752 lines
24 KiB
JavaScript
752 lines
24 KiB
JavaScript
try {
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self['workbox:window:4.3.1'] && _();
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} catch (e) {} // eslint-disable-line
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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/**
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* Sends a data object to a service worker via `postMessage` and resolves with
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* a response (if any).
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*
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* A response can be set in a message handler in the service worker by
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* calling `event.ports[0].postMessage(...)`, which will resolve the promise
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* returned by `messageSW()`. If no response is set, the promise will not
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* resolve.
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*
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* @param {ServiceWorker} sw The service worker to send the message to.
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* @param {Object} data An object to send to the service worker.
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* @return {Promise<Object|undefined>}
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*
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* @memberof module:workbox-window
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*/
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const messageSW = (sw, data) => {
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return new Promise(resolve => {
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let messageChannel = new MessageChannel();
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messageChannel.port1.onmessage = evt => resolve(evt.data);
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sw.postMessage(data, [messageChannel.port2]);
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});
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};
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try {
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self['workbox:core:4.3.1'] && _();
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} catch (e) {} // eslint-disable-line
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/*
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Copyright 2018 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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/**
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* The Deferred class composes Promises in a way that allows for them to be
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* resolved or rejected from outside the constructor. In most cases promises
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* should be used directly, but Deferreds can be necessary when the logic to
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* resolve a promise must be separate.
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*
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* @private
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*/
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class Deferred {
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/**
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* Creates a promise and exposes its resolve and reject functions as methods.
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*/
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constructor() {
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this.promise = new Promise((resolve, reject) => {
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this.resolve = resolve;
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this.reject = reject;
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});
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}
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}
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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const logger = (() => {
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let inGroup = false;
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const methodToColorMap = {
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debug: `#7f8c8d`,
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// Gray
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log: `#2ecc71`,
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// Green
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warn: `#f39c12`,
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// Yellow
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error: `#c0392b`,
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// Red
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groupCollapsed: `#3498db`,
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// Blue
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groupEnd: null // No colored prefix on groupEnd
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};
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const print = function (method, args) {
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if (method === 'groupCollapsed') {
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// Safari doesn't print all console.groupCollapsed() arguments:
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// https://bugs.webkit.org/show_bug.cgi?id=182754
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if (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {
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console[method](...args);
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return;
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}
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}
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const styles = [`background: ${methodToColorMap[method]}`, `border-radius: 0.5em`, `color: white`, `font-weight: bold`, `padding: 2px 0.5em`]; // When in a group, the workbox prefix is not displayed.
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const logPrefix = inGroup ? [] : ['%cworkbox', styles.join(';')];
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console[method](...logPrefix, ...args);
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if (method === 'groupCollapsed') {
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inGroup = true;
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}
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if (method === 'groupEnd') {
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inGroup = false;
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}
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};
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const api = {};
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for (const method of Object.keys(methodToColorMap)) {
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api[method] = (...args) => {
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print(method, args);
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};
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}
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return api;
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})();
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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/**
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* A minimal `EventTarget` shim.
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* This is necessary because not all browsers support constructable
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* `EventTarget`, so using a real `EventTarget` will error.
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* @private
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*/
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class EventTargetShim {
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/**
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* Creates an event listener registry
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*
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* @private
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*/
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constructor() {
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// A registry of event types to listeners.
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this._eventListenerRegistry = {};
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}
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/**
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* @param {string} type
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* @param {Function} listener
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* @private
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*/
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addEventListener(type, listener) {
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this._getEventListenersByType(type).add(listener);
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}
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/**
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* @param {string} type
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* @param {Function} listener
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* @private
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*/
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removeEventListener(type, listener) {
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this._getEventListenersByType(type).delete(listener);
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}
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/**
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* @param {Event} event
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* @private
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*/
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dispatchEvent(event) {
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event.target = this;
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this._getEventListenersByType(event.type).forEach(listener => listener(event));
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}
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/**
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* Returns a Set of listeners associated with the passed event type.
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* If no handlers have been registered, an empty Set is returned.
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*
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* @param {string} type The event type.
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* @return {Set} An array of handler functions.
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* @private
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*/
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_getEventListenersByType(type) {
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return this._eventListenerRegistry[type] = this._eventListenerRegistry[type] || new Set();
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}
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}
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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/**
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* Returns true if two URLs have the same `.href` property. The URLS can be
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* relative, and if they are the current location href is used to resolve URLs.
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*
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* @private
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* @param {string} url1
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* @param {string} url2
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* @return {boolean}
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*/
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const urlsMatch = (url1, url2) => {
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return new URL(url1, location).href === new URL(url2, location).href;
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};
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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/**
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* A minimal `Event` subclass shim.
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* This doesn't *actually* subclass `Event` because not all browsers support
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* constructable `EventTarget`, and using a real `Event` will error.
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* @private
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*/
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class WorkboxEvent {
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/**
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* @param {string} type
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* @param {Object} props
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*/
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constructor(type, props) {
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Object.assign(this, props, {
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type
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});
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}
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}
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/*
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Copyright 2019 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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// `skipWaiting()` wasn't called. This 200 amount wasn't scientifically
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// chosen, but it seems to avoid false positives in my testing.
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const WAITING_TIMEOUT_DURATION = 200; // The amount of time after a registration that we can reasonably conclude
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// that the registration didn't trigger an update.
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const REGISTRATION_TIMEOUT_DURATION = 60000;
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/**
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* A class to aid in handling service worker registration, updates, and
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* reacting to service worker lifecycle events.
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*
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* @fires [message]{@link module:workbox-window.Workbox#message}
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* @fires [installed]{@link module:workbox-window.Workbox#installed}
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* @fires [waiting]{@link module:workbox-window.Workbox#waiting}
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* @fires [controlling]{@link module:workbox-window.Workbox#controlling}
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* @fires [activated]{@link module:workbox-window.Workbox#activated}
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* @fires [redundant]{@link module:workbox-window.Workbox#redundant}
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* @fires [externalinstalled]{@link module:workbox-window.Workbox#externalinstalled}
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* @fires [externalwaiting]{@link module:workbox-window.Workbox#externalwaiting}
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* @fires [externalactivated]{@link module:workbox-window.Workbox#externalactivated}
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*
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* @memberof module:workbox-window
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*/
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class Workbox extends EventTargetShim {
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/**
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* Creates a new Workbox instance with a script URL and service worker
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* options. The script URL and options are the same as those used when
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* calling `navigator.serviceWorker.register(scriptURL, options)`. See:
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* https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/register
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*
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* @param {string} scriptURL The service worker script associated with this
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* instance.
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* @param {Object} [registerOptions] The service worker options associated
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* with this instance.
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*/
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constructor(scriptURL, registerOptions = {}) {
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super();
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this._scriptURL = scriptURL;
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this._registerOptions = registerOptions;
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this._updateFoundCount = 0; // Deferreds we can resolve later.
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this._swDeferred = new Deferred();
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this._activeDeferred = new Deferred();
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this._controllingDeferred = new Deferred(); // Bind event handler callbacks.
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this._onMessage = this._onMessage.bind(this);
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this._onStateChange = this._onStateChange.bind(this);
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this._onUpdateFound = this._onUpdateFound.bind(this);
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this._onControllerChange = this._onControllerChange.bind(this);
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}
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/**
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* Registers a service worker for this instances script URL and service
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* worker options. By default this method delays registration until after
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* the window has loaded.
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*
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* @param {Object} [options]
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* @param {Function} [options.immediate=false] Setting this to true will
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* register the service worker immediately, even if the window has
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* not loaded (not recommended).
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*/
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async register({
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immediate = false
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} = {}) {
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{
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if (this._registrationTime) {
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logger.error('Cannot re-register a Workbox instance after it has ' + 'been registered. Create a new instance instead.');
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return;
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}
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}
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if (!immediate && document.readyState !== 'complete') {
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await new Promise(res => addEventListener('load', res));
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} // Set this flag to true if any service worker was controlling the page
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// at registration time.
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this._isUpdate = Boolean(navigator.serviceWorker.controller); // Before registering, attempt to determine if a SW is already controlling
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// the page, and if that SW script (and version, if specified) matches this
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// instance's script.
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this._compatibleControllingSW = this._getControllingSWIfCompatible();
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this._registration = await this._registerScript(); // If we have a compatible controller, store the controller as the "own"
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// SW, resolve active/controlling deferreds and add necessary listeners.
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if (this._compatibleControllingSW) {
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this._sw = this._compatibleControllingSW;
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this._activeDeferred.resolve(this._compatibleControllingSW);
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this._controllingDeferred.resolve(this._compatibleControllingSW);
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this._reportWindowReady(this._compatibleControllingSW);
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this._compatibleControllingSW.addEventListener('statechange', this._onStateChange, {
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once: true
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});
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} // If there's a waiting service worker with a matching URL before the
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// `updatefound` event fires, it likely means that this site is open
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// in another tab, or the user refreshed the page (and thus the prevoius
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// page wasn't fully unloaded before this page started loading).
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// https://developers.google.com/web/fundamentals/primers/service-workers/lifecycle#waiting
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const waitingSW = this._registration.waiting;
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if (waitingSW && urlsMatch(waitingSW.scriptURL, this._scriptURL)) {
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// Store the waiting SW as the "own" Sw, even if it means overwriting
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// a compatible controller.
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this._sw = waitingSW; // Run this in the next microtask, so any code that adds an event
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// listener after awaiting `register()` will get this event.
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Promise.resolve().then(() => {
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this.dispatchEvent(new WorkboxEvent('waiting', {
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sw: waitingSW,
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wasWaitingBeforeRegister: true
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}));
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{
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logger.warn('A service worker was already waiting to activate ' + 'before this script was registered...');
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}
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});
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} // If an "own" SW is already set, resolve the deferred.
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if (this._sw) {
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this._swDeferred.resolve(this._sw);
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}
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{
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logger.log('Successfully registered service worker.', this._scriptURL);
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if (navigator.serviceWorker.controller) {
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if (this._compatibleControllingSW) {
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logger.debug('A service worker with the same script URL ' + 'is already controlling this page.');
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} else {
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logger.debug('A service worker with a different script URL is ' + 'currently controlling the page. The browser is now fetching ' + 'the new script now...');
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}
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}
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const currentPageIsOutOfScope = () => {
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const scopeURL = new URL(this._registerOptions.scope || this._scriptURL, document.baseURI);
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const scopeURLBasePath = new URL('./', scopeURL.href).pathname;
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return !location.pathname.startsWith(scopeURLBasePath);
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};
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if (currentPageIsOutOfScope()) {
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logger.warn('The current page is not in scope for the registered ' + 'service worker. Was this a mistake?');
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}
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}
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this._registration.addEventListener('updatefound', this._onUpdateFound);
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navigator.serviceWorker.addEventListener('controllerchange', this._onControllerChange, {
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once: true
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}); // Add message listeners.
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if ('BroadcastChannel' in self) {
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this._broadcastChannel = new BroadcastChannel('workbox');
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this._broadcastChannel.addEventListener('message', this._onMessage);
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}
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navigator.serviceWorker.addEventListener('message', this._onMessage);
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return this._registration;
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}
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/**
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* Resolves to the service worker registered by this instance as soon as it
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* is active. If a service worker was already controlling at registration
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* time then it will resolve to that if the script URLs (and optionally
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* script versions) match, otherwise it will wait until an update is found
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* and activates.
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*
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* @return {Promise<ServiceWorker>}
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*/
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get active() {
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return this._activeDeferred.promise;
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}
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/**
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* Resolves to the service worker registered by this instance as soon as it
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* is controlling the page. If a service worker was already controlling at
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* registration time then it will resolve to that if the script URLs (and
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* optionally script versions) match, otherwise it will wait until an update
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* is found and starts controlling the page.
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* Note: the first time a service worker is installed it will active but
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* not start controlling the page unless `clients.claim()` is called in the
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* service worker.
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*
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* @return {Promise<ServiceWorker>}
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*/
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get controlling() {
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return this._controllingDeferred.promise;
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}
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/**
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* Resolves with a reference to a service worker that matches the script URL
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* of this instance, as soon as it's available.
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*
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* If, at registration time, there's already an active or waiting service
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* worker with a matching script URL, it will be used (with the waiting
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* service worker taking precedence over the active service worker if both
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* match, since the waiting service worker would have been registered more
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* recently).
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* If there's no matching active or waiting service worker at registration
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* time then the promise will not resolve until an update is found and starts
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* installing, at which point the installing service worker is used.
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*
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* @return {Promise<ServiceWorker>}
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*/
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async getSW() {
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// If `this._sw` is set, resolve with that as we want `getSW()` to
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// return the correct (new) service worker if an update is found.
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return this._sw || this._swDeferred.promise;
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}
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/**
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* Sends the passed data object to the service worker registered by this
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* instance (via [`getSW()`]{@link module:workbox-window.Workbox#getSW}) and resolves
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* with a response (if any).
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*
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* A response can be set in a message handler in the service worker by
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* calling `event.ports[0].postMessage(...)`, which will resolve the promise
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* returned by `messageSW()`. If no response is set, the promise will never
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* resolve.
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*
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* @param {Object} data An object to send to the service worker
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* @return {Promise<Object>}
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*/
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async messageSW(data) {
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const sw = await this.getSW();
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return messageSW(sw, data);
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}
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/**
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* Checks for a service worker already controlling the page and returns
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* it if its script URL matchs.
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*
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* @private
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* @return {ServiceWorker|undefined}
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*/
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_getControllingSWIfCompatible() {
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const controller = navigator.serviceWorker.controller;
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if (controller && urlsMatch(controller.scriptURL, this._scriptURL)) {
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return controller;
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}
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}
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/**
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* Registers a service worker for this instances script URL and register
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* options and tracks the time registration was complete.
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*
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* @private
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*/
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async _registerScript() {
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try {
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const reg = await navigator.serviceWorker.register(this._scriptURL, this._registerOptions); // Keep track of when registration happened, so it can be used in the
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// `this._onUpdateFound` heuristic. Also use the presence of this
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// property as a way to see if `.register()` has been called.
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this._registrationTime = performance.now();
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return reg;
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} catch (error) {
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{
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logger.error(error);
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} // Re-throw the error.
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throw error;
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}
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}
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/**
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* Sends a message to the passed service worker that the window is ready.
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*
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* @param {ServiceWorker} sw
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* @private
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*/
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_reportWindowReady(sw) {
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messageSW(sw, {
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type: 'WINDOW_READY',
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meta: 'workbox-window'
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});
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}
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/**
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* @private
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*/
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|
|
|
_onUpdateFound() {
|
|
const installingSW = this._registration.installing; // If the script URL passed to `navigator.serviceWorker.register()` is
|
|
// different from the current controlling SW's script URL, we know any
|
|
// successful registration calls will trigger an `updatefound` event.
|
|
// But if the registered script URL is the same as the current controlling
|
|
// SW's script URL, we'll only get an `updatefound` event if the file
|
|
// changed since it was last registered. This can be a problem if the user
|
|
// opens up the same page in a different tab, and that page registers
|
|
// a SW that triggers an update. It's a problem because this page has no
|
|
// good way of knowing whether the `updatefound` event came from the SW
|
|
// script it registered or from a registration attempt made by a newer
|
|
// version of the page running in another tab.
|
|
// To minimize the possibility of a false positive, we use the logic here:
|
|
|
|
let updateLikelyTriggeredExternally = // Since we enforce only calling `register()` once, and since we don't
|
|
// add the `updatefound` event listener until the `register()` call, if
|
|
// `_updateFoundCount` is > 0 then it means this method has already
|
|
// been called, thus this SW must be external
|
|
this._updateFoundCount > 0 || // If the script URL of the installing SW is different from this
|
|
// instance's script URL, we know it's definitely not from our
|
|
// registration.
|
|
!urlsMatch(installingSW.scriptURL, this._scriptURL) || // If all of the above are false, then we use a time-based heuristic:
|
|
// Any `updatefound` event that occurs long after our registration is
|
|
// assumed to be external.
|
|
performance.now() > this._registrationTime + REGISTRATION_TIMEOUT_DURATION ? // If any of the above are not true, we assume the update was
|
|
// triggered by this instance.
|
|
true : false;
|
|
|
|
if (updateLikelyTriggeredExternally) {
|
|
this._externalSW = installingSW;
|
|
|
|
this._registration.removeEventListener('updatefound', this._onUpdateFound);
|
|
} else {
|
|
// If the update was not triggered externally we know the installing
|
|
// SW is the one we registered, so we set it.
|
|
this._sw = installingSW;
|
|
|
|
this._swDeferred.resolve(installingSW); // The `installing` state isn't something we have a dedicated
|
|
// callback for, but we do log messages for it in development.
|
|
|
|
|
|
{
|
|
if (navigator.serviceWorker.controller) {
|
|
logger.log('Updated service worker found. Installing now...');
|
|
} else {
|
|
logger.log('Service worker is installing...');
|
|
}
|
|
}
|
|
} // Increment the `updatefound` count, so future invocations of this
|
|
// method can be sure they were triggered externally.
|
|
|
|
|
|
++this._updateFoundCount; // Add a `statechange` listener regardless of whether this update was
|
|
// triggered externally, since we have callbacks for both.
|
|
|
|
installingSW.addEventListener('statechange', this._onStateChange);
|
|
}
|
|
/**
|
|
* @private
|
|
* @param {Event} originalEvent
|
|
*/
|
|
|
|
|
|
_onStateChange(originalEvent) {
|
|
const sw = originalEvent.target;
|
|
const {
|
|
state
|
|
} = sw;
|
|
const isExternal = sw === this._externalSW;
|
|
const eventPrefix = isExternal ? 'external' : '';
|
|
const eventProps = {
|
|
sw,
|
|
originalEvent
|
|
};
|
|
|
|
if (!isExternal && this._isUpdate) {
|
|
eventProps.isUpdate = true;
|
|
}
|
|
|
|
this.dispatchEvent(new WorkboxEvent(eventPrefix + state, eventProps));
|
|
|
|
if (state === 'installed') {
|
|
// This timeout is used to ignore cases where the service worker calls
|
|
// `skipWaiting()` in the install event, thus moving it directly in the
|
|
// activating state. (Since all service workers *must* go through the
|
|
// waiting phase, the only way to detect `skipWaiting()` called in the
|
|
// install event is to observe that the time spent in the waiting phase
|
|
// is very short.)
|
|
// NOTE: we don't need separate timeouts for the own and external SWs
|
|
// since they can't go through these phases at the same time.
|
|
this._waitingTimeout = setTimeout(() => {
|
|
// Ensure the SW is still waiting (it may now be redundant).
|
|
if (state === 'installed' && this._registration.waiting === sw) {
|
|
this.dispatchEvent(new WorkboxEvent(eventPrefix + 'waiting', eventProps));
|
|
|
|
{
|
|
if (isExternal) {
|
|
logger.warn('An external service worker has installed but is ' + 'waiting for this client to close before activating...');
|
|
} else {
|
|
logger.warn('The service worker has installed but is waiting ' + 'for existing clients to close before activating...');
|
|
}
|
|
}
|
|
}
|
|
}, WAITING_TIMEOUT_DURATION);
|
|
} else if (state === 'activating') {
|
|
clearTimeout(this._waitingTimeout);
|
|
|
|
if (!isExternal) {
|
|
this._activeDeferred.resolve(sw);
|
|
}
|
|
}
|
|
|
|
{
|
|
switch (state) {
|
|
case 'installed':
|
|
if (isExternal) {
|
|
logger.warn('An external service worker has installed. ' + 'You may want to suggest users reload this page.');
|
|
} else {
|
|
logger.log('Registered service worker installed.');
|
|
}
|
|
|
|
break;
|
|
|
|
case 'activated':
|
|
if (isExternal) {
|
|
logger.warn('An external service worker has activated.');
|
|
} else {
|
|
logger.log('Registered service worker activated.');
|
|
|
|
if (sw !== navigator.serviceWorker.controller) {
|
|
logger.warn('The registered service worker is active but ' + 'not yet controlling the page. Reload or run ' + '`clients.claim()` in the service worker.');
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case 'redundant':
|
|
if (sw === this._compatibleControllingSW) {
|
|
logger.log('Previously controlling service worker now redundant!');
|
|
} else if (!isExternal) {
|
|
logger.log('Registered service worker now redundant!');
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* @private
|
|
* @param {Event} originalEvent
|
|
*/
|
|
|
|
|
|
_onControllerChange(originalEvent) {
|
|
const sw = this._sw;
|
|
|
|
if (sw === navigator.serviceWorker.controller) {
|
|
this.dispatchEvent(new WorkboxEvent('controlling', {
|
|
sw,
|
|
originalEvent
|
|
}));
|
|
|
|
{
|
|
logger.log('Registered service worker now controlling this page.');
|
|
}
|
|
|
|
this._controllingDeferred.resolve(sw);
|
|
}
|
|
}
|
|
/**
|
|
* @private
|
|
* @param {Event} originalEvent
|
|
*/
|
|
|
|
|
|
_onMessage(originalEvent) {
|
|
const {
|
|
data
|
|
} = originalEvent;
|
|
this.dispatchEvent(new WorkboxEvent('message', {
|
|
data,
|
|
originalEvent
|
|
}));
|
|
}
|
|
|
|
} // The jsdoc comments below outline the events this instance may dispatch:
|
|
|
|
/*
|
|
Copyright 2019 Google LLC
|
|
|
|
Use of this source code is governed by an MIT-style
|
|
license that can be found in the LICENSE file or at
|
|
https://opensource.org/licenses/MIT.
|
|
*/
|
|
|
|
export { Workbox, messageSW };
|
|
//# sourceMappingURL=workbox-window.dev.mjs.map
|