| 1 | {"version":3,"file":"workbox-window.dev.umd.js","sources":["../_version.mjs","../messageSW.mjs","../../workbox-core/_version.mjs","../../workbox-core/_private/Deferred.mjs","../../workbox-core/_private/logger.mjs","../utils/EventTargetShim.mjs","../utils/urlsMatch.mjs","../utils/WorkboxEvent.mjs","../Workbox.mjs","../index.mjs"],"sourcesContent":["try{self['workbox:window:4.3.0']&&_()}catch(e){}// eslint-disable-line","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport './_version.mjs';\n\n\n/**\n * Sends a data object to a service worker via `postMessage` and resolves with\n * a response (if any).\n *\n * A response can be set in a message handler in the service worker by\n * calling `event.ports[0].postMessage(...)`, which will resolve the promise\n * returned by `messageSW()`. If no response is set, the promise will not\n * resolve.\n *\n * @param {ServiceWorker} sw The service worker to send the message to.\n * @param {Object} data An object to send to the service worker.\n * @return {Promise<Object|undefined>}\n *\n * @memberof module:workbox-window\n */\nconst messageSW = (sw, data) => {\n return new Promise((resolve) => {\n let messageChannel = new MessageChannel();\n messageChannel.port1.onmessage = (evt) => resolve(evt.data);\n sw.postMessage(data, [messageChannel.port2]);\n });\n};\n\nexport {messageSW};\n","try{self['workbox:core:4.3.0']&&_()}catch(e){}// eslint-disable-line","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport '../_version.mjs';\n\n\n/**\n * The Deferred class composes Promises in a way that allows for them to be\n * resolved or rejected from outside the constructor. In most cases promises\n * should be used directly, but Deferreds can be necessary when the logic to\n * resolve a promise must be separate.\n *\n * @private\n */\nexport class Deferred {\n /**\n * Creates a promise and exposes its resolve and reject functions as methods.\n */\n constructor() {\n this.promise = new Promise((resolve, reject) => {\n this.resolve = resolve;\n this.reject = reject;\n });\n }\n}\n","/*\n Copyright 2019 Google LLC\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport '../_version.mjs';\n\n\nconst logger = process.env.NODE_ENV === 'production' ? null : (() => {\n let inGroup = false;\n\n const methodToColorMap = {\n debug: `#7f8c8d`, // Gray\n log: `#2ecc71`, // Green\n warn: `#f39c12`, // Yellow\n error: `#c0392b`, // Red\n groupCollapsed: `#3498db`, // Blue\n groupEnd: null, // No colored prefix on groupEnd\n };\n\n const print = function(method, args) {\n if (method === 'groupCollapsed') {\n // Safari doesn't print all console.groupCollapsed() arguments:\n // https://bugs.webkit.org/show_bug.cgi?id=182754\n if (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {\n console[method](...args);\n return;\n }\n }\n\n const styles = [\n `background: ${methodToColorMap[method]}`,\n `border-radius: 0.5em`,\n `color: white`,\n `font-weight: bold`,\n `padding: 2px 0.5em`,\n ];\n\n // When in a group, the workbox prefix is not displayed.\n const logPrefix = inGroup ? [] : ['%cworkbox', styles.join(';')];\n\n console[method](...logPrefix, ...args);\n\n if (method === 'groupCollapsed') {\n inGroup = true;\n }\n if (method === 'groupEnd') {\n inGroup = false;\n }\n };\n\n const api = {};\n for (const method of Object.keys(methodToColorMap)) {\n api[method] = (...args) => {\n print(method, args);\n };\n }\n\n return api;\n})();\n\nexport {logger};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport '../_version.mjs';\n\n\n/**\n * A minimal `EventTarget` shim.\n * This is necessary because not all browsers support constructable\n * `EventTarget`, so using a real `EventTarget` will error.\n * @private\n */\nclass EventTargetShim {\n /**\n * Creates an event listener registry\n *\n * @private\n */\n constructor() {\n // A registry of event types to listeners.\n this._eventListenerRegistry = {};\n }\n /**\n * @param {string} type\n * @param {Function} listener\n * @private\n */\n addEventListener(type, listener) {\n this._getEventListenersByType(type).add(listener);\n }\n\n /**\n * @param {string} type\n * @param {Function} listener\n * @private\n */\n removeEventListener(type, listener) {\n this._getEventListenersByType(type).delete(listener);\n }\n\n /**\n * @param {Event} event\n * @private\n */\n dispatchEvent(event) {\n event.target = this;\n this._getEventListenersByType(event.type).forEach(\n (listener) => listener(event));\n }\n\n /**\n * Returns a Set of listeners associated with the passed event type.\n * If no handlers have been registered, an empty Set is returned.\n *\n * @param {string} type The event type.\n * @return {Set} An array of handler functions.\n * @private\n */\n _getEventListenersByType(type) {\n return this._eventListenerRegistry[type] =\n (this._eventListenerRegistry[type] || new Set());\n }\n}\n\nexport {EventTargetShim};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport '../_version.mjs';\n\n\n/**\n * Returns true if two URLs have the same `.href` property. The URLS can be\n * relative, and if they are the current location href is used to resolve URLs.\n *\n * @private\n * @param {string} url1\n * @param {string} url2\n * @return {boolean}\n */\nconst urlsMatch = (url1, url2) => {\n return new URL(url1, location).href === new URL(url2, location).href;\n};\n\nexport {urlsMatch};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport '../_version.mjs';\n\n/**\n * A minimal `Event` subclass shim.\n * This doesn't *actually* subclass `Event` because not all browsers support\n * constructable `EventTarget`, and using a real `Event` will error.\n * @private\n */\nclass WorkboxEvent {\n /**\n * @param {string} type\n * @param {Object} props\n */\n constructor(type, props) {\n Object.assign(this, props, {type});\n }\n}\n\nexport {WorkboxEvent};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport {Deferred} from 'workbox-core/_private/Deferred.mjs';\nimport {logger} from 'workbox-core/_private/logger.mjs';\nimport {messageSW} from './messageSW.mjs';\nimport {EventTargetShim} from './utils/EventTargetShim.mjs';\nimport {urlsMatch} from './utils/urlsMatch.mjs';\nimport {WorkboxEvent} from './utils/WorkboxEvent.mjs';\nimport './_version.mjs';\n\n\n// The time a SW must be in the waiting phase before we can conclude\n// `skipWaiting()` wasn't called. This 200 amount wasn't scientifically\n// chosen, but it seems to avoid false positives in my testing.\nconst WAITING_TIMEOUT_DURATION = 200;\n\n// The amount of time after a registration that we can reasonably conclude\n// that the registration didn't trigger an update.\nconst REGISTRATION_TIMEOUT_DURATION = 60000;\n\n/**\n * A class to aid in handling service worker registration, updates, and\n * reacting to service worker lifecycle events.\n *\n * @fires [message]{@link module:workbox-window.Workbox#message}\n * @fires [installed]{@link module:workbox-window.Workbox#installed}\n * @fires [waiting]{@link module:workbox-window.Workbox#waiting}\n * @fires [controlling]{@link module:workbox-window.Workbox#controlling}\n * @fires [activated]{@link module:workbox-window.Workbox#activated}\n * @fires [redundant]{@link module:workbox-window.Workbox#redundant}\n * @fires [externalinstalled]{@link module:workbox-window.Workbox#externalinstalled}\n * @fires [externalwaiting]{@link module:workbox-window.Workbox#externalwaiting}\n * @fires [externalactivated]{@link module:workbox-window.Workbox#externalactivated}\n *\n * @memberof module:workbox-window\n */\nclass Workbox extends EventTargetShim {\n /**\n * Creates a new Workbox instance with a script URL and service worker\n * options. The script URL and options are the same as those used when\n * calling `navigator.serviceWorker.register(scriptURL, options)`. See:\n * https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/register\n *\n * @param {string} scriptURL The service worker script associated with this\n * instance.\n * @param {Object} [registerOptions] The service worker options associated\n * with this instance.\n */\n constructor(scriptURL, registerOptions = {}) {\n super();\n\n this._scriptURL = scriptURL;\n this._registerOptions = registerOptions;\n this._updateFoundCount = 0;\n\n // Deferreds we can resolve later.\n this._swDeferred = new Deferred();\n this._activeDeferred = new Deferred();\n this._controllingDeferred = new Deferred();\n\n // Bind event handler callbacks.\n this._onMessage = this._onMessage.bind(this);\n this._onStateChange = this._onStateChange.bind(this);\n this._onUpdateFound = this._onUpdateFound.bind(this);\n this._onControllerChange = this._onControllerChange.bind(this);\n }\n\n /**\n * Registers a service worker for this instances script URL and service\n * worker options. By default this method delays registration until after\n * the window has loaded.\n *\n * @param {Object} [options]\n * @param {Function} [options.immediate=false] Setting this to true will\n * register the service worker immediately, even if the window has\n * not loaded (not recommended).\n */\n async register({immediate = false} = {}) {\n if (process.env.NODE_ENV !== 'production') {\n if (this._registrationTime) {\n logger.error('Cannot re-register a Workbox instance after it has ' +\n 'been registered. Create a new instance instead.');\n return;\n }\n }\n\n if (!immediate && document.readyState !== 'complete') {\n await new Promise((res) => addEventListener('load', res));\n }\n\n // Set this flag to true if any service worker was controlling the page\n // at registration time.\n this._isUpdate = Boolean(navigator.serviceWorker.controller);\n\n // Before registering, attempt to determine if a SW is already controlling\n // the page, and if that SW script (and version, if specified) matches this\n // instance's script.\n this._compatibleControllingSW = this._getControllingSWIfCompatible();\n\n this._registration = await this._registerScript();\n\n // If we have a compatible controller, store the controller as the \"own\"\n // SW, resolve active/controlling deferreds and add necessary listeners.\n if (this._compatibleControllingSW) {\n this._sw = this._compatibleControllingSW;\n this._activeDeferred.resolve(this._compatibleControllingSW);\n this._controllingDeferred.resolve(this._compatibleControllingSW);\n\n this._reportWindowReady(this._compatibleControllingSW);\n this._compatibleControllingSW.addEventListener(\n 'statechange', this._onStateChange, {once: true});\n }\n\n // If there's a waiting service worker with a matching URL before the\n // `updatefound` event fires, it likely means that this site is open\n // in another tab, or the user refreshed the page (and thus the prevoius\n // page wasn't fully unloaded before this page started loading).\n // https://developers.google.com/web/fundamentals/primers/service-workers/lifecycle#waiting\n const waitingSW = this._registration.waiting;\n if (waitingSW && urlsMatch(waitingSW.scriptURL, this._scriptURL)) {\n // Store the waiting SW as the \"own\" Sw, even if it means overwriting\n // a compatible controller.\n this._sw = waitingSW;\n\n // Run this in the next microtask, so any code that adds an event\n // listener after awaiting `register()` will get this event.\n Promise.resolve().then(() => {\n this.dispatchEvent(new WorkboxEvent('waiting', {\n sw: waitingSW,\n wasWaitingBeforeRegister: true,\n }));\n if (process.env.NODE_ENV !== 'production') {\n logger.warn('A service worker was already waiting to activate ' +\n 'before this script was registered...');\n }\n });\n }\n\n // If an \"own\" SW is already set, resolve the deferred.\n if (this._sw) {\n this._swDeferred.resolve(this._sw);\n }\n\n if (process.env.NODE_ENV !== 'production') {\n logger.log('Successfully registered service worker.', this._scriptURL);\n\n if (navigator.serviceWorker.controller) {\n if (this._compatibleControllingSW) {\n logger.debug('A service worker with the same script URL ' +\n 'is already controlling this page.');\n } else {\n logger.debug('A service worker with a different script URL is ' +\n 'currently controlling the page. The browser is now fetching ' +\n 'the new script now...');\n }\n }\n\n const currentPageIsOutOfScope = () => {\n const scopeURL = new URL(\n this._registerOptions.scope || this._scriptURL, document.baseURI);\n const scopeURLBasePath = new URL('./', scopeURL.href).pathname;\n return !location.pathname.startsWith(scopeURLBasePath);\n };\n if (currentPageIsOutOfScope()) {\n logger.warn('The current page is not in scope for the registered ' +\n 'service worker. Was this a mistake?');\n }\n }\n\n this._registration.addEventListener('updatefound', this._onUpdateFound);\n navigator.serviceWorker.addEventListener(\n 'controllerchange', this._onControllerChange, {once: true});\n\n // Add message listeners.\n if ('BroadcastChannel' in self) {\n this._broadcastChannel = new BroadcastChannel('workbox');\n this._broadcastChannel.addEventListener('message', this._onMessage);\n }\n navigator.serviceWorker.addEventListener('message', this._onMessage);\n\n return this._registration;\n }\n\n /**\n * Resolves to the service worker registered by this instance as soon as it\n * is active. If a service worker was already controlling at registration\n * time then it will resolve to that if the script URLs (and optionally\n * script versions) match, otherwise it will wait until an update is found\n * and activates.\n *\n * @return {Promise<ServiceWorker>}\n */\n get active() {\n return this._activeDeferred.promise;\n }\n\n /**\n * Resolves to the service worker registered by this instance as soon as it\n * is controlling the page. If a service worker was already controlling at\n * registration time then it will resolve to that if the script URLs (and\n * optionally script versions) match, otherwise it will wait until an update\n * is found and starts controlling the page.\n * Note: the first time a service worker is installed it will active but\n * not start controlling the page unless `clients.claim()` is called in the\n * service worker.\n *\n * @return {Promise<ServiceWorker>}\n */\n get controlling() {\n return this._controllingDeferred.promise;\n }\n\n /**\n * Resolves with a reference to a service worker that matches the script URL\n * of this instance, as soon as it's available.\n *\n * If, at registration time, there's already an active or waiting service\n * worker with a matching script URL, it will be used (with the waiting\n * service worker taking precedence over the active service worker if both\n * match, since the waiting service worker would have been registered more\n * recently).\n * If there's no matching active or waiting service worker at registration\n * time then the promise will not resolve until an update is found and starts\n * installing, at which point the installing service worker is used.\n *\n * @return {Promise<ServiceWorker>}\n */\n async getSW() {\n // If `this._sw` is set, resolve with that as we want `getSW()` to\n // return the correct (new) service worker if an update is found.\n return this._sw || this._swDeferred.promise;\n }\n\n /**\n * Sends the passed data object to the service worker registered by this\n * instance (via [`getSW()`]{@link module:workbox-window.Workbox#getSW}) and resolves\n * with a response (if any).\n *\n * A response can be set in a message handler in the service worker by\n * calling `event.ports[0].postMessage(...)`, which will resolve the promise\n * returned by `messageSW()`. If no response is set, the promise will never\n * resolve.\n *\n * @param {Object} data An object to send to the service worker\n * @return {Promise<Object>}\n */\n async messageSW(data) {\n const sw = await this.getSW();\n return messageSW(sw, data);\n }\n\n /**\n * Checks for a service worker already controlling the page and returns\n * it if its script URL matchs.\n *\n * @private\n * @return {ServiceWorker|undefined}\n */\n _getControllingSWIfCompatible() {\n const controller = navigator.serviceWorker.controller;\n if (controller && urlsMatch(controller.scriptURL, this._scriptURL)) {\n return controller;\n }\n }\n\n /**\n * Registers a service worker for this instances script URL and register\n * options and tracks the time registration was complete.\n *\n * @private\n */\n async _registerScript() {\n try {\n const reg = await navigator.serviceWorker.register(\n this._scriptURL, this._registerOptions);\n\n // Keep track of when registration happened, so it can be used in the\n // `this._onUpdateFound` heuristic. Also use the presence of this\n // property as a way to see if `.register()` has been called.\n this._registrationTime = performance.now();\n\n return reg;\n } catch (error) {\n if (process.env.NODE_ENV !== 'production') {\n logger.error(error);\n }\n // Re-throw the error.\n throw error;\n }\n }\n\n\n /**\n * Sends a message to the passed service worker that the window is ready.\n *\n * @param {ServiceWorker} sw\n * @private\n */\n _reportWindowReady(sw) {\n messageSW(sw, {\n type: 'WINDOW_READY',\n meta: 'workbox-window',\n });\n }\n\n /**\n * @private\n */\n _onUpdateFound() {\n const installingSW = this._registration.installing;\n\n // If the script URL passed to `navigator.serviceWorker.register()` is\n // different from the current controlling SW's script URL, we know any\n // successful registration calls will trigger an `updatefound` event.\n // But if the registered script URL is the same as the current controlling\n // SW's script URL, we'll only get an `updatefound` event if the file\n // changed since it was last registered. This can be a problem if the user\n // opens up the same page in a different tab, and that page registers\n // a SW that triggers an update. It's a problem because this page has no\n // good way of knowing whether the `updatefound` event came from the SW\n // script it registered or from a registration attempt made by a newer\n // version of the page running in another tab.\n // To minimize the possibility of a false positive, we use the logic here:\n let updateLikelyTriggeredExternally =\n // Since we enforce only calling `register()` once, and since we don't\n // add the `updatefound` event listener until the `register()` call, if\n // `_updateFoundCount` is > 0 then it means this method has already\n // been called, thus this SW must be external\n this._updateFoundCount > 0 ||\n // If the script URL of the installing SW is different from this\n // instance's script URL, we know it's definitely not from our\n // registration.\n !urlsMatch(installingSW.scriptURL, this._scriptURL) ||\n // If all of the above are false, then we use a time-based heuristic:\n // Any `updatefound` event that occurs long after our registration is\n // assumed to be external.\n (performance.now() >\n this._registrationTime + REGISTRATION_TIMEOUT_DURATION) ?\n // If any of the above are not true, we assume the update was\n // triggered by this instance.\n true : false;\n\n if (updateLikelyTriggeredExternally) {\n this._externalSW = installingSW;\n this._registration.removeEventListener(\n 'updatefound', this._onUpdateFound);\n } else {\n // If the update was not triggered externally we know the installing\n // SW is the one we registered, so we set it.\n this._sw = installingSW;\n this._swDeferred.resolve(installingSW);\n\n // The `installing` state isn't something we have a dedicated\n // callback for, but we do log messages for it in development.\n if (process.env.NODE_ENV !== 'production') {\n if (navigator.serviceWorker.controller) {\n logger.log('Updated service worker found. Installing now...');\n } else {\n logger.log('Service worker is installing...');\n }\n }\n }\n\n // Increment the `updatefound` count, so future invocations of this\n // method can be sure they were triggered externally.\n ++this._updateFoundCount;\n\n // Add a `statechange` listener regardless of whether this update was\n // triggered externally, since we have callbacks for both.\n installingSW.addEventListener('statechange', this._onStateChange);\n }\n\n /**\n * @private\n * @param {Event} originalEvent\n */\n _onStateChange(originalEvent) {\n const sw = originalEvent.target;\n const {state} = sw;\n const isExternal = sw === this._externalSW;\n const eventPrefix = isExternal ? 'external' : '';\n\n const eventProps = {sw, originalEvent};\n if (!isExternal && this._isUpdate) {\n eventProps.isUpdate = true;\n }\n\n this.dispatchEvent(new WorkboxEvent(\n eventPrefix + state, eventProps));\n\n if (state === 'installed') {\n // This timeout is used to ignore cases where the service worker calls\n // `skipWaiting()` in the install event, thus moving it directly in the\n // activating state. (Since all service workers *must* go through the\n // waiting phase, the only way to detect `skipWaiting()` called in the\n // install event is to observe that the time spent in the waiting phase\n // is very short.)\n // NOTE: we don't need separate timeouts for the own and external SWs\n // since they can't go through these phases at the same time.\n this._waitingTimeout = setTimeout(() => {\n // Ensure the SW is still waiting (it may now be redundant).\n if (state === 'installed' && this._registration.waiting === sw) {\n this.dispatchEvent(new WorkboxEvent(\n eventPrefix + 'waiting', eventProps));\n\n if (process.env.NODE_ENV !== 'production') {\n if (isExternal) {\n logger.warn('An external service worker has installed but is ' +\n 'waiting for this client to close before activating...');\n } else {\n logger.warn('The service worker has installed but is waiting ' +\n 'for existing clients to close before activating...');\n }\n }\n }\n }, WAITING_TIMEOUT_DURATION);\n } else if (state === 'activating') {\n clearTimeout(this._waitingTimeout);\n if (!isExternal) {\n this._activeDeferred.resolve(sw);\n }\n }\n\n if (process.env.NODE_ENV !== 'production') {\n switch (state) {\n case 'installed':\n if (isExternal) {\n logger.warn('An external service worker has installed. ' +\n 'You may want to suggest users reload this page.');\n } else {\n logger.log('Registered service worker installed.');\n }\n break;\n case 'activated':\n if (isExternal) {\n logger.warn('An external service worker has activated.');\n } else {\n logger.log('Registered service worker activated.');\n if (sw !== navigator.serviceWorker.controller) {\n logger.warn('The registered service worker is active but ' +\n 'not yet controlling the page. Reload or run ' +\n '`clients.claim()` in the service worker.');\n }\n }\n break;\n case 'redundant':\n if (sw === this._compatibleControllingSW) {\n logger.log('Previously controlling service worker now redundant!');\n } else if (!isExternal) {\n logger.log('Registered service worker now redundant!');\n }\n break;\n }\n }\n }\n\n /**\n * @private\n * @param {Event} originalEvent\n */\n _onControllerChange(originalEvent) {\n const sw = this._sw;\n if (sw === navigator.serviceWorker.controller) {\n this.dispatchEvent(new WorkboxEvent('controlling', {sw, originalEvent}));\n if (process.env.NODE_ENV !== 'production') {\n logger.log('Registered service worker now controlling this page.');\n }\n this._controllingDeferred.resolve(sw);\n }\n }\n\n /**\n * @private\n * @param {Event} originalEvent\n */\n _onMessage(originalEvent) {\n const {data} = originalEvent;\n this.dispatchEvent(new WorkboxEvent('message', {data, originalEvent}));\n }\n}\n\n// The jsdoc comments below outline the events this instance may dispatch:\n// -----------------------------------------------------------------------\n\n/**\n * The `message` event is dispatched any time a `postMessage` (or a\n * `BroadcastChannel` message with the `workbox` channel name) is received.\n *\n * @event module:workbox-window.Workbox#message\n * @type {WorkboxEvent}\n * @property {*} data The `data` property from the original `message` event.\n * @property {Event} originalEvent The original [`message`]{@link https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent}\n * event.\n * @property {string} type `message`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `installed` event is dispatched if the state of a\n * [`Workbox`]{@link module:workbox-window.Workbox} instance's\n * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}\n * changes to `installed`.\n *\n * Then can happen either the very first time a service worker is installed,\n * or after an update to the current service worker is found. In the case\n * of an update being found, the event's `isUpdate` property will be `true`.\n *\n * @event module:workbox-window.Workbox#installed\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {boolean|undefined} isUpdate True if a service worker was already\n * controlling when this `Workbox` instance called `register()`.\n * @property {string} type `installed`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `waiting` event is dispatched if the state of a\n * [`Workbox`]{@link module:workbox-window.Workbox} instance's\n * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}\n * changes to `installed` and then doesn't immediately change to `activating`.\n * It may also be dispatched if a service worker with the same\n * [`scriptURL`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/scriptURL}\n * was already waiting when the [`register()`]{@link module:workbox-window.Workbox#register}\n * method was called.\n *\n * @event module:workbox-window.Workbox#waiting\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The native `controllerchange` event\n * @property {boolean|undefined} isUpdate True if a service worker was already\n * controlling when this `Workbox` instance called `register()`.\n * @property {boolean|undefined} wasWaitingBeforeRegister True if a service worker with\n * a matching `scriptURL` was already waiting when this `Workbox`\n * instance called `register()`.\n * @property {string} type `waiting`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `controlling` event is dispatched if a\n * [`controllerchange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/oncontrollerchange}\n * fires on the service worker [container]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer}\n * and the [`scriptURL`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/scriptURL}\n * of the new [controller]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/controller}\n * matches the `scriptURL` of the `Workbox` instance's\n * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}.\n *\n * @event module:workbox-window.Workbox#controlling\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`controllerchange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/oncontrollerchange}\n * event.\n * @property {boolean|undefined} isUpdate True if a service worker was already\n * controlling when this service worker was registered.\n * @property {string} type `controlling`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `activated` event is dispatched if the state of a\n * [`Workbox`]{@link module:workbox-window.Workbox} instance's\n * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}\n * changes to `activated`.\n *\n * @event module:workbox-window.Workbox#activated\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {boolean|undefined} isUpdate True if a service worker was already\n * controlling when this `Workbox` instance called `register()`.\n * @property {string} type `activated`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `redundant` event is dispatched if the state of a\n * [`Workbox`]{@link module:workbox-window.Workbox} instance's\n * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}\n * changes to `redundant`.\n *\n * @event module:workbox-window.Workbox#redundant\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {boolean|undefined} isUpdate True if a service worker was already\n * controlling when this `Workbox` instance called `register()`.\n * @property {string} type `redundant`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `externalinstalled` event is dispatched if the state of an\n * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-external-sw}\n * changes to `installed`.\n *\n * @event module:workbox-window.Workbox#externalinstalled\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {string} type `externalinstalled`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `externalwaiting` event is dispatched if the state of an\n * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-external-sw}\n * changes to `waiting`.\n *\n * @event module:workbox-window.Workbox#externalwaiting\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event|undefined} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {string} type `externalwaiting`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\n/**\n * The `externalactivated` event is dispatched if the state of an\n * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-external-sw}\n * changes to `activated`.\n *\n * @event module:workbox-window.Workbox#externalactivated\n * @type {WorkboxEvent}\n * @property {ServiceWorker} sw The service worker instance.\n * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}\n * event.\n * @property {string} type `externalactivated`.\n * @property {Workbox} target The `Workbox` instance.\n */\n\nexport {Workbox};\n","/*\n Copyright 2019 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE 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