize) {
            return;
          } // sum((expect - offset) * ratio) = container inline size


          var inlineOffset = parseFloat(item.gridData.inlineOffset) || 0;
          var contentOffset = parseFloat(item.gridData.contentOffset) || 0;
          var maintainedRatio = (inlineSize - inlineOffset) / (contentSize - contentOffset);
          ratioSum += maintainedRatio;
          inlineSum += contentOffset * maintainedRatio;
          containerInlineSize -= inlineOffset;
        });
        return ratioSum ? (containerInlineSize + inlineSum) / ratioSum : 0;
      };

      __proto._getExpectedInlineSize = function (items, rowSize) {
        var gap = this.options.gap;
        var size = items.reduce(function (sum, item) {
          return sum + getExpectedColumnSize(item, rowSize);
        }, 0);
        return size ? size + gap * (items.length - 1) : 0;
      };

      __proto._getCost = function (items, i, j) {
        var lineItems = items.slice(i, j);

        var rowSize = this._getExpectedRowSize(lineItems);

        var _a = this._getSizeRange(),
            minSize = _a[0],
            maxSize = _a[1];

        if (this.isCroppedSize) {
          if (minSize <= rowSize && rowSize <= maxSize) {
            return 0;
          }

          var expectedInlineSize = this._getExpectedInlineSize(lineItems, rowSize < minSize ? minSize : maxSize);

          return Math.pow(expectedInlineSize - this.getContainerInlineSize(), 2);
        }

        if (isFinite(maxSize)) {
          // if this size is not in range, the cost increases sharply.
          if (rowSize < minSize) {
            return Math.pow(rowSize - minSize, 2) + Math.pow(maxSize, 2);
          } else if (rowSize > maxSize) {
            return Math.pow(rowSize - maxSize, 2) + Math.pow(maxSize, 2);
          }
        } else if (rowSize < minSize) {
          return Math.max(Math.pow(minSize, 2), Math.pow(rowSize, 2)) + Math.pow(maxSize, 2);
        } // if this size in range, the cost is row


        return rowSize - minSize;
      };

      __proto._getPath = function (items) {
        var _this = this;

        var lastNode = items.length;
        var columnRangeOption = this.options.columnRange;

        var _a = isObject(columnRangeOption) ? columnRangeOption : [columnRangeOption, columnRangeOption],
            minColumn = _a[0],
            maxColumn = _a[1];

        var graph = function (nodeKey) {
          var results = {};
          var currentNode = parseInt(nodeKey, 10);

          for (var nextNode = Math.min(currentNode + minColumn, lastNode); nextNode <= lastNode; ++nextNode) {
            if (nextNode - currentNode > maxColumn) {
              break;
            }

            var cost = _this._getCost(items, currentNode, nextNode);

            if (cost < 0 && nextNode === lastNode) {
              cost = 0;
            }

            results["" + nextNode] = Math.pow(cost, 2);
          }

          return results;
        }; // shortest path for items' total height.


        return find_path(graph, "0", "" + lastNode);
      };

      __proto._setStyle = function (items, path, outline, isEndDirection) {
        var _this = this;

        if (outline === void 0) {
          outline = [];
        }

        var _a = this.options,
            gap = _a.gap,
            isCroppedSize = _a.isCroppedSize,
            displayedRow = _a.displayedRow;

        var sizeRange = this._getSizeRange();

        var startPoint = outline[0] || 0;
        var containerInlineSize = this.getContainerInlineSize();
        var groups = splitItems(items, path);
        var contentPos = startPoint;
        var displayedSize = 0;
        groups.forEach(function (groupItems, rowIndex) {
          var length = groupItems.length;

          var rowSize = _this._getExpectedRowSize(groupItems);

          if (isCroppedSize) {
            rowSize = Math.max(sizeRange[0], Math.min(rowSize, sizeRange[1]));
          }

          var expectedInlineSize = _this._getExpectedInlineSize(groupItems, rowSize);

          var allGap = gap * (length - 1);
          var scale = (containerInlineSize - allGap) / (expectedInlineSize - allGap);
          groupItems.forEach(function (item, i) {
            var columnSize = getExpectedColumnSize(item, rowSize);
            var prevItem = groupItems[i - 1];
            var inlinePos = prevItem ? prevItem.cssInlinePos + prevItem.cssInlineSize + gap : 0;

            if (isCroppedSize) {
              columnSize *= scale;
            }

            item.setCSSGridRect({
              inlinePos: inlinePos,
              contentPos: contentPos,
              inlineSize: columnSize,
              contentSize: rowSize
            });
          });
          contentPos += gap + rowSize;

          if (displayedRow < 0 || rowIndex < displayedRow) {
            displayedSize = contentPos;
          }
        });

        if (isEndDirection) {
          // previous group's end outline is current group's start outline
          return {
            start: [startPoint],
            end: [displayedSize]
          };
        } // always start is lower than end.
        // contentPos is endPoinnt


        var height = contentPos - startPoint;
        items.forEach(function (item) {
          item.cssContentPos -= height;
        });
        return {
          start: [startPoint - height],
          end: [startPoint]
        };
      };

      __proto._getRowRange = function () {
        var rowRange = this.rowRange;
        return isObject(rowRange) ? rowRange : [rowRange, rowRange];
      };

      __proto._getColumnRange = function () {
        var columnRange = this.columnRange;
        return isObject(columnRange) ? columnRange : [columnRange, columnRange];
      };

      __proto._getSizeRange = function () {
        var sizeRange = this.sizeRange;
        return isObject(sizeRange) ? sizeRange : [sizeRange, sizeRange];
      };

      JustifiedGrid.propertyTypes = __assign$2(__assign$2({}, Grid.propertyTypes), {
        columnRange: PROPERTY_TYPE.RENDER_PROPERTY,
        rowRange: PROPERTY_TYPE.RENDER_PROPERTY,
        sizeRange: PROPERTY_TYPE.RENDER_PROPERTY,
        isCroppedSize: PROPERTY_TYPE.RENDER_PROPERTY,
        displayedRow: PROPERTY_TYPE.RENDER_PROPERTY
      });
      JustifiedGrid.defaultOptions = __assign$2(__assign$2({}, Grid.defaultOptions), {
        columnRange: [1, 8],
        rowRange: 0,
        sizeRange: [0, Infinity],
        displayedRow: -1,
        isCroppedSize: false
      });
      JustifiedGrid = __decorate$1([GetterSetter], JustifiedGrid);
      return JustifiedGrid;
    }(Grid);
    /**
     * The minimum and maximum number of items per line. (default: [1, 8])
     * @ko 한 줄에 들어가는 아이템의 최소, 최대 개수. (default: [1, 8])
     * @name Grid.JustifiedGrid#columnRange
     * @type {$ts:Grid.JustifiedGrid.JustifiedGridOptions["columnRange"]}
     * @example
     * ```js
     * import { JustifiedGrid } from "@egjs/grid";
     *
     * const grid = new JustifiedGrid(container, {
     *   columnRange: [1, 8],
     * });
     *
     * grid.columnRange = [3, 6];
     * ```
     */

    /**
     * The minimum and maximum number of rows in a group, 0 is not set. (default: 0)
     * @ko 한 그룹에 들어가는 행의 최소, 최대 개수, 0은 미설정이다. (default: 0)
     * @name Grid.JustifiedGrid#rowRange
     * @type {$ts:Grid.JustifiedGrid.JustifiedGridOptions["rowRange"]}
     * @example
     * ```js
     * import { JustifiedGrid } from "@egjs/grid";
     *
     * const grid = new JustifiedGrid(container, {
     *   rowRange: 0,
     * });
     *
     * grid.rowRange = [3, 4];
     * ```
     */

    /**
     * The minimum and maximum size by which the item is adjusted. If it is not calculated, it may deviate from the minimum and maximum sizes. (default: [0, Infinity])
     * @ko 아이템이 조정되는 최소, 최대 사이즈. 계산이 되지 않는 경우 최소, 최대 사이즈를 벗어날 수 있다. (default: [0, Infinity])
     * @name Grid.JustifiedGrid#sizeRange
     * @type {$ts:Grid.JustifiedGrid.JustifiedGridOptions["sizeRange"]}
     * @example
     * ```js
     * import { JustifiedGrid } from "@egjs/grid";
     *
     * const grid = new JustifiedGrid(container, {
     *   sizeRange: [0, Infinity],
     * });
     *
     * grid.sizeRange = [200, 800];
     * ```
     */

    /**
     * Maximum number of rows to be counted for container size. You can hide it on the screen by setting overflow: hidden. -1 is not set. (default: -1)
     * @ko - 컨테이너 크기에 계산될 최대 row 개수. overflow: hidden을 설정하면 화면에 가릴 수 있다. -1은 미설정이다. (default: -1)
     * @name Grid.JustifiedGrid#displayedRow
     * @type {$ts:Grid.JustifiedGrid.JustifiedGridOptions["displayedRow"]}
     * @example
     * ```js
     * import { JustifiedGrid } from "@egjs/grid";
     *
     * const grid = new JustifiedGrid(container, {
     *   displayedRow: -1,
     * });
     *
     * grid.displayedRow = 3;
     * ```
     */

    /**
     * Whether to crop when the row size is out of sizeRange. If set to true, this ratio can be broken. (default: false)
     * @ko - row 사이즈가 sizeRange에 벗어나면 크롭할지 여부. true로 설정하면 비율이 깨질 수 있다. (default: false)
     * @name Grid.JustifiedGrid#isCroppedSize
     * @type {$ts:Grid.JustifiedGrid.JustifiedGridOptions["isCroppedSize"]}
     * @example
     * ```js
     * import { JustifiedGrid } from "@egjs/grid";
     *
     * const grid = new JustifiedGrid(container, {
     *   sizeRange: [200, 250],
     *   isCroppedSize: false,
     * });
     *
     * grid.isCroppedSize = true;
     * ```
     */

    function getMaxPoint(outline) {
      var maxPoint = -Infinity;
      outline.forEach(function (point) {
        if (isFinite(point)) {
          maxPoint = Math.max(maxPoint, point);
        }
      });
      return isFinite(maxPoint) ? maxPoint : 0;
    }

    function getMinPoint(outline) {
      var minPoint = Infinity;
      outline.forEach(function (point) {
        if (isFinite(point)) {
          minPoint = Math.min(minPoint, point);
        }
      });
      return isFinite(minPoint) ? minPoint : 0;
    }

    function getOutlinePoint(startOutline, frameOutline, useFrameFill) {
      return getMaxPoint(startOutline) + getOutlineDist(startOutline, frameOutline, useFrameFill);
    }

    function getOutlineDist(startOutline, endOutline, useFrameFill) {
      var length = startOutline.length;

      if (!length) {
        return 0;
      }

      var minEndPoint = getMinPoint(endOutline);
      var maxStartPoint = getMaxPoint(startOutline);
      var frameDist = 0;

      if (!useFrameFill) {
        return 0;
      }

      for (var outlineIndex = 0; outlineIndex < length; ++outlineIndex) {
        var startPoint = startOutline[outlineIndex];
        var endPoint = endOutline[outlineIndex];

        if (!isFinite(startPoint) || !isFinite(endPoint)) {
          continue;
        }

        var startPos = startPoint - maxStartPoint;
        var endPos = endPoint - minEndPoint; // Fill empty block.

        frameDist = outlineIndex ? Math.max(frameDist, frameDist + startPos - endPos) : startPos - endPos;
      }

      return frameDist;
    }

    function fillOutlines(startOutline, endOutline, rect) {
      var inlinePos = rect.inlinePos,
          inlineSize = rect.inlineSize,
          contentPos = rect.contentPos,
          contentSize = rect.contentSize;

      for (var outlineIndex = inlinePos; outlineIndex < inlinePos + inlineSize; ++outlineIndex) {
        startOutline[outlineIndex] = Math.min(startOutline[outlineIndex], contentPos);
        endOutline[outlineIndex] = Math.max(endOutline[outlineIndex], contentPos + contentSize);
      }
    }
    /**
     * 'Frame' is a printing term with the meaning that 'it fits in one row wide'. FrameGrid is a grid that the item is filled up on the basis of a line given a size.
     * @ko 'Frame'는 '1행의 너비에 맞게 꼭 들어찬'이라는 의미를 가진 인쇄 용어다. FrameGrid는 용어의 의미대로 너비가 주어진 사이즈를 기준으로 아이템이 가득 차도록 배치하는 Grid다.
     * @memberof Grid
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {Grid.FrameGrid.FrameGridOptions} options - The option object of the FrameGrid module <ko>FrameGrid 모듈의 옵션 객체</ko>
     */


    var FrameGrid =
    /*#__PURE__*/
    function (_super) {
      __extends$2(FrameGrid, _super);

      function FrameGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = FrameGrid.prototype;

      __proto.applyGrid = function (items, direction, outline) {
        var frame = this._getFrame();

        var frameInlineSize = frame.inlineSize,
            frameContentSize = frame.contentSize,
            frameRects = frame.rects;
        var _a = this.options,
            gap = _a.gap,
            useFrameFill = _a.useFrameFill;

        var _b = this.getRectSize(frameInlineSize),
            rectInlineSize = _b.inlineSize,
            rectContentSize = _b.contentSize;

        var itemsLength = items.length;

        if (!itemsLength || !frameInlineSize || !frameContentSize) {
          return {
            start: outline,
            end: outline
          };
        }

        var rectsLength = frameRects.length;
        var startOutline = range(frameInlineSize).map(function () {
          return Infinity;
        });
        var endOutline = range(frameInlineSize).map(function () {
          return -Infinity;
        });
        var frameOutline = frame.outline.map(function (point) {
          return point * (rectContentSize + gap);
        });

        for (var startIndex = 0; startIndex < itemsLength; startIndex += rectsLength) {
          // Compare group's startOutline and startOutline of rect
          var startPoint = getOutlinePoint(endOutline, frameOutline, useFrameFill);

          for (var rectIndex = 0; rectIndex < rectsLength && startIndex + rectIndex < itemsLength; ++rectIndex) {
            var item = items[startIndex + rectIndex];
            var _c = frameRects[rectIndex],
                frameRectContentPos = _c.contentPos,
                frameRectInlinePos = _c.inlinePos,
                frameRectContentSize = _c.contentSize,
                frameRectInlineSize = _c.inlineSize;
            var contentPos = startPoint + frameRectContentPos * (rectContentSize + gap);
            var inlinePos = frameRectInlinePos * (rectInlineSize + gap);
            var contentSize = frameRectContentSize * (rectContentSize + gap) - gap;
            var inlineSize = frameRectInlineSize * (rectInlineSize + gap) - gap;
            fillOutlines(startOutline, endOutline, {
              inlinePos: frameRectInlinePos,
              inlineSize: frameRectInlineSize,
              contentPos: contentPos,
              contentSize: contentSize + gap
            });
            item.setCSSGridRect({
              inlinePos: inlinePos,
              contentPos: contentPos,
              inlineSize: inlineSize,
              contentSize: contentSize
            });
          }
        }

        var isDirectionEnd = direction === "end";
        var gridOutline = outline.length ? outline : [0];

        if (gridOutline.length !== frameInlineSize) {
          var point_1 = isDirectionEnd ? Math.max.apply(Math, gridOutline) : Math.min.apply(Math, gridOutline);
          gridOutline = range(frameInlineSize).map(function () {
            return point_1;
          });
        }

        startOutline = startOutline.map(function (point) {
          return isFinite(point) ? point : 0;
        });
        endOutline = endOutline.map(function (point) {
          return isFinite(point) ? point : 0;
        });
        var outlineDist = isDirectionEnd ? getOutlinePoint(gridOutline, startOutline, useFrameFill) : getOutlinePoint(endOutline, gridOutline, useFrameFill);
        items.forEach(function (item) {
          item.cssContentPos += outlineDist;
        });
        return {
          start: startOutline.map(function (point) {
            return point + outlineDist;
          }),
          end: endOutline.map(function (point) {
            return point + outlineDist;
          })
        };
      };

      __proto.getRectSize = function (frameInlineSize) {
        var _a = this.options,
            gap = _a.gap,
            rectSizeOption = _a.rectSize;

        if (typeof rectSizeOption === "object") {
          return rectSizeOption;
        }

        var rectSizeValue = rectSizeOption ? rectSizeOption : (this.getContainerInlineSize() + gap) / frameInlineSize - gap;
        return {
          inlineSize: rectSizeValue,
          contentSize: rectSizeValue
        };
      };

      __proto._getFrame = function () {
        var frame = this.options.frame;
        var frameContentSize = frame.length;
        var frameInlineSize = frameContentSize ? frame[0].length : 0;
        var rects = [];
        var passMap = {};
        var startOutline = range(frameInlineSize).map(function () {
          return Infinity;
        });
        var endOutline = range(frameInlineSize).map(function () {
          return -Infinity;
        });

        for (var y1 = 0; y1 < frameContentSize; ++y1) {
          for (var x1 = 0; x1 < frameInlineSize; ++x1) {
            var type = frame[y1][x1];

            if (!type) {
              continue;
            }

            if (passMap[y1 + "," + x1]) {
              continue;
            }

            var rect = this._findRect(passMap, type, y1, x1, frameInlineSize, frameContentSize);

            fillOutlines(startOutline, endOutline, rect);
            rects.push(rect);
          }
        }

        rects.sort(function (a, b) {
          return a.type < b.type ? -1 : 1;
        });
        return {
          rects: rects,
          inlineSize: frameInlineSize,
          contentSize: frameContentSize,
          outline: startOutline
        };
      };

      __proto._findRect = function (passMap, type, y1, x1, frameInlineSize, frameContentSize) {
        var frame = this.options.frame;
        var contentSize = 1;
        var inlineSize = 1; // find rect

        for (var x2 = x1; x2 < frameInlineSize; ++x2) {
          if (frame[y1][x2] === type) {
            inlineSize = x2 - x1 + 1;
            continue;
          }

          break;
        }

        for (var y2 = y1; y2 < frameContentSize; ++y2) {
          if (frame[y2][x1] === type) {
            contentSize = y2 - y1 + 1;
            continue;
          }

          break;
        } // pass rect


        for (var y = y1; y < y1 + contentSize; ++y) {
          for (var x = x1; x < x1 + inlineSize; ++x) {
            passMap[y + "," + x] = true;
          }
        }

        var rect = {
          type: type,
          inlinePos: x1,
          contentPos: y1,
          inlineSize: inlineSize,
          contentSize: contentSize
        };
        return rect;
      };

      FrameGrid.propertyTypes = __assign$2(__assign$2({}, Grid.propertyTypes), {
        frame: PROPERTY_TYPE.RENDER_PROPERTY,
        useFrameFill: PROPERTY_TYPE.RENDER_PROPERTY,
        rectSize: PROPERTY_TYPE.RENDER_PROPERTY
      });
      FrameGrid.defaultOptions = __assign$2(__assign$2({}, Grid.defaultOptions), {
        frame: [],
        rectSize: 0,
        useFrameFill: true
      });
      FrameGrid = __decorate$1([GetterSetter], FrameGrid);
      return FrameGrid;
    }(Grid);
    /**
     * The shape of the grid. You can set the shape and order of items with a 2d array ([contentPos][inlinePos]). You can place items as many times as you fill the array with numbers, and zeros and spaces are empty spaces. The order of the items is arranged in ascending order of the numeric values that fill the array. (default: [])
     * @ko Grid의 모양. 2d 배열([contentPos][inlinePos])로 아이템의 모양과 순서를 설정할 수 있다. 숫자로 배열을 채운만큼 아이템을 배치할 수 있으며 0과 공백은 빈 공간이다. 아이템들의 순서는 배열을 채운 숫자값의 오름차순대로 배치가 된다. (default: [])
     * @name Grid.FrameGrid#frame
     * @type {$ts:Grid.FrameGrid.FrameGridOptions["frame"]}
     * @example
     * ```js
     * import { FrameGrid } from "@egjs/grid";
     *
     * // Item 1 : 2 x 2
     * // Item 2 : 1 x 1
     * // Item 3 : 1 x 2
     * // Item 4 : 1 x 1
     * // Item 5 : 2 x 1
     * const grid = new FrameGrid(container, {
     *   frame: [
     *     [1, 1, 0, 0, 2, 3],
     *     [1, 1, 0, 4, 5, 5],
     *   ],
     * });
     *
     * // Item 1 : 2 x 2
     * // Item 2 : 2 x 2
     * grid.frame = [
     *   [1, 1, 0, 0, 2, 2],
     *   [1, 1, 0, 0, 2, 2],
     * ];
     * ```
     */

    /**
     * Make sure that the frame can be attached after the previous frame. (default: true)
     * @ko 다음 프레임이 전 프레임에 이어 붙일 수 있는지 있는지 확인한다. (default: true)
     * @name Grid.FrameGrid#useFrameFill
     * @type {$ts:Grid.FrameGrid.FrameGridOptions["useFrameFill"]}
     * @example
     * ```js
     * import { FrameGrid } from "@egjs/grid";
     *
     * const grid = new FrameGrid(container, {
     *   useFrameFill: true,
     * });
     *
     * grid.useFrameFill = false;
     * ```
     */

    /**
     * 1x1 rect size. If it is 0, it is determined by the number of columns in the frame. (default: 0)
     * @ko 1x1 직사각형 크기. 0이면 frame의 column의 개수에 의해 결정된다. (default: 0)
     * @name Grid.FrameGrid#rectSize
     * @type {$ts:Grid.FrameGrid.FrameGridOptions["rectSize"]}
     * @example
     * ```js
     * import { FrameGrid } from "@egjs/grid";
     *
     * const grid = new FrameGrid(container, {
     *   rectSize: 0,
     * });
     *
     * grid.rectSize = { inlineSize: 100, contentSize: 150 };
     * ```
     */

    var BoxModel =
    /*#__PURE__*/
    function () {
      function BoxModel(status) {
        var boxStatus = __assign$2({
          orgInlineSize: 0,
          orgContentSize: 0,
          inlineSize: 0,
          contentSize: 0,
          inlinePos: 0,
          contentPos: 0,
          items: []
        }, status);

        for (var name in boxStatus) {
          this[name] = boxStatus[name];
        }
      }

      var __proto = BoxModel.prototype;

      __proto.scaleTo = function (inlineSize, contentSize) {
        var scaleX = this.inlineSize ? inlineSize / this.inlineSize : 0;
        var scaleY = this.contentSize ? contentSize / this.contentSize : 0;
        this.items.forEach(function (item) {
          if (scaleX !== 0) {
            item.inlinePos *= scaleX;
            item.inlineSize *= scaleX;
          }

          if (scaleY !== 0) {
            item.contentPos *= scaleY;
            item.contentSize *= scaleY;
          }
        });
        this.inlineSize = inlineSize;
        this.contentSize = contentSize;
      };

      __proto.push = function (item) {
        this.items.push(item);
      };

      __proto.getOrgSizeWeight = function () {
        return this.orgInlineSize * this.orgContentSize;
      };

      __proto.getSize = function () {
        return this.inlineSize * this.contentSize;
      };

      __proto.getOrgRatio = function () {
        return this.orgContentSize === 0 ? 0 : this.orgInlineSize / this.orgContentSize;
      };

      __proto.getRatio = function () {
        return this.contentSize === 0 ? 0 : this.inlineSize / this.contentSize;
      };

      return BoxModel;
    }();

    function getCost(originLength, length) {
      var cost = originLength / length;

      if (cost < 1) {
        cost = 1 / cost;
      }

      return cost - 1;
    }

    function fitArea(item, bestFitArea, itemFitSize, containerFitSize, isContentDirection) {
      item.contentSize = itemFitSize.contentSize;
      item.inlineSize = itemFitSize.inlineSize;
      bestFitArea.contentSize = containerFitSize.contentSize;
      bestFitArea.inlineSize = containerFitSize.inlineSize;

      if (isContentDirection) {
        item.contentPos = bestFitArea.contentPos + bestFitArea.contentSize;
        item.inlinePos = bestFitArea.inlinePos;
      } else {
        item.inlinePos = bestFitArea.inlinePos + bestFitArea.inlineSize;
        item.contentPos = bestFitArea.contentPos;
      }
    }
    /**
     * The PackingGrid is a grid that shows the important items bigger without sacrificing the weight of the items.
     * Rows and columns are separated so that items are dynamically placed within the horizontal and vertical space rather than arranged in an orderly fashion.
     * If `sizeWeight` is higher than `ratioWeight`, the size of items is preserved as much as possible.
     * Conversely, if `ratioWeight` is higher than `sizeWeight`, the ratio of items is preserved as much as possible.
     * @ko PackingGrid는 아이템의 본래 크기에 따른 비중을 해치지 않으면서 중요한 카드는 더 크게 보여 주는 레이아웃이다.
     * 행과 열이 구분돼 아이템을 정돈되게 배치하는 대신 가로세로 일정 공간 내에서 동적으로 아이템을 배치한다.
     * `sizeWeight`가 `ratioWeight`보다 높으면 아이템들의 size가 최대한 보존이 된다.
     * 반대로 `ratioWeight`가 `sizeWeight`보다 높으면 아이템들의 비율이 최대한 보존이 된다.
     * @memberof Grid
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {Grid.PackingGrid.PackingGridOptions} options - The option object of the PackingGrid module <ko>PackingGrid 모듈의 옵션 객체</ko>
     */


    var PackingGrid =
    /*#__PURE__*/
    function (_super) {
      __extends$2(PackingGrid, _super);

      function PackingGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = PackingGrid.prototype;

      __proto.applyGrid = function (items, direction, outline) {
        var _this = this;

        var _a = this.options,
            aspectRatio = _a.aspectRatio,
            gap = _a.gap;
        var containerInlineSize = this.getContainerInlineSize();
        var containerContentSize = containerInlineSize / aspectRatio;
        var prevOutline = outline.length ? outline : [0];
        var startPoint = direction === "end" ? Math.max.apply(Math, prevOutline) : Math.min.apply(Math, prevOutline) - containerContentSize - gap;
        var endPoint = startPoint + containerContentSize + gap;
        var container = new BoxModel({});
        items.forEach(function (item) {
          var model = new BoxModel({
            inlineSize: item.orgInlineSize,
            contentSize: item.orgContentSize,
            orgInlineSize: item.orgInlineSize,
            orgContentSize: item.orgContentSize
          });

          _this._findBestFitArea(container, model);

          container.push(model);
          container.scaleTo(containerInlineSize + gap, containerContentSize + gap);
        });
        items.forEach(function (item, i) {
          var boxItem = container.items[i];
          var inlineSize = boxItem.inlineSize - gap;
          var contentSize = boxItem.contentSize - gap;
          var contentPos = startPoint + boxItem.contentPos;
          var inlinePos = boxItem.inlinePos;
          item.setCSSGridRect({
            inlinePos: inlinePos,
            contentPos: contentPos,
            inlineSize: inlineSize,
            contentSize: contentSize
          });
        });
        return {
          start: [startPoint],
          end: [endPoint]
        };
      };

      __proto._findBestFitArea = function (container, item) {
        if (container.getRatio() === 0) {
          // 아이템 최초 삽입시 전체영역 지정
          container.orgInlineSize = item.inlineSize;
          container.orgContentSize = item.contentSize;
          container.inlineSize = item.inlineSize;
          container.contentSize = item.contentSize;
          return;
        }

        var bestFitArea;
        var minCost = Infinity;
        var isContentDirection = false;
        var itemFitSize = {
          inlineSize: 0,
          contentSize: 0
        };
        var containerFitSize = {
          inlineSize: 0,
          contentSize: 0
        };

        var sizeWeight = this._getWeight("size");

        var ratioWeight = this._getWeight("ratio");

        container.items.forEach(function (child) {
          var containerSizeCost = getCost(child.getOrgSizeWeight(), child.getSize()) * sizeWeight;
          var containerRatioCost = getCost(child.getOrgRatio(), child.getRatio()) * ratioWeight;
          var inlineSize = child.inlineSize;
          var contentSize = child.contentSize;

          for (var i = 0; i < 2; ++i) {
            var itemInlineSize = void 0;
            var itemContentSize = void 0;
            var containerInlineSize = void 0;
            var containerContentSize = void 0;

            if (i === 0) {
              // add item to content pos (top, bottom)
              itemInlineSize = inlineSize;
              itemContentSize = contentSize * (item.contentSize / (child.orgContentSize + item.contentSize));
              containerInlineSize = inlineSize;
              containerContentSize = contentSize - itemContentSize;
            } else {
              // add item to inline pos (left, right)
              itemContentSize = contentSize;
              itemInlineSize = inlineSize * (item.inlineSize / (child.orgInlineSize + item.inlineSize));
              containerContentSize = contentSize;
              containerInlineSize = inlineSize - itemInlineSize;
            }

            var itemSize = itemInlineSize * itemContentSize;
            var itemRatio = itemInlineSize / itemContentSize;
            var containerSize = containerInlineSize * containerContentSize;
            var containerRatio = containerContentSize / containerContentSize;
            var cost = getCost(item.getSize(), itemSize) * sizeWeight;
            cost += getCost(item.getRatio(), itemRatio) * ratioWeight;
            cost += getCost(child.getOrgSizeWeight(), containerSize) * sizeWeight - containerSizeCost;
            cost += getCost(child.getOrgRatio(), containerRatio) * ratioWeight - containerRatioCost;

            if (cost === Math.min(cost, minCost)) {
              minCost = cost;
              bestFitArea = child;
              isContentDirection = i === 0;
              itemFitSize.inlineSize = itemInlineSize;
              itemFitSize.contentSize = itemContentSize;
              containerFitSize.inlineSize = containerInlineSize;
              containerFitSize.contentSize = containerContentSize;
            }
          }
        });
        fitArea(item, bestFitArea, itemFitSize, containerFitSize, isContentDirection);
      };

      __proto._getWeight = function (type) {
        var options = this.options;
        var weightPriority = options.weightPriority;

        if (weightPriority === type) {
          return 100;
        } else if (weightPriority === "custom") {
          return options[type + "Weight"];
        }

        return 1;
      };

      PackingGrid.propertyTypes = __assign$2(__assign$2({}, Grid.propertyTypes), {
        aspectRatio: PROPERTY_TYPE.RENDER_PROPERTY,
        sizeWeight: PROPERTY_TYPE.RENDER_PROPERTY,
        ratioWeight: PROPERTY_TYPE.RENDER_PROPERTY,
        weightPriority: PROPERTY_TYPE.RENDER_PROPERTY
      });
      PackingGrid.defaultOptions = __assign$2(__assign$2({}, Grid.defaultOptions), {
        aspectRatio: 1,
        sizeWeight: 1,
        ratioWeight: 1,
        weightPriority: "custom"
      });
      PackingGrid = __decorate$1([GetterSetter], PackingGrid);
      return PackingGrid;
    }(Grid);

    var ua$1 = typeof window !== "undefined" ? window.navigator.userAgent : "";
    var IS_IOS = /iPhone|iPad/.test(ua$1);
    var CONTAINER_CLASS_NAME = "infinitegrid-container";
    var IGNORE_PROPERITES_MAP = {
      renderOnPropertyChange: true,
      useFit: true,
      autoResize: true
    };
    var INFINITEGRID_PROPERTY_TYPES = __assign({}, GRID_PROPERTY_TYPES);
    var DIRECTION = {
      START: "start",
      END: "end",
      NONE: ""
    };
    var INFINITEGRID_EVENTS = {
      CHANGE_SCROLL: "changeScroll",
      REQUEST_APPEND: "requestAppend",
      REQUEST_PREPEND: "requestPrepend",
      RENDER_COMPLETE: "renderComplete",
      CONTENT_ERROR: "contentError"
    }; // type?: ITEM_TYPE;
    // groupKey?: string | number;
    // key?: string | number;
    // element?: HTMLElement | null;
    // html?: string;
    // data?: Record<string, any>;

    var ITEM_INFO_PROPERTIES = {
      type: true,
      groupKey: true,
      key: true,
      element: true,
      html: true,
      data: true
    };
    var INFINITEGRID_METHODS = ["updateItems", "getItems", "getVisibleItems", "getGroups", "getVisibleGroups", "renderItems", "getContainerElement", "getScrollContainerElement", "getWrapperElement", "setStatus", "getStatus", "removePlaceholders", "prependPlaceholders", "appendPlaceholders", "getStartCursor", "getEndCursor", "setCursors"];
    var GROUP_TYPE;

    (function (GROUP_TYPE) {
      GROUP_TYPE[GROUP_TYPE["NORMAL"] = 0] = "NORMAL";
      GROUP_TYPE[GROUP_TYPE["VIRTUAL"] = 1] = "VIRTUAL";
      GROUP_TYPE[GROUP_TYPE["LOADING"] = 2] = "LOADING";
    })(GROUP_TYPE || (GROUP_TYPE = {}));

    var ITEM_TYPE;

    (function (ITEM_TYPE) {
      ITEM_TYPE[ITEM_TYPE["NORMAL"] = 0] = "NORMAL";
      ITEM_TYPE[ITEM_TYPE["VIRTUAL"] = 1] = "VIRTUAL";
      ITEM_TYPE[ITEM_TYPE["LOADING"] = 2] = "LOADING";
    })(ITEM_TYPE || (ITEM_TYPE = {}));

    var STATUS_TYPE;

    (function (STATUS_TYPE) {
      // does not remove anything.
      STATUS_TYPE[STATUS_TYPE["NOT_REMOVE"] = 0] = "NOT_REMOVE"; // Minimize information on invisible items

      STATUS_TYPE[STATUS_TYPE["MINIMIZE_INVISIBLE_ITEMS"] = 1] = "MINIMIZE_INVISIBLE_ITEMS"; // Minimize information on invisible groups

      STATUS_TYPE[STATUS_TYPE["MINIMIZE_INVISIBLE_GROUPS"] = 2] = "MINIMIZE_INVISIBLE_GROUPS"; // remove invisible groups

      STATUS_TYPE[STATUS_TYPE["REMOVE_INVISIBLE_GROUPS"] = 3] = "REMOVE_INVISIBLE_GROUPS";
    })(STATUS_TYPE || (STATUS_TYPE = {}));

    var INVISIBLE_POS = -9999;

    /**
     * @extends Grid.GridItem
     */

    var InfiniteGridItem =
    /*#__PURE__*/
    function (_super) {
      __extends(InfiniteGridItem, _super);

      function InfiniteGridItem(horizontal, itemStatus) {
        var _this = _super.call(this, horizontal, __assign({
          html: "",
          type: ITEM_TYPE.NORMAL,
          cssRect: {
            top: INVISIBLE_POS,
            left: INVISIBLE_POS
          }
        }, itemStatus)) || this;

        if (_this.type === ITEM_TYPE.VIRTUAL) {
          if (_this.rect.width || _this.rect.height) {
            _this.mountState = MOUNT_STATE.UNMOUNTED;
          }

          var orgRect = _this.orgRect;
          var rect = _this.rect;
          var cssRect = _this.cssRect;

          if (cssRect.width) {
            rect.width = cssRect.width;
          } else if (orgRect.width) {
            rect.width = orgRect.width;
          }

          if (cssRect.height) {
            rect.height = cssRect.height;
          } else if (orgRect.height) {
            rect.height = orgRect.height;
          }
        }

        return _this;
      }

      var __proto = InfiniteGridItem.prototype;

      __proto.getVirtualStatus = function () {
        return {
          type: ITEM_TYPE.VIRTUAL,
          groupKey: this.groupKey,
          key: this.key,
          orgRect: this.orgRect,
          rect: this.rect,
          cssRect: this.cssRect,
          attributes: this.attributes
        };
      };

      __proto.getMinimizedStatus = function () {
        var status = __assign(__assign({}, _super.prototype.getStatus.call(this)), {
          type: ITEM_TYPE.NORMAL,
          groupKey: this.groupKey
        });

        if (this.html) {
          status.html = this.html;
        }

        return status;
      };

      return InfiniteGridItem;
    }(GridItem);

    var LOADING_GROUP_KEY = "__INFINITEGRID__LOADING_GRID";
    var LOADING_ITEM_KEY = "__INFINITEGRID__LOADING_ITEM";

    var LoadingGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(LoadingGrid, _super);

      function LoadingGrid() {
        var _this = _super !== null && _super.apply(this, arguments) || this;

        _this.type = "";
        return _this;
      }

      var __proto = LoadingGrid.prototype;

      __proto.getLoadingItem = function () {
        return this.items[0] || null;
      };

      __proto.setLoadingItem = function (item) {
        if (item) {
          var loadingItem = this.getLoadingItem();

          if (!loadingItem) {
            this.items = [new InfiniteGridItem(this.options.horizontal, __assign(__assign({}, item), {
              type: ITEM_TYPE.LOADING,
              key: LOADING_ITEM_KEY
            }))];
          } else {
            for (var name in item) {
              loadingItem[name] = item[name];
            }
          }
        } else {
          this.items = [];
        }
      };

      __proto.applyGrid = function (items, direction, outline) {
        if (!items.length) {
          return {
            start: outline,
            end: outline
          };
        }

        var nextOutline = outline.length ? __spreadArrays(outline) : [0];
        var item = items[0];
        var offset = item.contentSize + this.gap;
        item.cssInlinePos = this.getContainerInlineSize() / 2 - item.inlineSize / 2;

        if (direction === "end") {
          var maxPos = Math.max.apply(Math, nextOutline);
          item.cssContentPos = maxPos;
          return {
            start: nextOutline,
            end: nextOutline.map(function (pos) {
              return pos + offset;
            })
          };
        } else {
          var minPos = Math.min.apply(Math, nextOutline);
          item.cssContentPos = minPos - offset;
          return {
            start: nextOutline.map(function (pos) {
              return pos - offset;
            }),
            end: nextOutline
          };
        }
      };

      return LoadingGrid;
    }(Grid);

    function isWindow$1(el) {
      return el === window;
    }
    function isNumber$1(val) {
      return typeof val === "number";
    }
    function isString$1(val) {
      return typeof val === "string";
    }
    function isObject$1(val) {
      return typeof val === "object";
    }
    function flat(arr) {
      return arr.reduce(function (prev, cur) {
        return __spreadArrays(prev, cur);
      }, []);
    }
    function splitOptions(options) {
      var gridOptions = options.gridOptions,
          otherOptions = __rest(options, ["gridOptions"]);

      return __assign(__assign({}, splitGridOptions(gridOptions)), otherOptions);
    }
    function splitGridOptions(options) {
      var nextOptions = {};
      var gridOptions = {};
      var defaultOptions = Grid.defaultOptions;

      for (var name in options) {
        var value = options[name];

        if (!(name in IGNORE_PROPERITES_MAP)) {
          gridOptions[name] = value;
        }

        if (name in defaultOptions) {
          nextOptions[name] = value;
        }
      }

      return __assign(__assign({}, nextOptions), {
        gridOptions: gridOptions
      });
    }
    function categorize(items) {
      var groups = [];
      var groupKeys = {};
      var registeredGroupKeys = {};
      items.filter(function (item) {
        return item.groupKey != null;
      }).forEach(function (_a) {
        var groupKey = _a.groupKey;
        registeredGroupKeys[groupKey] = true;
      });
      var generatedGroupKey;
      var isContinuousGroupKey = false;
      items.forEach(function (item) {
        if (item.groupKey != null) {
          isContinuousGroupKey = false;
        } else {
          if (!isContinuousGroupKey) {
            generatedGroupKey = makeKey(registeredGroupKeys);
            isContinuousGroupKey = true;
            registeredGroupKeys[generatedGroupKey] = true;
          }

          item.groupKey = generatedGroupKey;
        }

        var groupKey = item.groupKey;
        var group = groupKeys[groupKey];

        if (!group) {
          group = {
            groupKey: groupKey,
            items: []
          };
          groupKeys[groupKey] = group;
          groups.push(group);
        }

        group.items.push(item);
      });
      return groups;
    }
    function getNextCursors(prevKeys, nextKeys, prevStartCursor, prevEndCursor) {
      var result = diff(prevKeys, nextKeys, function (key) {
        return key;
      });
      var nextStartCursor = -1;
      var nextEndCursor = -1; // sync cursors

      result.maintained.forEach(function (_a) {
        var prevIndex = _a[0],
            nextIndex = _a[1];

        if (prevStartCursor <= prevIndex && prevIndex <= prevEndCursor) {
          if (nextStartCursor === -1) {
            nextStartCursor = nextIndex;
            nextEndCursor = nextIndex;
          } else {
            nextStartCursor = Math.min(nextStartCursor, nextIndex);
            nextEndCursor = Math.max(nextEndCursor, nextIndex);
          }
        }
      });
      return {
        startCursor: nextStartCursor,
        endCursor: nextEndCursor
      };
    }
    function splitVirtualGroups(groups, direction, nextGroups) {
      var virtualGroups = [];

      if (direction === "start") {
        var index = findIndex(groups, function (group) {
          return group.type === GROUP_TYPE.NORMAL;
        });

        if (index === -1) {
          return [];
        }

        virtualGroups = groups.slice(0, index);
      } else {
        var index = findLastIndex(groups, function (group) {
          return group.type === GROUP_TYPE.NORMAL;
        });

        if (index === -1) {
          return [];
        }

        virtualGroups = groups.slice(index + 1);
      }

      var nextVirtualGroups = diff(virtualGroups, nextGroups, function (_a) {
        var groupKey = _a.groupKey;
        return groupKey;
      }).removed.map(function (index) {
        return virtualGroups[index];
      }).reverse();
      return nextVirtualGroups;
    }
    function getFirstRenderingItems(nextItems, horizontal) {
      var groups = categorize(nextItems);

      if (!groups[0]) {
        return [];
      }

      return groups[0].items.map(function (item) {
        return new InfiniteGridItem(horizontal, __assign({}, item));
      });
    }
    function getRenderingItemsByStatus(groupManagerStatus, nextItems, usePlaceholder, horizontal) {
      var prevGroups = groupManagerStatus.groups;
      var groups = categorize(nextItems);
      var startVirtualGroups = splitVirtualGroups(prevGroups, "start", groups);
      var endVirtualGroups = splitVirtualGroups(prevGroups, "end", groups);

      var nextGroups = __spreadArrays(startVirtualGroups, groups, endVirtualGroups);

      var _a = getNextCursors(prevGroups.map(function (group) {
        return group.groupKey;
      }), nextGroups.map(function (group) {
        return group.groupKey;
      }), groupManagerStatus.cursors[0], groupManagerStatus.cursors[1]),
          startCursor = _a.startCursor,
          endCursor = _a.endCursor;

      var nextVisibleItems = flat(nextGroups.slice(startCursor, endCursor + 1).map(function (group) {
        return group.items.map(function (item) {
          return new InfiniteGridItem(horizontal, __assign({}, item));
        });
      }));

      if (!usePlaceholder) {
        nextVisibleItems = nextVisibleItems.filter(function (item) {
          return item.type !== ITEM_TYPE.VIRTUAL;
        });
      }

      return nextVisibleItems;
    }
    function mountRenderingItems(items, options) {
      var grid = options.grid,
          usePlaceholder = options.usePlaceholder,
          useLoading = options.useLoading,
          useFirstRender = options.useFirstRender,
          status = options.status;

      if (!grid) {
        return;
      }

      if (usePlaceholder) {
        grid.setPlaceholder({});
      }

      if (useLoading) {
        grid.setLoading({});
      }

      if (status) {
        grid.setStatus(status, true);
      }

      grid.syncItems(items);

      if (useFirstRender && !status && grid.getGroups().length) {
        grid.setCursors(0, 0, true);
      }
    }
    function getRenderingItems(items, options) {
      var status = options.status,
          usePlaceholder = options.usePlaceholder,
          useLoading = options.useLoading,
          horizontal = options.horizontal,
          useFirstRender = options.useFirstRender,
          grid = options.grid;
      var visibleItems = [];

      if (grid) {
        grid.setPlaceholder(usePlaceholder ? {} : null);
        grid.setLoading(useLoading ? {} : null);
        grid.syncItems(items);
        visibleItems = grid.getRenderingItems();
      } else if (status) {
        visibleItems = getRenderingItemsByStatus(status.groupManager, items, !!usePlaceholder, !!horizontal);
      } else if (useFirstRender) {
        visibleItems = getFirstRenderingItems(items, !!horizontal);
      }

      return visibleItems;
    }
    /* Class Decorator */

    function InfiniteGridGetterSetter(component) {
      var prototype = component.prototype,
          propertyTypes = component.propertyTypes;

      var _loop_1 = function (name) {
        var attributes = {
          enumerable: true,
          configurable: true,
          get: function () {
            var options = this.groupManager.options;

            if (name in options) {
              return options[name];
            } else {
              return options.gridOptions[name];
            }
          },
          set: function (value) {
            var _a;

            var prevValue = this.groupManager[name];

            if (prevValue === value) {
              return;
            }

            this.groupManager.gridOptions = (_a = {}, _a[name] = value, _a);
          }
        };
        Object.defineProperty(prototype, name, attributes);
      };

      for (var name in propertyTypes) {
        _loop_1(name);
      }
    }
    function makeKey(registeredKeys) {
      // eslint-disable-next-line no-constant-condition
      while (true) {
        var key = new Date().getTime() + Math.floor(Math.random() * 1000);

        if (!(key in registeredKeys)) {
          return key;
        }
      }
    }
    function convertHTMLtoElement(html) {
      var dummy = document.createElement("div");
      dummy.innerHTML = html;
      return toArray$1(dummy.children);
    }
    function convertInsertedItems(items, groupKey) {
      var insertedItems;

      if (isString$1(items)) {
        insertedItems = convertHTMLtoElement(items);
      } else {
        insertedItems = items;
      }

      return insertedItems.map(function (item) {
        var element;
        var html = "";
        var key;

        if (isString$1(item)) {
          html = item;
        } else if ("parentNode" in item) {
          element = item;
          html = item.outerHTML;
        } else {
          return __assign({
            groupKey: groupKey
          }, item);
        }

        return {
          key: key,
          groupKey: groupKey,
          html: html,
          element: element
        };
      });
    }
    function toArray$1(nodes) {
      var array = [];

      if (nodes) {
        var length = nodes.length;

        for (var i = 0; i < length; i++) {
          array.push(nodes[i]);
        }
      }

      return array;
    }
    function findIndex(arr, callback) {
      var length = arr.length;

      for (var i = 0; i < length; ++i) {
        if (callback(arr[i], i)) {
          return i;
        }
      }

      return -1;
    }
    function findLastIndex(arr, callback) {
      var length = arr.length;

      for (var i = length - 1; i >= 0; --i) {
        if (callback(arr[i], i)) {
          return i;
        }
      }

      return -1;
    }
    function getItemInfo(info) {
      var nextInfo = {};

      for (var name in info) {
        if (name in ITEM_INFO_PROPERTIES) {
          nextInfo[name] = info[name];
        }
      }

      return nextInfo;
    }
    function setPlaceholder(item, info) {
      for (var name in info) {
        var value = info[name];

        if (isObject$1(value)) {
          item[name] = __assign(__assign({}, item[name]), value);
        } else {
          item[name] = info[name];
        }
      }
    }
    function isFlatOutline(start, end) {
      return start.length === end.length && start.every(function (pos, i) {
        return end[i] === pos;
      });
    }
    function range$1(length) {
      var arr = [];

      for (var i = 0; i < length; ++i) {
        arr.push(i);
      }

      return arr;
    }
    function flatGroups(groups) {
      return flat(groups.map(function (_a) {
        var grid = _a.grid;
        return grid.getItems();
      }));
    }
    function filterVirtuals(items, includePlaceholders) {
      if (includePlaceholders) {
        return items;
      } else {
        return items.filter(function (item) {
          return item.type !== ITEM_TYPE.VIRTUAL;
        });
      }
    }
    /**
     * Decorator that makes the method of InfiniteGrid available in the framework.
     * @ko 프레임워크에서 InfiniteGrid의 메소드를 사용할 수 있게 하는 데코레이터.
     * @private
     * @example
     * ```js
     * import { withInfiniteGridMethods } from "@egjs/infinitegrid";
     *
     * class Grid extends React.Component<Partial<InfiniteGridProps & InfiniteGridOptions>> {
     *   &#64;withInfiniteGridMethods
     *   private grid: NativeGrid;
     * }
     * ```
     */

    var withInfiniteGridMethods = withMethods(INFINITEGRID_METHODS);

    var GroupManager =
    /*#__PURE__*/
    function (_super) {
      __extends(GroupManager, _super);

      function GroupManager(container, options) {
        var _this = _super.call(this, container, splitOptions(options)) || this;

        _this.groupItems = [];
        _this.groups = [];
        _this.itemKeys = {};
        _this.groupKeys = {};
        _this.startCursor = 0;
        _this.endCursor = 0;
        _this._placeholder = null;
        _this._loadingGrid = new LoadingGrid(container, {
          externalContainerManager: _this.containerManager,
          useFit: false,
          autoResize: false,
          renderOnPropertyChange: false,
          gap: _this.gap
        });
        return _this;
      }

      var __proto = GroupManager.prototype;
      Object.defineProperty(__proto, "gridOptions", {
        set: function (options) {
          var _a = splitGridOptions(options),
              gridOptions = _a.gridOptions,
              otherOptions = __rest(_a, ["gridOptions"]);

          var shouldRender = this._checkShouldRender(options);

          this.options.gridOptions = __assign(__assign({}, this.options.gridOptions), gridOptions);
          this.groups.forEach(function (_a) {
            var grid = _a.grid;

            for (var name in options) {
              grid[name] = options[name];
            }
          });

          for (var name in otherOptions) {
            this[name] = otherOptions[name];
          }

          this._loadingGrid.gap = this.gap;

          if (shouldRender) {
            this.scheduleRender();
          }
        },
        enumerable: false,
        configurable: true
      });

      __proto.getItemByKey = function (key) {
        return this.itemKeys[key] || null;
      };

      __proto.getGroupItems = function (includePlaceholders) {
        return filterVirtuals(this.groupItems, includePlaceholders);
      };

      __proto.getVisibleItems = function (includePlaceholders) {
        return filterVirtuals(this.items, includePlaceholders);
      };

      __proto.getRenderingItems = function () {
        if (this.hasPlaceholder()) {
          return this.items;
        } else {
          return this.items.filter(function (item) {
            return item.type !== ITEM_TYPE.VIRTUAL;
          });
        }
      };

      __proto.getGroups = function (includePlaceholders) {
        return filterVirtuals(this.groups, includePlaceholders);
      };

      __proto.hasVisibleVirtualGroups = function () {
        return this.getVisibleGroups(true).some(function (group) {
          return group.type === GROUP_TYPE.VIRTUAL;
        });
      };

      __proto.hasPlaceholder = function () {
        return !!this._placeholder;
      };

      __proto.hasLoadingItem = function () {
        return !!this._getLoadingItem();
      };

      __proto.setPlaceholder = function (placeholder) {
        this._placeholder = placeholder;

        this._updatePlaceholder();
      };

      __proto.getLoadingType = function () {
        return this._loadingGrid.type;
      };

      __proto.startLoading = function (type) {
        this._loadingGrid.type = type;
        this.items = this._getRenderingItems();
        return true;
      };

      __proto.endLoading = function () {
        var prevType = this._loadingGrid.type;
        this._loadingGrid.type = "";
        this.items = this._getRenderingItems();
        return !!prevType;
      };

      __proto.setLoading = function (loading) {
        this._loadingGrid.setLoadingItem(loading);

        this.items = this._getRenderingItems();
      };

      __proto.getVisibleGroups = function (includePlaceholders) {
        var groups = this.groups.slice(this.startCursor, this.endCursor + 1);
        return filterVirtuals(groups, includePlaceholders);
      };

      __proto.applyGrid = function (items, direction, outline) {
        var _this = this;

        items.forEach(function (item) {
          item.mountState = MOUNT_STATE.MOUNTED;
        });
        var renderingGroups = this.groups.slice();

        if (!renderingGroups.length) {
          return {
            start: [],
            end: []
          };
        }

        var loadingGrid = this._loadingGrid;

        if (loadingGrid.getLoadingItem()) {
          if (loadingGrid.type === "start") {
            renderingGroups.unshift(this._getLoadingGroup());
          } else if (loadingGrid.type === "end") {
            renderingGroups.push(this._getLoadingGroup());
          }
        }

        var groups = renderingGroups.slice();
        var nextOutline = outline;

        if (direction === "start") {
          groups.reverse();
        }

        groups.forEach(function (group) {
          var grid = group.grid;
          var gridItems = grid.getItems();
          var isVirtual = group.type === GROUP_TYPE.VIRTUAL && !gridItems[0];
          var appliedItems = gridItems.filter(function (item) {
            return item.mountState !== MOUNT_STATE.UNCHECKED && item.rect.width;
          });
          var gridOutlines;

          if (isVirtual) {
            gridOutlines = _this._applyVirtualGrid(grid, direction, nextOutline);
          } else if (appliedItems.length) {
            gridOutlines = grid.applyGrid(appliedItems, direction, nextOutline);
          } else {
            gridOutlines = {
              start: __spreadArrays(nextOutline),
              end: __spreadArrays(nextOutline)
            };
          }

          grid.setOutlines(gridOutlines);
          nextOutline = gridOutlines[direction];
        });
        return {
          start: renderingGroups[0].grid.getOutlines().start,
          end: renderingGroups[renderingGroups.length - 1].grid.getOutlines().end
        };
      };

      __proto.syncItems = function (nextItemInfos) {
        var _this = this;

        var prevItemKeys = this.itemKeys;
        this.itemKeys = {};

        var nextItems = this._syncItemInfos(nextItemInfos.map(function (info) {
          return getItemInfo(info);
        }), prevItemKeys);

        var prevGroupKeys = this.groupKeys;
        var nextManagerGroups = categorize(nextItems);

        var startVirtualGroups = this._splitVirtualGroups("start", nextManagerGroups);

        var endVirtualGroups = this._splitVirtualGroups("end", nextManagerGroups);

        nextManagerGroups = __spreadArrays(startVirtualGroups, this._mergeVirtualGroups(nextManagerGroups), endVirtualGroups);
        var nextGroups = nextManagerGroups.map(function (_a) {
          var _b, _c;

          var groupKey = _a.groupKey,
              items = _a.items;
          var isVirtual = !items[0] || items[0].type === ITEM_TYPE.VIRTUAL;
          var grid = (_c = (_b = prevGroupKeys[groupKey]) === null || _b === void 0 ? void 0 : _b.grid) !== null && _c !== void 0 ? _c : _this._makeGrid();
          var gridItems = isVirtual ? items : items.filter(function (_a) {
            var type = _a.type;
            return type === ITEM_TYPE.NORMAL;
          });
          grid.setItems(gridItems);
          return {
            type: isVirtual ? GROUP_TYPE.VIRTUAL : GROUP_TYPE.NORMAL,
            groupKey: groupKey,
            grid: grid,
            items: gridItems,
            renderItems: items
          };
        });

        this._registerGroups(nextGroups);
      };

      __proto.renderItems = function (options) {
        if (options === void 0) {
          options = {};
        }

        if (options.useResize) {
          this.groupItems.forEach(function (item) {
            item.updateState = UPDATE_STATE.NEED_UPDATE;
          });

          var loadingItem = this._getLoadingItem();

          if (loadingItem) {
            loadingItem.updateState = UPDATE_STATE.NEED_UPDATE;
          }
        }

        return _super.prototype.renderItems.call(this, options);
      };

      __proto.setCursors = function (startCursor, endCursor) {
        this.startCursor = startCursor;
        this.endCursor = endCursor;
        this.items = this._getRenderingItems();
      };

      __proto.getStartCursor = function () {
        return this.startCursor;
      };

      __proto.getEndCursor = function () {
        return this.endCursor;
      };

      __proto.getGroupStatus = function (type) {
        var orgStartCursor = this.startCursor;
        var orgEndCursor = this.endCursor;
        var orgGroups = this.groups;
        var startCursor = orgStartCursor;
        var endCursor = orgEndCursor;
        var isMinimizeItems = type === STATUS_TYPE.MINIMIZE_INVISIBLE_ITEMS;
        var isMinimizeGroups = type === STATUS_TYPE.MINIMIZE_INVISIBLE_GROUPS;
        var groups;

        if (type === STATUS_TYPE.REMOVE_INVISIBLE_GROUPS) {
          groups = this.getVisibleGroups();
          endCursor -= startCursor;
          startCursor = 0;
        } else {
          groups = this.getGroups();
        }

        var groupStatus = groups.map(function (_a, i) {
          var grid = _a.grid,
              groupKey = _a.groupKey;
          var isOutsideCursor = i < startCursor || endCursor < i;
          var isVirtualItems = isMinimizeItems && isOutsideCursor;
          var isVirtualGroup = isMinimizeGroups && isOutsideCursor;
          var gridItems = grid.getItems();
          var items = isVirtualGroup ? [] : gridItems.map(function (item) {
            return isVirtualItems ? item.getVirtualStatus() : item.getMinimizedStatus();
          });
          return {
            type: isVirtualGroup || isVirtualItems ? GROUP_TYPE.VIRTUAL : GROUP_TYPE.NORMAL,
            groupKey: groupKey,
            outlines: grid.getOutlines(),
            items: items
          };
        });
        var startGroup = orgGroups[orgStartCursor];
        var endGroup = orgGroups[orgEndCursor];
        var totalItems = this.getGroupItems();
        var itemStartCursor = totalItems.indexOf(startGroup === null || startGroup === void 0 ? void 0 : startGroup.items[0]);
        var itemEndCursor = totalItems.indexOf(endGroup === null || endGroup === void 0 ? void 0 : endGroup.items.slice().reverse()[0]);
        return {
          cursors: [startCursor, endCursor],
          orgCursors: [orgStartCursor, orgEndCursor],
          itemCursors: [itemStartCursor, itemEndCursor],
          startGroupKey: startGroup === null || startGroup === void 0 ? void 0 : startGroup.groupKey,
          endGroupKey: endGroup === null || endGroup === void 0 ? void 0 : endGroup.groupKey,
          groups: groupStatus,
          outlines: this.outlines
        };
      };

      __proto.setGroupStatus = function (status) {
        var _this = this;

        this.itemKeys = {};
        this.groupItems = [];
        this.items = [];
        var prevGroupKeys = this.groupKeys;
        var nextGroups = status.groups.map(function (_a) {
          var _b, _c;

          var type = _a.type,
              groupKey = _a.groupKey,
              items = _a.items,
              outlines = _a.outlines;

          var nextItems = _this._syncItemInfos(items);

          var grid = (_c = (_b = prevGroupKeys[groupKey]) === null || _b === void 0 ? void 0 : _b.grid) !== null && _c !== void 0 ? _c : _this._makeGrid();
          grid.setOutlines(outlines);
          grid.setItems(nextItems);
          return {
            type: type,
            groupKey: groupKey,
            grid: grid,
            items: nextItems,
            renderItems: nextItems
          };
        });
        this.setOutlines(status.outlines);

        this._registerGroups(nextGroups);

        this._updatePlaceholder();

        this.setCursors(status.cursors[0], status.cursors[1]);
      };

      __proto.appendPlaceholders = function (items, groupKey) {
        return this.insertPlaceholders("end", items, groupKey);
      };

      __proto.prependPlaceholders = function (items, groupKey) {
        return this.insertPlaceholders("start", items, groupKey);
      };

      __proto.removePlaceholders = function (type) {
        var groups = this.groups;
        var length = groups.length;

        if (type === "start") {
          var index = findIndex(groups, function (group) {
            return group.type === GROUP_TYPE.NORMAL;
          });
          groups.splice(0, index);
        } else if (type === "end") {
          var index = findLastIndex(groups, function (group) {
            return group.type === GROUP_TYPE.NORMAL;
          });
          groups.splice(index + 1, length - index - 1);
        } else {
          var groupKey_1 = type.groupKey;
          var index = findIndex(groups, function (group) {
            return group.groupKey === groupKey_1;
          });

          if (index > -1) {
            groups.splice(index, 1);
          }
        }

        this.syncItems(flatGroups(this.getGroups()));
      };

      __proto.insertPlaceholders = function (direction, items, groupKey) {
        var _a, _b;

        if (groupKey === void 0) {
          groupKey = makeKey(this.groupKeys);
        }

        var infos = [];

        if (isNumber$1(items)) {
          infos = range$1(items).map(function () {
            return {
              type: ITEM_TYPE.VIRTUAL,
              groupKey: groupKey
            };
          });
        } else if (Array.isArray(items)) {
          infos = items.map(function (status) {
            return __assign(__assign({
              groupKey: groupKey
            }, status), {
              type: ITEM_TYPE.VIRTUAL
            });
          });
        }

        var grid = this._makeGrid();

        var nextItems = this._syncItemInfos(infos, this.itemKeys);

        this._updatePlaceholder(nextItems);

        grid.setItems(nextItems);
        var group = {
          type: GROUP_TYPE.VIRTUAL,
          groupKey: groupKey,
          grid: grid,
          items: nextItems,
          renderItems: nextItems
        };
        this.groupKeys[groupKey] = group;

        if (direction === "end") {
          this.groups.push(group);

          (_a = this.groupItems).push.apply(_a, nextItems);
        } else {
          this.groups.splice(0, 0, group);

          (_b = this.groupItems).splice.apply(_b, __spreadArrays([0, 0], nextItems));

          if (this.startCursor > -1) {
            ++this.startCursor;
            ++this.endCursor;
          }
        }

        return {
          group: group,
          items: nextItems
        };
      };

      __proto.shouldRerenderItems = function () {
        var isRerender = false;
        this.getVisibleGroups().forEach(function (group) {
          var items = group.items;

          if (items.length === group.renderItems.length || items.every(function (item) {
            return item.mountState === MOUNT_STATE.UNCHECKED;
          })) {
            return;
          }

          isRerender = true;
          group.renderItems = __spreadArrays(items);
        });

        if (isRerender) {
          this.items = this._getRenderingItems();
        }

        return isRerender;
      };

      __proto._getGroupItems = function () {
        return flatGroups(this.getGroups(true));
      };

      __proto._getRenderingItems = function () {
        var items = flat(this.getVisibleGroups(true).map(function (item) {
          return item.renderItems;
        }));
        var loadingGrid = this._loadingGrid;
        var loadingItem = loadingGrid.getLoadingItem();

        if (loadingItem) {
          if (loadingGrid.type === "end") {
            items.push(loadingItem);
          } else if (loadingGrid.type === "start") {
            items.unshift(loadingItem);
          }
        }

        return items;
      };

      __proto._checkShouldRender = function (options) {
        var GridConstructor = this.options.gridConstructor;
        var prevOptions = this.gridOptions;
        var propertyTypes = GridConstructor.propertyTypes;

        for (var name in prevOptions) {
          if (!(name in options) && propertyTypes[name] === PROPERTY_TYPE.RENDER_PROPERTY) {
            return true;
          }
        }

        for (var name in options) {
          if (prevOptions[name] !== options[name] && propertyTypes[name] === PROPERTY_TYPE.RENDER_PROPERTY) {
            return true;
          }
        }

        return false;
      };

      __proto._applyVirtualGrid = function (grid, direction, outline) {
        var startOutline = outline.length ? __spreadArrays(outline) : [0];
        var prevOutlines = grid.getOutlines();
        var prevOutline = prevOutlines[direction === "end" ? "start" : "end"];

        if (prevOutline.length !== startOutline.length || prevOutline.some(function (value, i) {
          return value !== startOutline[i];
        })) {
          return {
            start: __spreadArrays(startOutline),
            end: __spreadArrays(startOutline)
          };
        }

        return prevOutlines;
      };

      __proto._syncItemInfos = function (nextItemInfos, prevItemKeys) {
        if (prevItemKeys === void 0) {
          prevItemKeys = {};
        }

        var horizontal = this.options.horizontal;
        var nextItemKeys = this.itemKeys;
        nextItemInfos.filter(function (info) {
          return info.key != null;
        }).forEach(function (info) {
          var key = info.key;
          var prevItem = prevItemKeys[key];

          if (!prevItem) {
            nextItemKeys[key] = new InfiniteGridItem(horizontal, __assign({}, info));
          } else if (prevItem.type === ITEM_TYPE.VIRTUAL && info.type !== ITEM_TYPE.VIRTUAL) {
            nextItemKeys[key] = new InfiniteGridItem(horizontal, __assign({
              orgRect: prevItem.orgRect,
              rect: prevItem.rect
            }, info));
          } else {
            if (info.data) {
              prevItem.data = info.data;
            }

            nextItemKeys[key] = prevItem;
          }
        });
        var nextItems = nextItemInfos.map(function (info) {
          var key = info.key;

          if (info.key == null) {
            key = makeKey(nextItemKeys);
            nextItemKeys[key] = new InfiniteGridItem(horizontal, __assign(__assign({}, info), {
              key: key
            }));
          }

          return nextItemKeys[key];
        });
        return nextItems;
      };

      __proto._registerGroups = function (groups) {
        var nextGroupKeys = {};
        groups.forEach(function (group) {
          nextGroupKeys[group.groupKey] = group;
        });
        this.groups = groups;
        this.groupKeys = nextGroupKeys;
        this.groupItems = this._getGroupItems();
      };

      __proto._splitVirtualGroups = function (direction, nextGroups) {
        var groups = splitVirtualGroups(this.groups, direction, nextGroups);
        var itemKeys = this.itemKeys;
        groups.forEach(function (_a) {
          var renderItems = _a.renderItems;
          renderItems.forEach(function (item) {
            itemKeys[item.key] = item;
          });
        });
        return groups;
      };

      __proto._mergeVirtualGroups = function (groups) {
        var itemKeys = this.itemKeys;
        var groupKeys = this.groupKeys;
        groups.forEach(function (group) {
          var prevGroup = groupKeys[group.groupKey];

          if (!prevGroup) {
            return;
          }

          var items = group.items;

          if (items.every(function (item) {
            return item.mountState === MOUNT_STATE.UNCHECKED;
          })) {
            prevGroup.renderItems.forEach(function (item) {
              if (item.type === ITEM_TYPE.VIRTUAL && !itemKeys[item.key]) {
                items.push(item);
                itemKeys[item.key] = item;
              }
            });
          }
        });
        return groups;
      };

      __proto._updatePlaceholder = function (items) {
        if (items === void 0) {
          items = this.groupItems;
        }

        var placeholder = this._placeholder;

        if (!placeholder) {
          return;
        }

        items.filter(function (item) {
          return item.type === ITEM_TYPE.VIRTUAL;
        }).forEach(function (item) {
          setPlaceholder(item, placeholder);
        });
      };

      __proto._makeGrid = function () {
        var GridConstructor = this.options.gridConstructor;
        var gridOptions = this.gridOptions;
        var container = this.containerElement;
        return new GridConstructor(container, __assign(__assign({}, gridOptions), {
          useFit: false,
          autoResize: false,
          renderOnPropertyChange: false,
          externalContainerManager: this.containerManager,
          externalItemRenderer: this.itemRenderer
        }));
      };

      __proto._getLoadingGroup = function () {
        var loadingGrid = this._loadingGrid;
        var items = loadingGrid.getItems();
        return {
          groupKey: LOADING_GROUP_KEY,
          type: GROUP_TYPE.NORMAL,
          grid: loadingGrid,
          items: items,
          renderItems: items
        };
      };

      __proto._getLoadingItem = function () {
        return this._loadingGrid.getLoadingItem();
      };

      GroupManager.defaultOptions = __assign(__assign({}, Grid.defaultOptions), {
        gridConstructor: null,
        gridOptions: {}
      });
      GroupManager.propertyTypes = __assign(__assign({}, Grid.propertyTypes), {
        gridConstructor: PROPERTY_TYPE.PROPERTY,
        gridOptions: PROPERTY_TYPE.PROPERTY
      });
      GroupManager = __decorate([GetterSetter], GroupManager);
      return GroupManager;
    }(Grid);

    var Infinite =
    /*#__PURE__*/
    function (_super) {
      __extends(Infinite, _super);

      function Infinite(options) {
        var _this = _super.call(this) || this;

        _this.startCursor = -1;
        _this.endCursor = -1;
        _this.size = 0;
        _this.items = [];
        _this.itemKeys = {};
        _this.options = __assign({
          threshold: 0,
          useRecycle: true,
          defaultDirection: "end"
        }, options);
        return _this;
      }

      var __proto = Infinite.prototype;

      __proto.scroll = function (scrollPos) {
        var prevStartCursor = this.startCursor;
        var prevEndCursor = this.endCursor;
        var items = this.items;
        var length = items.length;
        var size = this.size;
        var _a = this.options,
            defaultDirection = _a.defaultDirection,
            threshold = _a.threshold,
            useRecycle = _a.useRecycle;
        var isDirectionEnd = defaultDirection === "end";

        if (!length) {
          this.trigger(isDirectionEnd ? "requestAppend" : "requestPrepend", {
            key: undefined,
            isVirtual: false
          });
          return;
        } else if (prevStartCursor === -1 || prevEndCursor === -1) {
          var nextCursor = isDirectionEnd ? 0 : length - 1;
          this.trigger("change", {
            prevStartCursor: prevStartCursor,
            prevEndCursor: prevEndCursor,
            nextStartCursor: nextCursor,
            nextEndCursor: nextCursor
          });
          return;
        }

        var endScrollPos = scrollPos + size;
        var startEdgePos = Math.max.apply(Math, items[prevStartCursor].startOutline);
        var endEdgePos = Math.min.apply(Math, items[prevEndCursor].endOutline);
        var visibles = items.map(function (item) {
          var startOutline = item.startOutline,
              endOutline = item.endOutline;

          if (!startOutline.length || !endOutline.length) {
            return false;
          }

          var startPos = Math.min.apply(Math, startOutline);
          var endPos = Math.max.apply(Math, endOutline);

          if (startPos - threshold <= endScrollPos && scrollPos <= endPos + threshold) {
            return true;
          }

          return false;
        });
        var hasStartItems = 0 < prevStartCursor;
        var hasEndItems = prevEndCursor < length - 1;
        var isStart = scrollPos <= startEdgePos + threshold;
        var isEnd = endScrollPos >= endEdgePos - threshold;
        var nextStartCursor = visibles.indexOf(true);
        var nextEndCursor = visibles.lastIndexOf(true);

        if (nextStartCursor === -1) {
          nextStartCursor = prevStartCursor;
          nextEndCursor = prevEndCursor;
        }

        if (!useRecycle) {
          nextStartCursor = Math.min(nextStartCursor, prevStartCursor);
          nextEndCursor = Math.max(nextEndCursor, prevEndCursor);
        }

        if (nextStartCursor === prevStartCursor && hasStartItems && isStart) {
          nextStartCursor -= 1;
        }

        if (nextEndCursor === prevEndCursor && hasEndItems && isEnd) {
          nextEndCursor += 1;
        }

        if (prevStartCursor !== nextStartCursor || prevEndCursor !== nextEndCursor) {
          this.trigger("change", {
            prevStartCursor: prevStartCursor,
            prevEndCursor: prevEndCursor,
            nextStartCursor: nextStartCursor,
            nextEndCursor: nextEndCursor
          });
          return;
        } else if (this._requestVirtualItems()) {
          return;
        } else if ((!isDirectionEnd || !isEnd) && isStart) {
          this.trigger("requestPrepend", {
            key: items[prevStartCursor].key,
            isVirtual: false
          });
        } else if ((isDirectionEnd || !isStart) && isEnd) {
          this.trigger("requestAppend", {
            key: items[prevEndCursor].key,
            isVirtual: false
          });
        }
      };
      /**
       * @private
       * Call the requestAppend or requestPrepend event to fill the virtual items.
       * @ko virtual item을 채우기 위해 requestAppend 또는 requestPrepend 이벤트를 호출합니다.
       * @return - Whether the event is called. <ko>이벤트를 호출했는지 여부.</ko>
       */


      __proto._requestVirtualItems = function () {
        var isDirectionEnd = this.options.defaultDirection === "end";
        var items = this.items;
        var totalVisibleItems = this.getVisibleItems();
        var visibleItems = totalVisibleItems.filter(function (item) {
          return !item.isVirtual;
        });
        var totalVisibleLength = totalVisibleItems.length;
        var visibleLength = visibleItems.length;
        var startCursor = this.getStartCursor();
        var endCursor = this.getEndCursor();

        if (visibleLength === totalVisibleLength) {
          return false;
        } else if (visibleLength) {
          var startKey_1 = visibleItems[0].key;
          var endKey_1 = visibleItems[visibleLength - 1].key;
          var startIndex = findIndex(items, function (item) {
            return item.key === startKey_1;
          }) - 1;
          var endIndex = findIndex(items, function (item) {
            return item.key === endKey_1;
          }) + 1;
          var isEnd = endIndex <= endCursor;
          var isStart = startIndex >= startCursor; // Fill the placeholder with the original item.

          if ((isDirectionEnd || !isStart) && isEnd) {
            this.trigger("requestAppend", {
              key: endKey_1,
              nextKey: items[endIndex].key,
              isVirtual: true
            });
            return true;
          } else if ((!isDirectionEnd || !isEnd) && isStart) {
            this.trigger("requestPrepend", {
              key: startKey_1,
              nextKey: items[startIndex].key,
              isVirtual: true
            });
            return true;
          }
        } else if (totalVisibleLength) {
          var lastItem = totalVisibleItems[totalVisibleLength - 1];

          if (isDirectionEnd) {
            this.trigger("requestAppend", {
              nextKey: totalVisibleItems[0].key,
              isVirtual: true
            });
          } else {
            this.trigger("requestPrepend", {
              nextKey: lastItem.key,
              isVirtual: true
            });
          }

          return true;
        }

        return false;
      };

      __proto.setCursors = function (startCursor, endCursor) {
        this.startCursor = startCursor;
        this.endCursor = endCursor;
      };

      __proto.setSize = function (size) {
        this.size = size;
      };

      __proto.getStartCursor = function () {
        return this.startCursor;
      };

      __proto.getEndCursor = function () {
        return this.endCursor;
      };

      __proto.isLoading = function (direction) {
        var startCursor = this.startCursor;
        var endCursor = this.endCursor;
        var items = this.items;
        var firstItem = items[startCursor];
        var lastItem = items[endCursor];
        var length = items.length;

        if (direction === DIRECTION.END && endCursor > -1 && endCursor < length - 1 && !lastItem.isVirtual && !isFlatOutline(lastItem.startOutline, lastItem.endOutline)) {
          return false;
        }

        if (direction === DIRECTION.START && startCursor > 0 && !firstItem.isVirtual && !isFlatOutline(firstItem.startOutline, firstItem.endOutline)) {
          return false;
        }

        return true;
      };

      __proto.setItems = function (nextItems) {
        this.items = nextItems;
        var itemKeys = {};
        nextItems.forEach(function (item) {
          itemKeys[item.key] = item;
        });
        this.itemKeys = itemKeys;
      };

      __proto.syncItems = function (nextItems) {
        var prevItems = this.items;
        var prevStartCursor = this.startCursor;
        var prevEndCursor = this.endCursor;

        var _a = getNextCursors(this.items.map(function (item) {
          return item.key;
        }), nextItems.map(function (item) {
          return item.key;
        }), prevStartCursor, prevEndCursor),
            nextStartCursor = _a.startCursor,
            nextEndCursor = _a.endCursor; // sync items between cursors


        var isChange = nextEndCursor - nextStartCursor !== prevEndCursor - prevStartCursor || prevStartCursor === -1 || nextStartCursor === -1;

        if (!isChange) {
          var prevVisibleItems = prevItems.slice(prevStartCursor, prevEndCursor + 1);
          var nextVisibleItems = nextItems.slice(nextStartCursor, nextEndCursor + 1);
          var visibleResult = diff(prevVisibleItems, nextVisibleItems, function (item) {
            return item.key;
          });
          isChange = visibleResult.added.length > 0 || visibleResult.removed.length > 0 || visibleResult.changed.length > 0;
        }

        this.setItems(nextItems);
        this.setCursors(nextStartCursor, nextEndCursor);
        return isChange;
      };

      __proto.getItems = function () {
        return this.items;
      };

      __proto.getVisibleItems = function () {
        var startCursor = this.startCursor;
        var endCursor = this.endCursor;

        if (startCursor === -1) {
          return [];
        }

        return this.items.slice(startCursor, endCursor + 1);
      };

      __proto.getItemByKey = function (key) {
        return this.itemKeys[key];
      };

      __proto.getRenderedVisibleItems = function () {
        var items = this.getVisibleItems();
        var rendered = items.map(function (_a) {
          var startOutline = _a.startOutline,
              endOutline = _a.endOutline;
          var length = startOutline.length;

          if (length === 0 || length !== endOutline.length) {
            return false;
          }

          return startOutline.some(function (pos, i) {
            return endOutline[i] !== pos;
          });
        });
        var startIndex = rendered.indexOf(true);
        var endIndex = rendered.lastIndexOf(true);
        return endIndex === -1 ? [] : items.slice(startIndex, endIndex + 1);
      };

      __proto.destroy = function () {
        this.off();
        this.startCursor = -1;
        this.endCursor = -1;
        this.items = [];
        this.size = 0;
      };

      return Infinite;
    }(Component);

    var Renderer =
    /*#__PURE__*/
    function (_super) {
      __extends(Renderer, _super);

      function Renderer() {
        var _this = _super !== null && _super.apply(this, arguments) || this;

        _this.items = [];
        _this.container = null;
        _this.rendererKey = 0;
        _this._updateTimer = 0;
        _this._state = {};
        return _this;
      }

      var __proto = Renderer.prototype;

      __proto.updateKey = function () {
        this.rendererKey = Date.now();
      };

      __proto.getItems = function () {
        return this.items;
      };

      __proto.setContainer = function (container) {
        this.container = container;
      };

      __proto.render = function (nextItems, state) {
        if (state) {
          this._state = state;
        }

        return this.syncItems(nextItems);
      };

      __proto.update = function (state) {
        var _this = this;

        if (state === void 0) {
          state = {};
        }

        this._state = state;
        this.trigger("update", {
          state: state
        });
        clearTimeout(this._updateTimer);
        this._updateTimer = window.setTimeout(function () {
          _this.trigger("requestUpdate", {
            state: state
          });
        });
      };

      __proto.updated = function (nextElements) {
        var _a, _b;

        if (nextElements === void 0) {
          nextElements = (_b = (_a = this.container) === null || _a === void 0 ? void 0 : _a.children) !== null && _b !== void 0 ? _b : [];
        }

        var diffResult = this._diffResult;
        var isChanged = !!(diffResult.added.length || diffResult.removed.length || diffResult.changed.length);
        var state = this._state;
        this._state = {};
        var nextItems = diffResult.list;
        this.items = nextItems;
        nextItems.forEach(function (item, i) {
          item.element = nextElements[i];
        });
        this.trigger("updated", {
          items: nextItems,
          elements: toArray$1(nextElements),
          diffResult: this._diffResult,
          state: state,
          isChanged: isChanged
        });
        return isChanged;
      };

      __proto.destroy = function () {
        this.off();
      };

      __proto.syncItems = function (items) {
        var rendererKey = this.rendererKey;
        var prevItems = this.items;
        var nextItems = items.map(function (item) {
          return __assign(__assign({}, item), {
            renderKey: rendererKey + "_" + item.key
          });
        });
        var result = diff(prevItems, nextItems, function (item) {
          return item.renderKey;
        });
        this._diffResult = result;
        return result;
      };

      return Renderer;
    }(Component);

    var VanillaRenderer =
    /*#__PURE__*/
    function (_super) {
      __extends(VanillaRenderer, _super);

      function VanillaRenderer() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = VanillaRenderer.prototype;

      __proto.render = function (nextItems, state) {
        var container = this.container;

        var result = _super.prototype.render.call(this, nextItems, state);

        var prevList = result.prevList,
            removed = result.removed,
            ordered = result.ordered,
            added = result.added,
            list = result.list;

        var diffList = __spreadArrays(prevList);

        removed.forEach(function (index) {
          diffList.splice(index, 1);
          container.removeChild(prevList[index].element);
        });
        ordered.forEach(function (_a) {
          var _b, _c;

          var prevIndex = _a[0],
              nextIndex = _a[1];
          var item = diffList.splice(prevIndex, 1)[0];
          diffList.splice(nextIndex, 0, item);
          container.insertBefore(item.element, (_c = (_b = diffList[nextIndex + 1]) === null || _b === void 0 ? void 0 : _b.element) !== null && _c !== void 0 ? _c : null);
        });
        added.forEach(function (index) {
          var _a, _b;

          var item = list[index];
          diffList.splice(index, 0, item);
          container.insertBefore(item.element, (_b = (_a = diffList[index + 1]) === null || _a === void 0 ? void 0 : _a.element) !== null && _b !== void 0 ? _b : null);
        });
        this.updated(container.children);
        return result;
      };

      return VanillaRenderer;
    }(Renderer);

    var VanillaGridRenderer =
    /*#__PURE__*/
    function (_super) {
      __extends(VanillaGridRenderer, _super);

      function VanillaGridRenderer() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      var __proto = VanillaGridRenderer.prototype;

      __proto.syncItems = function (nextItems) {
        var result = _super.prototype.syncItems.call(this, nextItems);

        var added = result.added,
            list = result.list;
        added.forEach(function (index) {
          var orgItem = nextItems[index].orgItem;

          if (orgItem.html && !orgItem.element) {
            orgItem.element = convertHTMLtoElement(orgItem.html)[0];
          }

          list[index].element = orgItem.element;
        });
        return result;
      };

      return VanillaGridRenderer;
    }(VanillaRenderer);

    var ScrollManager =
    /*#__PURE__*/
    function (_super) {
      __extends(ScrollManager, _super);

      function ScrollManager(wrapper, options) {
        var _this = _super.call(this) || this;

        _this.wrapper = wrapper;
        _this.prevScrollPos = null;
        _this.scrollOffset = 0;
        _this.contentSize = 0;
        _this._isScrollIssue = IS_IOS;

        _this._onCheck = function () {
          var prevScrollPos = _this.getScrollPos();

          var nextScrollPos = _this.getOrgScrollPos();

          _this.setScrollPos(nextScrollPos);

          if (prevScrollPos === null || _this._isScrollIssue && nextScrollPos === 0 || prevScrollPos === nextScrollPos) {
            nextScrollPos && (_this._isScrollIssue = false);
            return;
          }

          _this._isScrollIssue = false;

          _this.trigger(new ComponentEvent$1("scroll", {
            direction: prevScrollPos < nextScrollPos ? "end" : "start",
            scrollPos: nextScrollPos,
            relativeScrollPos: _this.getRelativeScrollPos()
          }));
        };

        _this.options = __assign({
          container: false,
          containerTag: "div",
          horizontal: false
        }, options);

        _this._init();

        return _this;
      }

      var __proto = ScrollManager.prototype;

      __proto.getWrapper = function () {
        return this.wrapper;
      };

      __proto.getContainer = function () {
        return this.container;
      };

      __proto.getScrollContainer = function () {
        return this.scrollContainer;
      };

      __proto.getScrollOffset = function () {
        return this.scrollOffset;
      };

      __proto.getContentSize = function () {
        return this.contentSize;
      };

      __proto.getRelativeScrollPos = function () {
        return (this.prevScrollPos || 0) - this.scrollOffset;
      };

      __proto.getScrollPos = function () {
        return this.prevScrollPos;
      };

      __proto.setScrollPos = function (pos) {
        this.prevScrollPos = pos;
      };

      __proto.getOrgScrollPos = function () {
        var eventTarget = this.eventTarget;
        var horizontal = this.options.horizontal;
        var prop = "scroll" + (horizontal ? "Left" : "Top");

        if (isWindow$1(eventTarget)) {
          return window[horizontal ? "pageXOffset" : "pageYOffset"] || document.documentElement[prop] || document.body[prop];
        } else {
          return eventTarget[prop];
        }
      };

      __proto.setStatus = function (status) {
        this.contentSize = status.contentSize;
        this.scrollOffset = status.scrollOffset;
        this.prevScrollPos = status.prevScrollPos;
        this.scrollTo(this.prevScrollPos);
      };

      __proto.getStatus = function () {
        return {
          contentSize: this.contentSize,
          scrollOffset: this.scrollOffset,
          prevScrollPos: this.prevScrollPos
        };
      };

      __proto.scrollTo = function (pos) {
        var eventTarget = this.eventTarget;
        var horizontal = this.options.horizontal;

        var _a = horizontal ? [pos, 0] : [0, pos],
            x = _a[0],
            y = _a[1];

        if (isWindow$1(eventTarget)) {
          eventTarget.scroll(x, y);
        } else {
          eventTarget.scrollLeft = x;
          eventTarget.scrollTop = y;
        }
      };

      __proto.scrollBy = function (pos) {
        if (!pos) {
          return;
        }

        var eventTarget = this.eventTarget;
        var horizontal = this.options.horizontal;

        var _a = horizontal ? [pos, 0] : [0, pos],
            x = _a[0],
            y = _a[1];

        this.prevScrollPos += pos;

        if (isWindow$1(eventTarget)) {
          eventTarget.scrollBy(x, y);
        } else {
          eventTarget.scrollLeft += x;
          eventTarget.scrollTop += y;
        }
      };

      __proto.resize = function () {
        var scrollContainer = this.scrollContainer;
        var horizontal = this.options.horizontal;
        var scrollContainerRect = scrollContainer === document.body ? {
          top: 0,
          left: 0
        } : scrollContainer.getBoundingClientRect();
        var containerRect = this.container.getBoundingClientRect();
        this.scrollOffset = (this.prevScrollPos || 0) + (horizontal ? containerRect.left - scrollContainerRect.left : containerRect.top - scrollContainerRect.top);
        this.contentSize = horizontal ? scrollContainer.offsetWidth : scrollContainer.offsetHeight;
      };

      __proto.destroy = function () {
        var container = this.container;
        this.eventTarget.removeEventListener("scroll", this._onCheck);

        if (this._isCreateElement) {
          var scrollContainer = this.scrollContainer;
          var fragment_1 = document.createDocumentFragment();
          var childNodes = toArray$1(container.childNodes);
          scrollContainer.removeChild(container);
          childNodes.forEach(function (childNode) {
            fragment_1.appendChild(childNode);
          });
          scrollContainer.appendChild(fragment_1);
        } else if (this.options.container) {
          container.style.cssText = this._orgCSSText;
        }
      };

      __proto._init = function () {
        var _a;

        var _b = this.options,
            containerOption = _b.container,
            containerTag = _b.containerTag,
            horizontal = _b.horizontal;
        var wrapper = this.wrapper;
        var scrollContainer = wrapper;
        var container = wrapper;
        var containerCSSText = "";

        if (!containerOption) {
          scrollContainer = document.body;
          containerCSSText = container.style.cssText;
        } else {
          if (containerOption instanceof HTMLElement) {
            // Container that already exists
            container = containerOption;
          } else if (containerOption === true) {
            // Create Container
            container = document.createElement(containerTag);
            container.style.position = "relative";
            container.className = CONTAINER_CLASS_NAME;
            var childNodes = toArray$1(scrollContainer.childNodes);
            childNodes.forEach(function (childNode) {
              container.appendChild(childNode);
            });
            scrollContainer.appendChild(container);
            this._isCreateElement = true;
          } else {
            // Find Container by Selector
            container = scrollContainer.querySelector(containerOption);
          }

          containerCSSText = container.style.cssText;
          var style = scrollContainer.style;
          _a = horizontal ? ["scroll", "hidden"] : ["hidden", "scroll"], style.overflowX = _a[0], style.overflowY = _a[1];

          if (horizontal) {
            container.style.height = "100%";
          }
        }

        var eventTarget = scrollContainer === document.body ? window : scrollContainer;
        eventTarget.addEventListener("scroll", this._onCheck);
        this._orgCSSText = containerCSSText;
        this.container = container;
        this.scrollContainer = scrollContainer;
        this.eventTarget = eventTarget;
        this.resize();
        this.setScrollPos(this.getOrgScrollPos());
      };

      return ScrollManager;
    }(Component);

    /**
     * A module used to arrange items including content infinitely according to layout type. With this module, you can implement various layouts composed of different items whose sizes vary. It guarantees performance by maintaining the number of DOMs the module is handling under any circumstance
     * @ko 콘텐츠가 있는 아이템을 레이아웃 타입에 따라 무한으로 배치하는 모듈. 다양한 크기의 아이템을 다양한 레이아웃으로 배치할 수 있다. 아이템의 개수가 계속 늘어나도 모듈이 처리하는 DOM의 개수를 일정하게 유지해 최적의 성능을 보장한다
     * @extends Component
     * @support {"ie": "9+(with polyfill)", "ch" : "latest", "ff" : "latest",  "sf" : "latest", "edge" : "latest", "ios" : "7+", "an" : "4.X+"}
     * @example
    ```html
    <ul id="grid">
      <li class="card">
        <div>test1</div>
      </li>
      <li class="card">
        <div>test2</div>
      </li>
      <li class="card">
        <div>test3</div>
      </li>
      <li class="card">
        <div>test4</div>
      </li>
      <li class="card">
        <div>test5</div>
      </li>
      <li class="card">
        <div>test6</div>
      </li>
    </ul>
    <script>
    import { MasonryInfiniteGrid } from "@egjs/infinitegrid";
    var some = new MasonryInfiniteGrid("#grid").on("renderComplete", function(e) {
      // ...
    });
    // If you already have items in the container, call "layout" method.
    some.renderItems();
    </script>
    ```
     */

    var InfiniteGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(InfiniteGrid, _super);
      /**
       * @param - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
       * @param - The option object of the InfiniteGrid module <ko>eg.InfiniteGrid 모듈의 옵션 객체</ko>
       */


      function InfiniteGrid(wrapper, options) {
        var _this = _super.call(this) || this;

        _this._waitType = "";

        _this._onScroll = function (_a) {
          var direction = _a.direction,
              scrollPos = _a.scrollPos,
              relativeScrollPos = _a.relativeScrollPos;

          _this._scroll();
          /**
           * This event is fired when scrolling.
           * @ko 스크롤하면 발생하는 이벤트이다.
           * @event InfiniteGrid#changeScroll
           * @param {InfiniteGrid.OnChangeScroll} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           */


          _this.trigger(new ComponentEvent$1(INFINITEGRID_EVENTS.CHANGE_SCROLL, {
            direction: direction,
            scrollPos: scrollPos,
            relativeScrollPos: relativeScrollPos
          }));
        };

        _this._onChange = function (e) {
          _this.setCursors(e.nextStartCursor, e.nextEndCursor);
        };

        _this._onRendererUpdated = function (e) {
          if (!e.isChanged) {
            _this._checkEndLoading();

            _this._scroll();

            return;
          }

          var renderedItems = e.items;
          var _a = e.diffResult,
              added = _a.added,
              removed = _a.removed,
              prevList = _a.prevList,
              list = _a.list;
          removed.forEach(function (index) {
            var orgItem = prevList[index].orgItem;

            if (orgItem.mountState !== MOUNT_STATE.UNCHECKED) {
              orgItem.mountState = MOUNT_STATE.UNMOUNTED;
            }
          });
          renderedItems.forEach(function (item) {
            // set grid element
            var gridItem = item.orgItem;
            gridItem.element = item.element;
          });
          var horizontal = _this.options.horizontal;
          var addedItems = added.map(function (index) {
            var gridItem = list[index].orgItem;
            var element = gridItem.element;

            if (gridItem.type === ITEM_TYPE.VIRTUAL) {
              var cssRect = __assign({}, gridItem.cssRect);

              var rect = gridItem.rect;

              if (!cssRect.width && rect.width) {
                cssRect.width = rect.width;
              }

              if (!cssRect.height && rect.height) {
                cssRect.height = rect.height;
              } // virtual item


              return new GridItem(horizontal, {
                element: element,
                cssRect: cssRect
              });
            }

            return gridItem;
          });
          var _b = e.state,
              isRestore = _b.isRestore,
              isResize = _b.isResize;

          _this.itemRenderer.renderItems(addedItems);

          if (isRestore) {
            _this._onRenderComplete({
              mounted: added.map(function (index) {
                return list[index].orgItem;
              }),
              updated: [],
              isResize: false,
              direction: _this.defaultDirection
            });

            if (isResize) {
              _this.groupManager.renderItems();
            }
          } else {
            _this.groupManager.renderItems();
          }
        };

        _this._onResize = function () {
          _this.renderItems({
            useResize: true
          });
        };

        _this._onRequestAppend = function (e) {
          /**
           * The event is fired when scrolling reaches the end or when data for a virtual group is required.
           * @ko 스크롤이 끝에 도달하거나 virtual 그룹에 대한 데이터가 필요한 경우 이벤트가 발생한다.
           * @event InfiniteGrid#requestAppend
           * @param {InfiniteGrid.OnRequestAppend} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           */
          _this._onRequestInsert(DIRECTION.END, INFINITEGRID_EVENTS.REQUEST_APPEND, e);
        };

        _this._onRequestPrepend = function (e) {
          /**
           * The event is fired when scrolling reaches the start or when data for a virtual group is required.
           * @ko 스크롤이 끝에 도달하거나 virtual 그룹에 대한 데이터가 필요한 경우 이벤트가 발생한다.
           * @event InfiniteGrid#requestPrepend
           * @param {InfiniteGrid.OnRequestPrepend} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           */
          _this._onRequestInsert(DIRECTION.START, INFINITEGRID_EVENTS.REQUEST_PREPEND, e);
        };

        _this._onContentError = function (_a) {
          var element = _a.element,
              target = _a.target,
              item = _a.item,
              update = _a.update;
          /**
           * The event is fired when scrolling reaches the start or when data for a virtual group is required.
           * @ko 스크롤이 끝에 도달하거나 virtual 그룹에 대한 데이터가 필요한 경우 이벤트가 발생한다.
           * @event InfiniteGrid#contentError
           * @param {InfiniteGrid.OnContentError} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           */

          _this.trigger(new ComponentEvent$1(INFINITEGRID_EVENTS.CONTENT_ERROR, {
            element: element,
            target: target,
            item: item,
            update: update,
            remove: function () {
              _this.removeByKey(item.key);
            }
          }));
        };

        _this._onRenderComplete = function (_a) {
          var isResize = _a.isResize,
              mounted = _a.mounted,
              updated = _a.updated,
              direction = _a.direction;
          var infinite = _this.infinite;
          var prevRenderedGroups = infinite.getRenderedVisibleItems();
          var length = prevRenderedGroups.length;
          var isDirectionEnd = direction === DIRECTION.END;

          _this._syncInfinite();

          if (length) {
            var prevStandardGroup = prevRenderedGroups[isDirectionEnd ? 0 : length - 1];
            var nextStandardGroup = infinite.getItemByKey(prevStandardGroup.key);
            var offset = isDirectionEnd ? Math.min.apply(Math, nextStandardGroup.startOutline) - Math.min.apply(Math, prevStandardGroup.startOutline) : Math.max.apply(Math, nextStandardGroup.endOutline) - Math.max.apply(Math, prevStandardGroup.endOutline);

            _this.scrollManager.scrollBy(offset);
          }
          /**
           * This event is fired when the InfiniteGrid has completed rendering.
           * @ko InfiniteGrid가 렌더링이 완료됐을 때 이벤트가 발생한다.
           * @event InfiniteGrid#renderComplete
           * @param {InfiniteGrid.OnRenderComplete} e - The object of data to be sent to an event <ko>이벤트에 전달되는 데이터 객체</ko>
           */


          _this.trigger(new ComponentEvent$1(INFINITEGRID_EVENTS.RENDER_COMPLETE, {
            isResize: isResize,
            direction: direction,
            mounted: mounted.filter(function (item) {
              return item.type !== ITEM_TYPE.LOADING;
            }),
            updated: updated.filter(function (item) {
              return item.type !== ITEM_TYPE.LOADING;
            }),
            startCursor: _this.getStartCursor(),
            endCursor: _this.getEndCursor(),
            items: _this.getVisibleItems(true),
            groups: _this.getVisibleGroups(true)
          }));

          if (_this.groupManager.shouldRerenderItems()) {
            _this._update();
          } else {
            _this._checkEndLoading();

            _this._scroll();
          }
        };

        _this.options = __assign(__assign(__assign({}, _this.constructor.defaultOptions), {
          renderer: new VanillaGridRenderer().on("requestUpdate", function () {
            return _this._render();
          })
        }), options);

        var _a = _this.options,
            gridConstructor = _a.gridConstructor,
            containerTag = _a.containerTag,
            container = _a.container,
            renderer = _a.renderer,
            threshold = _a.threshold,
            useRecycle = _a.useRecycle,
            gridOptions = __rest(_a, ["gridConstructor", "containerTag", "container", "renderer", "threshold", "useRecycle"]); // options.container === false, wrapper = container, scrollContainer = document.body
        // options.container === true, wrapper = scrollContainer, container = wrapper's child
        // options.container === string,


        var horizontal = gridOptions.horizontal,
            attributePrefix = gridOptions.attributePrefix,
            useTransform = gridOptions.useTransform,
            percentage = gridOptions.percentage,
            isConstantSize = gridOptions.isConstantSize,
            isEqualSize = gridOptions.isEqualSize;
        var wrapperElement = isString$1(wrapper) ? document.querySelector(wrapper) : wrapper;
        var scrollManager = new ScrollManager(wrapperElement, {
          container: container,
          containerTag: containerTag,
          horizontal: horizontal
        }).on({
          scroll: _this._onScroll
        });
        var containerElement = scrollManager.getContainer();
        var containerManager = new ContainerManager(containerElement, {
          horizontal: horizontal
        }).on("resize", _this._onResize);
        var itemRenderer = new ItemRenderer({
          attributePrefix: attributePrefix,
          horizontal: horizontal,
          useTransform: useTransform,
          percentage: percentage,
          isEqualSize: isEqualSize,
          isConstantSize: isConstantSize
        });
        var infinite = new Infinite({
          useRecycle: useRecycle,
          threshold: threshold
        }).on({
          "change": _this._onChange,
          "requestAppend": _this._onRequestAppend,
          "requestPrepend": _this._onRequestPrepend
        });
        infinite.setSize(scrollManager.getContentSize());
        var groupManager = new GroupManager(containerElement, {
          gridConstructor: gridConstructor,
          externalItemRenderer: itemRenderer,
          externalContainerManager: containerManager,
          gridOptions: gridOptions
        });
        groupManager.on({
          "renderComplete": _this._onRenderComplete,
          "contentError": _this._onContentError
        });
        renderer.setContainer(containerElement);
        renderer.on("updated", _this._onRendererUpdated);
        _this.itemRenderer = itemRenderer;
        _this.groupManager = groupManager;
        _this.wrapperElement = wrapperElement;
        _this.scrollManager = scrollManager;
        _this.containerManager = containerManager;
        _this.infinite = infinite;

        _this.containerManager.resize();

        return _this;
      }

      var __proto = InfiniteGrid.prototype;
      InfiniteGrid_1 = InfiniteGrid;
      /**
       * Rearrange items to fit the grid and render them. When rearrange is complete, the `renderComplete` event is fired.
       * @ko grid에 맞게 아이템을 재배치하고 렌더링을 한다. 배치가 완료되면 `renderComplete` 이벤트가 발생한다.
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       * @example
       * ```ts
       * import { MasonryInfiniteGrid } from "@egjs/infinitegrid";
       * const grid = new MasonryInfiniteGrid();
       *
       * grid.on("renderComplete", e => {
       *   console.log(e);
       * });
       * grid.renderItems();
       * ```
       */

      __proto.renderItems = function (options) {
        if (options === void 0) {
          options = {};
        }

        if (options.useResize) {
          this.containerManager.resize();
        }

        this._resizeScroll();

        if (!this.getRenderingItems().length) {
          var children = toArray$1(this.getContainerElement().children);

          if (children.length > 0) {
            this.append(children);
          } else {
            this.infinite.scroll(0);
            return this;
          }
        }

        if (!this.getVisibleGroups(true).length) {
          this.setCursors(0, 0);
        } else {
          this.groupManager.renderItems(options);
        }

        return this;
      };
      /**
       * Returns the wrapper element specified by the user.
       * @ko 컨테이너 엘리먼트를 반환한다.
       */


      __proto.getWrapperElement = function () {
        return this.scrollManager.getWrapper();
      };
      /**
       * Returns the container element corresponding to the scroll area.
       * @ko 스크롤 영역에 해당하는 컨테이너 엘리먼트를 반환한다.
       */


      __proto.getScrollContainerElement = function () {
        return this.scrollManager.getScrollContainer();
      };
      /**
       * Returns the container element containing item elements.
       * @ko 아이템 엘리먼트들을 담긴 컨테이너 엘리먼트를 반환한다.
       */


      __proto.getContainerElement = function () {
        return this.scrollManager.getContainer();
      };
      /**
       * When items change, it synchronizes and renders items.
       * @ko items가 바뀐 경우 동기화를 하고 렌더링을 한다.
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       */


      __proto.syncItems = function (items) {
        this.groupManager.syncItems(items);

        this._syncGroups();

        return this;
      };
      /**
       * Change the currently visible groups.
       * @ko 현재 보이는 그룹들을 바꾼다.
       * @param - first index of visible groups. <ko>보이는 그룹의 첫번째 index.</ko>
       * @param - last index of visible groups. <ko>보이는 그룹의 마지막 index.</ko>
       * @param - Whether the first rendering has already been done. <ko>첫 렌더링이 이미 되어있는지 여부.</ko>
       */


      __proto.setCursors = function (startCursor, endCursor, useFirstRender) {
        this.groupManager.setCursors(startCursor, endCursor);
        this.infinite.setCursors(startCursor, endCursor);

        if (useFirstRender) {
          this._render();
        } else {
          this._update();

          this._checkEndLoading();
        }

        return this;
      };
      /**
       * Returns the first index of visible groups.
       * @ko 보이는 그룹들의 첫번째 index를 반환한다.
       */


      __proto.getStartCursor = function () {
        return this.infinite.getStartCursor();
      };
      /**
       * Returns the last index of visible groups.
       * @ko 보이는 그룹들의 마지막 index를 반환한다.
       */


      __proto.getEndCursor = function () {
        return this.infinite.getEndCursor();
      };
      /**
       * Add items at the bottom(right) of the grid.
       * @ko 아이템들을 grid 아래(오른쪽)에 추가한다.
       * @param - items to be added <ko>추가할 아이템들</ko>
       * @param - The group key to be configured in items. It is automatically generated by default. <ko>추가할 아이템에 설정할 그룹 키. 생략하면 값이 자동으로 생성된다.</ko>
       * @return - An instance of a module itself<ko>모듈 자신의 인스턴스</ko>
       * @example
       * ```js
       * ig.append(`<div class="item">test1</div><div class="item">test2</div>`);
       * ig.append([`<div class="item">test1</div>`, `<div class="item">test2</div>`]);
       * ig.append([HTMLElement1, HTMLElement2]);
       * ```
       */


      __proto.append = function (items, groupKey) {
        return this.insert(-1, items, groupKey);
      };
      /**
       * Add items at the top(left) of the grid.
       * @ko 아이템들을 grid 위(왼쪽)에 추가한다.
       * @param - items to be added <ko>추가할 아이템들</ko>
       * @param - The group key to be configured in items. It is automatically generated by default. <ko>추가할 아이템에 설정할 그룹 키. 생략하면 값이 자동으로 생성된다.</ko>
       * @return - An instance of a module itself<ko>모듈 자신의 인스턴스</ko>
       * @example
       * ```ts
       * ig.prepend(`<div class="item">test1</div><div class="item">test2</div>`);
       * ig.prepend([`<div class="item">test1</div>`, `<div class="item">test2</div>`]);
       * ig.prepend([HTMLElement1, HTMLElement2]);
       * ```
       */


      __proto.prepend = function (items, groupKey) {
        return this.insert(0, items, groupKey);
      };
      /**
       * Add items to a specific index.
       * @ko 아이템들을 특정 index에 추가한다.
       * @param - index to add <ko>추가하기 위한 index</ko>
       * @param - items to be added <ko>추가할 아이템들</ko>
       * @param - The group key to be configured in items. It is automatically generated by default. <ko>추가할 아이템에 설정할 그룹 키. 생략하면 값이 자동으로 생성된다.</ko>
       * @return - An instance of a module itself<ko>모듈 자신의 인스턴스</ko>
       * @example
       * ```ts
       * ig.insert(2, `<div class="item">test1</div><div class="item">test2</div>`);
       * ig.insert(3, [`<div class="item">test1</div>`, `<div class="item">test2</div>`]);
       * ig.insert(4, [HTMLElement1, HTMLElement2]);
       * ```
       */


      __proto.insert = function (index, items, groupKey) {
        var nextItemInfos = this.groupManager.getGroupItems();
        var itemInfos = convertInsertedItems(items, groupKey);

        if (index === -1) {
          nextItemInfos.push.apply(nextItemInfos, itemInfos);
        } else {
          nextItemInfos.splice.apply(nextItemInfos, __spreadArrays([index, 0], itemInfos));
        }

        return this.syncItems(nextItemInfos);
      };
      /**
       * Returns the current state of a module such as location information. You can use the setStatus() method to restore the information returned through a call to this method.
       * @ko 아이템의 위치 정보 등 모듈의 현재 상태 정보를 반환한다. 이 메서드가 반환한 정보를 저장해 두었다가 setStatus() 메서드로 복원할 수 있다
       * @param - STATUS_TYPE.NOT_REMOVE = Get all information about items. STATUS_TYPE.REMOVE_INVISIBLE_ITEMS = Get information on visible items only. STATUS_TYPE.MINIMIZE_INVISIBLE_ITEMS = Compress invisible items. You can replace it with a placeholder. STATUS_TYPE.MINIMIZE_INVISIBLE_GROUPS = Compress invisible groups. <ko> STATUS_TYPE.NOT_REMOVE = 모든 아이템들의 정보를 가져온다. STATUS_TYPE.REMOVE_INVISIBLE_ITEMS = 보이는 아이템들의 정보만 가져온다. STATUS_TYPE.MINIMIZE_INVISIBLE_ITEMS = 안보이는 아이템들을 압축한다. placeholder로 대체가 가능하다. STATUS_TYPE.MINIMIZE_INVISIBLE_GROUPS = 안보이는 그룹을 압축한다.</ko>
       */


      __proto.getStatus = function (type) {
        return {
          containerManager: this.containerManager.getStatus(),
          itemRenderer: this.itemRenderer.getStatus(),
          groupManager: this.groupManager.getGroupStatus(type),
          scrollManager: this.scrollManager.getStatus()
        };
      };
      /**
       * You can set placeholders to restore status or wait for items to be added.
       * @ko status 복구 또는 아이템 추가 대기를 위한 placeholder를 설정할 수 있다.
       * @param - The placeholder status. <ko>placeholder의 status</ko>
       */


      __proto.setPlaceholder = function (info) {
        this.groupManager.setPlaceholder(info);
        return this;
      };
      /**
       * You can set placeholders to restore status or wait for items to be added.
       * @ko status 복구 또는 아이템 추가 대기를 위한 placeholder를 설정할 수 있다.
       * @param - The placeholder status. <ko>placeholder의 status</ko>
       */


      __proto.setLoading = function (info) {
        this.groupManager.setLoading(info);
        return this;
      };
      /**
       * Add the placeholder at the end.
       * @ko placeholder들을 마지막에 추가한다.
       * @param - Items that correspond to placeholders. If it is a number, it duplicates the number of copies. <ko>placeholder에 해당하는 아이템들. 숫자면 갯수만큼 복제를 한다.</ko>
       * @param - The group key to be configured in items. It is automatically generated by default. <ko>추가할 아이템에 설정할 그룹 키. 생략하면 값이 자동으로 생성된다.</ko>
       */


      __proto.appendPlaceholders = function (items, groupKey) {
        var _this = this;

        var result = this.groupManager.appendPlaceholders(items, groupKey);

        this._syncGroups(true);

        return __assign(__assign({}, result), {
          remove: function () {
            _this.removePlaceholders({
              groupKey: result.group.groupKey
            });
          }
        });
      };
      /**
       * Add the placeholder at the start.
       * @ko placeholder들을 처음에 추가한다.
       * @param - Items that correspond to placeholders. If it is a number, it duplicates the number of copies. <ko>placeholder에 해당하는 아이템들. 숫자면 갯수만큼 복제를 한다.</ko>
       * @param - The group key to be configured in items. It is automatically generated by default. <ko>추가할 아이템에 설정할 그룹 키. 생략하면 값이 자동으로 생성된다.</ko>
       */


      __proto.prependPlaceholders = function (items, groupKey) {
        var _this = this;

        var result = this.groupManager.prependPlaceholders(items, groupKey);

        this._syncGroups(true);

        return __assign(__assign({}, result), {
          remove: function () {
            _this.removePlaceholders({
              groupKey: result.group.groupKey
            });
          }
        });
      };
      /**
       * Remove placeholders
       * @ko placeholder들을 삭제한다.
       * @param type - Remove the placeholders corresponding to the groupkey. When "start" or "end", remove all placeholders in that direction. <ko>groupkey에 해당하는 placeholder들을 삭제한다. "start" 또는 "end" 일 때 해당 방향의 모든 placeholder들을 삭제한다.</ko>
       */


      __proto.removePlaceholders = function (type) {
        this.groupManager.removePlaceholders(type);

        this._syncGroups(true);
      };
      /**
       * Sets the status of the InfiniteGrid module with the information returned through a call to the getStatus() method.
       * @ko getStatus() 메서드가 저장한 정보로 InfiniteGrid 모듈의 상태를 설정한다.
       * @param - status object of the InfiniteGrid module. <ko>InfiniteGrid 모듈의 status 객체.</ko>
       * @param - Whether the first rendering has already been done. <ko>첫 렌더링이 이미 되어있는지 여부.</ko>
       */


      __proto.setStatus = function (status, useFirstRender) {
        this.itemRenderer.setStatus(status.itemRenderer);
        this.containerManager.setStatus(status.containerManager);
        this.scrollManager.setStatus(status.scrollManager);
        var groupManager = this.groupManager;
        var prevInlineSize = this.containerManager.getInlineSize();
        groupManager.setGroupStatus(status.groupManager);

        this._syncInfinite();

        this.infinite.setCursors(groupManager.getStartCursor(), groupManager.getEndCursor());

        this._getRenderer().updateKey();

        var state = {
          isReisze: this.containerManager.getInlineSize() !== prevInlineSize,
          isRestore: true
        };

        if (useFirstRender) {
          this._render(state);
        } else {
          this._update(state);
        }

        return this;
      };
      /**
       * Removes the group corresponding to index.
       * @ko index에 해당하는 그룹을 제거 한다.
       */


      __proto.removeGroupByIndex = function (index) {
        var nextGroups = this.groupManager.getGroups();
        return this.removeGroupByKey(nextGroups[index].groupKey);
      };
      /**
       * Removes the group corresponding to key.
       * @ko key에 해당하는 그룹을 제거 한다.
       */


      __proto.removeGroupByKey = function (key) {
        var nextItemInfos = this.groupManager.getItems();
        var firstIndex = findIndex(nextItemInfos, function (item) {
          return item.groupKey === key;
        });
        var lastIndex = findLastIndex(nextItemInfos, function (item) {
          return item.groupKey === key;
        });

        if (firstIndex === -1) {
          return this;
        }

        nextItemInfos.splice(firstIndex, lastIndex - firstIndex + 1);
        return this.syncItems(nextItemInfos);
      };
      /**
       * Removes the item corresponding to index.
       * @ko index에 해당하는 아이템을 제거 한다.
       */


      __proto.removeByIndex = function (index) {
        var nextItemInfos = this.getItems(true);
        nextItemInfos.splice(index, 1);
        return this.syncItems(nextItemInfos);
      };
      /**
       * Removes the item corresponding to key.
       * @ko key에 해당하는 아이템을 제거 한다.
       */


      __proto.removeByKey = function (key) {
        var nextItemInfos = this.getItems(true);
        var index = findIndex(nextItemInfos, function (item) {
          return item.key === key;
        });
        return this.removeByIndex(index);
      };
      /**
       * Update the size of the items and render them.
       * @ko 아이템들의 사이즈를 업데이트하고 렌더링을 한다.
       * @param - Items to be updated. <ko>업데이트할 아이템들.</ko>
       * @param - Options for rendering. <ko>렌더링을 하기 위한 옵션.</ko>
       */


      __proto.updateItems = function (items, options) {
        if (options === void 0) {
          options = {};
        }

        this.groupManager.updateItems(items, options);
        return this;
      };
      /**
       * Return all items of InfiniteGrid.
       * @ko InfiniteGrid의 모든 아이템들을 반환한다.
       * @param - Whether to include items corresponding to placeholders. <ko>placeholder에 해당하는 아이템들을 포함할지 여부.</ko>
       */


      __proto.getItems = function (includePlaceholders) {
        return this.groupManager.getGroupItems(includePlaceholders);
      };
      /**
       * Return visible items of InfiniteGrid.
       * @ko InfiniteGrid의 보이는 아이템들을 반환한다.
       * @param - Whether to include items corresponding to placeholders. <ko>placeholder에 해당하는 아이템들을 포함할지 여부.</ko>
       */


      __proto.getVisibleItems = function (includePlaceholders) {
        return this.groupManager.getVisibleItems(includePlaceholders);
      };
      /**
       * Return rendering items of InfiniteGrid.
       * @ko InfiniteGrid의 렌더링 아이템들을 반환한다.
       */


      __proto.getRenderingItems = function () {
        return this.groupManager.getRenderingItems();
      };
      /**
       * Return all groups of InfiniteGrid.
       * @ko InfiniteGrid의 모든 그룹들을 반환한다.
       * @param - Whether to include groups corresponding to placeholders. <ko>placeholder에 해당하는 그룹들을 포함할지 여부.</ko>
       */


      __proto.getGroups = function (includePlaceholders) {
        return this.groupManager.getGroups(includePlaceholders);
      };
      /**
       * Return visible groups of InfiniteGrid.
       * @ko InfiniteGrid의 보이는 그룹들을 반환한다.
       * @param - Whether to include groups corresponding to placeholders. <ko>placeholder에 해당하는 그룹들을 포함할지 여부.</ko>
       */


      __proto.getVisibleGroups = function (includePlaceholders) {
        return this.groupManager.getVisibleGroups(includePlaceholders);
      };
      /**
       * Set to wait to request data.
       * @ko 데이터를 요청하기 위해 대기 상태로 설정한다.
       * @param direction - direction in which data will be added. <ko>데이터를 추가하기 위한 방향.</ko>
       */


      __proto.wait = function (direction) {
        if (direction === void 0) {
          direction = DIRECTION.END;
        }

        this._waitType = direction;

        this._checkStartLoading(direction);
      };
      /**
       * When the data request is complete, it is set to ready state.
       * @ko 데이터 요청이 끝났다면 준비 상태로 설정한다.
       */


      __proto.ready = function () {
        this._waitType = "";
      };
      /**
       * Returns whether it is set to wait to request data.
       * @ko 데이터를 요청하기 위해 대기 상태로 설정되어 있는지 여부를 반환한다.
       */


      __proto.isWait = function () {
        return !!this._waitType;
      };
      /**
       * Releases the instnace and events and returns the CSS of the container and elements.
       * @ko 인스턴스와 이벤트를 해제하고 컨테이너와 엘리먼트들의 CSS를 되돌린다.
       */


      __proto.destroy = function () {
        this.off();
        this.groupManager.destroy();
        this.scrollManager.destroy();
        this.infinite.destroy();
      };

      __proto._getRenderer = function () {
        return this.options.renderer;
      };

      __proto._render = function (state) {
        this._getRenderer().render(this.getRenderingItems().map(function (item) {
          return {
            element: item.element,
            key: item.type + "_" + item.key,
            orgItem: item
          };
        }), state);
      };

      __proto._update = function (state) {
        if (state === void 0) {
          state = {};
        }

        this._getRenderer().update(state);
      };

      __proto._resizeScroll = function () {
        var scrollManager = this.scrollManager;
        scrollManager.resize();
        this.infinite.setSize(scrollManager.getContentSize());
      };

      __proto._syncGroups = function (isUpdate) {
        var infinite = this.infinite;

        this._syncInfinite();

        this.groupManager.setCursors(infinite.getStartCursor(), infinite.getEndCursor());

        if (isUpdate) {
          this._update();
        } else {
          this._render();
        }
      };

      __proto._syncInfinite = function () {
        this.infinite.syncItems(this.getGroups(true).map(function (_a) {
          var groupKey = _a.groupKey,
              grid = _a.grid,
              type = _a.type;
          var outlines = grid.getOutlines();
          return {
            key: groupKey,
            isVirtual: type === GROUP_TYPE.VIRTUAL,
            startOutline: outlines.start,
            endOutline: outlines.end
          };
        }));
      };

      __proto._scroll = function () {
        this.infinite.scroll(this.scrollManager.getRelativeScrollPos());
      };

      __proto._onRequestInsert = function (direction, eventType, e) {
        var _this = this;

        if (this._waitType) {
          this._checkStartLoading(this._waitType);

          return;
        }

        this.trigger(new ComponentEvent$1(eventType, {
          groupKey: e.key,
          nextGroupKey: e.nextKey,
          isVirtual: e.isVirtual,
          wait: function () {
            _this.wait(direction);
          },
          ready: function () {
            _this.ready();
          }
        }));
      };

      __proto._checkStartLoading = function (direction) {
        var groupManager = this.groupManager;
        var infinite = this.infinite;

        if (!groupManager.getLoadingType() && infinite.isLoading(direction) && groupManager.startLoading(direction) && groupManager.hasLoadingItem()) {
          this._update();
        }
      };

      __proto._checkEndLoading = function () {
        var groupManager = this.groupManager;
        var loadingType = this.groupManager.getLoadingType();

        if (loadingType && (!this._waitType || !this.infinite.isLoading(loadingType)) && groupManager.endLoading() && groupManager.hasLoadingItem()) {
          this._update();
        }
      };

      var InfiniteGrid_1;
      InfiniteGrid.defaultOptions = __assign(__assign({}, DEFAULT_GRID_OPTIONS), {
        container: false,
        containerTag: "div",
        renderer: null,
        threshold: 100,
        useRecycle: true
      });
      InfiniteGrid.propertyTypes = INFINITEGRID_PROPERTY_TYPES;
      InfiniteGrid = InfiniteGrid_1 = __decorate([InfiniteGridGetterSetter], InfiniteGrid);
      return InfiniteGrid;
    }(Component);

    /**
     * MasonryInfiniteGrid is a grid that stacks items with the same width as a stack of bricks. Adjust the width of all images to the same size, find the lowest height column, and insert a new item.
     * @ko MasonryInfiniteGrid는 벽돌을 쌓아 올린 모양처럼 동일한 너비를 가진 아이템을 쌓는 레이아웃이다. 모든 이미지의 너비를 동일한 크기로 조정하고, 가장 높이가 낮은 열을 찾아 새로운 이미지를 삽입한다. 따라서 배치된 아이템 사이에 빈 공간이 생기지는 않지만 배치된 레이아웃의 아래쪽은 울퉁불퉁해진다.
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {MasonryInfiniteGridOptions} options - The option object of the MasonryInfiniteGrid module <ko>MasonryInfiniteGrid 모듈의 옵션 객체</ko>
     */

    var MasonryInfiniteGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(MasonryInfiniteGrid, _super);

      function MasonryInfiniteGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      MasonryInfiniteGrid.propertyTypes = __assign(__assign({}, InfiniteGrid.propertyTypes), MasonryGrid.propertyTypes);
      MasonryInfiniteGrid.defaultOptions = __assign(__assign(__assign({}, InfiniteGrid.defaultOptions), MasonryGrid.defaultOptions), {
        gridConstructor: MasonryGrid
      });
      MasonryInfiniteGrid = __decorate([InfiniteGridGetterSetter], MasonryInfiniteGrid);
      return MasonryInfiniteGrid;
    }(InfiniteGrid);

    /**
     * 'justified' is a printing term with the meaning that 'it fits in one row wide'. JustifiedInfiniteGrid is a grid that the item is filled up on the basis of a line given a size.
     * If 'data-grid-inline-offset' or 'data-grid-content-offset' are set for item element, the ratio is maintained except for the offset value.
     * If 'data-grid-maintained-target' is set for an element whose ratio is to be maintained, the item is rendered while maintaining the ratio of the element.
     * @ko 'justified'는 '1행의 너비에 맞게 꼭 들어찬'이라는 의미를 가진 인쇄 용어다. JustifiedInfiniteGrid는 용어의 의미대로 너비가 주어진 사이즈를 기준으로 아이템가 가득 차도록 배치하는 Grid다.
     * 아이템 엘리먼트에 'data-grid-inline-offset' 또는 'data-grid-content-offset'를 설정하면 offset 값을 제외하고 비율을 유지한다.
     * 비율을 유지하고 싶은 엘리먼트에 'data-grid-maintained-target'을 설정한다면 해당 엘리먼트의 비율을 유지하면서 아이템이 렌더링이 된다.
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {JustifiedInfiniteGridOptions} options - The option object of the JustifiedInfiniteGrid module <ko>JustifiedInfiniteGrid 모듈의 옵션 객체</ko>
     */

    var JustifiedInfiniteGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(JustifiedInfiniteGrid, _super);

      function JustifiedInfiniteGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      JustifiedInfiniteGrid.propertyTypes = __assign(__assign({}, InfiniteGrid.propertyTypes), JustifiedGrid.propertyTypes);
      JustifiedInfiniteGrid.defaultOptions = __assign(__assign(__assign({}, InfiniteGrid.defaultOptions), JustifiedGrid.defaultOptions), {
        gridConstructor: JustifiedGrid
      });
      JustifiedInfiniteGrid = __decorate([InfiniteGridGetterSetter], JustifiedInfiniteGrid);
      return JustifiedInfiniteGrid;
    }(InfiniteGrid);

    /**
     * 'Frame' is a printing term with the meaning that 'it fits in one row wide'. FrameInfiniteGrid is a grid that the item is filled up on the basis of a line given a size.
     * @ko 'Frame'는 '1행의 너비에 맞게 꼭 들어찬'이라는 의미를 가진 인쇄 용어다. FrameInfiniteGrid는 용어의 의미대로 너비가 주어진 사이즈를 기준으로 아이템이 가득 차도록 배치하는 Grid다.
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {FrameInfiniteGridOptions} options - The option object of the FrameInfiniteGrid module <ko>FrameGrid 모듈의 옵션 객체</ko>
     */

    var FrameInfiniteGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(FrameInfiniteGrid, _super);

      function FrameInfiniteGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      FrameInfiniteGrid.propertyTypes = __assign(__assign({}, InfiniteGrid.propertyTypes), FrameGrid.propertyTypes);
      FrameInfiniteGrid.defaultOptions = __assign(__assign(__assign({}, InfiniteGrid.defaultOptions), FrameGrid.defaultOptions), {
        gridConstructor: FrameGrid
      });
      FrameInfiniteGrid = __decorate([InfiniteGridGetterSetter], FrameInfiniteGrid);
      return FrameInfiniteGrid;
    }(InfiniteGrid);

    /**
     * The PackingInfiniteGrid is a grid that shows the important items bigger without sacrificing the weight of the items.
     * Rows and columns are separated so that items are dynamically placed within the horizontal and vertical space rather than arranged in an orderly fashion.
     * If `sizeWeight` is higher than `ratioWeight`, the size of items is preserved as much as possible.
     * Conversely, if `ratioWeight` is higher than `sizeWeight`, the ratio of items is preserved as much as possible.
     * @ko PackingInfiniteGrid는 아이템의 본래 크기에 따른 비중을 해치지 않으면서 중요한 카드는 더 크게 보여 주는 레이아웃이다.
     * 행과 열이 구분돼 아이템을 정돈되게 배치하는 대신 가로세로 일정 공간 내에서 동적으로 아이템을 배치한다.
     * `sizeWeight`가 `ratioWeight`보다 높으면 아이템들의 size가 최대한 보존이 된다.
     * 반대로 `ratioWeight`가 `sizeWeight`보다 높으면 아이템들의 비율이 최대한 보존이 된다.
     * @param {HTMLElement | string} container - A base element for a module <ko>모듈을 적용할 기준 엘리먼트</ko>
     * @param {PackingInfiniteGridOptions} options - The option object of the PackingInfiniteGrid module <ko>PackingInfiniteGrid 모듈의 옵션 객체</ko>
     */

    var PackingInfiniteGrid =
    /*#__PURE__*/
    function (_super) {
      __extends(PackingInfiniteGrid, _super);

      function PackingInfiniteGrid() {
        return _super !== null && _super.apply(this, arguments) || this;
      }

      PackingInfiniteGrid.propertyTypes = __assign(__assign({}, InfiniteGrid.propertyTypes), PackingGrid.propertyTypes);
      PackingInfiniteGrid.defaultOptions = __assign(__assign(__assign({}, InfiniteGrid.defaultOptions), PackingGrid.defaultOptions), {
        gridConstructor: PackingGrid
      });
      PackingInfiniteGrid = __decorate([InfiniteGridGetterSetter], PackingInfiniteGrid);
      return PackingInfiniteGrid;
    }(InfiniteGrid);



    var modules = {
        __proto__: null,
        'default': InfiniteGrid,
        withInfiniteGridMethods: withInfiniteGridMethods,
        getRenderingItems: getRenderingItems,
        mountRenderingItems: mountRenderingItems,
        InfiniteGridItem: InfiniteGridItem,
        MasonryInfiniteGrid: MasonryInfiniteGrid,
        JustifiedInfiniteGrid: JustifiedInfiniteGrid,
        FrameInfiniteGrid: FrameInfiniteGrid,
        PackingInfiniteGrid: PackingInfiniteGrid,
        Renderer: Renderer,
        IS_IOS: IS_IOS,
        CONTAINER_CLASS_NAME: CONTAINER_CLASS_NAME,
        IGNORE_PROPERITES_MAP: IGNORE_PROPERITES_MAP,
        INFINITEGRID_PROPERTY_TYPES: INFINITEGRID_PROPERTY_TYPES,
        DIRECTION: DIRECTION,
        INFINITEGRID_EVENTS: INFINITEGRID_EVENTS,
        ITEM_INFO_PROPERTIES: ITEM_INFO_PROPERTIES,
        INFINITEGRID_METHODS: INFINITEGRID_METHODS,
        get GROUP_TYPE () { return GROUP_TYPE; },
        get ITEM_TYPE () { return ITEM_TYPE; },
        get STATUS_TYPE () { return STATUS_TYPE; },
        INVISIBLE_POS: INVISIBLE_POS
    };

    for (var name in modules) {
      InfiniteGrid[name] = modules[name];
    }

    return InfiniteGrid;

})));
//# sourceMappingURL=infinitegrid.js.map