@better-scroll/core/dist/core.js

/*!
 * better-scroll / core
 * (c) 2016-2023 ustbhuangyi
 * Released under the MIT License.
 */
(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
    typeof define === 'function' && define.amd ? define(['exports'], factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.BScroll = {}));
})(this, (function (exports) { '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) {
        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 __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;
    }

    var propertiesConfig = [
        {
            sourceKey: 'scroller.scrollBehaviorX.currentPos',
            key: 'x'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.currentPos',
            key: 'y'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.hasScroll',
            key: 'hasHorizontalScroll'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.hasScroll',
            key: 'hasVerticalScroll'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.contentSize',
            key: 'scrollerWidth'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.contentSize',
            key: 'scrollerHeight'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.maxScrollPos',
            key: 'maxScrollX'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.maxScrollPos',
            key: 'maxScrollY'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.minScrollPos',
            key: 'minScrollX'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.minScrollPos',
            key: 'minScrollY'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.movingDirection',
            key: 'movingDirectionX'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.movingDirection',
            key: 'movingDirectionY'
        },
        {
            sourceKey: 'scroller.scrollBehaviorX.direction',
            key: 'directionX'
        },
        {
            sourceKey: 'scroller.scrollBehaviorY.direction',
            key: 'directionY'
        },
        {
            sourceKey: 'scroller.actions.enabled',
            key: 'enabled'
        },
        {
            sourceKey: 'scroller.animater.pending',
            key: 'pending'
        },
        {
            sourceKey: 'scroller.animater.stop',
            key: 'stop'
        },
        {
            sourceKey: 'scroller.scrollTo',
            key: 'scrollTo'
        },
        {
            sourceKey: 'scroller.scrollBy',
            key: 'scrollBy'
        },
        {
            sourceKey: 'scroller.scrollToElement',
            key: 'scrollToElement'
        },
        {
            sourceKey: 'scroller.resetPosition',
            key: 'resetPosition'
        }
    ];

    function warn(msg) {
        console.error("[BScroll warn]: " + msg);
    }

    // ssr support
    var inBrowser = typeof window !== 'undefined';
    var ua = inBrowser && navigator.userAgent.toLowerCase();
    var isWeChatDevTools = !!(ua && /wechatdevtools/.test(ua));
    var isAndroid = ua && ua.indexOf('android') > 0;
    /* istanbul ignore next */
    var isIOSBadVersion = (function () {
        if (typeof ua === 'string') {
            var regex = /os (\d\d?_\d(_\d)?)/;
            var matches = regex.exec(ua);
            if (!matches)
                return false;
            var parts = matches[1].split('_').map(function (item) {
                return parseInt(item, 10);
            });
            // ios version >= 13.4 issue 982
            return !!(parts[0] === 13 && parts[1] >= 4);
        }
        return false;
    })();
    /* istanbul ignore next */
    var supportsPassive = false;
    /* istanbul ignore next */
    if (inBrowser) {
        var EventName = 'test-passive';
        try {
            var opts = {};
            Object.defineProperty(opts, 'passive', {
                get: function () {
                    supportsPassive = true;
                },
            }); // https://github.com/facebook/flow/issues/285
            window.addEventListener(EventName, function () { }, opts);
        }
        catch (e) { }
    }

    function getNow() {
        return window.performance &&
            window.performance.now &&
            window.performance.timing
            ? window.performance.now() + window.performance.timing.navigationStart
            : +new Date();
    }
    var extend = function (target, source) {
        for (var key in source) {
            target[key] = source[key];
        }
        return target;
    };
    function isUndef(v) {
        return v === undefined || v === null;
    }
    function between(x, min, max) {
        if (x < min) {
            return min;
        }
        if (x > max) {
            return max;
        }
        return x;
    }

    var elementStyle = (inBrowser &&
        document.createElement('div').style);
    var vendor = (function () {
        /* istanbul ignore if  */
        if (!inBrowser) {
            return false;
        }
        var transformNames = [
            {
                key: 'standard',
                value: 'transform',
            },
            {
                key: 'webkit',
                value: 'webkitTransform',
            },
            {
                key: 'Moz',
                value: 'MozTransform',
            },
            {
                key: 'O',
                value: 'OTransform',
            },
            {
                key: 'ms',
                value: 'msTransform',
            },
        ];
        for (var _i = 0, transformNames_1 = transformNames; _i < transformNames_1.length; _i++) {
            var obj = transformNames_1[_i];
            if (elementStyle[obj.value] !== undefined) {
                return obj.key;
            }
        }
        /* istanbul ignore next  */
        return false;
    })();
    /* istanbul ignore next  */
    function prefixStyle(style) {
        if (vendor === false) {
            return style;
        }
        if (vendor === 'standard') {
            if (style === 'transitionEnd') {
                return 'transitionend';
            }
            return style;
        }
        return vendor + style.charAt(0).toUpperCase() + style.substr(1);
    }
    function getElement(el) {
        return (typeof el === 'string' ? document.querySelector(el) : el);
    }
    function addEvent(el, type, fn, capture) {
        var useCapture = supportsPassive
            ? {
                passive: false,
                capture: !!capture,
            }
            : !!capture;
        el.addEventListener(type, fn, useCapture);
    }
    function removeEvent(el, type, fn, capture) {
        el.removeEventListener(type, fn, {
            capture: !!capture,
        });
    }
    function maybePrevent(e) {
        if (e.cancelable) {
            e.preventDefault();
        }
    }
    function offset(el) {
        var left = 0;
        var top = 0;
        while (el) {
            left -= el.offsetLeft;
            top -= el.offsetTop;
            el = el.offsetParent;
        }
        return {
            left: left,
            top: top,
        };
    }
    vendor && vendor !== 'standard' ? '-' + vendor.toLowerCase() + '-' : '';
    var transform = prefixStyle('transform');
    var transition = prefixStyle('transition');
    var hasPerspective = inBrowser && prefixStyle('perspective') in elementStyle;
    // fix issue #361
    var hasTouch = inBrowser && ('ontouchstart' in window || isWeChatDevTools);
    var hasTransition = inBrowser && transition in elementStyle;
    var style = {
        transform: transform,
        transition: transition,
        transitionTimingFunction: prefixStyle('transitionTimingFunction'),
        transitionDuration: prefixStyle('transitionDuration'),
        transitionDelay: prefixStyle('transitionDelay'),
        transformOrigin: prefixStyle('transformOrigin'),
        transitionEnd: prefixStyle('transitionEnd'),
        transitionProperty: prefixStyle('transitionProperty'),
    };
    var eventTypeMap = {
        touchstart: 1,
        touchmove: 1,
        touchend: 1,
        touchcancel: 1,
        mousedown: 2,
        mousemove: 2,
        mouseup: 2,
    };
    function getRect(el) {
        /* istanbul ignore if  */
        if (el instanceof window.SVGElement) {
            var rect = el.getBoundingClientRect();
            return {
                top: rect.top,
                left: rect.left,
                width: rect.width,
                height: rect.height,
            };
        }
        else {
            return {
                top: el.offsetTop,
                left: el.offsetLeft,
                width: el.offsetWidth,
                height: el.offsetHeight,
            };
        }
    }
    function preventDefaultExceptionFn(el, exceptions) {
        for (var i in exceptions) {
            if (exceptions[i].test(el[i])) {
                return true;
            }
        }
        return false;
    }
    var tagExceptionFn = preventDefaultExceptionFn;
    function tap(e, eventName) {
        var ev = document.createEvent('Event');
        ev.initEvent(eventName, true, true);
        ev.pageX = e.pageX;
        ev.pageY = e.pageY;
        e.target.dispatchEvent(ev);
    }
    function click(e, event) {
        if (event === void 0) { event = 'click'; }
        var eventSource;
        if (e.type === 'mouseup') {
            eventSource = e;
        }
        else if (e.type === 'touchend' || e.type === 'touchcancel') {
            eventSource = e.changedTouches[0];
        }
        var posSrc = {};
        if (eventSource) {
            posSrc.screenX = eventSource.screenX || 0;
            posSrc.screenY = eventSource.screenY || 0;
            posSrc.clientX = eventSource.clientX || 0;
            posSrc.clientY = eventSource.clientY || 0;
        }
        var ev;
        var bubbles = true;
        var cancelable = true;
        var ctrlKey = e.ctrlKey, shiftKey = e.shiftKey, altKey = e.altKey, metaKey = e.metaKey;
        var pressedKeysMap = {
            ctrlKey: ctrlKey,
            shiftKey: shiftKey,
            altKey: altKey,
            metaKey: metaKey,
        };
        if (typeof MouseEvent !== 'undefined') {
            try {
                ev = new MouseEvent(event, extend(__assign({ bubbles: bubbles,
                    cancelable: cancelable }, pressedKeysMap), posSrc));
            }
            catch (e) {
                /* istanbul ignore next */
                createEvent();
            }
        }
        else {
            createEvent();
        }
        function createEvent() {
            ev = document.createEvent('Event');
            ev.initEvent(event, bubbles, cancelable);
            extend(ev, posSrc);
        }
        // forwardedTouchEvent set to true in case of the conflict with fastclick
        ev.forwardedTouchEvent = true;
        ev._constructed = true;
        e.target.dispatchEvent(ev);
    }
    function dblclick(e) {
        click(e, 'dblclick');
    }

    var ease = {
        // easeOutQuint
        swipe: {
            style: 'cubic-bezier(0.23, 1, 0.32, 1)',
            fn: function (t) {
                return 1 + --t * t * t * t * t;
            }
        },
        // easeOutQuard
        swipeBounce: {
            style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
            fn: function (t) {
                return t * (2 - t);
            }
        },
        // easeOutQuart
        bounce: {
            style: 'cubic-bezier(0.165, 0.84, 0.44, 1)',
            fn: function (t) {
                return 1 - --t * t * t * t;
            }
        }
    };

    var DEFAULT_INTERVAL = 1000 / 60;
    var windowCompat = inBrowser && window;
    /* istanbul ignore next */
    function noop$1() { }
    var requestAnimationFrame = (function () {
        /* istanbul ignore if  */
        if (!inBrowser) {
            return noop$1;
        }
        return (windowCompat.requestAnimationFrame ||
            windowCompat.webkitRequestAnimationFrame ||
            windowCompat.mozRequestAnimationFrame ||
            windowCompat.oRequestAnimationFrame ||
            // if all else fails, use setTimeout
            function (callback) {
                return window.setTimeout(callback, callback.interval || DEFAULT_INTERVAL); // make interval as precise as possible.
            });
    })();
    var cancelAnimationFrame = (function () {
        /* istanbul ignore if  */
        if (!inBrowser) {
            return noop$1;
        }
        return (windowCompat.cancelAnimationFrame ||
            windowCompat.webkitCancelAnimationFrame ||
            windowCompat.mozCancelAnimationFrame ||
            windowCompat.oCancelAnimationFrame ||
            function (id) {
                window.clearTimeout(id);
            });
    })();

    /* istanbul ignore next */
    var noop = function (val) { };
    var sharedPropertyDefinition = {
        enumerable: true,
        configurable: true,
        get: noop,
        set: noop,
    };
    var getProperty = function (obj, key) {
        var keys = key.split('.');
        for (var i = 0; i < keys.length - 1; i++) {
            obj = obj[keys[i]];
            if (typeof obj !== 'object' || !obj)
                return;
        }
        var lastKey = keys.pop();
        if (typeof obj[lastKey] === 'function') {
            return function () {
                return obj[lastKey].apply(obj, arguments);
            };
        }
        else {
            return obj[lastKey];
        }
    };
    var setProperty = function (obj, key, value) {
        var keys = key.split('.');
        var temp;
        for (var i = 0; i < keys.length - 1; i++) {
            temp = keys[i];
            if (!obj[temp])
                obj[temp] = {};
            obj = obj[temp];
        }
        obj[keys.pop()] = value;
    };
    function propertiesProxy(target, sourceKey, key) {
        sharedPropertyDefinition.get = function proxyGetter() {
            return getProperty(this, sourceKey);
        };
        sharedPropertyDefinition.set = function proxySetter(val) {
            setProperty(this, sourceKey, val);
        };
        Object.defineProperty(target, key, sharedPropertyDefinition);
    }

    var EventEmitter = /** @class */ (function () {
        function EventEmitter(names) {
            this.events = {};
            this.eventTypes = {};
            this.registerType(names);
        }
        EventEmitter.prototype.on = function (type, fn, context) {
            if (context === void 0) { context = this; }
            this.hasType(type);
            if (!this.events[type]) {
                this.events[type] = [];
            }
            this.events[type].push([fn, context]);
            return this;
        };
        EventEmitter.prototype.once = function (type, fn, context) {
            var _this = this;
            if (context === void 0) { context = this; }
            this.hasType(type);
            var magic = function () {
                var args = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    args[_i] = arguments[_i];
                }
                _this.off(type, magic);
                var ret = fn.apply(context, args);
                if (ret === true) {
                    return ret;
                }
            };
            magic.fn = fn;
            this.on(type, magic);
            return this;
        };
        EventEmitter.prototype.off = function (type, fn) {
            if (!type && !fn) {
                this.events = {};
                return this;
            }
            if (type) {
                this.hasType(type);
                if (!fn) {
                    this.events[type] = [];
                    return this;
                }
                var events = this.events[type];
                if (!events) {
                    return this;
                }
                var count = events.length;
                while (count--) {
                    if (events[count][0] === fn ||
                        (events[count][0] && events[count][0].fn === fn)) {
                        events.splice(count, 1);
                    }
                }
                return this;
            }
        };
        EventEmitter.prototype.trigger = function (type) {
            var args = [];
            for (var _i = 1; _i < arguments.length; _i++) {
                args[_i - 1] = arguments[_i];
            }
            this.hasType(type);
            var events = this.events[type];
            if (!events) {
                return;
            }
            var len = events.length;
            var eventsCopy = __spreadArrays(events);
            var ret;
            for (var i = 0; i < len; i++) {
                var event_1 = eventsCopy[i];
                var fn = event_1[0], context = event_1[1];
                if (fn) {
                    ret = fn.apply(context, args);
                    if (ret === true) {
                        return ret;
                    }
                }
            }
        };
        EventEmitter.prototype.registerType = function (names) {
            var _this = this;
            names.forEach(function (type) {
                _this.eventTypes[type] = type;
            });
        };
        EventEmitter.prototype.destroy = function () {
            this.events = {};
            this.eventTypes = {};
        };
        EventEmitter.prototype.hasType = function (type) {
            var types = this.eventTypes;
            var isType = types[type] === type;
            if (!isType) {
                warn("EventEmitter has used unknown event type: \"" + type + "\", should be oneof [" +
                    ("" + Object.keys(types).map(function (_) { return JSON.stringify(_); })) +
                    "]");
            }
        };
        return EventEmitter;
    }());
    var EventRegister = /** @class */ (function () {
        function EventRegister(wrapper, events) {
            this.wrapper = wrapper;
            this.events = events;
            this.addDOMEvents();
        }
        EventRegister.prototype.destroy = function () {
            this.removeDOMEvents();
            this.events = [];
        };
        EventRegister.prototype.addDOMEvents = function () {
            this.handleDOMEvents(addEvent);
        };
        EventRegister.prototype.removeDOMEvents = function () {
            this.handleDOMEvents(removeEvent);
        };
        EventRegister.prototype.handleDOMEvents = function (eventOperation) {
            var _this = this;
            var wrapper = this.wrapper;
            this.events.forEach(function (event) {
                eventOperation(wrapper, event.name, _this, !!event.capture);
            });
        };
        EventRegister.prototype.handleEvent = function (e) {
            var eventType = e.type;
            this.events.some(function (event) {
                if (event.name === eventType) {
                    event.handler(e);
                    return true;
                }
                return false;
            });
        };
        return EventRegister;
    }());

    var CustomOptions = /** @class */ (function () {
        function CustomOptions() {
        }
        return CustomOptions;
    }());
    var OptionsConstructor = /** @class */ (function (_super) {
        __extends(OptionsConstructor, _super);
        function OptionsConstructor() {
            var _this = _super.call(this) || this;
            _this.startX = 0;
            _this.startY = 0;
            _this.scrollX = false;
            _this.scrollY = true;
            _this.freeScroll = false;
            _this.directionLockThreshold = 0;
            _this.eventPassthrough = "" /* None */;
            _this.click = false;
            _this.dblclick = false;
            _this.tap = '';
            _this.bounce = {
                top: true,
                bottom: true,
                left: true,
                right: true,
            };
            _this.bounceTime = 800;
            _this.momentum = true;
            _this.momentumLimitTime = 300;
            _this.momentumLimitDistance = 15;
            _this.swipeTime = 2500;
            _this.swipeBounceTime = 500;
            _this.deceleration = 0.0015;
            _this.flickLimitTime = 200;
            _this.flickLimitDistance = 100;
            _this.resizePolling = 60;
            _this.probeType = 0 /* Default */;
            _this.stopPropagation = false;
            _this.preventDefault = true;
            _this.preventDefaultException = {
                tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT|AUDIO)$/,
            };
            _this.tagException = {
                tagName: /^TEXTAREA$/,
            };
            _this.HWCompositing = true;
            _this.useTransition = true;
            _this.bindToWrapper = false;
            _this.bindToTarget = false;
            _this.disableMouse = hasTouch;
            _this.disableTouch = !hasTouch;
            _this.autoBlur = true;
            _this.autoEndDistance = 5;
            _this.outOfBoundaryDampingFactor = 1 / 3;
            _this.specifiedIndexAsContent = 0;
            _this.quadrant = 1 /* First */;
            return _this;
        }
        OptionsConstructor.prototype.merge = function (options) {
            if (!options)
                return this;
            for (var key in options) {
                if (key === 'bounce') {
                    this.bounce = this.resolveBounce(options[key]);
                    continue;
                }
                this[key] = options[key];
            }
            return this;
        };
        OptionsConstructor.prototype.process = function () {
            this.translateZ =
                this.HWCompositing && hasPerspective ? ' translateZ(1px)' : '';
            this.useTransition = this.useTransition && hasTransition;
            this.preventDefault = !this.eventPassthrough && this.preventDefault;
            // If you want eventPassthrough I have to lock one of the axes
            this.scrollX =
                this.eventPassthrough === "horizontal" /* Horizontal */
                    ? false
                    : this.scrollX;
            this.scrollY =
                this.eventPassthrough === "vertical" /* Vertical */ ? false : this.scrollY;
            // With eventPassthrough we also need lockDirection mechanism
            this.freeScroll = this.freeScroll && !this.eventPassthrough;
            // force true when freeScroll is true
            this.scrollX = this.freeScroll ? true : this.scrollX;
            this.scrollY = this.freeScroll ? true : this.scrollY;
            this.directionLockThreshold = this.eventPassthrough
                ? 0
                : this.directionLockThreshold;
            return this;
        };
        OptionsConstructor.prototype.resolveBounce = function (bounceOptions) {
            var DEFAULT_BOUNCE = {
                top: true,
                right: true,
                bottom: true,
                left: true,
            };
            var NEGATED_BOUNCE = {
                top: false,
                right: false,
                bottom: false,
                left: false,
            };
            var ret;
            if (typeof bounceOptions === 'object') {
                ret = extend(DEFAULT_BOUNCE, bounceOptions);
            }
            else {
                ret = bounceOptions ? DEFAULT_BOUNCE : NEGATED_BOUNCE;
            }
            return ret;
        };
        return OptionsConstructor;
    }(CustomOptions));

    var ActionsHandler = /** @class */ (function () {
        function ActionsHandler(wrapper, options) {
            this.wrapper = wrapper;
            this.options = options;
            this.hooks = new EventEmitter([
                'beforeStart',
                'start',
                'move',
                'end',
                'click',
            ]);
            this.handleDOMEvents();
        }
        ActionsHandler.prototype.handleDOMEvents = function () {
            var _a = this.options, bindToWrapper = _a.bindToWrapper, disableMouse = _a.disableMouse, disableTouch = _a.disableTouch, click = _a.click;
            var wrapper = this.wrapper;
            var target = bindToWrapper ? wrapper : window;
            var wrapperEvents = [];
            var targetEvents = [];
            var shouldRegisterTouch = !disableTouch;
            var shouldRegisterMouse = !disableMouse;
            if (click) {
                wrapperEvents.push({
                    name: 'click',
                    handler: this.click.bind(this),
                    capture: true,
                });
            }
            if (shouldRegisterTouch) {
                wrapperEvents.push({
                    name: 'touchstart',
                    handler: this.start.bind(this),
                });
                targetEvents.push({
                    name: 'touchmove',
                    handler: this.move.bind(this),
                }, {
                    name: 'touchend',
                    handler: this.end.bind(this),
                }, {
                    name: 'touchcancel',
                    handler: this.end.bind(this),
                });
            }
            if (shouldRegisterMouse) {
                wrapperEvents.push({
                    name: 'mousedown',
                    handler: this.start.bind(this),
                });
                targetEvents.push({
                    name: 'mousemove',
                    handler: this.move.bind(this),
                }, {
                    name: 'mouseup',
                    handler: this.end.bind(this),
                });
            }
            this.wrapperEventRegister = new EventRegister(wrapper, wrapperEvents);
            this.targetEventRegister = new EventRegister(target, targetEvents);
        };
        ActionsHandler.prototype.beforeHandler = function (e, type) {
            var _a = this.options, preventDefault = _a.preventDefault, stopPropagation = _a.stopPropagation, preventDefaultException = _a.preventDefaultException;
            var preventDefaultConditions = {
                start: function () {
                    return (preventDefault &&
                        !preventDefaultExceptionFn(e.target, preventDefaultException));
                },
                end: function () {
                    return (preventDefault &&
                        !preventDefaultExceptionFn(e.target, preventDefaultException));
                },
                move: function () {
                    return preventDefault;
                },
            };
            if (preventDefaultConditions[type]()) {
                e.preventDefault();
            }
            if (stopPropagation) {
                e.stopPropagation();
            }
        };
        ActionsHandler.prototype.setInitiated = function (type) {
            if (type === void 0) { type = 0; }
            this.initiated = type;
        };
        ActionsHandler.prototype.start = function (e) {
            var _eventType = eventTypeMap[e.type];
            if (this.initiated && this.initiated !== _eventType) {
                return;
            }
            this.setInitiated(_eventType);
            // if textarea or other html tags in options.tagException is manipulated
            // do not make bs scroll
            if (tagExceptionFn(e.target, this.options.tagException)) {
                this.setInitiated();
                return;
            }
            // only allow mouse left button
            if (_eventType === 2 /* Mouse */ && e.button !== 0 /* Left */)
                return;
            if (this.hooks.trigger(this.hooks.eventTypes.beforeStart, e)) {
                return;
            }
            this.beforeHandler(e, 'start');
            var point = (e.touches ? e.touches[0] : e);
            this.pointX = point.pageX;
            this.pointY = point.pageY;
            this.hooks.trigger(this.hooks.eventTypes.start, e);
        };
        ActionsHandler.prototype.move = function (e) {
            if (eventTypeMap[e.type] !== this.initiated) {
                return;
            }
            this.beforeHandler(e, 'move');
            var point = (e.touches ? e.touches[0] : e);
            var deltaX = point.pageX - this.pointX;
            var deltaY = point.pageY - this.pointY;
            this.pointX = point.pageX;
            this.pointY = point.pageY;
            if (this.hooks.trigger(this.hooks.eventTypes.move, {
                deltaX: deltaX,
                deltaY: deltaY,
                e: e,
            })) {
                return;
            }
            // auto end when out of viewport
            var scrollLeft = document.documentElement.scrollLeft ||
                window.pageXOffset ||
                document.body.scrollLeft;
            var scrollTop = document.documentElement.scrollTop ||
                window.pageYOffset ||
                document.body.scrollTop;
            var pX = this.pointX - scrollLeft;
            var pY = this.pointY - scrollTop;
            var autoEndDistance = this.options.autoEndDistance;
            if (pX > document.documentElement.clientWidth - autoEndDistance ||
                pY > document.documentElement.clientHeight - autoEndDistance ||
                pX < autoEndDistance ||
                pY < autoEndDistance) {
                this.end(e);
            }
        };
        ActionsHandler.prototype.end = function (e) {
            if (eventTypeMap[e.type] !== this.initiated) {
                return;
            }
            this.setInitiated();
            this.beforeHandler(e, 'end');
            this.hooks.trigger(this.hooks.eventTypes.end, e);
        };
        ActionsHandler.prototype.click = function (e) {
            this.hooks.trigger(this.hooks.eventTypes.click, e);
        };
        ActionsHandler.prototype.setContent = function (content) {
            if (content !== this.wrapper) {
                this.wrapper = content;
                this.rebindDOMEvents();
            }
        };
        ActionsHandler.prototype.rebindDOMEvents = function () {
            this.wrapperEventRegister.destroy();
            this.targetEventRegister.destroy();
            this.handleDOMEvents();
        };
        ActionsHandler.prototype.destroy = function () {
            this.wrapperEventRegister.destroy();
            this.targetEventRegister.destroy();
            this.hooks.destroy();
        };
        return ActionsHandler;
    }());

    var translaterMetaData = {
        x: ['translateX', 'px'],
        y: ['translateY', 'px'],
    };
    var Translater = /** @class */ (function () {
        function Translater(content) {
            this.setContent(content);
            this.hooks = new EventEmitter(['beforeTranslate', 'translate']);
        }
        Translater.prototype.getComputedPosition = function () {
            var cssStyle = window.getComputedStyle(this.content, null);
            var matrix = cssStyle[style.transform].split(')')[0].split(', ');
            var x = +(matrix[12] || matrix[4]) || 0;
            var y = +(matrix[13] || matrix[5]) || 0;
            return {
                x: x,
                y: y,
            };
        };
        Translater.prototype.translate = function (point) {
            var transformStyle = [];
            Object.keys(point).forEach(function (key) {
                if (!translaterMetaData[key]) {
                    return;
                }
                var transformFnName = translaterMetaData[key][0];
                if (transformFnName) {
                    var transformFnArgUnit = translaterMetaData[key][1];
                    var transformFnArg = point[key];
                    transformStyle.push(transformFnName + "(" + transformFnArg + transformFnArgUnit + ")");
                }
            });
            this.hooks.trigger(this.hooks.eventTypes.beforeTranslate, transformStyle, point);
            this.style[style.transform] = transformStyle.join(' ');
            this.hooks.trigger(this.hooks.eventTypes.translate, point);
        };
        Translater.prototype.setContent = function (content) {
            if (this.content !== content) {
                this.content = content;
                this.style = content.style;
            }
        };
        Translater.prototype.destroy = function () {
            this.hooks.destroy();
        };
        return Translater;
    }());

    var Base = /** @class */ (function () {
        function Base(content, translater, options) {
            this.translater = translater;
            this.options = options;
            this.timer = 0;
            this.hooks = new EventEmitter([
                'move',
                'end',
                'beforeForceStop',
                'forceStop',
                'callStop',
                'time',
                'timeFunction',
            ]);
            this.setContent(content);
        }
        Base.prototype.translate = function (endPoint) {
            this.translater.translate(endPoint);
        };
        Base.prototype.setPending = function (pending) {
            this.pending = pending;
        };
        Base.prototype.setForceStopped = function (forceStopped) {
            this.forceStopped = forceStopped;
        };
        Base.prototype.setCallStop = function (called) {
            this.callStopWhenPending = called;
        };
        Base.prototype.setContent = function (content) {
            if (this.content !== content) {
                this.content = content;
                this.style = content.style;
                this.stop();
            }
        };
        Base.prototype.clearTimer = function () {
            if (this.timer) {
                cancelAnimationFrame(this.timer);
                this.timer = 0;
            }
        };
        Base.prototype.destroy = function () {
            this.hooks.destroy();
            cancelAnimationFrame(this.timer);
        };
        return Base;
    }());

    // iOS 13.6 - 14.x, window.getComputedStyle sometimes will get wrong transform value
    // when bs use transition mode
    // eg: translateY -100px -> -200px, when the last frame which is about to scroll to -200px
    // window.getComputedStyle(this.content) will calculate transformY to be -100px(startPoint)
    // it is weird
    // so we should validate position caculated by 'window.getComputedStyle'
    var isValidPostion = function (startPoint, endPoint, currentPos, prePos) {
        var computeDirection = function (endValue, startValue) {
            var delta = endValue - startValue;
            var direction = delta > 0
                ? -1 /* Negative */
                : delta < 0
                    ? 1 /* Positive */
                    : 0 /* Default */;
            return direction;
        };
        var directionX = computeDirection(endPoint.x, startPoint.x);
        var directionY = computeDirection(endPoint.y, startPoint.y);
        var deltaX = currentPos.x - prePos.x;
        var deltaY = currentPos.y - prePos.y;
        return directionX * deltaX <= 0 && directionY * deltaY <= 0;
    };

    var Transition = /** @class */ (function (_super) {
        __extends(Transition, _super);
        function Transition() {
            return _super !== null && _super.apply(this, arguments) || this;
        }
        Transition.prototype.startProbe = function (startPoint, endPoint) {
            var _this = this;
            var prePos = startPoint;
            var probe = function () {
                var pos = _this.translater.getComputedPosition();
                if (isValidPostion(startPoint, endPoint, pos, prePos)) {
                    _this.hooks.trigger(_this.hooks.eventTypes.move, pos);
                }
                // call bs.stop() should not dispatch end hook again.
                // forceStop hook will do this.
                /* istanbul ignore if  */
                if (!_this.pending) {
                    if (_this.callStopWhenPending) {
                        _this.callStopWhenPending = false;
                    }
                    else {
                        // transition ends should dispatch end hook.
                        _this.hooks.trigger(_this.hooks.eventTypes.end, pos);
                    }
                }
                prePos = pos;
                if (_this.pending) {
                    _this.timer = requestAnimationFrame(probe);
                }
            };
            // when manually call bs.stop(), then bs.scrollTo()
            // we should reset callStopWhenPending to dispatch end hook
            if (this.callStopWhenPending) {
                this.setCallStop(false);
            }
            cancelAnimationFrame(this.timer);
            probe();
        };
        Transition.prototype.transitionTime = function (time) {
            if (time === void 0) { time = 0; }
            this.style[style.transitionDuration] = time + 'ms';
            this.hooks.trigger(this.hooks.eventTypes.time, time);
        };
        Transition.prototype.transitionTimingFunction = function (easing) {
            this.style[style.transitionTimingFunction] = easing;
            this.hooks.trigger(this.hooks.eventTypes.timeFunction, easing);
        };
        Transition.prototype.transitionProperty = function () {
            this.style[style.transitionProperty] = style.transform;
        };
        Transition.prototype.move = function (startPoint, endPoint, time, easingFn) {
            this.setPending(time > 0);
            this.transitionTimingFunction(easingFn);
            this.transitionProperty();
            this.transitionTime(time);
            this.translate(endPoint);
            var isRealtimeProbeType = this.options.probeType === 3 /* Realtime */;
            if (time && isRealtimeProbeType) {
                this.startProbe(startPoint, endPoint);
            }
            // if we change content's transformY in a tick
            // such as: 0 -> 50px -> 0
            // transitionend will not be triggered
            // so we forceupdate by reflow
            if (!time) {
                this._reflow = this.content.offsetHeight;
                if (isRealtimeProbeType) {
                    this.hooks.trigger(this.hooks.eventTypes.move, endPoint);
                }
                this.hooks.trigger(this.hooks.eventTypes.end, endPoint);
            }
        };
        Transition.prototype.doStop = function () {
            var pending = this.pending;
            this.setForceStopped(false);
            this.setCallStop(false);
            // still in transition
            if (pending) {
                this.setPending(false);
                cancelAnimationFrame(this.timer);
                var _a = this.translater.getComputedPosition(), x = _a.x, y = _a.y;
                this.transitionTime();
                this.translate({ x: x, y: y });
                this.setForceStopped(true);
                this.setCallStop(true);
                this.hooks.trigger(this.hooks.eventTypes.forceStop, { x: x, y: y });
            }
            return pending;
        };
        Transition.prototype.stop = function () {
            var stopFromTransition = this.doStop();
            if (stopFromTransition) {
                this.hooks.trigger(this.hooks.eventTypes.callStop);
            }
        };
        return Transition;
    }(Base));

    var Animation = /** @class */ (function (_super) {
        __extends(Animation, _super);
        function Animation() {
            return _super !== null && _super.apply(this, arguments) || this;
        }
        Animation.prototype.move = function (startPoint, endPoint, time, easingFn) {
            // time is 0
            if (!time) {
                this.translate(endPoint);
                if (this.options.probeType === 3 /* Realtime */) {
                    this.hooks.trigger(this.hooks.eventTypes.move, endPoint);
                }
                this.hooks.trigger(this.hooks.eventTypes.end, endPoint);
                return;
            }
            this.animate(startPoint, endPoint, time, easingFn);
        };
        Animation.prototype.animate = function (startPoint, endPoint, duration, easingFn) {
            var _this = this;
            var startTime = getNow();
            var destTime = startTime + duration;
            var isRealtimeProbeType = this.options.probeType === 3 /* Realtime */;
            var step = function () {
                var now = getNow();
                // js animation end
                if (now >= destTime) {
                    _this.translate(endPoint);
                    if (isRealtimeProbeType) {
                        _this.hooks.trigger(_this.hooks.eventTypes.move, endPoint);
                    }
                    _this.hooks.trigger(_this.hooks.eventTypes.end, endPoint);
                    return;
                }
                now = (now - startTime) / duration;
                var easing = easingFn(now);
                var newPoint = {};
                Object.keys(endPoint).forEach(function (key) {
                    var startValue = startPoint[key];
                    var endValue = endPoint[key];
                    newPoint[key] = (endValue - startValue) * easing + startValue;
                });
                _this.translate(newPoint);
                if (isRealtimeProbeType) {
                    _this.hooks.trigger(_this.hooks.eventTypes.move, newPoint);
                }
                if (_this.pending) {
                    _this.timer = requestAnimationFrame(step);
                }
                // call bs.stop() should not dispatch end hook again.
                // forceStop hook will do this.
                /* istanbul ignore if  */
                if (!_this.pending) {
                    if (_this.callStopWhenPending) {
                        _this.callStopWhenPending = false;
                    }
                    else {
                        // raf ends should dispatch end hook.
                        _this.hooks.trigger(_this.hooks.eventTypes.end, endPoint);
                    }
                }
            };
            this.setPending(true);
            // when manually call bs.stop(), then bs.scrollTo()
            // we should reset callStopWhenPending to dispatch end hook
            if (this.callStopWhenPending) {
                this.setCallStop(false);
            }
            cancelAnimationFrame(this.timer);
            step();
        };
        Animation.prototype.doStop = function () {
            var pending = this.pending;
            this.setForceStopped(false);
            this.setCallStop(false);
            // still in requestFrameAnimation
            if (pending) {
                this.setPending(false);
                cancelAnimationFrame(this.timer);
                var pos = this.translater.getComputedPosition();
                this.setForceStopped(true);
                this.setCallStop(true);
                this.hooks.trigger(this.hooks.eventTypes.forceStop, pos);
            }
            return pending;
        };
        Animation.prototype.stop = function () {
            var stopFromAnimation = this.doStop();
            if (stopFromAnimation) {
                this.hooks.trigger(this.hooks.eventTypes.callStop);
            }
        };
        return Animation;
    }(Base));

    function createAnimater(element, translater, options) {
        var useTransition = options.useTransition;
        var animaterOptions = {};
        Object.defineProperty(animaterOptions, 'probeType', {
            enumerable: true,
            configurable: false,
            get: function () {
                return options.probeType;
            },
        });
        if (useTransition) {
            return new Transition(element, translater, animaterOptions);
        }
        else {
            return new Animation(element, translater, animaterOptions);
        }
    }

    var Behavior = /** @class */ (function () {
        function Behavior(wrapper, content, options) {
            this.wrapper = wrapper;
            this.options = options;
            this.hooks = new EventEmitter([
                'beforeComputeBoundary',
                'computeBoundary',
                'momentum',
                'end',
                'ignoreHasScroll'
            ]);
            this.refresh(content);
        }
        Behavior.prototype.start = function () {
            this.dist = 0;
            this.setMovingDirection(0 /* Default */);
            this.setDirection(0 /* Default */);
        };
        Behavior.prototype.move = function (delta) {
            delta = this.hasScroll ? delta : 0;
            this.setMovingDirection(delta);
            return this.performDampingAlgorithm(delta, this.options.outOfBoundaryDampingFactor);
        };
        Behavior.prototype.setMovingDirection = function (delta) {
            this.movingDirection =
                delta > 0
                    ? -1 /* Negative */
                    : delta < 0
                        ? 1 /* Positive */
                        : 0 /* Default */;
        };
        Behavior.prototype.setDirection = function (delta) {
            this.direction =
                delta > 0
                    ? -1 /* Negative */
                    : delta < 0
                        ? 1 /* Positive */
                        : 0 /* Default */;
        };
        Behavior.prototype.performDampingAlgorithm = function (delta, dampingFactor) {
            var newPos = this.currentPos + delta;
            // Slow down or stop if outside of the boundaries
            if (newPos > this.minScrollPos || newPos < this.maxScrollPos) {
                if ((newPos > this.minScrollPos && this.options.bounces[0]) ||
                    (newPos < this.maxScrollPos && this.options.bounces[1])) {
                    newPos = this.currentPos + delta * dampingFactor;
                }
                else {
                    newPos =
                        newPos > this.minScrollPos ? this.minScrollPos : this.maxScrollPos;
                }
            }
            return newPos;
        };
        Behavior.prototype.end = function (duration) {
            var momentumInfo = {
                duration: 0
            };
            var absDist = Math.abs(this.currentPos - this.startPos);
            // start momentum animation if needed
            if (this.options.momentum &&
                duration < this.options.momentumLimitTime &&
                absDist > this.options.momentumLimitDistance) {
                var wrapperSize = (this.direction === -1 /* Negative */ && this.options.bounces[0]) ||
                    (this.direction === 1 /* Positive */ && this.options.bounces[1])
                    ? this.wrapperSize
                    : 0;
                momentumInfo = this.hasScroll
                    ? this.momentum(this.currentPos, this.startPos, duration, this.maxScrollPos, this.minScrollPos, wrapperSize, this.options)
                    : { destination: this.currentPos, duration: 0 };
            }
            else {
                this.hooks.trigger(this.hooks.eventTypes.end, momentumInfo);
            }
            return momentumInfo;
        };
        Behavior.prototype.momentum = function (current, start, time, lowerMargin, upperMargin, wrapperSize, options) {
            if (options === void 0) { options = this.options; }
            var distance = current - start;
            var speed = Math.abs(distance) / time;
            var deceleration = options.deceleration, swipeBounceTime = options.swipeBounceTime, swipeTime = options.swipeTime;
            var duration = Math.min(swipeTime, (speed * 2) / deceleration);
            var momentumData = {
                destination: current + ((speed * speed) / deceleration) * (distance < 0 ? -1 : 1),
                duration: duration,
                rate: 15
            };
            this.hooks.trigger(this.hooks.eventTypes.momentum, momentumData, distance);
            if (momentumData.destination < lowerMargin) {
                momentumData.destination = wrapperSize
                    ? Math.max(lowerMargin - wrapperSize / 4, lowerMargin - (wrapperSize / momentumData.rate) * speed)
                    : lowerMargin;
                momentumData.duration = swipeBounceTime;
            }
            else if (momentumData.destination > upperMargin) {
                momentumData.destination = wrapperSize
                    ? Math.min(upperMargin + wrapperSize / 4, upperMargin + (wrapperSize / momentumData.rate) * speed)
                    : upperMargin;
                momentumData.duration = swipeBounceTime;
            }
            momentumData.destination = Math.round(momentumData.destination);
            return momentumData;
        };
        Behavior.prototype.updateDirection = function () {
            var absDist = this.currentPos - this.absStartPos;
            this.setDirection(absDist);
        };
        Behavior.prototype.refresh = function (content) {
            var _a = this.options.rect, size = _a.size, position = _a.position;
            var isWrapperStatic = window.getComputedStyle(this.wrapper, null).position === 'static';
            // Force reflow
            var wrapperRect = getRect(this.wrapper);
            // use client is more fair than offset
            this.wrapperSize = this.wrapper[size === 'width' ? 'clientWidth' : 'clientHeight'];
            this.setContent(content);
            var contentRect = getRect(this.content);
            this.contentSize = contentRect[size];
            this.relativeOffset = contentRect[position];
            /* istanbul ignore if  */
            if (isWrapperStatic) {
                this.relativeOffset -= wrapperRect[position];
            }
            this.computeBoundary();
            this.setDirection(0 /* Default */);
        };
        Behavior.prototype.setContent = function (content) {
            if (content !== this.content) {
                this.content = content;
                this.resetState();
            }
        };
        Behavior.prototype.resetState = function () {
            this.currentPos = 0;
            this.startPos = 0;
            this.dist = 0;
            this.setDirection(0 /* Default */);
            this.setMovingDirection(0 /* Default */);
            this.resetStartPos();
        };
        Behavior.prototype.computeBoundary = function () {
            this.hooks.trigger(this.hooks.eventTypes.beforeComputeBoundary);
            var boundary = {
                minScrollPos: 0,
                maxScrollPos: this.wrapperSize - this.contentSize
            };
            if (boundary.maxScrollPos < 0) {
                boundary.maxScrollPos -= this.relativeOffset;
                if (this.options.specifiedIndexAsContent === 0) {
                    boundary.minScrollPos = -this.relativeOffset;
                }
            }
            this.hooks.trigger(this.hooks.eventTypes.computeBoundary, boundary);
            this.minScrollPos = boundary.minScrollPos;
            this.maxScrollPos = boundary.maxScrollPos;
            this.hasScroll =
                this.options.scrollable && this.maxScrollPos < this.minScrollPos;
            if (!this.hasScroll && this.minScrollPos < this.maxScrollPos) {
                this.maxScrollPos = this.minScrollPos;
                this.contentSize = this.wrapperSize;
            }
        };
        Behavior.prototype.updatePosition = function (pos) {
            this.currentPos = pos;
        };
        Behavior.prototype.getCurrentPos = function () {
            return this.currentPos;
        };
        Behavior.prototype.checkInBoundary = function () {
            var position = this.adjustPosition(this.currentPos);
            var inBoundary = position === this.getCurrentPos();
            return {
                position: position,
                inBoundary: inBoundary
            };
        };
        // adjust position when out of boundary
        Behavior.prototype.adjustPosition = function (pos) {
            if (!this.hasScroll &&
                !this.hooks.trigger(this.hooks.eventTypes.ignoreHasScroll)) {
                pos = this.minScrollPos;
            }
            else if (pos > this.minScrollPos) {
                pos = this.minScrollPos;
            }
            else if (pos < this.maxScrollPos) {
                pos = this.maxScrollPos;
            }
            return pos;
        };
        Behavior.prototype.updateStartPos = function () {
            this.startPos = this.currentPos;
        };
        Behavior.prototype.updateAbsStartPos = function () {
            this.absStartPos = this.currentPos;
        };
        Behavior.prototype.resetStartPos = function () {
            this.updateStartPos();
            this.updateAbsStartPos();
        };
        Behavior.prototype.getAbsDist = function (delta) {
            this.dist += delta;
            return Math.abs(this.dist);
        };
        Behavior.prototype.destroy = function () {
            this.hooks.destroy();
        };
        return Behavior;
    }());

    var _a, _b, _c, _d;
    var PassthroughHandlers = (_a = {},
        _a["yes" /* Yes */] = function (e) {
            return true;
        },
        _a["no" /* No */] = function (e) {
            maybePrevent(e);
            return false;
        },
        _a);
    var DirectionMap = (_b = {},
        _b["horizontal" /* Horizontal */] = (_c = {},
            _c["yes" /* Yes */] = "horizontal" /* Horizontal */,
            _c["no" /* No */] = "vertical" /* Vertical */,
            _c),
        _b["vertical" /* Vertical */] = (_d = {},
            _d["yes" /* Yes */] = "vertical" /* Vertical */,
            _d["no" /* No */] = "horizontal" /* Horizontal */,
            _d),
        _b);
    var DirectionLockAction = /** @class */ (function () {
        function DirectionLockAction(directionLockThreshold, freeScroll, eventPassthrough) {
            this.directionLockThreshold = directionLockThreshold;
            this.freeScroll = freeScroll;
            this.eventPassthrough = eventPassthrough;
            this.reset();
        }
        DirectionLockAction.prototype.reset = function () {
            this.directionLocked = "" /* Default */;
        };
        DirectionLockAction.prototype.checkMovingDirection = function (absDistX, absDistY, e) {
            this.computeDirectionLock(absDistX, absDistY);
            return this.handleEventPassthrough(e);
        };
        DirectionLockAction.prototype.adjustDelta = function (deltaX, deltaY) {
            if (this.directionLocked === "horizontal" /* Horizontal */) {
                deltaY = 0;
            }
            else if (this.directionLocked === "vertical" /* Vertical */) {
                deltaX = 0;
            }
            return {
                deltaX: deltaX,
                deltaY: deltaY,
            };
        };
        DirectionLockAction.prototype.computeDirectionLock = function (absDistX, absDistY) {
            // If you are scrolling in one direction, lock it
            if (this.directionLocked === "" /* Default */ && !this.freeScroll) {
                if (absDistX > absDistY + this.directionLockThreshold) {
                    this.directionLocked = "horizontal" /* Horizontal */; // lock horizontally
                }
                else if (absDistY >= absDistX + this.directionLockThreshold) {
                    this.directionLocked = "vertical" /* Vertical */; // lock vertically
                }
                else {
                    this.directionLocked = "none" /* None */; // no lock
                }
            }
        };
        DirectionLockAction.prototype.handleEventPassthrough = function (e) {
            var handleMap = DirectionMap[this.directionLocked];
            if (handleMap) {
                if (this.eventPassthrough === handleMap["yes" /* Yes */]) {
                    return PassthroughHandlers["yes" /* Yes */](e);
                }
                else if (this.eventPassthrough === handleMap["no" /* No */]) {
                    return PassthroughHandlers["no" /* No */](e);
                }
            }
            return false;
        };
        return DirectionLockAction;
    }());

    var applyQuadrantTransformation = function (deltaX, deltaY, quadrant) {
        if (quadrant === 2 /* Second */) {
            return [deltaY, -deltaX];
        }
        else if (quadrant === 3 /* Third */) {
            return [-deltaX, -deltaY];
        }
        else if (quadrant === 4 /* Forth */) {
            return [-deltaY, deltaX];
        }
        else {
            return [deltaX, deltaY];
        }
    };
    var ScrollerActions = /** @class */ (function () {
        function ScrollerActions(scrollBehaviorX, scrollBehaviorY, actionsHandler, animater, options) {
            this.hooks = new EventEmitter([
                'start',
                'beforeMove',
                'scrollStart',
                'scroll',
                'beforeEnd',
                'end',
                'scrollEnd',
                'contentNotMoved',
                'detectMovingDirection',
                'coordinateTransformation',
            ]);
            this.scrollBehaviorX = scrollBehaviorX;
            this.scrollBehaviorY = scrollBehaviorY;
            this.actionsHandler = actionsHandler;
            this.animater = animater;
            this.options = options;
            this.directionLockAction = new DirectionLockAction(options.directionLockThreshold, options.freeScroll, options.eventPassthrough);
            this.enabled = true;
            this.bindActionsHandler();
        }
        ScrollerActions.prototype.bindActionsHandler = function () {
            var _this = this;
            // [mouse|touch]start event
            this.actionsHandler.hooks.on(this.actionsHandler.hooks.eventTypes.start, function (e) {
                if (!_this.enabled)
                    return true;
                return _this.handleStart(e);
            });
            // [mouse|touch]move event
            this.actionsHandler.hooks.on(this.actionsHandler.hooks.eventTypes.move, function (_a) {
                var deltaX = _a.deltaX, deltaY = _a.deltaY, e = _a.e;
                if (!_this.enabled)
                    return true;
                var _b = applyQuadrantTransformation(deltaX, deltaY, _this.options.quadrant), transformateDeltaX = _b[0], transformateDeltaY = _b[1];
                var transformateDeltaData = {
                    deltaX: transformateDeltaX,
                    deltaY: transformateDeltaY,
                };
                _this.hooks.trigger(_this.hooks.eventTypes.coordinateTransformation, transformateDeltaData);
                return _this.handleMove(transformateDeltaData.deltaX, transformateDeltaData.deltaY, e);
            });
            // [mouse|touch]end event
            this.actionsHandler.hooks.on(this.actionsHandler.hooks.eventTypes.end, function (e) {
                if (!_this.enabled)
                    return true;
                return _this.handleEnd(e);
            });
            // click
            this.actionsHandler.hooks.on(this.actionsHandler.hooks.eventTypes.click, function (e) {
                // handle native click event
                if (_this.enabled && !e._constructed) {
                    _this.handleClick(e);
                }
            });
        };
        ScrollerActions.prototype.handleStart = function (e) {
            var timestamp = getNow();
            this.fingerMoved = false;
            this.contentMoved = false;
            this.startTime = timestamp;
            this.directionLockAction.reset();
            this.scrollBehaviorX.start();
            this.scrollBehaviorY.start();
            // force stopping last transition or animation
            this.animater.doStop();
            this.scrollBehaviorX.resetStartPos();
            this.scrollBehaviorY.resetStartPos();
            this.hooks.trigger(this.hooks.eventTypes.start, e);
        };
        ScrollerActions.prototype.handleMove = function (deltaX, deltaY, e) {
            if (this.hooks.trigger(this.hooks.eventTypes.beforeMove, e)) {
                return;
            }
            var absDistX = this.scrollBehaviorX.getAbsDist(deltaX);
            var absDistY = this.scrollBehaviorY.getAbsDist(deltaY);
            var timestamp = getNow();
            // We need to move at least momentumLimitDistance pixels
            // for the scrolling to initiate
            if (this.checkMomentum(absDistX, absDistY, timestamp)) {
                return true;
            }
            if (this.directionLockAction.checkMovingDirection(absDistX, absDistY, e)) {
                this.actionsHandler.setInitiated();
                return true;
            }
            var delta = this.directionLockAction.adjustDelta(deltaX, deltaY);
            var prevX = this.scrollBehaviorX.getCurrentPos();
            var newX = this.scrollBehaviorX.move(delta.deltaX);
            var prevY = this.scrollBehaviorY.getCurrentPos();
            var newY = this.scrollBehaviorY.move(delta.deltaY);
            if (this.hooks.trigger(this.hooks.eventTypes.detectMovingDirection)) {
                return;
            }
            if (!this.fingerMoved) {
                this.fingerMoved = true;
            }
            var positionChanged = newX !== prevX || newY !== prevY;
            if (!this.contentMoved && !positionChanged) {
                this.hooks.trigger(this.hooks.eventTypes.contentNotMoved);
            }
            if (!this.contentMoved && positionChanged) {
                this.contentMoved = true;
                this.hooks.trigger(this.hooks.eventTypes.scrollStart);
            }
            if (this.contentMoved && positionChanged) {
                this.animater.translate({
                    x: newX,
                    y: newY,
                });
                this.dispatchScroll(timestamp);
            }
        };
        ScrollerActions.prototype.dispatchScroll = function (timestamp) {
            // dispatch scroll in interval time
            if (timestamp - this.startTime > this.options.momentumLimitTime) {
                // refresh time and starting position to initiate a momentum
                this.startTime = timestamp;
                this.scrollBehaviorX.updateStartPos();
                this.scrollBehaviorY.updateStartPos();
                if (this.options.probeType === 1 /* Throttle */) {
                    this.hooks.trigger(this.hooks.eventTypes.scroll, this.getCurrentPos());
                }
            }
            // dispatch scroll all the time
            if (this.options.probeType > 1 /* Throttle */) {
                this.hooks.trigger(this.hooks.eventTypes.scroll, this.getCurrentPos());
            }
        };
        ScrollerActions.prototype.checkMomentum = function (absDistX, absDistY, timestamp) {
            return (timestamp - this.endTime > this.options.momentumLimitTime &&
                absDistY < this.options.momentumLimitDistance &&
                absDistX < this.options.momentumLimitDistance);
        };
        ScrollerActions.prototype.handleEnd = function (e) {
            if (this.hooks.trigger(this.hooks.eventTypes.beforeEnd, e)) {
                return;
            }
            var currentPos = this.getCurrentPos();
            this.scrollBehaviorX.updateDirection();
            this.scrollBehaviorY.updateDirection();
            if (this.hooks.trigger(this.hooks.eventTypes.end, e, currentPos)) {
                return true;
            }
            currentPos = this.ensureIntegerPos(currentPos);
            this.animater.translate(currentPos);
            this.endTime = getNow();
            var duration = this.endTime - this.startTime;
            this.hooks.trigger(this.hooks.eventTypes.scrollEnd, currentPos, duration);
        };
        ScrollerActions.prototype.ensureIntegerPos = function (currentPos) {
            this.ensuringInteger = true;
            var x = currentPos.x, y = currentPos.y;
            var _a = this.scrollBehaviorX, minScrollPosX = _a.minScrollPos, maxScrollPosX = _a.maxScrollPos;
            var _b = this.scrollBehaviorY, minScrollPosY = _b.minScrollPos, maxScrollPosY = _b.maxScrollPos;
            x = x > 0 ? Math.ceil(x) : Math.floor(x);
            y = y > 0 ? Math.ceil(y) : Math.floor(y);
            x = between(x, maxScrollPosX, minScrollPosX);
            y = between(y, maxScrollPosY, minScrollPosY);
            return { x: x, y: y };
        };
        ScrollerActions.prototype.handleClick = function (e) {
            if (!preventDefaultExceptionFn(e.target, this.options.preventDefaultException)) {
                maybePrevent(e);
                e.stopPropagation();
            }
        };
        ScrollerActions.prototype.getCurrentPos = function () {
            return {
                x: this.scrollBehaviorX.getCurrentPos(),
                y: this.scrollBehaviorY.getCurrentPos(),
            };
        };
        ScrollerActions.prototype.refresh = function () {
            this.endTime = 0;
        };
        ScrollerActions.prototype.destroy = function () {
            this.hooks.destroy();
        };
        return ScrollerActions;
    }());

    function createActionsHandlerOptions(bsOptions) {
        var options = [
            'click',
            'bindToWrapper',
            'disableMouse',
            'disableTouch',
            'preventDefault',
            'stopPropagation',
            'tagException',
            'preventDefaultException',
            'autoEndDistance',
        ].reduce(function (prev, cur) {
            prev[cur] = bsOptions[cur];
            return prev;
        }, {});
        return options;
    }
    function createBehaviorOptions(bsOptions, extraProp, bounces, rect) {
        var options = [
            'momentum',
            'momentumLimitTime',
            'momentumLimitDistance',
            'deceleration',
            'swipeBounceTime',
            'swipeTime',
            'outOfBoundaryDampingFactor',
            'specifiedIndexAsContent',
        ].reduce(function (prev, cur) {
            prev[cur] = bsOptions[cur];
            return prev;
        }, {});
        // add extra property
        options.scrollable = !!bsOptions[extraProp];
        options.bounces = bounces;
        options.rect = rect;
        return options;
    }

    function bubbling(source, target, events) {
        events.forEach(function (event) {
            var sourceEvent;
            var targetEvent;
            if (typeof event === 'string') {
                sourceEvent = targetEvent = event;
            }
            else {
                sourceEvent = event.source;
                targetEvent = event.target;
            }
            source.on(sourceEvent, function () {
                var args = [];
                for (var _i = 0; _i < arguments.length; _i++) {
                    args[_i] = arguments[_i];
                }
                return target.trigger.apply(target, __spreadArrays([targetEvent], args));
            });
        });
    }

    function isSamePoint(startPoint, endPoint) {
        // keys of startPoint and endPoint should be equal
        var keys = Object.keys(startPoint);
        for (var _i = 0, keys_1 = keys; _i < keys_1.length; _i++) {
            var key = keys_1[_i];
            if (startPoint[key] !== endPoint[key])
                return false;
        }
        return true;
    }

    var MIN_SCROLL_DISTANCE = 1;
    var Scroller = /** @class */ (function () {
        function Scroller(wrapper, content, options) {
            this.wrapper = wrapper;
            this.content = content;
            this.resizeTimeout = 0;
            this.hooks = new EventEmitter([
                'beforeStart',
                'beforeMove',
                'beforeScrollStart',
                'scrollStart',
                'scroll',
                'beforeEnd',
                'scrollEnd',
                'resize',
                'touchEnd',
                'end',
                'flick',
                'scrollCancel',
                'momentum',
                'scrollTo',
                'minDistanceScroll',
                'scrollToElement',
                'beforeRefresh',
            ]);
            this.options = options;
            var _a = this.options.bounce, left = _a.left, right = _a.right, top = _a.top, bottom = _a.bottom;
            // direction X
            this.scrollBehaviorX = new Behavior(wrapper, content, createBehaviorOptions(options, 'scrollX', [left, right], {
                size: 'width',
                position: 'left',
            }));
            // direction Y
            this.scrollBehaviorY = new Behavior(wrapper, content, createBehaviorOptions(options, 'scrollY', [top, bottom], {
                size: 'height',
                position: 'top',
            }));
            this.translater = new Translater(this.content);
            this.animater = createAnimater(this.content, this.translater, this.options);
            this.actionsHandler = new ActionsHandler(this.options.bindToTarget ? this.content : wrapper, createActionsHandlerOptions(this.options));
            this.actions = new ScrollerActions(this.scrollBehaviorX, this.scrollBehaviorY, this.actionsHandler, this.animater, this.options);
            var resizeHandler = this.resize.bind(this);
            this.resizeRegister = new EventRegister(window, [
                {
                    name: 'orientationchange',
                    handler: resizeHandler,
                },
                {
                    name: 'resize',
                    handler: resizeHandler,
                },
            ]);
            this.registerTransitionEnd();
            this.init();
        }
        Scroller.prototype.init = function () {
            var _this = this;
            this.bindTranslater();
            this.bindAnimater();
            this.bindActions();
            // enable pointer events when scrolling ends
            this.hooks.on(this.hooks.eventTypes.scrollEnd, function () {
                _this.togglePointerEvents(true);
            });
        };
        Scroller.prototype.registerTransitionEnd = function () {
            this.transitionEndRegister = new EventRegister(this.content, [
                {
                    name: style.transitionEnd,
                    handler: this.transitionEnd.bind(this),
                },
            ]);
        };
        Scroller.prototype.bindTranslater = function () {
            var _this = this;
            var hooks = this.translater.hooks;
            hooks.on(hooks.eventTypes.beforeTranslate, function (transformStyle) {
                if (_this.options.translateZ) {
                    transformStyle.push(_this.options.translateZ);
                }
            });
            // disable pointer events when scrolling
            hooks.on(hooks.eventTypes.translate, function (pos) {
                var prevPos = _this.getCurrentPos();
                _this.updatePositions(pos);
                // scrollEnd will dispatch when scroll is force stopping in touchstart handler
                // so in touchend handler, don't toggle pointer-events
                if (_this.actions.ensuringInteger === true) {
                    _this.actions.ensuringInteger = false;
                    return;
                }
                // a valid translate
                if (pos.x !== prevPos.x || pos.y !== prevPos.y) {
                    _this.togglePointerEvents(false);
                }
            });
        };
        Scroller.prototype.bindAnimater = function () {
            var _this = this;
            // reset position
            this.animater.hooks.on(this.animater.hooks.eventTypes.end, function (pos) {
                if (!_this.resetPosition(_this.options.bounceTime)) {
                    _this.animater.setPending(false);
                    _this.hooks.trigger(_this.hooks.eventTypes.scrollEnd, pos);
                }
            });
            bubbling(this.animater.hooks, this.hooks, [
                {
                    source: this.animater.hooks.eventTypes.move,
                    target: this.hooks.eventTypes.scroll,
                },
                {
                    source: this.animater.hooks.eventTypes.forceStop,
                    target: this.hooks.eventTypes.scrollEnd,
                },
            ]);
        };
        Scroller.prototype.bindActions = function () {
            var _this = this;
            var actions = this.actions;
            bubbling(actions.hooks, this.hooks, [
                {
                    source: actions.hooks.eventTypes.start,
                    target: this.hooks.eventTypes.beforeStart,
                },
                {
                    source: actions.hooks.eventTypes.start,
                    target: this.hooks.eventTypes.beforeScrollStart,
                },
                {
                    source: actions.hooks.eventTypes.beforeMove,
                    target: this.hooks.eventTypes.beforeMove,
                },
                {
                    source: actions.hooks.eventTypes.scrollStart,
                    target: this.hooks.eventTypes.scrollStart,
                },
                {
                    source: actions.hooks.eventTypes.scroll,
                    target: this.hooks.eventTypes.scroll,
                },
                {
                    source: actions.hooks.eventTypes.beforeEnd,
                    target: this.hooks.eventTypes.beforeEnd,
                },
            ]);
            actions.hooks.on(actions.hooks.eventTypes.end, function (e, pos) {
                _this.hooks.trigger(_this.hooks.eventTypes.touchEnd, pos);
                if (_this.hooks.trigger(_this.hooks.eventTypes.end, pos)) {
                    return true;
                }
                // check if it is a click operation
                if (!actions.fingerMoved) {
                    _this.hooks.trigger(_this.hooks.eventTypes.scrollCancel);
                    if (_this.checkClick(e)) {
                        return true;
                    }
                }
                // reset if we are outside of the boundaries
                if (_this.resetPosition(_this.options.bounceTime, ease.bounce)) {
                    _this.animater.setForceStopped(false);
                    return true;
                }
            });
            actions.hooks.on(actions.hooks.eventTypes.scrollEnd, function (pos, duration) {
                var deltaX = Math.abs(pos.x - _this.scrollBehaviorX.startPos);
                var deltaY = Math.abs(pos.y - _this.scrollBehaviorY.startPos);
                if (_this.checkFlick(duration, deltaX, deltaY)) {
                    _this.animater.setForceStopped(false);
                    _this.hooks.trigger(_this.hooks.eventTypes.flick);
                    return;
                }
                if (_this.momentum(pos, duration)) {
                    _this.animater.setForceStopped(false);
                    return;
                }
                if (actions.contentMoved) {
                    _this.hooks.trigger(_this.hooks.eventTypes.scrollEnd, pos);
                }
                if (_this.animater.forceStopped) {
                    _this.animater.setForceStopped(false);
                }
            });
        };
        Scroller.prototype.checkFlick = function (duration, deltaX, deltaY) {
            var flickMinMovingDistance = 1; // distinguish flick from click
            if (this.hooks.events.flick.length > 1 &&
                duration < this.options.flickLimitTime &&
                deltaX < this.options.flickLimitDistance &&
                deltaY < this.options.flickLimitDistance &&
                (deltaY > flickMinMovingDistance || deltaX > flickMinMovingDistance)) {
                return true;
            }
        };
        Scroller.prototype.momentum = function (pos, duration) {
            var meta = {
                time: 0,
                easing: ease.swiper,
                newX: pos.x,
                newY: pos.y,
            };
            // start momentum animation if needed
            var momentumX = this.scrollBehaviorX.end(duration);
            var momentumY = this.scrollBehaviorY.end(duration);
            meta.newX = isUndef(momentumX.destination)
                ? meta.newX
                : momentumX.destination;
            meta.newY = isUndef(momentumY.destination)
                ? meta.newY
                : momentumY.destination;
            meta.time = Math.max(momentumX.duration, momentumY.duration);
            this.hooks.trigger(this.hooks.eventTypes.momentum, meta, this);
            // when x or y changed, do momentum animation now!
            if (meta.newX !== pos.x || meta.newY !== pos.y) {
                // change easing function when scroller goes out of the boundaries
                if (meta.newX > this.scrollBehaviorX.minScrollPos ||
                    meta.newX < this.scrollBehaviorX.maxScrollPos ||
                    meta.newY > this.scrollBehaviorY.minScrollPos ||
                    meta.newY < this.scrollBehaviorY.maxScrollPos) {
                    meta.easing = ease.swipeBounce;
                }
                this.scrollTo(meta.newX, meta.newY, meta.time, meta.easing);
                return true;
            }
        };
        Scroller.prototype.checkClick = function (e) {
            var cancelable = {
                preventClick: this.animater.forceStopped,
            };
            // we scrolled less than momentumLimitDistance pixels
            if (this.hooks.trigger(this.hooks.eventTypes.checkClick)) {
                this.animater.setForceStopped(false);
                return true;
            }
            if (!cancelable.preventClick) {
                var _dblclick = this.options.dblclick;
                var dblclickTrigged = false;
                if (_dblclick && this.lastClickTime) {
                    var _a = _dblclick.delay, delay = _a === void 0 ? 300 : _a;
                    if (getNow() - this.lastClickTime < delay) {
                        dblclickTrigged = true;
                        dblclick(e);
                    }
                }
                if (this.options.tap) {
                    tap(e, this.options.tap);
                }
                if (this.options.click &&
                    !preventDefaultExceptionFn(e.target, this.options.preventDefaultException)) {
                    click(e);
                }
                this.lastClickTime = dblclickTrigged ? null : getNow();
                return true;
            }
            return false;
        };
        Scroller.prototype.resize = function () {
            var _this = this;
            if (!this.actions.enabled) {
                return;
            }
            // fix a scroll problem under Android condition
            /* istanbul ignore if  */
            if (isAndroid) {
                this.wrapper.scrollTop = 0;
            }
            clearTimeout(this.resizeTimeout);
            this.resizeTimeout = window.setTimeout(function () {
                _this.hooks.trigger(_this.hooks.eventTypes.resize);
            }, this.options.resizePolling);
        };
        /* istanbul ignore next */
        Scroller.prototype.transitionEnd = function (e) {
            if (e.target !== this.content || !this.animater.pending) {
                return;
            }
            var animater = this.animater;
            animater.transitionTime();
            if (!this.resetPosition(this.options.bounceTime, ease.bounce)) {
                this.animater.setPending(false);
                if (this.options.probeType !== 3 /* Realtime */) {
                    this.hooks.trigger(this.hooks.eventTypes.scrollEnd, this.getCurrentPos());
                }
            }
        };
        Scroller.prototype.togglePointerEvents = function (enabled) {
            if (enabled === void 0) { enabled = true; }
            var el = this.content.children.length
                ? this.content.children
                : [this.content];
            var pointerEvents = enabled ? 'auto' : 'none';
            for (var i = 0; i < el.length; i++) {
                var node = el[i];
                // ignore BetterScroll instance's wrapper DOM
                /* istanbul ignore if  */
                if (node.isBScrollContainer) {
                    continue;
                }
                node.style.pointerEvents = pointerEvents;
            }
        };
        Scroller.prototype.refresh = function (content) {
            var contentChanged = this.setContent(content);
            this.hooks.trigger(this.hooks.eventTypes.beforeRefresh);
            this.scrollBehaviorX.refresh(content);
            this.scrollBehaviorY.refresh(content);
            if (contentChanged) {
                this.translater.setContent(content);
                this.animater.setContent(content);
                this.transitionEndRegister.destroy();
                this.registerTransitionEnd();
                if (this.options.bindToTarget) {
                    this.actionsHandler.setContent(content);
                }
            }
            this.actions.refresh();
            this.wrapperOffset = offset(this.wrapper);
        };
        Scroller.prototype.setContent = function (content) {
            var contentChanged = content !== this.content;
            if (contentChanged) {
                this.content = content;
            }
            return contentChanged;
        };
        Scroller.prototype.scrollBy = function (deltaX, deltaY, time, easing) {
            if (time === void 0) { time = 0; }
            var _a = this.getCurrentPos(), x = _a.x, y = _a.y;
            easing = !easing ? ease.bounce : easing;
            deltaX += x;
            deltaY += y;
            this.scrollTo(deltaX, deltaY, time, easing);
        };
        Scroller.prototype.scrollTo = function (x, y, time, easing, extraTransform) {
            if (time === void 0) { time = 0; }
            if (easing === void 0) { easing = ease.bounce; }
            if (extraTransform === void 0) { extraTransform = {
                start: {},
                end: {},
            }; }
            var easingFn = this.options.useTransition ? easing.style : easing.fn;
            var currentPos = this.getCurrentPos();
            var startPoint = __assign({ x: currentPos.x, y: currentPos.y }, extraTransform.start);
            var endPoint = __assign({ x: x,
                y: y }, extraTransform.end);
            this.hooks.trigger(this.hooks.eventTypes.scrollTo, endPoint);
            // it is an useless move
            if (isSamePoint(startPoint, endPoint))
                return;
            var deltaX = Math.abs(endPoint.x - startPoint.x);
            var deltaY = Math.abs(endPoint.y - startPoint.y);
            // considering of browser compatibility for decimal transform value
            // force translating immediately
            if (deltaX < MIN_SCROLL_DISTANCE && deltaY < MIN_SCROLL_DISTANCE) {
                time = 0;
                this.hooks.trigger(this.hooks.eventTypes.minDistanceScroll);
            }
            this.animater.move(startPoint, endPoint, time, easingFn);
        };
        Scroller.prototype.scrollToElement = function (el, time, offsetX, offsetY, easing) {
            var targetEle = getElement(el);
            var pos = offset(targetEle);
            var getOffset = function (offset, size, wrapperSize) {
                if (typeof offset === 'number') {
                    return offset;
                }
                // if offsetX/Y are true we center the element to the screen
                return offset ? Math.round(size / 2 - wrapperSize / 2) : 0;
            };
            offsetX = getOffset(offsetX, targetEle.offsetWidth, this.wrapper.offsetWidth);
            offsetY = getOffset(offsetY, targetEle.offsetHeight, this.wrapper.offsetHeight);
            var getPos = function (pos, wrapperPos, offset, scrollBehavior) {
                pos -= wrapperPos;
                pos = scrollBehavior.adjustPosition(pos - offset);
                return pos;
            };
            pos.left = getPos(pos.left, this.wrapperOffset.left, offsetX, this.scrollBehaviorX);
            pos.top = getPos(pos.top, this.wrapperOffset.top, offsetY, this.scrollBehaviorY);
            if (this.hooks.trigger(this.hooks.eventTypes.scrollToElement, targetEle, pos)) {
                return;
            }
            this.scrollTo(pos.left, pos.top, time, easing);
        };
        Scroller.prototype.resetPosition = function (time, easing) {
            if (time === void 0) { time = 0; }
            if (easing === void 0) { easing = ease.bounce; }
            var _a = this.scrollBehaviorX.checkInBoundary(), x = _a.position, xInBoundary = _a.inBoundary;
            var _b = this.scrollBehaviorY.checkInBoundary(), y = _b.position, yInBoundary = _b.inBoundary;
            if (xInBoundary && yInBoundary) {
                return false;
            }
            /* istanbul ignore if  */
            if (isIOSBadVersion) {
                // fix ios 13.4 bouncing
                // see it in issues 982
                this.reflow();
            }
            // out of boundary
            this.scrollTo(x, y, time, easing);
            return true;
        };
        /* istanbul ignore next */
        Scroller.prototype.reflow = function () {
            this._reflow = this.content.offsetHeight;
        };
        Scroller.prototype.updatePositions = function (pos) {
            this.scrollBehaviorX.updatePosition(pos.x);
            this.scrollBehaviorY.updatePosition(pos.y);
        };
        Scroller.prototype.getCurrentPos = function () {
            return this.actions.getCurrentPos();
        };
        Scroller.prototype.enable = function () {
            this.actions.enabled = true;
        };
        Scroller.prototype.disable = function () {
            cancelAnimationFrame(this.animater.timer);
            this.actions.enabled = false;
        };
        Scroller.prototype.destroy = function () {
            var _this = this;
            var keys = [
                'resizeRegister',
                'transitionEndRegister',
                'actionsHandler',
                'actions',
                'hooks',
                'animater',
                'translater',
                'scrollBehaviorX',
                'scrollBehaviorY',
            ];
            keys.forEach(function (key) { return _this[key].destroy(); });
        };
        return Scroller;
    }());

    var BScrollConstructor = /** @class */ (function (_super) {
        __extends(BScrollConstructor, _super);
        function BScrollConstructor(el, options) {
            var _this = _super.call(this, [
                'refresh',
                'contentChanged',
                'enable',
                'disable',
                'beforeScrollStart',
                'scrollStart',
                'scroll',
                'scrollEnd',
                'scrollCancel',
                'touchEnd',
                'flick',
                'destroy'
            ]) || this;
            var wrapper = getElement(el);
            if (!wrapper) {
                warn('Can not resolve the wrapper DOM.');
                return _this;
            }
            _this.plugins = {};
            _this.options = new OptionsConstructor().merge(options).process();
            if (!_this.setContent(wrapper).valid) {
                return _this;
            }
            _this.hooks = new EventEmitter([
                'refresh',
                'enable',
                'disable',
                'destroy',
                'beforeInitialScrollTo',
                'contentChanged'
            ]);
            _this.init(wrapper);
            return _this;
        }
        BScrollConstructor.use = function (ctor) {
            var name = ctor.pluginName;
            var installed = BScrollConstructor.plugins.some(function (plugin) { return ctor === plugin.ctor; });
            if (installed)
                return BScrollConstructor;
            if (isUndef(name)) {
                warn("Plugin Class must specify plugin's name in static property by 'pluginName' field.");
                return BScrollConstructor;
            }
            BScrollConstructor.pluginsMap[name] = true;
            BScrollConstructor.plugins.push({
                name: name,
                applyOrder: ctor.applyOrder,
                ctor: ctor
            });
            return BScrollConstructor;
        };
        BScrollConstructor.prototype.setContent = function (wrapper) {
            var contentChanged = false;
            var valid = true;
            var content = wrapper.children[this.options.specifiedIndexAsContent];
            if (!content) {
                warn('The wrapper need at least one child element to be content element to scroll.');
                valid = false;
            }
            else {
                contentChanged = this.content !== content;
                if (contentChanged) {
                    this.content = content;
                }
            }
            return {
                valid: valid,
                contentChanged: contentChanged
            };
        };
        BScrollConstructor.prototype.init = function (wrapper) {
            var _this = this;
            this.wrapper = wrapper;
            // mark wrapper to recognize bs instance by DOM attribute
            wrapper.isBScrollContainer = true;
            this.scroller = new Scroller(wrapper, this.content, this.options);
            this.scroller.hooks.on(this.scroller.hooks.eventTypes.resize, function () {
                _this.refresh();
            });
            this.eventBubbling();
            this.handleAutoBlur();
            this.enable();
            this.proxy(propertiesConfig);
            this.applyPlugins();
            // maybe boundary has changed, should refresh
            this.refreshWithoutReset(this.content);
            var _a = this.options, startX = _a.startX, startY = _a.startY;
            var position = {
                x: startX,
                y: startY
            };
            // maybe plugins want to control scroll position
            if (this.hooks.trigger(this.hooks.eventTypes.beforeInitialScrollTo, position)) {
                return;
            }
            this.scroller.scrollTo(position.x, position.y);
        };
        BScrollConstructor.prototype.applyPlugins = function () {
            var _this = this;
            var options = this.options;
            BScrollConstructor.plugins
                .sort(function (a, b) {
                var _a;
                var applyOrderMap = (_a = {},
                    _a["pre" /* Pre */] = -1,
                    _a["post" /* Post */] = 1,
                    _a);
                var aOrder = a.applyOrder ? applyOrderMap[a.applyOrder] : 0;
                var bOrder = b.applyOrder ? applyOrderMap[b.applyOrder] : 0;
                return aOrder - bOrder;
            })
                .forEach(function (item) {
                var ctor = item.ctor;
                if (options[item.name] && typeof ctor === 'function') {
                    _this.plugins[item.name] = new ctor(_this);
                }
            });
        };
        BScrollConstructor.prototype.handleAutoBlur = function () {
            /* istanbul ignore if  */
            if (this.options.autoBlur) {
                this.on(this.eventTypes.beforeScrollStart, function () {
                    var activeElement = document.activeElement;
                    if (activeElement &&
                        (activeElement.tagName === 'INPUT' ||
                            activeElement.tagName === 'TEXTAREA')) {
                        activeElement.blur();
                    }
                });
            }
        };
        BScrollConstructor.prototype.eventBubbling = function () {
            bubbling(this.scroller.hooks, this, [
                this.eventTypes.beforeScrollStart,
                this.eventTypes.scrollStart,
                this.eventTypes.scroll,
                this.eventTypes.scrollEnd,
                this.eventTypes.scrollCancel,
                this.eventTypes.touchEnd,
                this.eventTypes.flick
            ]);
        };
        BScrollConstructor.prototype.refreshWithoutReset = function (content) {
            this.scroller.refresh(content);
            this.hooks.trigger(this.hooks.eventTypes.refresh, content);
            this.trigger(this.eventTypes.refresh, content);
        };
        BScrollConstructor.prototype.proxy = function (propertiesConfig) {
            var _this = this;
            propertiesConfig.forEach(function (_a) {
                var key = _a.key, sourceKey = _a.sourceKey;
                propertiesProxy(_this, sourceKey, key);
            });
        };
        BScrollConstructor.prototype.refresh = function () {
            var _a = this.setContent(this.wrapper), contentChanged = _a.contentChanged, valid = _a.valid;
            if (valid) {
                var content = this.content;
                this.refreshWithoutReset(content);
                if (contentChanged) {
                    this.hooks.trigger(this.hooks.eventTypes.contentChanged, content);
                    this.trigger(this.eventTypes.contentChanged, content);
                }
                this.scroller.resetPosition();
            }
        };
        BScrollConstructor.prototype.enable = function () {
            this.scroller.enable();
            this.hooks.trigger(this.hooks.eventTypes.enable);
            this.trigger(this.eventTypes.enable);
        };
        BScrollConstructor.prototype.disable = function () {
            this.scroller.disable();
            this.hooks.trigger(this.hooks.eventTypes.disable);
            this.trigger(this.eventTypes.disable);
        };
        BScrollConstructor.prototype.destroy = function () {
            this.hooks.trigger(this.hooks.eventTypes.destroy);
            this.trigger(this.eventTypes.destroy);
            this.scroller.destroy();
        };
        BScrollConstructor.prototype.eventRegister = function (names) {
            this.registerType(names);
        };
        BScrollConstructor.plugins = [];
        BScrollConstructor.pluginsMap = {};
        return BScrollConstructor;
    }(EventEmitter));
    function createBScroll(el, options) {
        var bs = new BScrollConstructor(el, options);
        return bs;
    }
    createBScroll.use = BScrollConstructor.use;
    createBScroll.plugins = BScrollConstructor.plugins;
    createBScroll.pluginsMap = BScrollConstructor.pluginsMap;
    var BScroll = createBScroll;

    exports.Behavior = Behavior;
    exports.CustomOptions = CustomOptions;
    exports.createBScroll = createBScroll;
    exports["default"] = BScroll;

    Object.defineProperty(exports, '__esModule', { value: true });

}));
if(typeof window !== "undefined" && window.BScroll) { 
  window.BScroll = window.BScroll.default;
}