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module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = \"./packages/mdc-slider/index.ts\");\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/**\n * AnimationFrame provides a user-friendly abstraction around requesting\n * and canceling animation frames.\n */\nexport class AnimationFrame {\n private readonly rafIDs = new Map<string, number>();\n\n /**\n * Requests an animation frame. Cancels any existing frame with the same key.\n * @param {string} key The key for this callback.\n * @param {FrameRequestCallback} callback The callback to be executed.\n */\n request(key: string, callback: FrameRequestCallback) {\n this.cancel(key);\n const frameID = requestAnimationFrame((frame) => {\n this.rafIDs.delete(key);\n // Callback must come *after* the key is deleted so that nested calls to\n // request with the same key are not deleted.\n callback(frame);\n });\n this.rafIDs.set(key, frameID);\n }\n\n /**\n * Cancels a queued callback with the given key.\n * @param {string} key The key for this callback.\n */\n cancel(key: string) {\n const rafID = this.rafIDs.get(key);\n if (rafID) {\n cancelAnimationFrame(rafID);\n this.rafIDs.delete(key);\n }\n }\n\n /**\n * Cancels all queued callback.\n */\n cancelAll() {\n // Need to use forEach because it's the only iteration method supported\n // by IE11. Suppress the underscore because we don't need it.\n // tslint:disable-next-line:enforce-name-casing\n this.rafIDs.forEach((_, key) => {\n this.cancel(key);\n });\n }\n\n /**\n * Returns the queue of unexecuted callback keys.\n */\n getQueue(): string[] {\n const queue: string[] = [];\n // Need to use forEach because it's the only iteration method supported\n // by IE11. Suppress the underscore because we don't need it.\n // tslint:disable-next-line:enforce-name-casing\n this.rafIDs.forEach((_, key) => {\n queue.push(key);\n });\n return queue;\n }\n}\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {\n CssVendorPropertyMap, JsVendorPropertyMap,\n PrefixedCssPropertyName, PrefixedJsEventType,\n StandardCssPropertyName, StandardJsEventType,\n} from './types';\n\nconst cssPropertyNameMap: CssVendorPropertyMap = {\n animation: {\n prefixed: '-webkit-animation',\n standard: 'animation',\n },\n transform: {\n prefixed: '-webkit-transform',\n standard: 'transform',\n },\n transition: {\n prefixed: '-webkit-transition',\n standard: 'transition',\n },\n};\n\nconst jsEventTypeMap: JsVendorPropertyMap = {\n animationend: {\n cssProperty: 'animation',\n prefixed: 'webkitAnimationEnd',\n standard: 'animationend',\n },\n animationiteration: {\n cssProperty: 'animation',\n prefixed: 'webkitAnimationIteration',\n standard: 'animationiteration',\n },\n animationstart: {\n cssProperty: 'animation',\n prefixed: 'webkitAnimationStart',\n standard: 'animationstart',\n },\n transitionend: {\n cssProperty: 'transition',\n prefixed: 'webkitTransitionEnd',\n standard: 'transitionend',\n },\n};\n\nfunction isWindow(windowObj: Window): boolean {\n return Boolean(windowObj.document) && typeof windowObj.document.createElement === 'function';\n}\n\nexport function getCorrectPropertyName(windowObj: Window, cssProperty: StandardCssPropertyName):\n StandardCssPropertyName | PrefixedCssPropertyName {\n if (isWindow(windowObj) && cssProperty in cssPropertyNameMap) {\n const el = windowObj.document.createElement('div');\n const {standard, prefixed} = cssPropertyNameMap[cssProperty];\n const isStandard = standard in el.style;\n return isStandard ? standard : prefixed;\n }\n return cssProperty;\n}\n\nexport function getCorrectEventName(windowObj: Window, eventType: StandardJsEventType):\n StandardJsEventType | PrefixedJsEventType {\n if (isWindow(windowObj) && eventType in jsEventTypeMap) {\n const el = windowObj.document.createElement('div');\n const {standard, prefixed, cssProperty} = jsEventTypeMap[eventType];\n const isStandard = cssProperty in el.style;\n return isStandard ? standard : prefixed;\n }\n return eventType;\n}\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {MDCFoundation} from './foundation';\nimport {CustomEventListener, EventType, SpecificEventListener} from './types';\n\nexport class MDCComponent<FoundationType extends MDCFoundation> {\n static attachTo(root: Element): MDCComponent<MDCFoundation<{}>> {\n // Subclasses which extend MDCBase should provide an attachTo() method that takes a root element and\n // returns an instantiated component with its root set to that element. Also note that in the cases of\n // subclasses, an explicit foundation class will not have to be passed in; it will simply be initialized\n // from getDefaultFoundation().\n return new MDCComponent(root, new MDCFoundation({}));\n }\n\n protected foundation: FoundationType;\n\n constructor(\n public root: Element, foundation?: FoundationType, ...args: unknown[]) {\n this.initialize(...args);\n // Note that we initialize foundation here and not within the constructor's\n // default param so that this.root is defined and can be used within the\n // foundation class.\n this.foundation =\n foundation === undefined ? this.getDefaultFoundation() : foundation;\n this.foundation.init();\n this.initialSyncWithDOM();\n }\n\n /* istanbul ignore next: method param only exists for typing purposes; it does not need to be unit tested */\n initialize(..._args: Array<unknown>) {\n // Subclasses can override this to do any additional setup work that would be considered part of a\n // \"constructor\". Essentially, it is a hook into the parent constructor before the foundation is\n // initialized. Any additional arguments besides root and foundation will be passed in here.\n }\n\n getDefaultFoundation(): FoundationType {\n // Subclasses must override this method to return a properly configured foundation class for the\n // component.\n throw new Error('Subclasses must override getDefaultFoundation to return a properly configured ' +\n 'foundation class');\n }\n\n initialSyncWithDOM() {\n // Subclasses should override this method if they need to perform work to synchronize with a host DOM\n // object. An example of this would be a form control wrapper that needs to synchronize its internal state\n // to some property or attribute of the host DOM. Please note: this is *not* the place to perform DOM\n // reads/writes that would cause layout / paint, as this is called synchronously from within the constructor.\n }\n\n destroy() {\n // Subclasses may implement this method to release any resources / deregister any listeners they have\n // attached. An example of this might be deregistering a resize event from the window object.\n this.foundation.destroy();\n }\n\n /**\n * Wrapper method to add an event listener to the component's root element. This is most useful when\n * listening for custom events.\n */\n listen<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>, options?: AddEventListenerOptions | boolean): void;\n listen<E extends Event>(\n evtType: string, handler: CustomEventListener<E>, options?: AddEventListenerOptions | boolean): void;\n listen(evtType: string, handler: EventListener, options?: AddEventListenerOptions | boolean) {\n this.root.addEventListener(evtType, handler, options);\n }\n\n /**\n * Wrapper method to remove an event listener to the component's root element. This is most useful when\n * unlistening for custom events.\n */\n unlisten<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>, options?: AddEventListenerOptions | boolean): void;\n unlisten<E extends Event>(\n evtType: string, handler: CustomEventListener<E>, options?: AddEventListenerOptions | boolean): void;\n unlisten(evtType: string, handler: EventListener, options?: AddEventListenerOptions | boolean) {\n this.root.removeEventListener(evtType, handler, options);\n }\n\n /**\n * Fires a cross-browser-compatible custom event from the component root of the given type, with the given data.\n */\n emit<T extends object>(evtType: string, evtData: T, shouldBubble = false) {\n let evt: CustomEvent<T>;\n if (typeof CustomEvent === 'function') {\n evt = new CustomEvent<T>(evtType, {\n bubbles: shouldBubble,\n detail: evtData,\n });\n } else {\n evt = document.createEvent('CustomEvent');\n evt.initCustomEvent(evtType, shouldBubble, false, evtData);\n }\n\n this.root.dispatchEvent(evt);\n }\n}\n\n// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.\nexport default MDCComponent;\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nexport class MDCFoundation<AdapterType extends {} = {}> {\n static get cssClasses(): { [key: string]: string } {\n // Classes extending MDCFoundation should implement this method to return an object which exports every\n // CSS class the foundation class needs as a property. e.g. {ACTIVE: 'mdc-component--active'}\n return {};\n }\n\n static get strings(): { [key: string]: string } {\n // Classes extending MDCFoundation should implement this method to return an object which exports all\n // semantic strings as constants. e.g. {ARIA_ROLE: 'tablist'}\n return {};\n }\n\n static get numbers(): { [key: string]: number } {\n // Classes extending MDCFoundation should implement this method to return an object which exports all\n // of its semantic numbers as constants. e.g. {ANIMATION_DELAY_MS: 350}\n return {};\n }\n\n static get defaultAdapter(): {} {\n // Classes extending MDCFoundation may choose to implement this getter in order to provide a convenient\n // way of viewing the necessary methods of an adapter. In the future, this could also be used for adapter\n // validation.\n return {};\n }\n\n constructor(protected adapter: AdapterType = {} as AdapterType) {}\n\n init() {\n // Subclasses should override this method to perform initialization routines (registering events, etc.)\n }\n\n destroy() {\n // Subclasses should override this method to perform de-initialization routines (de-registering events, etc.)\n }\n}\n\n/**\n * The constructor for MDCFoundation.\n */\nexport interface MDCFoundationConstructor<AdapterType extends object = any> {\n new(adapter: AdapterType): MDCFoundation<AdapterType>;\n readonly prototype: MDCFoundation<AdapterType>;\n}\n\n/**\n * The deprecated constructor for MDCFoundation.\n */\nexport interface MDCFoundationDeprecatedConstructor<AdapterType extends object = any> {\n readonly cssClasses: Record<string, string>;\n readonly strings: Record<string, string>;\n readonly numbers: Record<string, number>;\n readonly defaultAdapter: AdapterType;\n\n new(adapter?: Partial<AdapterType>): MDCFoundation<AdapterType>;\n readonly prototype: MDCFoundation<AdapterType>;\n}\n\n/**\n * Retrieves the AdapaterType from the provided MDCFoundation generic type.\n */\nexport type MDCFoundationAdapter<T> =\n T extends MDCFoundation<infer A>? A : never;\n\n// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.\nexport default MDCFoundation;\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/**\n * Determine whether the current browser supports passive event listeners, and\n * if so, use them.\n */\nexport function applyPassive(globalObj: Window = window):\n boolean | EventListenerOptions {\n return supportsPassiveOption(globalObj) ?\n {passive: true} as AddEventListenerOptions :\n false;\n}\n\nfunction supportsPassiveOption(globalObj: Window = window): boolean {\n // See\n // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener\n let passiveSupported = false;\n\n try {\n const options = {\n // This function will be called when the browser\n // attempts to access the passive property.\n get passive() {\n passiveSupported = true;\n return false;\n }\n };\n\n const handler = () => {};\n globalObj.document.addEventListener('test', handler, options);\n globalObj.document.removeEventListener(\n 'test', handler, options as EventListenerOptions);\n } catch (err) {\n passiveSupported = false;\n }\n\n return passiveSupported;\n}\n","/**\n * @license\n * Copyright 2018 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/**\n * @fileoverview A \"ponyfill\" is a polyfill that doesn't modify the global prototype chain.\n * This makes ponyfills safer than traditional polyfills, especially for libraries like MDC.\n */\n\nexport function closest(element: Element, selector: string): Element | null {\n if (element.closest) {\n return element.closest(selector);\n }\n\n let el: Element | null = element;\n while (el) {\n if (matches(el, selector)) {\n return el;\n }\n el = el.parentElement;\n }\n return null;\n}\n\nexport function matches(element: Element, selector: string): boolean {\n const nativeMatches = element.matches\n || element.webkitMatchesSelector\n || (element as any).msMatchesSelector;\n return nativeMatches.call(element, selector);\n}\n\n/**\n * Used to compute the estimated scroll width of elements. When an element is\n * hidden due to display: none; being applied to a parent element, the width is\n * returned as 0. However, the element will have a true width once no longer\n * inside a display: none context. This method computes an estimated width when\n * the element is hidden or returns the true width when the element is visble.\n * @param {Element} element the element whose width to estimate\n */\nexport function estimateScrollWidth(element: Element): number {\n // Check the offsetParent. If the element inherits display: none from any\n // parent, the offsetParent property will be null (see\n // https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/offsetParent).\n // This check ensures we only clone the node when necessary.\n const htmlEl = element as HTMLElement;\n if (htmlEl.offsetParent !== null) {\n return htmlEl.scrollWidth;\n }\n\n const clone = htmlEl.cloneNode(true) as HTMLElement;\n clone.style.setProperty('position', 'absolute');\n clone.style.setProperty('transform', 'translate(-9999px, -9999px)');\n document.documentElement.appendChild(clone);\n const scrollWidth = clone.scrollWidth;\n document.documentElement.removeChild(clone);\n return scrollWidth;\n}\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {MDCComponent} from '@material/base/component';\nimport {applyPassive} from '@material/dom/events';\nimport {matches} from '@material/dom/ponyfill';\nimport {MDCRippleAdapter} from './adapter';\nimport {MDCRippleFoundation} from './foundation';\nimport {MDCRippleAttachOpts, MDCRippleCapableSurface} from './types';\nimport * as util from './util';\n\nexport type MDCRippleFactory = (el: Element, foundation?: MDCRippleFoundation) => MDCRipple;\n\nexport class MDCRipple extends MDCComponent<MDCRippleFoundation> implements MDCRippleCapableSurface {\n static override attachTo(root: Element, opts: MDCRippleAttachOpts = {\n isUnbounded: undefined\n }): MDCRipple {\n const ripple = new MDCRipple(root);\n // Only override unbounded behavior if option is explicitly specified\n if (opts.isUnbounded !== undefined) {\n ripple.unbounded = opts.isUnbounded;\n }\n return ripple;\n }\n\n static createAdapter(instance: MDCRippleCapableSurface): MDCRippleAdapter {\n return {\n addClass: (className) => instance.root.classList.add(className),\n browserSupportsCssVars: () => util.supportsCssVariables(window),\n computeBoundingRect: () => instance.root.getBoundingClientRect(),\n containsEventTarget: (target) => instance.root.contains(target as Node),\n deregisterDocumentInteractionHandler: (evtType, handler) =>\n document.documentElement.removeEventListener(\n evtType, handler, applyPassive()),\n deregisterInteractionHandler: (evtType, handler) =>\n (instance.root as HTMLElement)\n .removeEventListener(evtType, handler, applyPassive()),\n deregisterResizeHandler: (handler) =>\n window.removeEventListener('resize', handler),\n getWindowPageOffset: () =>\n ({x: window.pageXOffset, y: window.pageYOffset}),\n isSurfaceActive: () => matches(instance.root, ':active'),\n isSurfaceDisabled: () => Boolean(instance.disabled),\n isUnbounded: () => Boolean(instance.unbounded),\n registerDocumentInteractionHandler: (evtType, handler) =>\n document.documentElement.addEventListener(\n evtType, handler, applyPassive()),\n registerInteractionHandler: (evtType, handler) =>\n (instance.root as HTMLElement)\n .addEventListener(evtType, handler, applyPassive()),\n registerResizeHandler: (handler) =>\n window.addEventListener('resize', handler),\n removeClass: (className) => instance.root.classList.remove(className),\n updateCssVariable: (varName, value) =>\n (instance.root as HTMLElement).style.setProperty(varName, value),\n };\n }\n\n disabled = false;\n\n private isUnbounded?: boolean;\n\n get unbounded(): boolean {\n return Boolean(this.isUnbounded);\n }\n\n set unbounded(unbounded: boolean) {\n this.isUnbounded = Boolean(unbounded);\n this.setUnbounded();\n }\n\n activate() {\n this.foundation.activate();\n }\n\n deactivate() {\n this.foundation.deactivate();\n }\n\n layout() {\n this.foundation.layout();\n }\n\n override getDefaultFoundation() {\n return new MDCRippleFoundation(MDCRipple.createAdapter(this));\n }\n\n override initialSyncWithDOM() {\n const root = this.root as HTMLElement;\n this.isUnbounded = 'mdcRippleIsUnbounded' in root.dataset;\n }\n\n /**\n * Closure Compiler throws an access control error when directly accessing a\n * protected or private property inside a getter/setter, like unbounded above.\n * By accessing the protected property inside a method, we solve that problem.\n * That's why this function exists.\n */\n private setUnbounded() {\n this.foundation.setUnbounded(Boolean(this.isUnbounded));\n }\n}\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nexport const cssClasses = {\n // Ripple is a special case where the \"root\" component is really a \"mixin\" of sorts,\n // given that it's an 'upgrade' to an existing component. That being said it is the root\n // CSS class that all other CSS classes derive from.\n BG_FOCUSED: 'mdc-ripple-upgraded--background-focused',\n FG_ACTIVATION: 'mdc-ripple-upgraded--foreground-activation',\n FG_DEACTIVATION: 'mdc-ripple-upgraded--foreground-deactivation',\n ROOT: 'mdc-ripple-upgraded',\n UNBOUNDED: 'mdc-ripple-upgraded--unbounded',\n};\n\nexport const strings = {\n VAR_FG_SCALE: '--mdc-ripple-fg-scale',\n VAR_FG_SIZE: '--mdc-ripple-fg-size',\n VAR_FG_TRANSLATE_END: '--mdc-ripple-fg-translate-end',\n VAR_FG_TRANSLATE_START: '--mdc-ripple-fg-translate-start',\n VAR_LEFT: '--mdc-ripple-left',\n VAR_TOP: '--mdc-ripple-top',\n};\n\nexport const numbers = {\n DEACTIVATION_TIMEOUT_MS: 225, // Corresponds to $mdc-ripple-translate-duration (i.e. activation animation duration)\n FG_DEACTIVATION_MS: 150, // Corresponds to $mdc-ripple-fade-out-duration (i.e. deactivation animation duration)\n INITIAL_ORIGIN_SCALE: 0.6,\n PADDING: 10,\n TAP_DELAY_MS: 300, // Delay between touch and simulated mouse events on touch devices\n};\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {MDCFoundation} from '@material/base/foundation';\nimport {MDCRippleAdapter} from './adapter';\nimport {cssClasses, numbers, strings} from './constants';\nimport {MDCRipplePoint} from './types';\nimport {getNormalizedEventCoords} from './util';\n\ninterface ActivationStateType {\n isActivated?: boolean;\n hasDeactivationUXRun?: boolean;\n wasActivatedByPointer?: boolean;\n wasElementMadeActive?: boolean;\n activationEvent?: Event;\n isProgrammatic?: boolean;\n}\n\ninterface FgTranslationCoordinates {\n startPoint: MDCRipplePoint;\n endPoint: MDCRipplePoint;\n}\n\ninterface Coordinates {\n left: number;\n top: number;\n}\n\ninterface EventHandlerNonNull {\n (event: Event): any;\n}\n\ntype ActivationEventType = 'touchstart' | 'pointerdown' | 'mousedown' | 'keydown';\ntype DeactivationEventType = 'touchend' | 'pointerup' | 'mouseup' | 'contextmenu';\n\n// Activation events registered on the root element of each instance for activation\nconst ACTIVATION_EVENT_TYPES: ActivationEventType[] = [\n 'touchstart', 'pointerdown', 'mousedown', 'keydown',\n];\n\n// Deactivation events registered on documentElement when a pointer-related down event occurs\nconst POINTER_DEACTIVATION_EVENT_TYPES: DeactivationEventType[] = [\n 'touchend', 'pointerup', 'mouseup', 'contextmenu',\n];\n\n// simultaneous nested activations\nlet activatedTargets: Array<EventTarget | null> = [];\n\nexport class MDCRippleFoundation extends MDCFoundation<MDCRippleAdapter> {\n static override get cssClasses() {\n return cssClasses;\n }\n\n static override get strings() {\n return strings;\n }\n\n static override get numbers() {\n return numbers;\n }\n\n static override get defaultAdapter(): MDCRippleAdapter {\n return {\n addClass: () => undefined,\n browserSupportsCssVars: () => true,\n computeBoundingRect: () =>\n ({top: 0, right: 0, bottom: 0, left: 0, width: 0, height: 0} as any),\n containsEventTarget: () => true,\n deregisterDocumentInteractionHandler: () => undefined,\n deregisterInteractionHandler: () => undefined,\n deregisterResizeHandler: () => undefined,\n getWindowPageOffset: () => ({x: 0, y: 0}),\n isSurfaceActive: () => true,\n isSurfaceDisabled: () => true,\n isUnbounded: () => true,\n registerDocumentInteractionHandler: () => undefined,\n registerInteractionHandler: () => undefined,\n registerResizeHandler: () => undefined,\n removeClass: () => undefined,\n updateCssVariable: () => undefined,\n };\n }\n\n private activationAnimationHasEnded = false;\n private activationState: ActivationStateType;\n private activationTimer = 0;\n private fgDeactivationRemovalTimer = 0;\n private fgScale = '0';\n private frame = {width: 0, height: 0};\n private initialSize = 0;\n private layoutFrame = 0;\n private maxRadius = 0;\n private unboundedCoords: Coordinates = {left: 0, top: 0};\n\n private readonly activationTimerCallback: () => void;\n private readonly activateHandler: EventHandlerNonNull;\n private readonly deactivateHandler: EventHandlerNonNull;\n private readonly focusHandler: EventHandlerNonNull;\n private readonly blurHandler: EventHandlerNonNull;\n private readonly resizeHandler: EventHandlerNonNull;\n\n private previousActivationEvent?: Event;\n\n constructor(adapter?: Partial<MDCRippleAdapter>) {\n super({...MDCRippleFoundation.defaultAdapter, ...adapter});\n\n this.activationState = this.defaultActivationState();\n\n this.activationTimerCallback = () => {\n this.activationAnimationHasEnded = true;\n this.runDeactivationUXLogicIfReady();\n };\n this.activateHandler = (e) => {\n this.activateImpl(e);\n };\n this.deactivateHandler = () => {\n this.deactivateImpl();\n };\n this.focusHandler = () => {\n this.handleFocus();\n };\n this.blurHandler = () => {\n this.handleBlur();\n };\n this.resizeHandler = () => {\n this.layout();\n };\n }\n\n override init() {\n const supportsPressRipple = this.supportsPressRipple();\n\n this.registerRootHandlers(supportsPressRipple);\n\n if (supportsPressRipple) {\n const {ROOT, UNBOUNDED} = MDCRippleFoundation.cssClasses;\n requestAnimationFrame(() => {\n this.adapter.addClass(ROOT);\n if (this.adapter.isUnbounded()) {\n this.adapter.addClass(UNBOUNDED);\n // Unbounded ripples need layout logic applied immediately to set coordinates for both shade and ripple\n this.layoutInternal();\n }\n });\n }\n }\n\n override destroy() {\n if (this.supportsPressRipple()) {\n if (this.activationTimer) {\n clearTimeout(this.activationTimer);\n this.activationTimer = 0;\n this.adapter.removeClass(MDCRippleFoundation.cssClasses.FG_ACTIVATION);\n }\n\n if (this.fgDeactivationRemovalTimer) {\n clearTimeout(this.fgDeactivationRemovalTimer);\n this.fgDeactivationRemovalTimer = 0;\n this.adapter.removeClass(\n MDCRippleFoundation.cssClasses.FG_DEACTIVATION);\n }\n\n const {ROOT, UNBOUNDED} = MDCRippleFoundation.cssClasses;\n requestAnimationFrame(() => {\n this.adapter.removeClass(ROOT);\n this.adapter.removeClass(UNBOUNDED);\n this.removeCssVars();\n });\n }\n\n this.deregisterRootHandlers();\n this.deregisterDeactivationHandlers();\n }\n\n /**\n * @param evt Optional event containing position information.\n */\n activate(evt?: Event): void {\n this.activateImpl(evt);\n }\n\n deactivate(): void {\n this.deactivateImpl();\n }\n\n layout(): void {\n if (this.layoutFrame) {\n cancelAnimationFrame(this.layoutFrame);\n }\n this.layoutFrame = requestAnimationFrame(() => {\n this.layoutInternal();\n this.layoutFrame = 0;\n });\n }\n\n setUnbounded(unbounded: boolean): void {\n const {UNBOUNDED} = MDCRippleFoundation.cssClasses;\n if (unbounded) {\n this.adapter.addClass(UNBOUNDED);\n } else {\n this.adapter.removeClass(UNBOUNDED);\n }\n }\n\n handleFocus(): void {\n requestAnimationFrame(\n () => this.adapter.addClass(MDCRippleFoundation.cssClasses.BG_FOCUSED));\n }\n\n handleBlur(): void {\n requestAnimationFrame(\n () => this.adapter.removeClass(\n MDCRippleFoundation.cssClasses.BG_FOCUSED));\n }\n\n /**\n * We compute this property so that we are not querying information about the client\n * until the point in time where the foundation requests it. This prevents scenarios where\n * client-side feature-detection may happen too early, such as when components are rendered on the server\n * and then initialized at mount time on the client.\n */\n private supportsPressRipple(): boolean {\n return this.adapter.browserSupportsCssVars();\n }\n\n private defaultActivationState(): ActivationStateType {\n return {\n activationEvent: undefined,\n hasDeactivationUXRun: false,\n isActivated: false,\n isProgrammatic: false,\n wasActivatedByPointer: false,\n wasElementMadeActive: false,\n };\n }\n\n /**\n * supportsPressRipple Passed from init to save a redundant function call\n */\n private registerRootHandlers(supportsPressRipple: boolean) {\n if (supportsPressRipple) {\n for (const evtType of ACTIVATION_EVENT_TYPES) {\n this.adapter.registerInteractionHandler(evtType, this.activateHandler);\n }\n if (this.adapter.isUnbounded()) {\n this.adapter.registerResizeHandler(this.resizeHandler);\n }\n }\n\n this.adapter.registerInteractionHandler('focus', this.focusHandler);\n this.adapter.registerInteractionHandler('blur', this.blurHandler);\n }\n\n private registerDeactivationHandlers(evt: Event) {\n if (evt.type === 'keydown') {\n this.adapter.registerInteractionHandler('keyup', this.deactivateHandler);\n } else {\n for (const evtType of POINTER_DEACTIVATION_EVENT_TYPES) {\n this.adapter.registerDocumentInteractionHandler(\n evtType, this.deactivateHandler);\n }\n }\n }\n\n private deregisterRootHandlers() {\n for (const evtType of ACTIVATION_EVENT_TYPES) {\n this.adapter.deregisterInteractionHandler(evtType, this.activateHandler);\n }\n this.adapter.deregisterInteractionHandler('focus', this.focusHandler);\n this.adapter.deregisterInteractionHandler('blur', this.blurHandler);\n\n if (this.adapter.isUnbounded()) {\n this.adapter.deregisterResizeHandler(this.resizeHandler);\n }\n }\n\n private deregisterDeactivationHandlers() {\n this.adapter.deregisterInteractionHandler('keyup', this.deactivateHandler);\n for (const evtType of POINTER_DEACTIVATION_EVENT_TYPES) {\n this.adapter.deregisterDocumentInteractionHandler(\n evtType, this.deactivateHandler);\n }\n }\n\n private removeCssVars() {\n const rippleStrings = MDCRippleFoundation.strings;\n const keys = Object.keys(rippleStrings) as Array<keyof typeof rippleStrings>;\n keys.forEach((key) => {\n if (key.indexOf('VAR_') === 0) {\n this.adapter.updateCssVariable(rippleStrings[key], null);\n }\n });\n }\n\n private activateImpl(evt?: Event) {\n if (this.adapter.isSurfaceDisabled()) {\n return;\n }\n\n const activationState = this.activationState;\n if (activationState.isActivated) {\n return;\n }\n\n // Avoid reacting to follow-on events fired by touch device after an already-processed user interaction\n const previousActivationEvent = this.previousActivationEvent;\n const isSameInteraction = previousActivationEvent && evt !== undefined && previousActivationEvent.type !== evt.type;\n if (isSameInteraction) {\n return;\n }\n\n activationState.isActivated = true;\n activationState.isProgrammatic = evt === undefined;\n activationState.activationEvent = evt;\n activationState.wasActivatedByPointer = activationState.isProgrammatic ? false : evt !== undefined && (\n evt.type === 'mousedown' || evt.type === 'touchstart' || evt.type === 'pointerdown'\n );\n\n const hasActivatedChild = evt !== undefined &&\n activatedTargets.length > 0 &&\n activatedTargets.some(\n (target) => this.adapter.containsEventTarget(target));\n if (hasActivatedChild) {\n // Immediately reset activation state, while preserving logic that prevents touch follow-on events\n this.resetActivationState();\n return;\n }\n\n if (evt !== undefined) {\n activatedTargets.push(evt.target);\n this.registerDeactivationHandlers(evt);\n }\n\n activationState.wasElementMadeActive = this.checkElementMadeActive(evt);\n if (activationState.wasElementMadeActive) {\n this.animateActivation();\n }\n\n requestAnimationFrame(() => {\n // Reset array on next frame after the current event has had a chance to bubble to prevent ancestor ripples\n activatedTargets = [];\n\n if (!activationState.wasElementMadeActive\n && evt !== undefined\n && ((evt as KeyboardEvent).key === ' ' || (evt as KeyboardEvent).keyCode === 32)) {\n // If space was pressed, try again within an rAF call to detect :active, because different UAs report\n // active states inconsistently when they're called within event handling code:\n // - https://bugs.chromium.org/p/chromium/issues/detail?id=635971\n // - https://bugzilla.mozilla.org/show_bug.cgi?id=1293741\n // We try first outside rAF to support Edge, which does not exhibit this problem, but will crash if a CSS\n // variable is set within a rAF callback for a submit button interaction (#2241).\n activationState.wasElementMadeActive = this.checkElementMadeActive(evt);\n if (activationState.wasElementMadeActive) {\n this.animateActivation();\n }\n }\n\n if (!activationState.wasElementMadeActive) {\n // Reset activation state immediately if element was not made active.\n this.activationState = this.defaultActivationState();\n }\n });\n }\n\n private checkElementMadeActive(evt?: Event) {\n return (evt !== undefined && evt.type === 'keydown') ?\n this.adapter.isSurfaceActive() :\n true;\n }\n\n private animateActivation() {\n const {VAR_FG_TRANSLATE_START, VAR_FG_TRANSLATE_END} = MDCRippleFoundation.strings;\n const {FG_DEACTIVATION, FG_ACTIVATION} = MDCRippleFoundation.cssClasses;\n const {DEACTIVATION_TIMEOUT_MS} = MDCRippleFoundation.numbers;\n\n this.layoutInternal();\n\n let translateStart = '';\n let translateEnd = '';\n\n if (!this.adapter.isUnbounded()) {\n const {startPoint, endPoint} = this.getFgTranslationCoordinates();\n translateStart = `${startPoint.x}px, ${startPoint.y}px`;\n translateEnd = `${endPoint.x}px, ${endPoint.y}px`;\n }\n\n this.adapter.updateCssVariable(VAR_FG_TRANSLATE_START, translateStart);\n this.adapter.updateCssVariable(VAR_FG_TRANSLATE_END, translateEnd);\n // Cancel any ongoing activation/deactivation animations\n clearTimeout(this.activationTimer);\n clearTimeout(this.fgDeactivationRemovalTimer);\n this.rmBoundedActivationClasses();\n this.adapter.removeClass(FG_DEACTIVATION);\n\n // Force layout in order to re-trigger the animation.\n this.adapter.computeBoundingRect();\n this.adapter.addClass(FG_ACTIVATION);\n this.activationTimer = setTimeout(() => {\n this.activationTimerCallback();\n }, DEACTIVATION_TIMEOUT_MS);\n }\n\n private getFgTranslationCoordinates(): FgTranslationCoordinates {\n const {activationEvent, wasActivatedByPointer} = this.activationState;\n\n let startPoint;\n if (wasActivatedByPointer) {\n startPoint = getNormalizedEventCoords(\n activationEvent,\n this.adapter.getWindowPageOffset(),\n this.adapter.computeBoundingRect(),\n );\n } else {\n startPoint = {\n x: this.frame.width / 2,\n y: this.frame.height / 2,\n };\n }\n // Center the element around the start point.\n startPoint = {\n x: startPoint.x - (this.initialSize / 2),\n y: startPoint.y - (this.initialSize / 2),\n };\n\n const endPoint = {\n x: (this.frame.width / 2) - (this.initialSize / 2),\n y: (this.frame.height / 2) - (this.initialSize / 2),\n };\n\n return {startPoint, endPoint};\n }\n\n private runDeactivationUXLogicIfReady() {\n // This method is called both when a pointing device is released, and when the activation animation ends.\n // The deactivation animation should only run after both of those occur.\n const {FG_DEACTIVATION} = MDCRippleFoundation.cssClasses;\n const {hasDeactivationUXRun, isActivated} = this.activationState;\n const activationHasEnded = hasDeactivationUXRun || !isActivated;\n\n if (activationHasEnded && this.activationAnimationHasEnded) {\n this.rmBoundedActivationClasses();\n this.adapter.addClass(FG_DEACTIVATION);\n this.fgDeactivationRemovalTimer = setTimeout(() => {\n this.adapter.removeClass(FG_DEACTIVATION);\n }, numbers.FG_DEACTIVATION_MS);\n }\n }\n\n private rmBoundedActivationClasses() {\n const {FG_ACTIVATION} = MDCRippleFoundation.cssClasses;\n this.adapter.removeClass(FG_ACTIVATION);\n this.activationAnimationHasEnded = false;\n this.adapter.computeBoundingRect();\n }\n\n private resetActivationState() {\n this.previousActivationEvent = this.activationState.activationEvent;\n this.activationState = this.defaultActivationState();\n // Touch devices may fire additional events for the same interaction within a short time.\n // Store the previous event until it's safe to assume that subsequent events are for new interactions.\n setTimeout(\n () => this.previousActivationEvent = undefined,\n MDCRippleFoundation.numbers.TAP_DELAY_MS);\n }\n\n private deactivateImpl(): void {\n const activationState = this.activationState;\n // This can happen in scenarios such as when you have a keyup event that blurs the element.\n if (!activationState.isActivated) {\n return;\n }\n\n const state: ActivationStateType = {...activationState};\n\n if (activationState.isProgrammatic) {\n requestAnimationFrame(() => {\n this.animateDeactivation(state);\n });\n this.resetActivationState();\n } else {\n this.deregisterDeactivationHandlers();\n requestAnimationFrame(() => {\n this.activationState.hasDeactivationUXRun = true;\n this.animateDeactivation(state);\n this.resetActivationState();\n });\n }\n }\n\n private animateDeactivation({wasActivatedByPointer, wasElementMadeActive}:\n ActivationStateType) {\n if (wasActivatedByPointer || wasElementMadeActive) {\n this.runDeactivationUXLogicIfReady();\n }\n }\n\n private layoutInternal() {\n this.frame = this.adapter.computeBoundingRect();\n const maxDim = Math.max(this.frame.height, this.frame.width);\n\n // Surface diameter is treated differently for unbounded vs. bounded ripples.\n // Unbounded ripple diameter is calculated smaller since the surface is expected to already be padded appropriately\n // to extend the hitbox, and the ripple is expected to meet the edges of the padded hitbox (which is typically\n // square). Bounded ripples, on the other hand, are fully expected to expand beyond the surface's longest diameter\n // (calculated based on the diagonal plus a constant padding), and are clipped at the surface's border via\n // `overflow: hidden`.\n const getBoundedRadius = () => {\n const hypotenuse = Math.sqrt(\n Math.pow(this.frame.width, 2) + Math.pow(this.frame.height, 2));\n return hypotenuse + MDCRippleFoundation.numbers.PADDING;\n };\n\n this.maxRadius = this.adapter.isUnbounded() ? maxDim : getBoundedRadius();\n\n // Ripple is sized as a fraction of the largest dimension of the surface, then scales up using a CSS scale transform\n const initialSize = Math.floor(maxDim * MDCRippleFoundation.numbers.INITIAL_ORIGIN_SCALE);\n // Unbounded ripple size should always be even number to equally center align.\n if (this.adapter.isUnbounded() && initialSize % 2 !== 0) {\n this.initialSize = initialSize - 1;\n } else {\n this.initialSize = initialSize;\n }\n this.fgScale = `${this.maxRadius / this.initialSize}`;\n\n this.updateLayoutCssVars();\n }\n\n private updateLayoutCssVars() {\n const {\n VAR_FG_SIZE, VAR_LEFT, VAR_TOP, VAR_FG_SCALE,\n } = MDCRippleFoundation.strings;\n\n this.adapter.updateCssVariable(VAR_FG_SIZE, `${this.initialSize}px`);\n this.adapter.updateCssVariable(VAR_FG_SCALE, this.fgScale);\n\n if (this.adapter.isUnbounded()) {\n this.unboundedCoords = {\n left: Math.round((this.frame.width / 2) - (this.initialSize / 2)),\n top: Math.round((this.frame.height / 2) - (this.initialSize / 2)),\n };\n\n this.adapter.updateCssVariable(\n VAR_LEFT, `${this.unboundedCoords.left}px`);\n this.adapter.updateCssVariable(VAR_TOP, `${this.unboundedCoords.top}px`);\n }\n }\n}\n\n// tslint:disable-next-line:no-default-export Needed for backward compatibility with MDC Web v0.44.0 and earlier.\nexport default MDCRippleFoundation;\n","/**\n * @license\n * Copyright 2016 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\nimport {MDCRipplePoint} from './types';\n\n/**\n * Stores result from supportsCssVariables to avoid redundant processing to\n * detect CSS custom variable support.\n */\nlet supportsCssVariables_: boolean | undefined;\n\nexport function supportsCssVariables(windowObj: typeof globalThis, forceRefresh = false): boolean {\n const {CSS} = windowObj;\n let supportsCssVars = supportsCssVariables_;\n if (typeof supportsCssVariables_ === 'boolean' && !forceRefresh) {\n return supportsCssVariables_;\n }\n\n const supportsFunctionPresent = CSS && typeof CSS.supports === 'function';\n if (!supportsFunctionPresent) {\n return false;\n }\n\n const explicitlySupportsCssVars = CSS.supports('--css-vars', 'yes');\n // See: https://bugs.webkit.org/show_bug.cgi?id=154669\n // See: README section on Safari\n const weAreFeatureDetectingSafari10plus = (\n CSS.supports('(--css-vars: yes)') &&\n CSS.supports('color', '#00000000')\n );\n\n supportsCssVars =\n explicitlySupportsCssVars || weAreFeatureDetectingSafari10plus;\n\n if (!forceRefresh) {\n supportsCssVariables_ = supportsCssVars;\n }\n return supportsCssVars;\n}\n\nexport function getNormalizedEventCoords(evt: Event | undefined, pageOffset: MDCRipplePoint, clientRect: ClientRect):\n MDCRipplePoint {\n if (!evt) {\n return {x: 0, y: 0};\n }\n const {x, y} = pageOffset;\n const documentX = x + clientRect.left;\n const documentY = y + clientRect.top;\n\n let normalizedX;\n let normalizedY;\n // Determine touch point relative to the ripple container.\n if (evt.type === 'touchstart') {\n const touchEvent = evt as TouchEvent;\n normalizedX = touchEvent.changedTouches[0].pageX - documentX;\n normalizedY = touchEvent.changedTouches[0].pageY - documentY;\n } else {\n const mouseEvent = evt as MouseEvent;\n normalizedX = mouseEvent.pageX - documentX;\n normalizedY = mouseEvent.pageY - documentY;\n }\n\n return {x: normalizedX, y: normalizedY};\n}\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {EventType, SpecificEventListener} from '@material/base/types';\n\nimport {Thumb, TickMark} from './types';\n\n/**\n * Defines the shape of the adapter expected by the foundation.\n * Implement this adapter for your framework of choice to delegate updates to\n * the component in your framework of choice. See architecture documentation\n * for more details.\n * https://github.com/material-components/material-components-web/blob/master/docs/code/architecture.md\n */\nexport interface MDCSliderAdapter {\n /**\n * @return Returns true if the slider root element has the given class.\n */\n hasClass(className: string): boolean;\n\n /**\n * Adds the given class to the slider root element.\n */\n addClass(className: string): void;\n\n /**\n * Removes the given class from the slider root element.\n */\n removeClass(className: string): void;\n\n /**\n * @return Returns the given attribute value on the slider root element.\n */\n getAttribute(attribute: string): string|null;\n\n /**\n * Adds the class to the given thumb element.\n */\n addThumbClass(className: string, thumb: Thumb): void;\n\n /**\n * Removes the class from the given thumb element.\n */\n removeThumbClass(className: string, thumb: Thumb): void;\n\n /**\n * - If thumb is `Thumb.START`, returns the value property on the start input\n * (for range slider variant).\n * - If thumb is `Thumb.END`, returns the value property on the end input (or\n * only input for single point slider).\n */\n getInputValue(thumb: Thumb): string;\n\n /**\n * - If thumb is `Thumb.START`, sets the value property on the start input\n * (for range slider variant).\n * - If thumb is `Thumb.END`, sets the value property on the end input (or\n * only input for single point slider).\n */\n setInputValue(value: string, thumb: Thumb): void;\n\n /**\n * - If thumb is `Thumb.START`, returns the attribute value on the start input\n * (for range slider variant).\n * - If thumb is `Thumb.END`, returns the attribute value on the end input (or\n * only input for single point slider).\n */\n getInputAttribute(attribute: string, thumb: Thumb): string|null;\n\n /**\n * - If thumb is `Thumb.START`, sets the attribute on the start input\n * (for range slider variant).\n * - If thumb is `Thumb.END`, sets the attribute on the end input (or\n * only input for single point slider).\n */\n setInputAttribute(attribute: string, value: string, thumb: Thumb): void;\n\n /**\n * - If thumb is `Thumb.START`, removes the attribute on the start input\n * (for range slider variant).\n * - If thumb is `Thumb.END`, removes the attribute on the end input (or\n * only input for single point slider).\n */\n removeInputAttribute(attribute: string, thumb: Thumb): void;\n\n /**\n * - If thumb is `Thumb.START`, focuses start input (range slider variant).\n * - If thumb is `Thumb.END`, focuses end input (or only input for single\n * point slider).\n */\n focusInput(thumb: Thumb): void;\n\n /**\n * @return Returns true if the given input is focused.\n */\n isInputFocused(thumb: Thumb): boolean;\n\n /**\n * @return Returns the width of the given thumb knob.\n */\n getThumbKnobWidth(thumb: Thumb): number;\n\n /**\n * @return Returns the bounding client rect of the given thumb.\n */\n getThumbBoundingClientRect(thumb: Thumb): ClientRect;\n\n /**\n * @return Returns the bounding client rect for the slider root element.\n */\n getBoundingClientRect(): ClientRect;\n\n /**\n * @return Returns true if the root element is RTL, otherwise false\n */\n isRTL(): boolean;\n\n /**\n * Sets a style property of the thumb element to the passed value.\n * - If thumb is `Thumb.START`, sets style on the start thumb (for\n * range slider variant).\n * - If thumb is `Thumb.END`, sets style on the end thumb (or only thumb\n * for single point slider).\n */\n setThumbStyleProperty(propertyName: string, value: string, thumb: Thumb):\n void;\n\n /**\n * Removes the given style property from the thumb element.\n * - If thumb is `Thumb.START`, removes style from the start thumb (for\n * range slider variant).\n * - If thumb is `Thumb.END`, removes style from the end thumb (or only thumb\n * for single point slider).\n */\n removeThumbStyleProperty(propertyName: string, thumb: Thumb): void;\n\n /**\n * Sets a style property of the active track element to the passed value.\n */\n setTrackActiveStyleProperty(propertyName: string, value: string): void;\n\n /**\n * Removes the given style property from the active track element.\n */\n removeTrackActiveStyleProperty(propertyName: string): void;\n\n /**\n * Sets value indicator text based on the given value.\n * - If thumb is `Thumb.START`, updates value indicator on start thumb\n * (for range slider variant).\n * - If thumb is `Thumb.END`, updates value indicator on end thumb (or\n * only thumb for single point slider).\n */\n setValueIndicatorText(value: number, thumb: Thumb): void;\n\n /**\n * Returns a function that maps the slider value to the value of the\n * `aria-valuetext` attribute on the thumb element. If null, the\n * `aria-valuetext` attribute is unchanged when the value changes.\n */\n getValueToAriaValueTextFn(): ((value: number) => string)|null;\n\n /**\n * Updates tick marks container element with tick mark elements and their\n * active/inactive classes, based on the given mappings:\n * - TickMark.ACTIVE => `cssClasses.TICK_MARK_ACTIVE`\n * - TickMark.INACTIVE => `cssClasses.TICK_MARK_INACTIVE`\n */\n updateTickMarks(tickMarks: TickMark[]): void;\n\n /**\n * Sets pointer capture on the slider root.\n * https://developer.mozilla.org/en-US/docs/Web/API/Element/setPointerCapture\n */\n setPointerCapture(pointerId: number): void;\n\n /**\n * Emits a `change` event from the slider root, indicating that the value\n * has been changed and committed on the given thumb, from a user event.\n * Mirrors the native `change` event:\n * https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/change_event\n */\n emitChangeEvent(value: number, thumb: Thumb): void;\n\n /**\n * Emits an `input` event from the slider root, indicating that the value\n * has been changed on the given thumb, from a user event.\n * Mirrors the native `input` event:\n * https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/input_event\n */\n emitInputEvent(value: number, thumb: Thumb): void;\n\n /**\n * Emits an event on drag start, containing the current value on the\n * thumb being dragged.\n */\n emitDragStartEvent(value: number, thumb: Thumb): void;\n\n /**\n * Emits an event on drag end, containing the final value on the\n * thumb that was dragged.\n */\n emitDragEndEvent(value: number, thumb: Thumb): void;\n\n /**\n * Registers an event listener on the root element.\n */\n registerEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Deregisters an event listener on the root element.\n */\n deregisterEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Registers an event listener on the given thumb element.\n */\n registerThumbEventHandler<K extends EventType>(\n thumb: Thumb, evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Deregisters an event listener on the given thumb element.\n */\n deregisterThumbEventHandler<K extends EventType>(\n thumb: Thumb, evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Registers an event listener on the given input element.\n */\n registerInputEventHandler<K extends EventType>(\n thumb: Thumb, evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Deregisters an event listener on the given input element.\n */\n deregisterInputEventHandler<K extends EventType>(\n thumb: Thumb, evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Registers an event listener on the body element.\n */\n registerBodyEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Deregisters an event listener on the body element.\n */\n deregisterBodyEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Registers an event listener on the window.\n */\n registerWindowEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n\n /**\n * Deregisters an event listener on the window.\n */\n deregisterWindowEventHandler<K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>): void;\n}\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {MDCComponent} from '@material/base/component';\nimport {EventType, SpecificEventListener} from '@material/base/types';\nimport {applyPassive} from '@material/dom/events';\nimport {matches} from '@material/dom/ponyfill';\nimport {MDCRippleAdapter} from '@material/ripple/adapter';\nimport {MDCRipple} from '@material/ripple/component';\nimport {MDCRippleFoundation} from '@material/ripple/foundation';\n\nimport {MDCSliderAdapter} from './adapter';\nimport {cssClasses, events} from './constants';\nimport {MDCSliderFoundation} from './foundation';\nimport {MDCSliderChangeEventDetail, Thumb, TickMark} from './types';\n\n/** Vanilla JS implementation of slider component. */\nexport class MDCSlider extends MDCComponent<MDCSliderFoundation> {\n static override attachTo(root: Element, options: {\n skipInitialUIUpdate?: boolean\n } = {}) {\n return new MDCSlider(root, undefined, options);\n }\n\n override root!: HTMLElement; // Assigned in MDCComponent constructor.\n private inputs!: HTMLInputElement[]; // Assigned in #initialize.\n private thumbs!: HTMLElement[]; // Assigned in #initialize.\n private trackActive!: HTMLElement; // Assigned in #initialize.\n private ripples!: MDCRipple[]; // Assigned in #initialize.\n\n private skipInitialUIUpdate = false;\n // Function that maps a slider value to the value of the `aria-valuetext`\n // attribute on the thumb element.\n private valueToAriaValueTextFn: ((value: number) => string)|null = null;\n\n override getDefaultFoundation() {\n // tslint:disable:object-literal-sort-keys Methods should be in the same\n // order as the adapter interface.\n const adapter: MDCSliderAdapter = {\n hasClass: (className) => this.root.classList.contains(className),\n addClass: (className) => {\n this.root.classList.add(className);\n },\n removeClass: (className) => {\n this.root.classList.remove(className);\n },\n addThumbClass: (className, thumb: Thumb) => {\n this.getThumbEl(thumb).classList.add(className);\n },\n removeThumbClass: (className, thumb: Thumb) => {\n this.getThumbEl(thumb).classList.remove(className);\n },\n getAttribute: (attribute) => this.root.getAttribute(attribute),\n getInputValue: (thumb: Thumb) => this.getInput(thumb).value,\n setInputValue: (value: string, thumb: Thumb) => {\n this.getInput(thumb).value = value;\n },\n getInputAttribute: (attribute, thumb: Thumb) =>\n this.getInput(thumb).getAttribute(attribute),\n setInputAttribute: (attribute, value, thumb: Thumb) => {\n this.getInput(thumb).setAttribute(attribute, value);\n },\n removeInputAttribute: (attribute, thumb: Thumb) => {\n this.getInput(thumb).removeAttribute(attribute);\n },\n focusInput: (thumb: Thumb) => {\n this.getInput(thumb).focus();\n },\n isInputFocused: (thumb: Thumb) =>\n this.getInput(thumb) === document.activeElement,\n getThumbKnobWidth: (thumb: Thumb) => {\n return this.getThumbEl(thumb)\n .querySelector<HTMLElement>(`.${cssClasses.THUMB_KNOB}`)!\n .getBoundingClientRect()\n .width;\n },\n getThumbBoundingClientRect: (thumb: Thumb) =>\n this.getThumbEl(thumb).getBoundingClientRect(),\n getBoundingClientRect: () => this.root.getBoundingClientRect(),\n isRTL: () => getComputedStyle(this.root).direction === 'rtl',\n setThumbStyleProperty: (propertyName, value, thumb: Thumb) => {\n this.getThumbEl(thumb).style.setProperty(propertyName, value);\n },\n removeThumbStyleProperty: (propertyName, thumb: Thumb) => {\n this.getThumbEl(thumb).style.removeProperty(propertyName);\n },\n setTrackActiveStyleProperty: (propertyName, value) => {\n this.trackActive.style.setProperty(propertyName, value);\n },\n removeTrackActiveStyleProperty: (propertyName) => {\n this.trackActive.style.removeProperty(propertyName);\n },\n setValueIndicatorText: (value: number, thumb: Thumb) => {\n const valueIndicatorEl =\n this.getThumbEl(thumb).querySelector<HTMLElement>(\n `.${cssClasses.VALUE_INDICATOR_TEXT}`);\n valueIndicatorEl!.textContent = String(value);\n },\n getValueToAriaValueTextFn: () => this.valueToAriaValueTextFn,\n updateTickMarks: (tickMarks: TickMark[]) => {\n let tickMarksContainer = this.root.querySelector<HTMLElement>(\n `.${cssClasses.TICK_MARKS_CONTAINER}`);\n if (!tickMarksContainer) {\n tickMarksContainer = document.createElement('div');\n tickMarksContainer.classList.add(cssClasses.TICK_MARKS_CONTAINER);\n const track =\n this.root.querySelector<HTMLElement>(`.${cssClasses.TRACK}`);\n track!.appendChild(tickMarksContainer);\n }\n\n if (tickMarks.length !== tickMarksContainer.children.length) {\n while (tickMarksContainer.firstChild) {\n tickMarksContainer.removeChild(tickMarksContainer.firstChild);\n }\n this.addTickMarks(tickMarksContainer, tickMarks);\n } else {\n this.updateTickMarks(tickMarksContainer, tickMarks);\n }\n },\n setPointerCapture: (pointerId) => {\n this.root.setPointerCapture(pointerId);\n },\n emitChangeEvent: (value, thumb: Thumb) => {\n this.emit<MDCSliderChangeEventDetail>(events.CHANGE, {value, thumb});\n },\n emitInputEvent: (value, thumb: Thumb) => {\n this.emit<MDCSliderChangeEventDetail>(events.INPUT, {value, thumb});\n },\n emitDragStartEvent: (_, thumb: Thumb) => {\n // Emitting event is not yet implemented. See issue:\n // https://github.com/material-components/material-components-web/issues/6448\n\n this.getRipple(thumb).activate();\n },\n emitDragEndEvent: (_, thumb: Thumb) => {\n // Emitting event is not yet implemented. See issue:\n // https://github.com/material-components/material-components-web/issues/6448\n\n this.getRipple(thumb).deactivate();\n },\n registerEventHandler: (evtType, handler) => {\n this.listen(evtType, handler);\n },\n deregisterEventHandler: (evtType, handler) => {\n this.unlisten(evtType, handler);\n },\n registerThumbEventHandler: (thumb, evtType, handler) => {\n this.getThumbEl(thumb).addEventListener(evtType, handler);\n },\n deregisterThumbEventHandler: (thumb, evtType, handler) => {\n this.getThumbEl(thumb).removeEventListener(evtType, handler);\n },\n registerInputEventHandler: (thumb, evtType, handler) => {\n this.getInput(thumb).addEventListener(evtType, handler);\n },\n deregisterInputEventHandler: (thumb, evtType, handler) => {\n this.getInput(thumb).removeEventListener(evtType, handler);\n },\n registerBodyEventHandler: (evtType, handler) => {\n document.body.addEventListener(evtType, handler);\n },\n deregisterBodyEventHandler: (evtType, handler) => {\n document.body.removeEventListener(evtType, handler);\n },\n registerWindowEventHandler: (evtType, handler) => {\n window.addEventListener(evtType, handler);\n },\n deregisterWindowEventHandler: (evtType, handler) => {\n window.removeEventListener(evtType, handler);\n },\n // tslint:enable:object-literal-sort-keys\n };\n return new MDCSliderFoundation(adapter);\n }\n\n /**\n * Initializes component, with the following options:\n * - `skipInitialUIUpdate`: Whether to skip updating the UI when initially\n * syncing with the DOM. This should be enabled when the slider position\n * is set before component initialization.\n */\n override initialize({skipInitialUIUpdate}: {skipInitialUIUpdate?:\n boolean} = {}) {\n this.inputs =\n [].slice.call(this.root.querySelectorAll(`.${cssClasses.INPUT}`)) as\n HTMLInputElement[];\n this.thumbs =\n [].slice.call(this.root.querySelectorAll(`.${cssClasses.THUMB}`)) as\n HTMLElement[];\n this.trackActive =\n this.root.querySelector(`.${cssClasses.TRACK_ACTIVE}`) as HTMLElement;\n this.ripples = this.createRipples();\n\n if (skipInitialUIUpdate) {\n this.skipInitialUIUpdate = true;\n }\n }\n\n override initialSyncWithDOM() {\n this.foundation.layout({skipUpdateUI: this.skipInitialUIUpdate});\n }\n\n /** Redraws UI based on DOM (e.g. element dimensions, RTL). */\n layout() {\n this.foundation.layout();\n }\n\n getValueStart(): number {\n return this.foundation.getValueStart();\n }\n\n setValueStart(valueStart: number) {\n this.foundation.setValueStart(valueStart);\n }\n\n getValue(): number {\n return this.foundation.getValue();\n }\n\n setValue(value: number) {\n this.foundation.setValue(value);\n }\n\n /** @return Slider disabled state. */\n getDisabled(): boolean {\n return this.foundation.getDisabled();\n }\n\n /** Sets slider disabled state. */\n setDisabled(disabled: boolean) {\n this.foundation.setDisabled(disabled);\n }\n\n /**\n * Sets a function that maps the slider value to the value of the\n * `aria-valuetext` attribute on the thumb element.\n */\n setValueToAriaValueTextFn(mapFn: ((value: number) => string)|null) {\n this.valueToAriaValueTextFn = mapFn;\n }\n\n private getThumbEl(thumb: Thumb) {\n return thumb === Thumb.END ? this.thumbs[this.thumbs.length - 1] :\n this.thumbs[0];\n }\n\n private getInput(thumb: Thumb) {\n return thumb === Thumb.END ? this.inputs[this.inputs.length - 1] :\n this.inputs[0];\n }\n\n private getRipple(thumb: Thumb) {\n return thumb === Thumb.END ? this.ripples[this.ripples.length - 1] :\n this.ripples[0];\n }\n\n /** Adds tick mark elements to the given container. */\n private addTickMarks(tickMarkContainer: HTMLElement, tickMarks: TickMark[]) {\n const fragment = document.createDocumentFragment();\n for (let i = 0; i < tickMarks.length; i++) {\n const div = document.createElement('div');\n const tickMarkClass = tickMarks[i] === TickMark.ACTIVE ?\n cssClasses.TICK_MARK_ACTIVE :\n cssClasses.TICK_MARK_INACTIVE;\n div.classList.add(tickMarkClass);\n fragment.appendChild(div);\n }\n tickMarkContainer.appendChild(fragment);\n }\n\n /** Updates tick mark elements' classes in the given container. */\n private updateTickMarks(\n tickMarkContainer: HTMLElement, tickMarks: TickMark[]) {\n const tickMarkEls = Array.from(tickMarkContainer.children);\n for (let i = 0; i < tickMarkEls.length; i++) {\n if (tickMarks[i] === TickMark.ACTIVE) {\n tickMarkEls[i].classList.add(cssClasses.TICK_MARK_ACTIVE);\n tickMarkEls[i].classList.remove(cssClasses.TICK_MARK_INACTIVE);\n } else {\n tickMarkEls[i].classList.add(cssClasses.TICK_MARK_INACTIVE);\n tickMarkEls[i].classList.remove(cssClasses.TICK_MARK_ACTIVE);\n }\n }\n }\n\n /** Initializes thumb ripples. */\n private createRipples(): MDCRipple[] {\n const ripples = [];\n const rippleSurfaces = [].slice.call(\n this.root.querySelectorAll<HTMLElement>(`.${cssClasses.THUMB}`));\n for (let i = 0; i < rippleSurfaces.length; i++) {\n const rippleSurface = rippleSurfaces[i] as HTMLElement;\n // Use the corresponding input as the focus source for the ripple (i.e.\n // when the input is focused, the ripple is in the focused state).\n const input = this.inputs[i];\n\n const adapter: MDCRippleAdapter = {\n ...MDCRipple.createAdapter(this),\n addClass: (className: string) => {\n rippleSurface.classList.add(className);\n },\n computeBoundingRect: () => rippleSurface.getBoundingClientRect(),\n deregisterInteractionHandler: <K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>) => {\n input.removeEventListener(evtType, handler);\n },\n isSurfaceActive: () => matches(input, ':active'),\n isUnbounded: () => true,\n registerInteractionHandler: <K extends EventType>(\n evtType: K, handler: SpecificEventListener<K>) => {\n input.addEventListener(evtType, handler, applyPassive());\n },\n removeClass: (className: string) => {\n rippleSurface.classList.remove(className);\n },\n updateCssVariable: (varName: string, value: string) => {\n rippleSurface.style.setProperty(varName, value);\n },\n };\n\n const ripple =\n new MDCRipple(rippleSurface, new MDCRippleFoundation(adapter));\n ripple.unbounded = true;\n ripples.push(ripple);\n }\n\n return ripples;\n }\n}\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/** Slider element classes. */\nexport const cssClasses = {\n DISABLED: 'mdc-slider--disabled',\n DISCRETE: 'mdc-slider--discrete',\n INPUT: 'mdc-slider__input',\n RANGE: 'mdc-slider--range',\n THUMB: 'mdc-slider__thumb',\n // Applied when thumb is in the focused state.\n THUMB_FOCUSED: 'mdc-slider__thumb--focused',\n THUMB_KNOB: 'mdc-slider__thumb-knob',\n // Class added to the top thumb (for overlapping thumbs in range slider).\n THUMB_TOP: 'mdc-slider__thumb--top',\n THUMB_WITH_INDICATOR: 'mdc-slider__thumb--with-indicator',\n TICK_MARKS: 'mdc-slider--tick-marks',\n TICK_MARKS_CONTAINER: 'mdc-slider__tick-marks',\n TICK_MARK_ACTIVE: 'mdc-slider__tick-mark--active',\n TICK_MARK_INACTIVE: 'mdc-slider__tick-mark--inactive',\n TRACK: 'mdc-slider__track',\n // The active track fill element that will be scaled as the value changes.\n TRACK_ACTIVE: 'mdc-slider__track--active_fill',\n VALUE_INDICATOR_TEXT: 'mdc-slider__value-indicator-text',\n};\n\n/** Slider numbers. */\nexport const numbers = {\n // Default step size.\n STEP_SIZE: 1,\n // Minimum absolute difference between clientX of move event / down event\n // for which to update thumb, in the case of overlapping thumbs.\n // This is needed to reduce chances of choosing the thumb based on\n // pointer jitter.\n THUMB_UPDATE_MIN_PX: 5,\n};\n\n/** Slider attributes. */\nexport const attributes = {\n ARIA_VALUETEXT: 'aria-valuetext',\n INPUT_DISABLED: 'disabled',\n INPUT_MIN: 'min',\n INPUT_MAX: 'max',\n INPUT_VALUE: 'value',\n INPUT_STEP: 'step',\n};\n\n/** Slider events. */\nexport const events = {\n CHANGE: 'MDCSlider:change',\n INPUT: 'MDCSlider:input',\n};\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nimport {AnimationFrame} from '@material/animation/animationframe';\nimport {getCorrectPropertyName} from '@material/animation/util';\nimport {MDCFoundation} from '@material/base/foundation';\nimport {SpecificEventListener} from '@material/base/types';\n\nimport {MDCSliderAdapter} from './adapter';\nimport {attributes, cssClasses, numbers} from './constants';\nimport {Thumb, TickMark} from './types';\n\nenum AnimationKeys {\n SLIDER_UPDATE = 'slider_update'\n}\n\n// Accessing `window` without a `typeof` check will throw on Node environments.\nconst HAS_WINDOW = typeof window !== 'undefined';\n\n/**\n * Foundation class for slider. Responsibilities include:\n * - Updating slider values (internal state and DOM updates) based on client\n * 'x' position.\n * - Updating DOM after slider property updates (e.g. min, max).\n */\nexport class MDCSliderFoundation extends MDCFoundation<MDCSliderAdapter> {\n static SUPPORTS_POINTER_EVENTS = HAS_WINDOW && Boolean(window.PointerEvent) &&\n // #setPointerCapture is buggy on iOS, so we can't use pointer events\n // until the following bug is fixed:\n // https://bugs.webkit.org/show_bug.cgi?id=220196\n !isIOS();\n\n // Whether the initial styles (to position the thumb, before component\n // initialization) have been removed.\n private initialStylesRemoved = false;\n\n private min!: number; // Assigned in init()\n private max!: number; // Assigned in init()\n // If `isRange`, this is the value of Thumb.START. Otherwise, defaults to min.\n private valueStart!: number; // Assigned in init()\n // If `isRange`, this it the value of Thumb.END. Otherwise, it is the\n // value of the single thumb.\n private value!: number; // Assigned in init()\n private rect!: ClientRect; // Assigned in layout() via init()\n\n private isDisabled = false;\n\n private isDiscrete = false;\n private step = numbers.STEP_SIZE;\n // Number of digits after the decimal point to round to, when computing\n // values. This is based on the step size by default and is used to\n // avoid floating point precision errors in JS.\n private numDecimalPlaces!: number; // Assigned in init()\n private hasTickMarks = false;\n\n // The following properties are only set for range sliders.\n private isRange = false;\n // Tracks the thumb being moved across a slider pointer interaction (down,\n // move event).\n private thumb: Thumb|null = null;\n // `clientX` from the most recent down event. Used in subsequent move\n // events to determine which thumb to move (in the case of\n // overlapping thumbs).\n private downEventClientX: number|null = null;\n // `valueStart` before the most recent down event. Used in subsequent up\n // events to determine whether to fire the `change` event.\n private valueStartBeforeDownEvent!: number; // Assigned in init()\n // `value` before the most recent down event. Used in subsequent up\n // events to determine whether to fire the `change` event.\n private valueBeforeDownEvent!: number; // Assigned in init()\n // Width of the start thumb knob.\n private startThumbKnobWidth = 0;\n // Width of the end thumb knob.\n private endThumbKnobWidth = 0;\n\n private readonly animFrame: AnimationFrame;\n\n // Assigned in #initialize.\n private mousedownOrTouchstartListener!:\n SpecificEventListener<'mousedown'|'touchstart'>;\n // Assigned in #initialize.\n private moveListener!:\n SpecificEventListener<'pointermove'|'mousemove'|'touchmove'>;\n private pointerdownListener!:\n SpecificEventListener<'pointerdown'>; // Assigned in #initialize.\n private pointerupListener!:\n SpecificEventListener<'pointerup'>; // Assigned in #initialize.\n private thumbMouseenterListener!:\n SpecificEventListener<'mouseenter'>; // Assigned in #initialize.\n private thumbMouseleaveListener!:\n SpecificEventListener<'mouseleave'>; // Assigned in #initialize.\n private inputStartChangeListener!:\n SpecificEventListener<'change'>; // Assigned in #initialize.\n private inputEndChangeListener!:\n SpecificEventListener<'change'>; // Assigned in #initialize.\n private inputStartFocusListener!:\n SpecificEventListener<'focus'>; // Assigned in #initialize.\n private inputEndFocusListener!:\n SpecificEventListener<'focus'>; // Assigned in #initialize.\n private inputStartBlurListener!:\n SpecificEventListener<'blur'>; // Assigned in #initialize.\n private inputEndBlurListener!:\n SpecificEventListener<'blur'>; // Assigned in #initialize.\n private resizeListener!:\n SpecificEventListener<'resize'>; // Assigned in #initialize.\n\n constructor(adapter?: Partial<MDCSliderAdapter>) {\n super({...MDCSliderFoundation.defaultAdapter, ...adapter});\n\n this.animFrame = new AnimationFrame();\n }\n\n static override get defaultAdapter(): MDCSliderAdapter {\n // tslint:disable:object-literal-sort-keys Methods should be in the same\n // order as the adapter interface.\n return {\n hasClass: () => false,\n addClass: () => undefined,\n removeClass: () => undefined,\n addThumbClass: () => undefined,\n removeThumbClass: () => undefined,\n getAttribute: () => null,\n getInputValue: () => '',\n setInputValue: () => undefined,\n getInputAttribute: () => null,\n setInputAttribute: () => null,\n removeInputAttribute: () => null,\n focusInput: () => undefined,\n isInputFocused: () => false,\n getThumbKnobWidth: () => 0,\n getThumbBoundingClientRect: () =>\n ({top: 0, right: 0, bottom: 0, left: 0, width: 0, height: 0} as any),\n getBoundingClientRect: () =>\n ({top: 0, right: 0, bottom: 0, left: 0, width: 0, height: 0} as any),\n isRTL: () => false,\n setThumbStyleProperty: () => undefined,\n removeThumbStyleProperty: () => undefined,\n setTrackActiveStyleProperty: () => undefined,\n removeTrackActiveStyleProperty: () => undefined,\n setValueIndicatorText: () => undefined,\n getValueToAriaValueTextFn: () => null,\n updateTickMarks: () => undefined,\n setPointerCapture: () => undefined,\n emitChangeEvent: () => undefined,\n emitInputEvent: () => undefined,\n emitDragStartEvent: () => undefined,\n emitDragEndEvent: () => undefined,\n registerEventHandler: () => undefined,\n deregisterEventHandler: () => undefined,\n registerThumbEventHandler: () => undefined,\n deregisterThumbEventHandler: () => undefined,\n registerInputEventHandler: () => undefined,\n deregisterInputEventHandler: () => undefined,\n registerBodyEventHandler: () => undefined,\n deregisterBodyEventHandler: () => undefined,\n registerWindowEventHandler: () => undefined,\n deregisterWindowEventHandler: () => undefined,\n };\n // tslint:enable:object-literal-sort-keys\n }\n\n override init() {\n this.isDisabled = this.adapter.hasClass(cssClasses.DISABLED);\n this.isDiscrete = this.adapter.hasClass(cssClasses.DISCRETE);\n this.hasTickMarks = this.adapter.hasClass(cssClasses.TICK_MARKS);\n this.isRange = this.adapter.hasClass(cssClasses.RANGE);\n\n const min = this.convertAttributeValueToNumber(\n this.adapter.getInputAttribute(\n attributes.INPUT_MIN, this.isRange ? Thumb.START : Thumb.END),\n attributes.INPUT_MIN);\n const max = this.convertAttributeValueToNumber(\n this.adapter.getInputAttribute(attributes.INPUT_MAX, Thumb.END),\n attributes.INPUT_MAX);\n const value = this.convertAttributeValueToNumber(\n this.adapter.getInputAttribute(attributes.INPUT_VALUE, Thumb.END),\n attributes.INPUT_VALUE);\n const valueStart = this.isRange ?\n this.convertAttributeValueToNumber(\n this.adapter.getInputAttribute(attributes.INPUT_VALUE, Thumb.START),\n attributes.INPUT_VALUE) :\n min;\n const stepAttr =\n this.adapter.getInputAttribute(attributes.INPUT_STEP, Thumb.END);\n const step = stepAttr ?\n this.convertAttributeValueToNumber(stepAttr, attributes.INPUT_STEP) :\n this.step;\n\n this.validateProperties({min, max, value, valueStart, step});\n\n this.min = min;\n this.max = max;\n this.value = value;\n this.valueStart = valueStart;\n this.step = step;\n this.numDecimalPlaces = getNumDecimalPlaces(this.step);\n\n this.valueBeforeDownEvent = value;\n this.valueStartBeforeDownEvent = valueStart;\n\n this.mousedownOrTouchstartListener =\n this.handleMousedownOrTouchstart.bind(this);\n this.moveListener = this.handleMove.bind(this);\n this.pointerdownListener = this.handlePointerdown.bind(this);\n this.pointerupListener = this.handlePointerup.bind(this);\n this.thumbMouseenterListener = this.handleThumbMouseenter.bind(this);\n this.thumbMouseleaveListener = this.handleThumbMouseleave.bind(this);\n this.inputStartChangeListener = () => {\n this.handleInputChange(Thumb.START);\n };\n this.inputEndChangeListener = () => {\n this.handleInputChange(Thumb.END);\n };\n this.inputStartFocusListener = () => {\n this.handleInputFocus(Thumb.START);\n };\n this.inputEndFocusListener = () => {\n this.handleInputFocus(Thumb.END);\n };\n this.inputStartBlurListener = () => {\n this.handleInputBlur(Thumb.START);\n };\n this.inputEndBlurListener = () => {\n this.handleInputBlur(Thumb.END);\n };\n this.resizeListener = this.handleResize.bind(this);\n this.registerEventHandlers();\n }\n\n override destroy() {\n this.deregisterEventHandlers();\n }\n\n setMin(value: number) {\n this.min = value;\n if (!this.isRange) {\n this.valueStart = value;\n }\n this.updateUI();\n }\n\n setMax(value: number) {\n this.max = value;\n this.updateUI();\n }\n\n getMin() {\n return this.min;\n }\n\n getMax() {\n return this.max;\n }\n\n /**\n * - For single point sliders, returns the thumb value.\n * - For range (two-thumb) sliders, returns the end thumb's value.\n */\n getValue() {\n return this.value;\n }\n\n /**\n * - For single point sliders, sets the thumb value.\n * - For range (two-thumb) sliders, sets the end thumb's value.\n */\n setValue(value: number) {\n if (this.isRange && value < this.valueStart) {\n throw new Error(\n `end thumb value (${value}) must be >= start thumb ` +\n `value (${this.valueStart})`);\n }\n\n this.updateValue(value, Thumb.END);\n }\n\n /**\n * Only applicable for range sliders.\n * @return The start thumb's value.\n */\n getValueStart() {\n if (!this.isRange) {\n throw new Error('`valueStart` is only applicable for range sliders.');\n }\n\n return this.valueStart;\n }\n\n /**\n * Only applicable for range sliders. Sets the start thumb's value.\n */\n setValueStart(valueStart: number) {\n if (!this.isRange) {\n throw new Error('`valueStart` is only applicable for range sliders.');\n }\n if (this.isRange && valueStart > this.value) {\n throw new Error(\n `start thumb value (${valueStart}) must be <= end thumb ` +\n `value (${this.value})`);\n }\n\n this.updateValue(valueStart, Thumb.START);\n }\n\n setStep(value: number) {\n this.step = value;\n this.numDecimalPlaces = getNumDecimalPlaces(value);\n\n this.updateUI();\n }\n\n setIsDiscrete(value: boolean) {\n this.isDiscrete = value;\n this.updateValueIndicatorUI();\n this.updateTickMarksUI();\n }\n\n getStep() {\n return this.step;\n }\n\n setHasTickMarks(value: boolean) {\n this.hasTickMarks = value;\n this.updateTickMarksUI();\n }\n\n getDisabled() {\n return this.isDisabled;\n }\n\n /**\n * Sets disabled state, including updating styles and thumb tabindex.\n */\n setDisabled(disabled: boolean) {\n this.isDisabled = disabled;\n\n if (disabled) {\n this.adapter.addClass(cssClasses.DISABLED);\n\n if (this.isRange) {\n this.adapter.setInputAttribute(\n attributes.INPUT_DISABLED, '', Thumb.START);\n }\n this.adapter.setInputAttribute(attributes.INPUT_DISABLED, '', Thumb.END);\n } else {\n this.adapter.removeClass(cssClasses.DISABLED);\n\n if (this.isRange) {\n this.adapter.removeInputAttribute(\n attributes.INPUT_DISABLED, Thumb.START);\n }\n this.adapter.removeInputAttribute(attributes.INPUT_DISABLED, Thumb.END);\n }\n }\n\n /** @return Whether the slider is a range slider. */\n getIsRange() {\n return this.isRange;\n }\n\n /**\n * - Syncs slider boundingClientRect with the current DOM.\n * - Updates UI based on internal state.\n */\n layout({skipUpdateUI}: {skipUpdateUI?: boolean} = {}) {\n this.rect = this.adapter.getBoundingClientRect();\n if (this.isRange) {\n this.startThumbKnobWidth = this.adapter.getThumbKnobWidth(Thumb.START);\n this.endThumbKnobWidth = this.adapter.getThumbKnobWidth(Thumb.END);\n }\n\n if (!skipUpdateUI) {\n this.updateUI();\n }\n }\n\n /** Handles resize events on the window. */\n handleResize() {\n this.layout();\n }\n\n /**\n * Handles pointer down events on the slider root element.\n */\n handleDown(event: PointerEvent|MouseEvent|TouchEvent) {\n if (this.isDisabled) return;\n\n this.valueStartBeforeDownEvent = this.valueStart;\n this.valueBeforeDownEvent = this.value;\n\n const clientX = (event as MouseEvent).clientX != null ?\n (event as MouseEvent).clientX :\n (event as TouchEvent).targetTouches[0].clientX;\n this.downEventClientX = clientX;\n const value = this.mapClientXOnSliderScale(clientX);\n this.thumb = this.getThumbFromDownEvent(clientX, value);\n if (this.thumb === null) return;\n\n this.handleDragStart(event, value, this.thumb);\n this.updateValue(value, this.thumb, {emitInputEvent: true});\n }\n\n /**\n * Handles pointer move events on the slider root element.\n */\n handleMove(event: PointerEvent|MouseEvent|TouchEvent) {\n if (this.isDisabled) return;\n\n // Prevent scrolling.\n event.preventDefault();\n\n const clientX = (event as MouseEvent).clientX != null ?\n (event as MouseEvent).clientX :\n (event as TouchEvent).targetTouches[0].clientX;\n const dragAlreadyStarted = this.thumb != null;\n this.thumb = this.getThumbFromMoveEvent(clientX);\n if (this.thumb === null) return;\n\n const value = this.mapClientXOnSliderScale(clientX);\n if (!dragAlreadyStarted) {\n this.handleDragStart(event, value, this.thumb);\n this.adapter.emitDragStartEvent(value, this.thumb);\n }\n this.updateValue(value, this.thumb, {emitInputEvent: true});\n }\n\n /**\n * Handles pointer up events on the slider root element.\n */\n handleUp() {\n if (this.isDisabled || this.thumb === null) return;\n\n const oldValue = this.thumb === Thumb.START ?\n this.valueStartBeforeDownEvent :\n this.valueBeforeDownEvent;\n const newValue = this.thumb === Thumb.START ? this.valueStart : this.value;\n if (oldValue !== newValue) {\n this.adapter.emitChangeEvent(newValue, this.thumb);\n }\n\n this.adapter.emitDragEndEvent(newValue, this.thumb);\n this.thumb = null;\n }\n\n /**\n * For range, discrete slider, shows the value indicator on both thumbs.\n */\n handleThumbMouseenter() {\n if (!this.isDiscrete || !this.isRange) return;\n\n this.adapter.addThumbClass(cssClasses.THUMB_WITH_INDICATOR, Thumb.START);\n this.adapter.addThumbClass(cssClasses.THUMB_WITH_INDICATOR, Thumb.END);\n }\n\n /**\n * For range, discrete slider, hides the value indicator on both thumbs.\n */\n handleThumbMouseleave() {\n if (!this.isDiscrete || !this.isRange) return;\n if (this.adapter.isInputFocused(Thumb.START) ||\n this.adapter.isInputFocused(Thumb.END)) {\n // Leave value indicator shown if either input is focused.\n return;\n }\n\n this.adapter.removeThumbClass(cssClasses.THUMB_WITH_INDICATOR, Thumb.START);\n this.adapter.removeThumbClass(cssClasses.THUMB_WITH_INDICATOR, Thumb.END);\n }\n\n handleMousedownOrTouchstart(event: MouseEvent|TouchEvent) {\n const moveEventType =\n event.type === 'mousedown' ? 'mousemove' : 'touchmove';\n // After a down event on the slider root, listen for move events on\n // body (so the slider value is updated for events outside of the\n // slider root).\n this.adapter.registerBodyEventHandler(moveEventType, this.moveListener);\n\n const upHandler = () => {\n this.handleUp();\n\n // Once the drag is finished (up event on body), remove the move\n // handler.\n this.adapter.deregisterBodyEventHandler(moveEventType, this.moveListener);\n\n // Also stop listening for subsequent up events.\n this.adapter.deregisterEventHandler('mouseup', upHandler);\n this.adapter.deregisterEventHandler('touchend', upHandler);\n };\n\n this.adapter.registerBodyEventHandler('mouseup', upHandler);\n this.adapter.registerBodyEventHandler('touchend', upHandler);\n\n this.handleDown(event);\n }\n\n handlePointerdown(event: PointerEvent) {\n this.adapter.setPointerCapture(event.pointerId);\n this.adapter.registerEventHandler('pointermove', this.moveListener);\n\n this.handleDown(event);\n }\n\n /**\n * Handles input `change` event by setting internal slider value to match\n * input's new value.\n */\n handleInputChange(thumb: Thumb) {\n const value = Number(this.adapter.getInputValue(thumb));\n if (thumb === Thumb.START) {\n this.setValueStart(value);\n } else {\n this.setValue(value);\n }\n\n this.adapter.emitChangeEvent(\n thumb === Thumb.START ? this.valueStart : this.value, thumb);\n this.adapter.emitInputEvent(\n thumb === Thumb.START ? this.valueStart : this.value, thumb);\n }\n\n /** Shows activated state and value indicator on thumb(s). */\n handleInputFocus(thumb: Thumb) {\n this.adapter.addThumbClass(cssClasses.THUMB_FOCUSED, thumb);\n if (!this.isDiscrete) return;\n\n this.adapter.addThumbClass(cssClasses.THUMB_WITH_INDICATOR, thumb);\n if (this.isRange) {\n const otherThumb = thumb === Thumb.START ? Thumb.END : Thumb.START;\n this.adapter.addThumbClass(cssClasses.THUMB_WITH_INDICATOR, otherThumb);\n }\n }\n\n /** Removes activated state and value indicator from thumb(s). */\n handleInputBlur(thumb: Thumb) {\n this.adapter.removeThumbClass(cssClasses.THUMB_FOCUSED, thumb);\n if (!this.isDiscrete) return;\n\n this.adapter.removeThumbClass(cssClasses.THUMB_WITH_INDICATOR, thumb);\n if (this.isRange) {\n const otherThumb = thumb === Thumb.START ? Thumb.END : Thumb.START;\n this.adapter.removeThumbClass(\n cssClasses.THUMB_WITH_INDICATOR, otherThumb);\n }\n }\n\n /**\n * Emits custom dragStart event, along with focusing the underlying input.\n */\n private handleDragStart(\n event: PointerEvent|MouseEvent|TouchEvent, value: number, thumb: Thumb) {\n this.adapter.emitDragStartEvent(value, thumb);\n\n this.adapter.focusInput(thumb);\n // Prevent the input (that we just focused) from losing focus.\n event.preventDefault();\n }\n\n /**\n * @return The thumb to be moved based on initial down event.\n */\n private getThumbFromDownEvent(clientX: number, value: number): Thumb|null {\n // For single point slider, thumb to be moved is always the END (only)\n // thumb.\n if (!this.isRange) return Thumb.END;\n\n // Check if event press point is in the bounds of any thumb.\n const thumbStartRect = this.adapter.getThumbBoundingClientRect(Thumb.START);\n const thumbEndRect = this.adapter.getThumbBoundingClientRect(Thumb.END);\n const inThumbStartBounds =\n clientX >= thumbStartRect.left && clientX <= thumbStartRect.right;\n const inThumbEndBounds =\n clientX >= thumbEndRect.left && clientX <= thumbEndRect.right;\n\n if (inThumbStartBounds && inThumbEndBounds) {\n // Thumbs overlapping. Thumb to be moved cannot be determined yet.\n return null;\n }\n\n // If press is in bounds for either thumb on down event, that's the thumb\n // to be moved.\n if (inThumbStartBounds) {\n return Thumb.START;\n }\n if (inThumbEndBounds) {\n return Thumb.END;\n }\n\n // For presses outside the range, return whichever thumb is closer.\n if (value < this.valueStart) {\n return Thumb.START;\n }\n if (value > this.value) {\n return Thumb.END;\n }\n\n // For presses inside the range, return whichever thumb is closer.\n return (value - this.valueStart <= this.value - value) ? Thumb.START :\n Thumb.END;\n }\n\n /**\n * @return The thumb to be moved based on move event (based on drag\n * direction from original down event). Only applicable if thumbs\n * were overlapping in the down event.\n */\n private getThumbFromMoveEvent(clientX: number): Thumb|null {\n // Thumb has already been chosen.\n if (this.thumb !== null) return this.thumb;\n\n if (this.downEventClientX === null) {\n throw new Error('`downEventClientX` is null after move event.');\n }\n\n const moveDistanceUnderThreshold =\n Math.abs(this.downEventClientX - clientX) < numbers.THUMB_UPDATE_MIN_PX;\n if (moveDistanceUnderThreshold) return this.thumb;\n\n const draggedThumbToLeft = clientX < this.downEventClientX;\n if (draggedThumbToLeft) {\n return this.adapter.isRTL() ? Thumb.END : Thumb.START;\n } else {\n return this.adapter.isRTL() ? Thumb.START : Thumb.END;\n }\n }\n\n /**\n * Updates UI based on internal state.\n * @param thumb Thumb whose value is being updated. If undefined, UI is\n * updated for both thumbs based on current internal state.\n */\n private updateUI(thumb?: Thumb) {\n this.updateThumbAndInputAttributes(thumb);\n this.updateThumbAndTrackUI(thumb);\n this.updateValueIndicatorUI(thumb);\n this.updateTickMarksUI();\n }\n\n /**\n * Updates thumb and input attributes based on current value.\n * @param thumb Thumb whose aria attributes to update.\n */\n private updateThumbAndInputAttributes(thumb?: Thumb) {\n if (!thumb) return;\n\n const value =\n this.isRange && thumb === Thumb.START ? this.valueStart : this.value;\n const valueStr = String(value);\n this.adapter.setInputAttribute(attributes.INPUT_VALUE, valueStr, thumb);\n if (this.isRange && thumb === Thumb.START) {\n this.adapter.setInputAttribute(attributes.INPUT_MIN, valueStr, Thumb.END);\n } else if (this.isRange && thumb === Thumb.END) {\n this.adapter.setInputAttribute(\n attributes.INPUT_MAX, valueStr, Thumb.START);\n }\n\n // Sync attribute with property.\n if (this.adapter.getInputValue(thumb) !== valueStr) {\n this.adapter.setInputValue(valueStr, thumb);\n }\n\n const valueToAriaValueTextFn = this.adapter.getValueToAriaValueTextFn();\n if (valueToAriaValueTextFn) {\n this.adapter.setInputAttribute(\n attributes.ARIA_VALUETEXT, valueToAriaValueTextFn(value), thumb);\n }\n }\n\n /**\n * Updates value indicator UI based on current value.\n * @param thumb Thumb whose value indicator to update. If undefined, all\n * thumbs' value indicators are updated.\n */\n private updateValueIndicatorUI(thumb?: Thumb) {\n if (!this.isDiscrete) return;\n\n const value =\n this.isRange && thumb === Thumb.START ? this.valueStart : this.value;\n this.adapter.setValueIndicatorText(\n value, thumb === Thumb.START ? Thumb.START : Thumb.END);\n\n if (!thumb && this.isRange) {\n this.adapter.setValueIndicatorText(this.valueStart, Thumb.START);\n }\n }\n\n /**\n * Updates tick marks UI within slider, based on current min, max, and step.\n */\n private updateTickMarksUI() {\n if (!this.isDiscrete || !this.hasTickMarks) return;\n\n const numTickMarksInactiveStart = (this.valueStart - this.min) / this.step;\n const numTickMarksActive = (this.value - this.valueStart) / this.step + 1;\n const numTickMarksInactiveEnd = (this.max - this.value) / this.step;\n const tickMarksInactiveStart =\n Array.from<TickMark>({length: numTickMarksInactiveStart})\n .fill(TickMark.INACTIVE);\n const tickMarksActive = Array.from<TickMark>({length: numTickMarksActive})\n .fill(TickMark.ACTIVE);\n const tickMarksInactiveEnd =\n Array.from<TickMark>({length: numTickMarksInactiveEnd})\n .fill(TickMark.INACTIVE);\n\n this.adapter.updateTickMarks(tickMarksInactiveStart.concat(tickMarksActive)\n .concat(tickMarksInactiveEnd));\n }\n\n /** Maps clientX to a value on the slider scale. */\n private mapClientXOnSliderScale(clientX: number): number {\n const xPos = clientX - this.rect.left;\n let pctComplete = xPos / this.rect.width;\n if (this.adapter.isRTL()) {\n pctComplete = 1 - pctComplete;\n }\n\n // Fit the percentage complete between the range [min,max]\n // by remapping from [0, 1] to [min, min+(max-min)].\n const value = this.min + pctComplete * (this.max - this.min);\n if (value === this.max || value === this.min) {\n return value;\n }\n return Number(this.quantize(value).toFixed(this.numDecimalPlaces));\n }\n\n /** Calculates the quantized value based on step value. */\n private quantize(value: number): number {\n const numSteps = Math.round((value - this.min) / this.step);\n return this.min + numSteps * this.step;\n }\n\n /**\n * Updates slider value (internal state and UI) based on the given value.\n */\n private updateValue(value: number, thumb: Thumb, {\n emitInputEvent,\n }: {emitInputEvent?: boolean} = {}) {\n value = this.clampValue(value, thumb);\n\n if (this.isRange && thumb === Thumb.START) {\n // Exit early if current value is the same as the new value.\n if (this.valueStart === value) return;\n\n this.valueStart = value;\n } else {\n // Exit early if current value is the same as the new value.\n if (this.value === value) return;\n\n this.value = value;\n }\n\n this.updateUI(thumb);\n\n if (emitInputEvent) {\n this.adapter.emitInputEvent(\n thumb === Thumb.START ? this.valueStart : this.value, thumb);\n }\n }\n\n /**\n * Clamps the given value for the given thumb based on slider properties:\n * - Restricts value within [min, max].\n * - If range slider, clamp start value <= end value, and\n * end value >= start value.\n */\n private clampValue(value: number, thumb: Thumb): number {\n // Clamp value to [min, max] range.\n value = Math.min(Math.max(value, this.min), this.max);\n\n const thumbStartMovedPastThumbEnd =\n this.isRange && thumb === Thumb.START && value > this.value;\n if (thumbStartMovedPastThumbEnd) {\n return this.value;\n }\n const thumbEndMovedPastThumbStart =\n this.isRange && thumb === Thumb.END && value < this.valueStart;\n if (thumbEndMovedPastThumbStart) {\n return this.valueStart;\n }\n\n return value;\n }\n\n /**\n * Updates the active track and thumb style properties to reflect current\n * value.\n */\n private updateThumbAndTrackUI(thumb?: Thumb) {\n const {max, min} = this;\n const pctComplete = (this.value - this.valueStart) / (max - min);\n const rangePx = pctComplete * this.rect.width;\n const isRtl = this.adapter.isRTL();\n\n const transformProp =\n HAS_WINDOW ? getCorrectPropertyName(window, 'transform') : 'transform';\n if (this.isRange) {\n const thumbLeftPos = this.adapter.isRTL() ?\n (max - this.value) / (max - min) * this.rect.width :\n (this.valueStart - min) / (max - min) * this.rect.width;\n const thumbRightPos = thumbLeftPos + rangePx;\n\n this.animFrame.request(AnimationKeys.SLIDER_UPDATE, () => {\n // Set active track styles, accounting for animation direction by\n // setting `transform-origin`.\n const trackAnimatesFromRight = (!isRtl && thumb === Thumb.START) ||\n (isRtl && thumb !== Thumb.START);\n if (trackAnimatesFromRight) {\n this.adapter.setTrackActiveStyleProperty('transform-origin', 'right');\n this.adapter.setTrackActiveStyleProperty('left', 'unset');\n this.adapter.setTrackActiveStyleProperty(\n 'right', `${this.rect.width - thumbRightPos}px`);\n } else {\n this.adapter.setTrackActiveStyleProperty('transform-origin', 'left');\n this.adapter.setTrackActiveStyleProperty('right', 'unset');\n this.adapter.setTrackActiveStyleProperty('left', `${thumbLeftPos}px`);\n }\n this.adapter.setTrackActiveStyleProperty(\n transformProp, `scaleX(${pctComplete})`);\n\n // Set thumb styles.\n const thumbStartPos = isRtl ? thumbRightPos : thumbLeftPos;\n const thumbEndPos = this.adapter.isRTL() ? thumbLeftPos : thumbRightPos;\n if (thumb === Thumb.START || !thumb || !this.initialStylesRemoved) {\n this.adapter.setThumbStyleProperty(\n transformProp, `translateX(${thumbStartPos}px)`, Thumb.START);\n }\n if (thumb === Thumb.END || !thumb || !this.initialStylesRemoved) {\n this.adapter.setThumbStyleProperty(\n transformProp, `translateX(${thumbEndPos}px)`, Thumb.END);\n }\n\n this.removeInitialStyles(isRtl);\n this.updateOverlappingThumbsUI(thumbStartPos, thumbEndPos, thumb);\n });\n } else {\n this.animFrame.request(AnimationKeys.SLIDER_UPDATE, () => {\n const thumbStartPos = isRtl ? this.rect.width - rangePx : rangePx;\n this.adapter.setThumbStyleProperty(\n transformProp, `translateX(${thumbStartPos}px)`, Thumb.END);\n this.adapter.setTrackActiveStyleProperty(\n transformProp, `scaleX(${pctComplete})`);\n\n this.removeInitialStyles(isRtl);\n });\n }\n }\n\n /**\n * Removes initial inline styles if not already removed. `left:<...>%`\n * inline styles can be added to position the thumb correctly before JS\n * initialization. However, they need to be removed before the JS starts\n * positioning the thumb. This is because the JS uses\n * `transform:translateX(<...>)px` (for performance reasons) to position\n * the thumb (which is not possible for initial styles since we need the\n * bounding rect measurements).\n */\n private removeInitialStyles(isRtl: boolean) {\n if (this.initialStylesRemoved) return;\n\n // Remove thumb position properties that were added for initial render.\n const position = isRtl ? 'right' : 'left';\n this.adapter.removeThumbStyleProperty(position, Thumb.END);\n if (this.isRange) {\n this.adapter.removeThumbStyleProperty(position, Thumb.START);\n }\n\n this.initialStylesRemoved = true;\n\n this.resetTrackAndThumbAnimation();\n }\n\n /**\n * Resets track/thumb animation to prevent animation when adding\n * `transform` styles to thumb initially.\n */\n private resetTrackAndThumbAnimation() {\n if (!this.isDiscrete) return;\n\n // Set transition properties to default (no animation), so that the\n // newly added `transform` styles do not animate thumb/track from\n // their default positions.\n const transitionProp = HAS_WINDOW ?\n getCorrectPropertyName(window, 'transition') :\n 'transition';\n const transitionDefault = 'all 0s ease 0s';\n this.adapter.setThumbStyleProperty(\n transitionProp, transitionDefault, Thumb.END);\n if (this.isRange) {\n this.adapter.setThumbStyleProperty(\n transitionProp, transitionDefault, Thumb.START);\n }\n this.adapter.setTrackActiveStyleProperty(transitionProp, transitionDefault);\n\n // In the next frame, remove the transition inline styles we just\n // added, such that any animations added in the CSS can now take effect.\n requestAnimationFrame(() => {\n this.adapter.removeThumbStyleProperty(transitionProp, Thumb.END);\n this.adapter.removeTrackActiveStyleProperty(transitionProp);\n if (this.isRange) {\n this.adapter.removeThumbStyleProperty(transitionProp, Thumb.START);\n }\n });\n }\n\n /**\n * Adds THUMB_TOP class to active thumb if thumb knobs overlap; otherwise\n * removes THUMB_TOP class from both thumbs.\n * @param thumb Thumb that is active (being moved).\n */\n private updateOverlappingThumbsUI(\n thumbStartPos: number, thumbEndPos: number, thumb?: Thumb) {\n let thumbsOverlap = false;\n if (this.adapter.isRTL()) {\n const startThumbLeftEdge = thumbStartPos - this.startThumbKnobWidth / 2;\n const endThumbRightEdge = thumbEndPos + this.endThumbKnobWidth / 2;\n thumbsOverlap = endThumbRightEdge >= startThumbLeftEdge;\n } else {\n const startThumbRightEdge = thumbStartPos + this.startThumbKnobWidth / 2;\n const endThumbLeftEdge = thumbEndPos - this.endThumbKnobWidth / 2;\n thumbsOverlap = startThumbRightEdge >= endThumbLeftEdge;\n }\n\n if (thumbsOverlap) {\n this.adapter.addThumbClass(\n cssClasses.THUMB_TOP,\n // If no thumb was dragged (in the case of initial layout), end\n // thumb is on top by default.\n thumb || Thumb.END);\n this.adapter.removeThumbClass(\n cssClasses.THUMB_TOP,\n thumb === Thumb.START ? Thumb.END : Thumb.START);\n } else {\n this.adapter.removeThumbClass(cssClasses.THUMB_TOP, Thumb.START);\n this.adapter.removeThumbClass(cssClasses.THUMB_TOP, Thumb.END);\n }\n }\n\n /**\n * Converts attribute value to a number, e.g. '100' => 100. Throws errors\n * for invalid values.\n * @param attributeValue Attribute value, e.g. 100.\n * @param attributeName Attribute name, e.g. `aria-valuemax`.\n */\n private convertAttributeValueToNumber(\n attributeValue: string|null, attributeName: string) {\n if (attributeValue === null) {\n throw new Error(\n `MDCSliderFoundation: \\`${attributeName}\\` must be non-null.`);\n }\n\n const value = Number(attributeValue);\n if (isNaN(value)) {\n throw new Error(\n `MDCSliderFoundation: \\`${attributeName}\\` value is ` +\n `\\`${attributeValue}\\`, but must be a number.`);\n }\n\n return value;\n }\n\n /** Checks that the given properties are valid slider values. */\n private validateProperties({min, max, value, valueStart, step}: {\n min: number,\n max: number,\n value: number,\n valueStart: number,\n step: number\n }) {\n if (min >= max) {\n throw new Error(\n `MDCSliderFoundation: min must be strictly less than max. ` +\n `Current: [min: ${min}, max: ${max}]`);\n }\n\n if (step <= 0) {\n throw new Error(\n `MDCSliderFoundation: step must be a positive number. ` +\n `Current step: ${this.step}`);\n }\n\n if (this.isRange) {\n if (value < min || value > max || valueStart < min || valueStart > max) {\n throw new Error(\n `MDCSliderFoundation: values must be in [min, max] range. ` +\n `Current values: [start value: ${valueStart}, end value: ${\n value}]`);\n }\n\n if (valueStart > value) {\n throw new Error(\n `MDCSliderFoundation: start value must be <= end value. ` +\n `Current values: [start value: ${valueStart}, end value: ${\n value}]`);\n }\n\n const numStepsValueStartFromMin = (valueStart - min) / step;\n const numStepsValueFromMin = (value - min) / step;\n if ((numStepsValueStartFromMin % 1) !== 0 ||\n (numStepsValueFromMin % 1) !== 0) {\n throw new Error(\n `MDCSliderFoundation: Slider values must be valid based on the ` +\n `step value. Current values: [start value: ${valueStart}, ` +\n `end value: ${value}]`);\n }\n } else { // Single point slider.\n if (value < min || value > max) {\n throw new Error(\n `MDCSliderFoundation: value must be in [min, max] range. ` +\n `Current value: ${value}`);\n }\n\n const numStepsValueFromMin = (value - min) / step;\n if ((numStepsValueFromMin % 1) !== 0) {\n throw new Error(\n `MDCSliderFoundation: Slider value must be valid based on the ` +\n `step value. Current value: ${value}`);\n }\n }\n }\n\n private registerEventHandlers() {\n this.adapter.registerWindowEventHandler('resize', this.resizeListener);\n\n if (MDCSliderFoundation.SUPPORTS_POINTER_EVENTS) {\n // If supported, use pointer events API with #setPointerCapture.\n this.adapter.registerEventHandler(\n 'pointerdown', this.pointerdownListener);\n this.adapter.registerEventHandler('pointerup', this.pointerupListener);\n } else {\n // Otherwise, fall back to mousedown/touchstart events.\n this.adapter.registerEventHandler(\n 'mousedown', this.mousedownOrTouchstartListener);\n this.adapter.registerEventHandler(\n 'touchstart', this.mousedownOrTouchstartListener);\n }\n\n if (this.isRange) {\n this.adapter.registerThumbEventHandler(\n Thumb.START, 'mouseenter', this.thumbMouseenterListener);\n this.adapter.registerThumbEventHandler(\n Thumb.START, 'mouseleave', this.thumbMouseleaveListener);\n\n this.adapter.registerInputEventHandler(\n Thumb.START, 'change', this.inputStartChangeListener);\n this.adapter.registerInputEventHandler(\n Thumb.START, 'focus', this.inputStartFocusListener);\n this.adapter.registerInputEventHandler(\n Thumb.START, 'blur', this.inputStartBlurListener);\n }\n\n this.adapter.registerThumbEventHandler(\n Thumb.END, 'mouseenter', this.thumbMouseenterListener);\n this.adapter.registerThumbEventHandler(\n Thumb.END, 'mouseleave', this.thumbMouseleaveListener);\n\n this.adapter.registerInputEventHandler(\n Thumb.END, 'change', this.inputEndChangeListener);\n this.adapter.registerInputEventHandler(\n Thumb.END, 'focus', this.inputEndFocusListener);\n this.adapter.registerInputEventHandler(\n Thumb.END, 'blur', this.inputEndBlurListener);\n }\n\n private deregisterEventHandlers() {\n this.adapter.deregisterWindowEventHandler('resize', this.resizeListener);\n\n if (MDCSliderFoundation.SUPPORTS_POINTER_EVENTS) {\n this.adapter.deregisterEventHandler(\n 'pointerdown', this.pointerdownListener);\n this.adapter.deregisterEventHandler('pointerup', this.pointerupListener);\n } else {\n this.adapter.deregisterEventHandler(\n 'mousedown', this.mousedownOrTouchstartListener);\n this.adapter.deregisterEventHandler(\n 'touchstart', this.mousedownOrTouchstartListener);\n }\n\n if (this.isRange) {\n this.adapter.deregisterThumbEventHandler(\n Thumb.START, 'mouseenter', this.thumbMouseenterListener);\n this.adapter.deregisterThumbEventHandler(\n Thumb.START, 'mouseleave', this.thumbMouseleaveListener);\n\n this.adapter.deregisterInputEventHandler(\n Thumb.START, 'change', this.inputStartChangeListener);\n this.adapter.deregisterInputEventHandler(\n Thumb.START, 'focus', this.inputStartFocusListener);\n this.adapter.deregisterInputEventHandler(\n Thumb.START, 'blur', this.inputStartBlurListener);\n }\n\n this.adapter.deregisterThumbEventHandler(\n Thumb.END, 'mouseenter', this.thumbMouseenterListener);\n this.adapter.deregisterThumbEventHandler(\n Thumb.END, 'mouseleave', this.thumbMouseleaveListener);\n\n this.adapter.deregisterInputEventHandler(\n Thumb.END, 'change', this.inputEndChangeListener);\n this.adapter.deregisterInputEventHandler(\n Thumb.END, 'focus', this.inputEndFocusListener);\n this.adapter.deregisterInputEventHandler(\n Thumb.END, 'blur', this.inputEndBlurListener);\n }\n\n private handlePointerup() {\n this.handleUp();\n\n this.adapter.deregisterEventHandler('pointermove', this.moveListener);\n }\n}\n\nfunction isIOS() {\n // Source:\n // https://stackoverflow.com/questions/9038625/detect-if-device-is-ios\n return [\n 'iPad Simulator', 'iPhone Simulator', 'iPod Simulator', 'iPad', 'iPhone',\n 'iPod'\n ].includes(navigator.platform)\n // iPad on iOS 13 detection\n || (navigator.userAgent.includes('Mac') && 'ontouchend' in document);\n}\n\n/**\n * Given a number, returns the number of digits that appear after the\n * decimal point.\n * See\n * https://stackoverflow.com/questions/9539513/is-there-a-reliable-way-in-javascript-to-obtain-the-number-of-decimal-places-of\n */\nfunction getNumDecimalPlaces(n: number): number {\n // Pull out the fraction and the exponent.\n const match = /(?:\\.(\\d+))?(?:[eE]([+\\-]?\\d+))?$/.exec(String(n));\n // NaN or Infinity or integer.\n // We arbitrarily decide that Infinity is integral.\n if (!match) return 0;\n\n const fraction = match[1] || ''; // E.g. 1.234e-2 => 234\n const exponent = match[2] || 0; // E.g. 1.234e-2 => -2\n // Count the number of digits in the fraction and subtract the\n // exponent to simulate moving the decimal point left by exponent places.\n // 1.234e+2 has 1 fraction digit and '234'.length - 2 == 1\n // 1.234e-2 has 5 fraction digit and '234'.length - -2 == 5\n return Math.max(\n 0, // lower limit\n (fraction === '0' ? 0 : fraction.length) - Number(exponent));\n}\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\nexport * from './adapter';\nexport * from './component';\nexport * from './constants';\nexport * from './foundation';\nexport * from './types';\n","/**\n * @license\n * Copyright 2020 Google Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a copy\n * of this software and associated documentation files (the \"Software\"), to deal\n * in the Software without restriction, including without limitation the rights\n * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n * copies of the Software, and to permit persons to whom the Software is\n * furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included in\n * all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\n * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n * THE SOFTWARE.\n */\n\n/** Tick mark enum, for discrete sliders. */\nexport enum TickMark {\n ACTIVE,\n INACTIVE,\n}\n\n/**\n * Thumb types: range slider has two thumbs (START, END) whereas single point\n * slider only has one thumb (END).\n */\nexport enum Thumb {\n // Thumb at start of slider (e.g. in LTR mode, left thumb on range slider).\n START = 1,\n // Thumb at end of slider (e.g. in LTR mode, right thumb on range slider,\n // or only thumb on single point slider).\n END,\n}\n\n/** Interface for `detail` of slider custom change and input events. */\nexport interface MDCSliderChangeEventDetail {\n // The new value after change.\n value: number;\n\n // The thumb for which the value has changed:\n // - For single point slider, this will always be Thumb.END.\n // - For range slider, either Thumb.START or Thumb.END.\n thumb: Thumb;\n}\n"],"sourceRoot":""} |