update sw.js

_config.amane.yml

@@ -197,7 +197,7 @@ widgets:
         # Author's current location
         # location: CLOUDFLARE.COM
         # URL or path to the avatar image
-        avatar: https://cdn.nofated.win/avatar/256
+        avatar: https://xgjalbum.oss-cn-hangzhou.aliyuncs.com/623fec2f97df7d3eee768933/AC1BFF0F-E891-41D0-8BB7-08C4DDB70CA9.png?x-oss-process=image/resize,m_fill,h_256,w_256,limit_0/format,webp
         # Whether show the rounded avatar image
         avatar_rounded: true
         # Email address for the Gravatar

scripts/service-worker-injector.js

@@ -1 +1,3 @@
-hexo.extend.injector.register('body_end', '<script>if("serviceWorker"in navigator){window.addEventListener("load",function(){navigator.serviceWorker.register("/js/sw.js").then(function(registration){console.log("ServiceWorker registration successful with scope: ",registration.scope)}).catch(function(err){console.log("ServiceWorker registration failed: ",err)})})}</script>', 'default');
+hexo.extend.injector.register('body_end', '<script>window.addEventListener("load",()=>{const e="1699180247";"serviceWorker"in navigator&&localStorage.getItem("sw.js-version")!=e?(navigator.serviceWorker.register("/js/sw.js",{scope:"/"}).then(function(t){console.log("ServiceWorker registration successful with scope: ",t.scope),localStorage.setItem("sw.js-version",e)}).catch(function(e){console.warn("ServiceWorker registration failed: ",e)}),navigator.serviceWorker.addEventListener("controllerchange",function(){var e=document.querySelector("title");e.innerText="Need update Service Worker - "+e.innerText})):console.log("ServiceWorker already the latest version."),quicklink.listen()})</script>', 'default');
+
+hexo.extend.injector.register('body_end', '<script src="/js/quicklink.js"></script>', 'default');

source/js/quicklink.js

@@ -0,0 +1 @@
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n(e.quicklink={})}(this,function(e){function n(e){return new Promise(function(n,r,t){(t=new XMLHttpRequest).open("GET",e,t.withCredentials=!0),t.onload=function(){200===t.status?n():r()},t.send()})}var r,t=(r=document.createElement("link")).relList&&r.relList.supports&&r.relList.supports("prefetch")?function(e){return new Promise(function(n,r,t){(t=document.createElement("link")).rel="prefetch",t.href=e,t.onload=n,t.onerror=r,document.head.appendChild(t)})}:n,o=window.requestIdleCallback||function(e){var n=Date.now();return setTimeout(function(){e({didTimeout:!1,timeRemaining:function(){return Math.max(0,50-(Date.now()-n))}})},1)},i=new Set,c=new Set,u=!1;function a(e){if(e){if(e.saveData)return new Error("Save-Data is enabled");if(/2g/.test(e.effectiveType))return new Error("network conditions are poor")}return!0}function s(e,r,o){var s=a(navigator.connection);return s instanceof Error?Promise.reject(new Error("Cannot prefetch, "+s.message)):(c.size>0&&!u&&console.warn("[Warning] You are using both prefetching and prerendering on the same document"),Promise.all([].concat(e).map(function(e){if(!i.has(e))return i.add(e),(r?function(e){return window.fetch?fetch(e,{credentials:"include"}):n(e)}:t)(new URL(e,location.href).toString())})))}function f(e,n){var r=a(navigator.connection);if(r instanceof Error)return Promise.reject(new Error("Cannot prerender, "+r.message));if(!HTMLScriptElement.supports("speculationrules"))return s(e),Promise.reject(new Error("This browser does not support the speculation rules API. Falling back to prefetch."));if(document.querySelector('script[type="speculationrules"]'))return Promise.reject(new Error("Speculation Rules is already defined and cannot be altered."));for(var t=0,o=[].concat(e);t<o.length;t+=1){var f=o[t];if(window.location.origin!==new URL(f,window.location.href).origin)return Promise.reject(new Error("Only same origin URLs are allowed: "+f));c.add(f)}i.size>0&&!u&&console.warn("[Warning] You are using both prefetching and prerendering on the same document");var l=function(e){var n=document.createElement("script");n.type="speculationrules",n.text='{"prerender":[{"source": "list","urls": ["'+Array.from(e).join('","')+'"]}]}';try{document.head.appendChild(n)}catch(e){return e}return!0}(c);return!0===l?Promise.resolve():Promise.reject(l)}e.listen=function(e){if(e||(e={}),window.IntersectionObserver){var n=function(e){e=e||1;var n=[],r=0;function t(){r<e&&n.length>0&&(n.shift()(),r++)}return[function(e){n.push(e)>1||t()},function(){r--,t()}]}(e.throttle||1/0),r=n[0],t=n[1],a=e.limit||1/0,l=e.origins||[location.hostname],d=e.ignores||[],h=e.delay||0,p=[],m=e.timeoutFn||o,w="function"==typeof e.hrefFn&&e.hrefFn,g=e.prerender||!1;u=e.prerenderAndPrefetch||!1;var v=new IntersectionObserver(function(n){n.forEach(function(n){if(n.isIntersecting)p.push((n=n.target).href),function(e,n){n?setTimeout(e,n):e()}(function(){-1!==p.indexOf(n.href)&&(v.unobserve(n),(u||g)&&c.size<1?f(w?w(n):n.href).catch(function(n){if(!e.onError)throw n;e.onError(n)}):i.size<a&&!g&&r(function(){s(w?w(n):n.href,e.priority).then(t).catch(function(n){t(),e.onError&&e.onError(n)})}))},h);else{var o=p.indexOf((n=n.target).href);o>-1&&p.splice(o)}})},{threshold:e.threshold||0});return m(function(){(e.el||document).querySelectorAll("a").forEach(function(e){l.length&&!l.includes(e.hostname)||function e(n,r){return Array.isArray(r)?r.some(function(r){return e(n,r)}):(r.test||r).call(r,n.href,n)}(e,d)||v.observe(e)})},{timeout:e.timeout||2e3}),function(){i.clear(),v.disconnect()}}},e.prefetch=s,e.prerender=f});

source/js/sw.js

@@ -1,7 +1,7 @@
-importScripts('https://cdn.jsdelivr.net/npm/workbox-cdn@5.1.4/workbox/workbox-sw.js');
+importScripts('/js/workbox/workbox-sw.js');
 
 workbox.setConfig({
-    modulePathPrefix: 'https://cdn.jsdelivr.net/npm/workbox-cdn@5.1.4/workbox/'
+    modulePathPrefix: '/js/workbox/'
 });
 
 const { core, precaching, routing, strategies, expiration, cacheableResponse, backgroundSync } = workbox;
@@ -9,7 +9,7 @@ const { CacheFirst, NetworkFirst, NetworkOnly, StaleWhileRevalidate } = strategi
 const { ExpirationPlugin } = expiration;
 const { CacheableResponsePlugin } = cacheableResponse;
 
-const cacheSuffixVersion = '-231126',
+const cacheSuffixVersion = '-231126a',
     // precacheCacheName = core.cacheNames.precache,
     // runtimeCacheName = core.cacheNames.runtime,
     maxEntries = 100;
@@ -18,8 +18,8 @@ self.addEventListener('activate', (event) => {
     event.waitUntil(
         caches.keys().then((keys) => {
             return Promise.all(keys.map((key) => {
-                if (key.includes('disqus-cdn-cache')) return caches.delete(key);
-                if (key.includes('disqus-img-cache')) return caches.delete(key);
+                if (key.includes('waline-cdn-cache')) return caches.delete(key);
+                if (key.includes('waline-img-cache')) return caches.delete(key);
                 if (!key.includes(cacheSuffixVersion)) return caches.delete(key);
             }));
         })
@@ -203,10 +203,10 @@ routing.registerRoute(
 );
 
 routing.registerRoute(
-    new RegExp('disqus'),
+    new RegExp('waline'),
     new NetworkFirst({
         plugins: [
-            new backgroundSync.BackgroundSyncPlugin('disqus', {
+            new backgroundSync.BackgroundSyncPlugin('waline', {
                 maxRetentionTime: 12 * 60
             }),
         ]
@@ -276,4 +276,4 @@ routing.registerRoute(
  */
 routing.setDefaultHandler(
     new NetworkOnly()
-);
+);

source/js/workbox/workbox-background-sync.dev.js

@@ -0,0 +1,818 @@
+this.workbox = this.workbox || {};
+this.workbox.backgroundSync = (function (exports, WorkboxError_js, logger_js, assert_js, getFriendlyURL_js, DBWrapper_js) {
+    'use strict';
+
+    try {
+      self['workbox:background-sync:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    const DB_VERSION = 3;
+    const DB_NAME = 'workbox-background-sync';
+    const OBJECT_STORE_NAME = 'requests';
+    const INDEXED_PROP = 'queueName';
+    /**
+     * A class to manage storing requests from a Queue in IndexedDB,
+     * indexed by their queue name for easier access.
+     *
+     * @private
+     */
+
+    class QueueStore {
+      /**
+       * Associates this instance with a Queue instance, so entries added can be
+       * identified by their queue name.
+       *
+       * @param {string} queueName
+       * @private
+       */
+      constructor(queueName) {
+        this._queueName = queueName;
+        this._db = new DBWrapper_js.DBWrapper(DB_NAME, DB_VERSION, {
+          onupgradeneeded: this._upgradeDb
+        });
+      }
+      /**
+       * Append an entry last in the queue.
+       *
+       * @param {Object} entry
+       * @param {Object} entry.requestData
+       * @param {number} [entry.timestamp]
+       * @param {Object} [entry.metadata]
+       * @private
+       */
+
+
+      async pushEntry(entry) {
+        {
+          assert_js.assert.isType(entry, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'QueueStore',
+            funcName: 'pushEntry',
+            paramName: 'entry'
+          });
+          assert_js.assert.isType(entry.requestData, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'QueueStore',
+            funcName: 'pushEntry',
+            paramName: 'entry.requestData'
+          });
+        } // Don't specify an ID since one is automatically generated.
+
+
+        delete entry.id;
+        entry.queueName = this._queueName;
+        await this._db.add(OBJECT_STORE_NAME, entry);
+      }
+      /**
+       * Prepend an entry first in the queue.
+       *
+       * @param {Object} entry
+       * @param {Object} entry.requestData
+       * @param {number} [entry.timestamp]
+       * @param {Object} [entry.metadata]
+       * @private
+       */
+
+
+      async unshiftEntry(entry) {
+        {
+          assert_js.assert.isType(entry, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'QueueStore',
+            funcName: 'unshiftEntry',
+            paramName: 'entry'
+          });
+          assert_js.assert.isType(entry.requestData, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'QueueStore',
+            funcName: 'unshiftEntry',
+            paramName: 'entry.requestData'
+          });
+        }
+
+        const [firstEntry] = await this._db.getAllMatching(OBJECT_STORE_NAME, {
+          count: 1
+        });
+
+        if (firstEntry) {
+          // Pick an ID one less than the lowest ID in the object store.
+          entry.id = firstEntry.id - 1;
+        } else {
+          // Otherwise let the auto-incrementor assign the ID.
+          delete entry.id;
+        }
+
+        entry.queueName = this._queueName;
+        await this._db.add(OBJECT_STORE_NAME, entry);
+      }
+      /**
+       * Removes and returns the last entry in the queue matching the `queueName`.
+       *
+       * @return {Promise<Object>}
+       * @private
+       */
+
+
+      async popEntry() {
+        return this._removeEntry({
+          direction: 'prev'
+        });
+      }
+      /**
+       * Removes and returns the first entry in the queue matching the `queueName`.
+       *
+       * @return {Promise<Object>}
+       * @private
+       */
+
+
+      async shiftEntry() {
+        return this._removeEntry({
+          direction: 'next'
+        });
+      }
+      /**
+       * Returns all entries in the store matching the `queueName`.
+       *
+       * @param {Object} options See {@link module:workbox-background-sync.Queue~getAll}
+       * @return {Promise<Array<Object>>}
+       * @private
+       */
+
+
+      async getAll() {
+        return await this._db.getAllMatching(OBJECT_STORE_NAME, {
+          index: INDEXED_PROP,
+          query: IDBKeyRange.only(this._queueName)
+        });
+      }
+      /**
+       * Deletes the entry for the given ID.
+       *
+       * WARNING: this method does not ensure the deleted enry belongs to this
+       * queue (i.e. matches the `queueName`). But this limitation is acceptable
+       * as this class is not publicly exposed. An additional check would make
+       * this method slower than it needs to be.
+       *
+       * @private
+       * @param {number} id
+       */
+
+
+      async deleteEntry(id) {
+        await this._db.delete(OBJECT_STORE_NAME, id);
+      }
+      /**
+       * Removes and returns the first or last entry in the queue (based on the
+       * `direction` argument) matching the `queueName`.
+       *
+       * @return {Promise<Object>}
+       * @private
+       */
+
+
+      async _removeEntry({
+        direction
+      }) {
+        const [entry] = await this._db.getAllMatching(OBJECT_STORE_NAME, {
+          direction,
+          index: INDEXED_PROP,
+          query: IDBKeyRange.only(this._queueName),
+          count: 1
+        });
+
+        if (entry) {
+          await this.deleteEntry(entry.id);
+          return entry;
+        }
+      }
+      /**
+       * Upgrades the database given an `upgradeneeded` event.
+       *
+       * @param {Event} event
+       * @private
+       */
+
+
+      _upgradeDb(event) {
+        const db = event.target.result;
+
+        if (event.oldVersion > 0 && event.oldVersion < DB_VERSION) {
+          if (db.objectStoreNames.contains(OBJECT_STORE_NAME)) {
+            db.deleteObjectStore(OBJECT_STORE_NAME);
+          }
+        }
+
+        const objStore = db.createObjectStore(OBJECT_STORE_NAME, {
+          autoIncrement: true,
+          keyPath: 'id'
+        });
+        objStore.createIndex(INDEXED_PROP, INDEXED_PROP, {
+          unique: false
+        });
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    const serializableProperties = ['method', 'referrer', 'referrerPolicy', 'mode', 'credentials', 'cache', 'redirect', 'integrity', 'keepalive'];
+    /**
+     * A class to make it easier to serialize and de-serialize requests so they
+     * can be stored in IndexedDB.
+     *
+     * @private
+     */
+
+    class StorableRequest {
+      /**
+       * Accepts an object of request data that can be used to construct a
+       * `Request` but can also be stored in IndexedDB.
+       *
+       * @param {Object} requestData An object of request data that includes the
+       *     `url` plus any relevant properties of
+       *     [requestInit]{@link https://fetch.spec.whatwg.org/#requestinit}.
+       * @private
+       */
+      constructor(requestData) {
+        {
+          assert_js.assert.isType(requestData, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'StorableRequest',
+            funcName: 'constructor',
+            paramName: 'requestData'
+          });
+          assert_js.assert.isType(requestData.url, 'string', {
+            moduleName: 'workbox-background-sync',
+            className: 'StorableRequest',
+            funcName: 'constructor',
+            paramName: 'requestData.url'
+          });
+        } // If the request's mode is `navigate`, convert it to `same-origin` since
+        // navigation requests can't be constructed via script.
+
+
+        if (requestData['mode'] === 'navigate') {
+          requestData['mode'] = 'same-origin';
+        }
+
+        this._requestData = requestData;
+      }
+      /**
+       * Converts a Request object to a plain object that can be structured
+       * cloned or JSON-stringified.
+       *
+       * @param {Request} request
+       * @return {Promise<StorableRequest>}
+       *
+       * @private
+       */
+
+
+      static async fromRequest(request) {
+        const requestData = {
+          url: request.url,
+          headers: {}
+        }; // Set the body if present.
+
+        if (request.method !== 'GET') {
+          // Use ArrayBuffer to support non-text request bodies.
+          // NOTE: we can't use Blobs becuse Safari doesn't support storing
+          // Blobs in IndexedDB in some cases:
+          // https://github.com/dfahlander/Dexie.js/issues/618#issuecomment-398348457
+          requestData.body = await request.clone().arrayBuffer();
+        } // Convert the headers from an iterable to an object.
+
+
+        for (const [key, value] of request.headers.entries()) {
+          requestData.headers[key] = value;
+        } // Add all other serializable request properties
+
+
+        for (const prop of serializableProperties) {
+          if (request[prop] !== undefined) {
+            requestData[prop] = request[prop];
+          }
+        }
+
+        return new StorableRequest(requestData);
+      }
+      /**
+       * Returns a deep clone of the instances `_requestData` object.
+       *
+       * @return {Object}
+       *
+       * @private
+       */
+
+
+      toObject() {
+        const requestData = Object.assign({}, this._requestData);
+        requestData.headers = Object.assign({}, this._requestData.headers);
+
+        if (requestData.body) {
+          requestData.body = requestData.body.slice(0);
+        }
+
+        return requestData;
+      }
+      /**
+       * Converts this instance to a Request.
+       *
+       * @return {Request}
+       *
+       * @private
+       */
+
+
+      toRequest() {
+        return new Request(this._requestData.url, this._requestData);
+      }
+      /**
+       * Creates and returns a deep clone of the instance.
+       *
+       * @return {StorableRequest}
+       *
+       * @private
+       */
+
+
+      clone() {
+        return new StorableRequest(this.toObject());
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    const TAG_PREFIX = 'workbox-background-sync';
+    const MAX_RETENTION_TIME = 60 * 24 * 7; // 7 days in minutes
+
+    const queueNames = new Set();
+    /**
+     * Converts a QueueStore entry into the format exposed by Queue. This entails
+     * converting the request data into a real request and omitting the `id` and
+     * `queueName` properties.
+     *
+     * @param {Object} queueStoreEntry
+     * @return {Object}
+     * @private
+     */
+
+    const convertEntry = queueStoreEntry => {
+      const queueEntry = {
+        request: new StorableRequest(queueStoreEntry.requestData).toRequest(),
+        timestamp: queueStoreEntry.timestamp
+      };
+
+      if (queueStoreEntry.metadata) {
+        queueEntry.metadata = queueStoreEntry.metadata;
+      }
+
+      return queueEntry;
+    };
+    /**
+     * A class to manage storing failed requests in IndexedDB and retrying them
+     * later. All parts of the storing and replaying process are observable via
+     * callbacks.
+     *
+     * @memberof module:workbox-background-sync
+     */
+
+
+    class Queue {
+      /**
+       * Creates an instance of Queue with the given options
+       *
+       * @param {string} name The unique name for this queue. This name must be
+       *     unique as it's used to register sync events and store requests
+       *     in IndexedDB specific to this instance. An error will be thrown if
+       *     a duplicate name is detected.
+       * @param {Object} [options]
+       * @param {Function} [options.onSync] A function that gets invoked whenever
+       *     the 'sync' event fires. The function is invoked with an object
+       *     containing the `queue` property (referencing this instance), and you
+       *     can use the callback to customize the replay behavior of the queue.
+       *     When not set the `replayRequests()` method is called.
+       *     Note: if the replay fails after a sync event, make sure you throw an
+       *     error, so the browser knows to retry the sync event later.
+       * @param {number} [options.maxRetentionTime=7 days] The amount of time (in
+       *     minutes) a request may be retried. After this amount of time has
+       *     passed, the request will be deleted from the queue.
+       */
+      constructor(name, {
+        onSync,
+        maxRetentionTime
+      } = {}) {
+        this._syncInProgress = false;
+        this._requestsAddedDuringSync = false; // Ensure the store name is not already being used
+
+        if (queueNames.has(name)) {
+          throw new WorkboxError_js.WorkboxError('duplicate-queue-name', {
+            name
+          });
+        } else {
+          queueNames.add(name);
+        }
+
+        this._name = name;
+        this._onSync = onSync || this.replayRequests;
+        this._maxRetentionTime = maxRetentionTime || MAX_RETENTION_TIME;
+        this._queueStore = new QueueStore(this._name);
+
+        this._addSyncListener();
+      }
+      /**
+       * @return {string}
+       */
+
+
+      get name() {
+        return this._name;
+      }
+      /**
+       * Stores the passed request in IndexedDB (with its timestamp and any
+       * metadata) at the end of the queue.
+       *
+       * @param {Object} entry
+       * @param {Request} entry.request The request to store in the queue.
+       * @param {Object} [entry.metadata] Any metadata you want associated with the
+       *     stored request. When requests are replayed you'll have access to this
+       *     metadata object in case you need to modify the request beforehand.
+       * @param {number} [entry.timestamp] The timestamp (Epoch time in
+       *     milliseconds) when the request was first added to the queue. This is
+       *     used along with `maxRetentionTime` to remove outdated requests. In
+       *     general you don't need to set this value, as it's automatically set
+       *     for you (defaulting to `Date.now()`), but you can update it if you
+       *     don't want particular requests to expire.
+       */
+
+
+      async pushRequest(entry) {
+        {
+          assert_js.assert.isType(entry, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'Queue',
+            funcName: 'pushRequest',
+            paramName: 'entry'
+          });
+          assert_js.assert.isInstance(entry.request, Request, {
+            moduleName: 'workbox-background-sync',
+            className: 'Queue',
+            funcName: 'pushRequest',
+            paramName: 'entry.request'
+          });
+        }
+
+        await this._addRequest(entry, 'push');
+      }
+      /**
+       * Stores the passed request in IndexedDB (with its timestamp and any
+       * metadata) at the beginning of the queue.
+       *
+       * @param {Object} entry
+       * @param {Request} entry.request The request to store in the queue.
+       * @param {Object} [entry.metadata] Any metadata you want associated with the
+       *     stored request. When requests are replayed you'll have access to this
+       *     metadata object in case you need to modify the request beforehand.
+       * @param {number} [entry.timestamp] The timestamp (Epoch time in
+       *     milliseconds) when the request was first added to the queue. This is
+       *     used along with `maxRetentionTime` to remove outdated requests. In
+       *     general you don't need to set this value, as it's automatically set
+       *     for you (defaulting to `Date.now()`), but you can update it if you
+       *     don't want particular requests to expire.
+       */
+
+
+      async unshiftRequest(entry) {
+        {
+          assert_js.assert.isType(entry, 'object', {
+            moduleName: 'workbox-background-sync',
+            className: 'Queue',
+            funcName: 'unshiftRequest',
+            paramName: 'entry'
+          });
+          assert_js.assert.isInstance(entry.request, Request, {
+            moduleName: 'workbox-background-sync',
+            className: 'Queue',
+            funcName: 'unshiftRequest',
+            paramName: 'entry.request'
+          });
+        }
+
+        await this._addRequest(entry, 'unshift');
+      }
+      /**
+       * Removes and returns the last request in the queue (along with its
+       * timestamp and any metadata). The returned object takes the form:
+       * `{request, timestamp, metadata}`.
+       *
+       * @return {Promise<Object>}
+       */
+
+
+      async popRequest() {
+        return this._removeRequest('pop');
+      }
+      /**
+       * Removes and returns the first request in the queue (along with its
+       * timestamp and any metadata). The returned object takes the form:
+       * `{request, timestamp, metadata}`.
+       *
+       * @return {Promise<Object>}
+       */
+
+
+      async shiftRequest() {
+        return this._removeRequest('shift');
+      }
+      /**
+       * Returns all the entries that have not expired (per `maxRetentionTime`).
+       * Any expired entries are removed from the queue.
+       *
+       * @return {Promise<Array<Object>>}
+       */
+
+
+      async getAll() {
+        const allEntries = await this._queueStore.getAll();
+        const now = Date.now();
+        const unexpiredEntries = [];
+
+        for (const entry of allEntries) {
+          // Ignore requests older than maxRetentionTime. Call this function
+          // recursively until an unexpired request is found.
+          const maxRetentionTimeInMs = this._maxRetentionTime * 60 * 1000;
+
+          if (now - entry.timestamp > maxRetentionTimeInMs) {
+            await this._queueStore.deleteEntry(entry.id);
+          } else {
+            unexpiredEntries.push(convertEntry(entry));
+          }
+        }
+
+        return unexpiredEntries;
+      }
+      /**
+       * Adds the entry to the QueueStore and registers for a sync event.
+       *
+       * @param {Object} entry
+       * @param {Request} entry.request
+       * @param {Object} [entry.metadata]
+       * @param {number} [entry.timestamp=Date.now()]
+       * @param {string} operation ('push' or 'unshift')
+       * @private
+       */
+
+
+      async _addRequest({
+        request,
+        metadata,
+        timestamp = Date.now()
+      }, operation) {
+        const storableRequest = await StorableRequest.fromRequest(request.clone());
+        const entry = {
+          requestData: storableRequest.toObject(),
+          timestamp
+        }; // Only include metadata if it's present.
+
+        if (metadata) {
+          entry.metadata = metadata;
+        }
+
+        await this._queueStore[`${operation}Entry`](entry);
+
+        {
+          logger_js.logger.log(`Request for '${getFriendlyURL_js.getFriendlyURL(request.url)}' has ` + `been added to background sync queue '${this._name}'.`);
+        } // Don't register for a sync if we're in the middle of a sync. Instead,
+        // we wait until the sync is complete and call register if
+        // `this._requestsAddedDuringSync` is true.
+
+
+        if (this._syncInProgress) {
+          this._requestsAddedDuringSync = true;
+        } else {
+          await this.registerSync();
+        }
+      }
+      /**
+       * Removes and returns the first or last (depending on `operation`) entry
+       * from the QueueStore that's not older than the `maxRetentionTime`.
+       *
+       * @param {string} operation ('pop' or 'shift')
+       * @return {Object|undefined}
+       * @private
+       */
+
+
+      async _removeRequest(operation) {
+        const now = Date.now();
+        const entry = await this._queueStore[`${operation}Entry`]();
+
+        if (entry) {
+          // Ignore requests older than maxRetentionTime. Call this function
+          // recursively until an unexpired request is found.
+          const maxRetentionTimeInMs = this._maxRetentionTime * 60 * 1000;
+
+          if (now - entry.timestamp > maxRetentionTimeInMs) {
+            return this._removeRequest(operation);
+          }
+
+          return convertEntry(entry);
+        } else {
+          return undefined;
+        }
+      }
+      /**
+       * Loops through each request in the queue and attempts to re-fetch it.
+       * If any request fails to re-fetch, it's put back in the same position in
+       * the queue (which registers a retry for the next sync event).
+       */
+
+
+      async replayRequests() {
+        let entry;
+
+        while (entry = await this.shiftRequest()) {
+          try {
+            await fetch(entry.request.clone());
+
+            if ("dev" !== 'production') {
+              logger_js.logger.log(`Request for '${getFriendlyURL_js.getFriendlyURL(entry.request.url)}'` + `has been replayed in queue '${this._name}'`);
+            }
+          } catch (error) {
+            await this.unshiftRequest(entry);
+
+            {
+              logger_js.logger.log(`Request for '${getFriendlyURL_js.getFriendlyURL(entry.request.url)}'` + `failed to replay, putting it back in queue '${this._name}'`);
+            }
+
+            throw new WorkboxError_js.WorkboxError('queue-replay-failed', {
+              name: this._name
+            });
+          }
+        }
+
+        {
+          logger_js.logger.log(`All requests in queue '${this.name}' have successfully ` + `replayed; the queue is now empty!`);
+        }
+      }
+      /**
+       * Registers a sync event with a tag unique to this instance.
+       */
+
+
+      async registerSync() {
+        if ('sync' in self.registration) {
+          try {
+            await self.registration.sync.register(`${TAG_PREFIX}:${this._name}`);
+          } catch (err) {
+            // This means the registration failed for some reason, possibly due to
+            // the user disabling it.
+            {
+              logger_js.logger.warn(`Unable to register sync event for '${this._name}'.`, err);
+            }
+          }
+        }
+      }
+      /**
+       * In sync-supporting browsers, this adds a listener for the sync event.
+       * In non-sync-supporting browsers, this will retry the queue on service
+       * worker startup.
+       *
+       * @private
+       */
+
+
+      _addSyncListener() {
+        if ('sync' in self.registration) {
+          self.addEventListener('sync', event => {
+            if (event.tag === `${TAG_PREFIX}:${this._name}`) {
+              {
+                logger_js.logger.log(`Background sync for tag '${event.tag}'` + `has been received`);
+              }
+
+              const syncComplete = async () => {
+                this._syncInProgress = true;
+                let syncError;
+
+                try {
+                  await this._onSync({
+                    queue: this
+                  });
+                } catch (error) {
+                  syncError = error; // Rethrow the error. Note: the logic in the finally clause
+                  // will run before this gets rethrown.
+
+                  throw syncError;
+                } finally {
+                  // New items may have been added to the queue during the sync,
+                  // so we need to register for a new sync if that's happened...
+                  // Unless there was an error during the sync, in which
+                  // case the browser will automatically retry later, as long
+                  // as `event.lastChance` is not true.
+                  if (this._requestsAddedDuringSync && !(syncError && !event.lastChance)) {
+                    await this.registerSync();
+                  }
+
+                  this._syncInProgress = false;
+                  this._requestsAddedDuringSync = false;
+                }
+              };
+
+              event.waitUntil(syncComplete());
+            }
+          });
+        } else {
+          {
+            logger_js.logger.log(`Background sync replaying without background sync event`);
+          } // If the browser doesn't support background sync, retry
+          // every time the service worker starts up as a fallback.
+
+
+          this._onSync({
+            queue: this
+          });
+        }
+      }
+      /**
+       * Returns the set of queue names. This is primarily used to reset the list
+       * of queue names in tests.
+       *
+       * @return {Set}
+       *
+       * @private
+       */
+
+
+      static get _queueNames() {
+        return queueNames;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * A class implementing the `fetchDidFail` lifecycle callback. This makes it
+     * easier to add failed requests to a background sync Queue.
+     *
+     * @memberof module:workbox-background-sync
+     */
+
+    class BackgroundSyncPlugin {
+      /**
+       * @param {string} name See the [Queue]{@link module:workbox-background-sync.Queue}
+       *     documentation for parameter details.
+       * @param {Object} [options] See the
+       *     [Queue]{@link module:workbox-background-sync.Queue} documentation for
+       *     parameter details.
+       */
+      constructor(name, options) {
+        /**
+         * @param {Object} options
+         * @param {Request} options.request
+         * @private
+         */
+        this.fetchDidFail = async ({
+          request
+        }) => {
+          await this._queue.pushRequest({
+            request
+          });
+        };
+
+        this._queue = new Queue(name, options);
+      }
+
+    }
+
+    exports.BackgroundSyncPlugin = BackgroundSyncPlugin;
+    exports.Queue = Queue;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-background-sync.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.backgroundSync=function(t,e,s,i,n){"use strict";try{self["workbox:background-sync:5.1.4"]&&_()}catch(t){}class a{constructor(t){this.t=t,this.s=new n.DBWrapper("workbox-background-sync",3,{onupgradeneeded:this.i})}async pushEntry(t){delete t.id,t.queueName=this.t,await this.s.add("requests",t)}async unshiftEntry(t){const[e]=await this.s.getAllMatching("requests",{count:1});e?t.id=e.id-1:delete t.id,t.queueName=this.t,await this.s.add("requests",t)}async popEntry(){return this.h({direction:"prev"})}async shiftEntry(){return this.h({direction:"next"})}async getAll(){return await this.s.getAllMatching("requests",{index:"queueName",query:IDBKeyRange.only(this.t)})}async deleteEntry(t){await this.s.delete("requests",t)}async h({direction:t}){const[e]=await this.s.getAllMatching("requests",{direction:t,index:"queueName",query:IDBKeyRange.only(this.t),count:1});if(e)return await this.deleteEntry(e.id),e}i(t){const e=t.target.result;t.oldVersion>0&&t.oldVersion<3&&e.objectStoreNames.contains("requests")&&e.deleteObjectStore("requests");e.createObjectStore("requests",{autoIncrement:!0,keyPath:"id"}).createIndex("queueName","queueName",{unique:!1})}}const r=["method","referrer","referrerPolicy","mode","credentials","cache","redirect","integrity","keepalive"];class c{constructor(t){"navigate"===t.mode&&(t.mode="same-origin"),this.u=t}static async fromRequest(t){const e={url:t.url,headers:{}};"GET"!==t.method&&(e.body=await t.clone().arrayBuffer());for(const[s,i]of t.headers.entries())e.headers[s]=i;for(const s of r)void 0!==t[s]&&(e[s]=t[s]);return new c(e)}toObject(){const t=Object.assign({},this.u);return t.headers=Object.assign({},this.u.headers),t.body&&(t.body=t.body.slice(0)),t}toRequest(){return new Request(this.u.url,this.u)}clone(){return new c(this.toObject())}}const h=new Set,u=t=>{const e={request:new c(t.requestData).toRequest(),timestamp:t.timestamp};return t.metadata&&(e.metadata=t.metadata),e};class o{constructor(t,{onSync:s,maxRetentionTime:i}={}){if(this.o=!1,this.q=!1,h.has(t))throw new e.WorkboxError("duplicate-queue-name",{name:t});h.add(t),this.l=t,this.m=s||this.replayRequests,this.p=i||10080,this.g=new a(this.l),this.R()}get name(){return this.l}async pushRequest(t){await this.k(t,"push")}async unshiftRequest(t){await this.k(t,"unshift")}async popRequest(){return this.D("pop")}async shiftRequest(){return this.D("shift")}async getAll(){const t=await this.g.getAll(),e=Date.now(),s=[];for(const i of t){const t=60*this.p*1e3;e-i.timestamp>t?await this.g.deleteEntry(i.id):s.push(u(i))}return s}async k({request:t,metadata:e,timestamp:s=Date.now()},i){const n={requestData:(await c.fromRequest(t.clone())).toObject(),timestamp:s};e&&(n.metadata=e),await this.g[i+"Entry"](n),this.o?this.q=!0:await this.registerSync()}async D(t){const e=Date.now(),s=await this.g[t+"Entry"]();if(s){const i=60*this.p*1e3;return e-s.timestamp>i?this.D(t):u(s)}}async replayRequests(){let t;for(;t=await this.shiftRequest();)try{await fetch(t.request.clone())}catch(s){throw await this.unshiftRequest(t),new e.WorkboxError("queue-replay-failed",{name:this.l})}}async registerSync(){if("sync"in self.registration)try{await self.registration.sync.register("workbox-background-sync:"+this.l)}catch(t){}}R(){"sync"in self.registration?self.addEventListener("sync",t=>{if(t.tag==="workbox-background-sync:"+this.l){const e=async()=>{let e;this.o=!0;try{await this.m({queue:this})}catch(t){throw e=t,e}finally{!this.q||e&&!t.lastChance||await this.registerSync(),this.o=!1,this.q=!1}};t.waitUntil(e())}}):this.m({queue:this})}static get _(){return h}}return t.BackgroundSyncPlugin=class{constructor(t,e){this.fetchDidFail=async({request:t})=>{await this.v.pushRequest({request:t})},this.v=new o(t,e)}},t.Queue=o,t}({},workbox.core._private,workbox.core._private,workbox.core._private,workbox.core._private);
+

source/js/workbox/workbox-broadcast-update.dev.js

@@ -0,0 +1,288 @@
+this.workbox = this.workbox || {};
+this.workbox.broadcastUpdate = (function (exports, assert_js, timeout_js, resultingClientExists_js, logger_js, WorkboxError_js, dontWaitFor_js) {
+    'use strict';
+
+    try {
+      self['workbox:broadcast-update:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * Given two `Response's`, compares several header values to see if they are
+     * the same or not.
+     *
+     * @param {Response} firstResponse
+     * @param {Response} secondResponse
+     * @param {Array<string>} headersToCheck
+     * @return {boolean}
+     *
+     * @memberof module:workbox-broadcast-update
+     */
+
+    const responsesAreSame = (firstResponse, secondResponse, headersToCheck) => {
+      {
+        if (!(firstResponse instanceof Response && secondResponse instanceof Response)) {
+          throw new WorkboxError_js.WorkboxError('invalid-responses-are-same-args');
+        }
+      }
+
+      const atLeastOneHeaderAvailable = headersToCheck.some(header => {
+        return firstResponse.headers.has(header) && secondResponse.headers.has(header);
+      });
+
+      if (!atLeastOneHeaderAvailable) {
+        {
+          logger_js.logger.warn(`Unable to determine where the response has been updated ` + `because none of the headers that would be checked are present.`);
+          logger_js.logger.debug(`Attempting to compare the following: `, firstResponse, secondResponse, headersToCheck);
+        } // Just return true, indicating the that responses are the same, since we
+        // can't determine otherwise.
+
+
+        return true;
+      }
+
+      return headersToCheck.every(header => {
+        const headerStateComparison = firstResponse.headers.has(header) === secondResponse.headers.has(header);
+        const headerValueComparison = firstResponse.headers.get(header) === secondResponse.headers.get(header);
+        return headerStateComparison && headerValueComparison;
+      });
+    };
+
+    /*
+      Copyright 2018 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.
+    */
+    const CACHE_UPDATED_MESSAGE_TYPE = 'CACHE_UPDATED';
+    const CACHE_UPDATED_MESSAGE_META = 'workbox-broadcast-update';
+    const DEFAULT_HEADERS_TO_CHECK = ['content-length', 'etag', 'last-modified'];
+
+    /*
+      Copyright 2018 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.
+    */
+    // TODO(philipwalton): remove once this Safari bug fix has been released.
+    // https://bugs.webkit.org/show_bug.cgi?id=201169
+
+    const isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
+    /**
+     * Generates the default payload used in update messages. By default the
+     * payload includes the `cacheName` and `updatedURL` fields.
+     *
+     * @return Object
+     * @private
+     */
+
+    function defaultPayloadGenerator(data) {
+      return {
+        cacheName: data.cacheName,
+        updatedURL: data.request.url
+      };
+    }
+    /**
+     * Uses the `postMessage()` API to inform any open windows/tabs when a cached
+     * response has been updated.
+     *
+     * For efficiency's sake, the underlying response bodies are not compared;
+     * only specific response headers are checked.
+     *
+     * @memberof module:workbox-broadcast-update
+     */
+
+
+    class BroadcastCacheUpdate {
+      /**
+       * Construct a BroadcastCacheUpdate instance with a specific `channelName` to
+       * broadcast messages on
+       *
+       * @param {Object} options
+       * @param {Array<string>} [options.headersToCheck=['content-length', 'etag', 'last-modified']]
+       *     A list of headers that will be used to determine whether the responses
+       *     differ.
+       * @param {string} [options.generatePayload] A function whose return value
+       *     will be used as the `payload` field in any cache update messages sent
+       *     to the window clients.
+       */
+      constructor({
+        headersToCheck,
+        generatePayload
+      } = {}) {
+        this._headersToCheck = headersToCheck || DEFAULT_HEADERS_TO_CHECK;
+        this._generatePayload = generatePayload || defaultPayloadGenerator;
+      }
+      /**
+       * Compares two [Responses](https://developer.mozilla.org/en-US/docs/Web/API/Response)
+       * and sends a message (via `postMessage()`) to all window clients if the
+       * responses differ (note: neither of the Responses can be
+       * {@link http://stackoverflow.com/questions/39109789|opaque}).
+       *
+       * The message that's posted has the following format (where `payload` can
+       * be customized via the `generatePayload` option the instance is created
+       * with):
+       *
+       * ```
+       * {
+       *   type: 'CACHE_UPDATED',
+       *   meta: 'workbox-broadcast-update',
+       *   payload: {
+       *     cacheName: 'the-cache-name',
+       *     updatedURL: 'https://example.com/'
+       *   }
+       * }
+       * ```
+       *
+       * @param {Object} options
+       * @param {Response} [options.oldResponse] Cached response to compare.
+       * @param {Response} options.newResponse Possibly updated response to compare.
+       * @param {Request} options.request The request.
+       * @param {string} options.cacheName Name of the cache the responses belong
+       *     to. This is included in the broadcast message.
+       * @param {Event} [options.event] event An optional event that triggered
+       *     this possible cache update.
+       * @return {Promise} Resolves once the update is sent.
+       */
+
+
+      async notifyIfUpdated(options) {
+        {
+          assert_js.assert.isType(options.cacheName, 'string', {
+            moduleName: 'workbox-broadcast-update',
+            className: 'BroadcastCacheUpdate',
+            funcName: 'notifyIfUpdated',
+            paramName: 'cacheName'
+          });
+          assert_js.assert.isInstance(options.newResponse, Response, {
+            moduleName: 'workbox-broadcast-update',
+            className: 'BroadcastCacheUpdate',
+            funcName: 'notifyIfUpdated',
+            paramName: 'newResponse'
+          });
+          assert_js.assert.isInstance(options.request, Request, {
+            moduleName: 'workbox-broadcast-update',
+            className: 'BroadcastCacheUpdate',
+            funcName: 'notifyIfUpdated',
+            paramName: 'request'
+          });
+        } // Without two responses there is nothing to compare.
+
+
+        if (!options.oldResponse) {
+          return;
+        }
+
+        if (!responsesAreSame(options.oldResponse, options.newResponse, this._headersToCheck)) {
+          {
+            logger_js.logger.log(`Newer response found (and cached) for:`, options.request.url);
+          }
+
+          const messageData = {
+            type: CACHE_UPDATED_MESSAGE_TYPE,
+            meta: CACHE_UPDATED_MESSAGE_META,
+            payload: this._generatePayload(options)
+          }; // For navigation requests, wait until the new window client exists
+          // before sending the message
+
+          if (options.request.mode === 'navigate') {
+            let resultingClientId;
+
+            if (options.event instanceof FetchEvent) {
+              resultingClientId = options.event.resultingClientId;
+            }
+
+            const resultingWin = await resultingClientExists_js.resultingClientExists(resultingClientId); // Safari does not currently implement postMessage buffering and
+            // there's no good way to feature detect that, so to increase the
+            // chances of the message being delivered in Safari, we add a timeout.
+            // We also do this if `resultingClientExists()` didn't return a client,
+            // which means it timed out, so it's worth waiting a bit longer.
+
+            if (!resultingWin || isSafari) {
+              // 3500 is chosen because (according to CrUX data) 80% of mobile
+              // websites hit the DOMContentLoaded event in less than 3.5 seconds.
+              // And presumably sites implementing service worker are on the
+              // higher end of the performance spectrum.
+              await timeout_js.timeout(3500);
+            }
+          }
+
+          const windows = await self.clients.matchAll({
+            type: 'window'
+          });
+
+          for (const win of windows) {
+            win.postMessage(messageData);
+          }
+        }
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * This plugin will automatically broadcast a message whenever a cached response
+     * is updated.
+     *
+     * @memberof module:workbox-broadcast-update
+     */
+
+    class BroadcastUpdatePlugin {
+      /**
+       * Construct a BroadcastCacheUpdate instance with the passed options and
+       * calls its [`notifyIfUpdated()`]{@link module:workbox-broadcast-update.BroadcastCacheUpdate~notifyIfUpdated}
+       * method whenever the plugin's `cacheDidUpdate` callback is invoked.
+       *
+       * @param {Object} options
+       * @param {Array<string>} [options.headersToCheck=['content-length', 'etag', 'last-modified']]
+       *     A list of headers that will be used to determine whether the responses
+       *     differ.
+       * @param {string} [options.generatePayload] A function whose return value
+       *     will be used as the `payload` field in any cache update messages sent
+       *     to the window clients.
+       */
+      constructor(options) {
+        /**
+         * A "lifecycle" callback that will be triggered automatically by the
+         * `workbox-sw` and `workbox-runtime-caching` handlers when an entry is
+         * added to a cache.
+         *
+         * @private
+         * @param {Object} options The input object to this function.
+         * @param {string} options.cacheName Name of the cache being updated.
+         * @param {Response} [options.oldResponse] The previous cached value, if any.
+         * @param {Response} options.newResponse The new value in the cache.
+         * @param {Request} options.request The request that triggered the update.
+         * @param {Request} [options.event] The event that triggered the update.
+         */
+        this.cacheDidUpdate = async options => {
+          dontWaitFor_js.dontWaitFor(this._broadcastUpdate.notifyIfUpdated(options));
+        };
+
+        this._broadcastUpdate = new BroadcastCacheUpdate(options);
+      }
+
+    }
+
+    exports.BroadcastCacheUpdate = BroadcastCacheUpdate;
+    exports.BroadcastUpdatePlugin = BroadcastUpdatePlugin;
+    exports.responsesAreSame = responsesAreSame;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-broadcast-update.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.broadcastUpdate=function(t,a,o,s){"use strict";try{self["workbox:broadcast-update:5.1.4"]&&_()}catch(t){}const e=(t,a,o)=>!o.some(o=>t.headers.has(o)&&a.headers.has(o))||o.every(o=>{const s=t.headers.has(o)===a.headers.has(o),e=t.headers.get(o)===a.headers.get(o);return s&&e}),n=["content-length","etag","last-modified"],i=/^((?!chrome|android).)*safari/i.test(navigator.userAgent);function c(t){return{cacheName:t.cacheName,updatedURL:t.request.url}}class r{constructor({headersToCheck:t,generatePayload:a}={}){this.t=t||n,this.o=a||c}async notifyIfUpdated(t){if(t.oldResponse&&!e(t.oldResponse,t.newResponse,this.t)){const s={type:"CACHE_UPDATED",meta:"workbox-broadcast-update",payload:this.o(t)};if("navigate"===t.request.mode){let s;t.event instanceof FetchEvent&&(s=t.event.resultingClientId);await o.resultingClientExists(s)&&!i||await a.timeout(3500)}const e=await self.clients.matchAll({type:"window"});for(const t of e)t.postMessage(s)}}}return t.BroadcastCacheUpdate=r,t.BroadcastUpdatePlugin=class{constructor(t){this.cacheDidUpdate=async t=>{s.dontWaitFor(this.s.notifyIfUpdated(t))},this.s=new r(t)}},t.responsesAreSame=e,t}({},workbox.core._private,workbox.core._private,workbox.core._private);
+

source/js/workbox/workbox-cacheable-response.dev.js

@@ -0,0 +1,191 @@
+this.workbox = this.workbox || {};
+this.workbox.cacheableResponse = (function (exports, assert_js, WorkboxError_js, getFriendlyURL_js, logger_js) {
+    'use strict';
+
+    try {
+      self['workbox:cacheable-response:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * This class allows you to set up rules determining what
+     * status codes and/or headers need to be present in order for a
+     * [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response)
+     * to be considered cacheable.
+     *
+     * @memberof module:workbox-cacheable-response
+     */
+
+    class CacheableResponse {
+      /**
+       * To construct a new CacheableResponse instance you must provide at least
+       * one of the `config` properties.
+       *
+       * If both `statuses` and `headers` are specified, then both conditions must
+       * be met for the `Response` to be considered cacheable.
+       *
+       * @param {Object} config
+       * @param {Array<number>} [config.statuses] One or more status codes that a
+       * `Response` can have and be considered cacheable.
+       * @param {Object<string,string>} [config.headers] A mapping of header names
+       * and expected values that a `Response` can have and be considered cacheable.
+       * If multiple headers are provided, only one needs to be present.
+       */
+      constructor(config = {}) {
+        {
+          if (!(config.statuses || config.headers)) {
+            throw new WorkboxError_js.WorkboxError('statuses-or-headers-required', {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor'
+            });
+          }
+
+          if (config.statuses) {
+            assert_js.assert.isArray(config.statuses, {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor',
+              paramName: 'config.statuses'
+            });
+          }
+
+          if (config.headers) {
+            assert_js.assert.isType(config.headers, 'object', {
+              moduleName: 'workbox-cacheable-response',
+              className: 'CacheableResponse',
+              funcName: 'constructor',
+              paramName: 'config.headers'
+            });
+          }
+        }
+
+        this._statuses = config.statuses;
+        this._headers = config.headers;
+      }
+      /**
+       * Checks a response to see whether it's cacheable or not, based on this
+       * object's configuration.
+       *
+       * @param {Response} response The response whose cacheability is being
+       * checked.
+       * @return {boolean} `true` if the `Response` is cacheable, and `false`
+       * otherwise.
+       */
+
+
+      isResponseCacheable(response) {
+        {
+          assert_js.assert.isInstance(response, Response, {
+            moduleName: 'workbox-cacheable-response',
+            className: 'CacheableResponse',
+            funcName: 'isResponseCacheable',
+            paramName: 'response'
+          });
+        }
+
+        let cacheable = true;
+
+        if (this._statuses) {
+          cacheable = this._statuses.includes(response.status);
+        }
+
+        if (this._headers && cacheable) {
+          cacheable = Object.keys(this._headers).some(headerName => {
+            return response.headers.get(headerName) === this._headers[headerName];
+          });
+        }
+
+        {
+          if (!cacheable) {
+            logger_js.logger.groupCollapsed(`The request for ` + `'${getFriendlyURL_js.getFriendlyURL(response.url)}' returned a response that does ` + `not meet the criteria for being cached.`);
+            logger_js.logger.groupCollapsed(`View cacheability criteria here.`);
+            logger_js.logger.log(`Cacheable statuses: ` + JSON.stringify(this._statuses));
+            logger_js.logger.log(`Cacheable headers: ` + JSON.stringify(this._headers, null, 2));
+            logger_js.logger.groupEnd();
+            const logFriendlyHeaders = {};
+            response.headers.forEach((value, key) => {
+              logFriendlyHeaders[key] = value;
+            });
+            logger_js.logger.groupCollapsed(`View response status and headers here.`);
+            logger_js.logger.log(`Response status: ` + response.status);
+            logger_js.logger.log(`Response headers: ` + JSON.stringify(logFriendlyHeaders, null, 2));
+            logger_js.logger.groupEnd();
+            logger_js.logger.groupCollapsed(`View full response details here.`);
+            logger_js.logger.log(response.headers);
+            logger_js.logger.log(response);
+            logger_js.logger.groupEnd();
+            logger_js.logger.groupEnd();
+          }
+        }
+
+        return cacheable;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * A class implementing the `cacheWillUpdate` lifecycle callback. This makes it
+     * easier to add in cacheability checks to requests made via Workbox's built-in
+     * strategies.
+     *
+     * @memberof module:workbox-cacheable-response
+     */
+
+    class CacheableResponsePlugin {
+      /**
+       * To construct a new CacheableResponsePlugin instance you must provide at
+       * least one of the `config` properties.
+       *
+       * If both `statuses` and `headers` are specified, then both conditions must
+       * be met for the `Response` to be considered cacheable.
+       *
+       * @param {Object} config
+       * @param {Array<number>} [config.statuses] One or more status codes that a
+       * `Response` can have and be considered cacheable.
+       * @param {Object<string,string>} [config.headers] A mapping of header names
+       * and expected values that a `Response` can have and be considered cacheable.
+       * If multiple headers are provided, only one needs to be present.
+       */
+      constructor(config) {
+        /**
+         * @param {Object} options
+         * @param {Response} options.response
+         * @return {Response|null}
+         * @private
+         */
+        this.cacheWillUpdate = async ({
+          response
+        }) => {
+          if (this._cacheableResponse.isResponseCacheable(response)) {
+            return response;
+          }
+
+          return null;
+        };
+
+        this._cacheableResponse = new CacheableResponse(config);
+      }
+
+    }
+
+    exports.CacheableResponse = CacheableResponse;
+    exports.CacheableResponsePlugin = CacheableResponsePlugin;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-cacheable-response.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.cacheableResponse=function(s){"use strict";try{self["workbox:cacheable-response:5.1.4"]&&_()}catch(s){}class t{constructor(s={}){this.s=s.statuses,this.t=s.headers}isResponseCacheable(s){let t=!0;return this.s&&(t=this.s.includes(s.status)),this.t&&t&&(t=Object.keys(this.t).some(t=>s.headers.get(t)===this.t[t])),t}}return s.CacheableResponse=t,s.CacheableResponsePlugin=class{constructor(s){this.cacheWillUpdate=async({response:s})=>this.i.isResponseCacheable(s)?s:null,this.i=new t(s)}},s}({});
+

source/js/workbox/workbox-expiration.dev.js

@@ -0,0 +1,649 @@
+this.workbox = this.workbox || {};
+this.workbox.expiration = (function (exports, assert_js, dontWaitFor_js, logger_js, WorkboxError_js, DBWrapper_js, deleteDatabase_js, cacheNames_js, getFriendlyURL_js, registerQuotaErrorCallback_js) {
+    'use strict';
+
+    try {
+      self['workbox:expiration:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    const DB_NAME = 'workbox-expiration';
+    const OBJECT_STORE_NAME = 'cache-entries';
+
+    const normalizeURL = unNormalizedUrl => {
+      const url = new URL(unNormalizedUrl, location.href);
+      url.hash = '';
+      return url.href;
+    };
+    /**
+     * Returns the timestamp model.
+     *
+     * @private
+     */
+
+
+    class CacheTimestampsModel {
+      /**
+       *
+       * @param {string} cacheName
+       *
+       * @private
+       */
+      constructor(cacheName) {
+        this._cacheName = cacheName;
+        this._db = new DBWrapper_js.DBWrapper(DB_NAME, 1, {
+          onupgradeneeded: event => this._handleUpgrade(event)
+        });
+      }
+      /**
+       * Should perform an upgrade of indexedDB.
+       *
+       * @param {Event} event
+       *
+       * @private
+       */
+
+
+      _handleUpgrade(event) {
+        const db = event.target.result; // TODO(philipwalton): EdgeHTML doesn't support arrays as a keyPath, so we
+        // have to use the `id` keyPath here and create our own values (a
+        // concatenation of `url + cacheName`) instead of simply using
+        // `keyPath: ['url', 'cacheName']`, which is supported in other browsers.
+
+        const objStore = db.createObjectStore(OBJECT_STORE_NAME, {
+          keyPath: 'id'
+        }); // TODO(philipwalton): once we don't have to support EdgeHTML, we can
+        // create a single index with the keyPath `['cacheName', 'timestamp']`
+        // instead of doing both these indexes.
+
+        objStore.createIndex('cacheName', 'cacheName', {
+          unique: false
+        });
+        objStore.createIndex('timestamp', 'timestamp', {
+          unique: false
+        }); // Previous versions of `workbox-expiration` used `this._cacheName`
+        // as the IDBDatabase name.
+
+        deleteDatabase_js.deleteDatabase(this._cacheName);
+      }
+      /**
+       * @param {string} url
+       * @param {number} timestamp
+       *
+       * @private
+       */
+
+
+      async setTimestamp(url, timestamp) {
+        url = normalizeURL(url);
+        const entry = {
+          url,
+          timestamp,
+          cacheName: this._cacheName,
+          // Creating an ID from the URL and cache name won't be necessary once
+          // Edge switches to Chromium and all browsers we support work with
+          // array keyPaths.
+          id: this._getId(url)
+        };
+        await this._db.put(OBJECT_STORE_NAME, entry);
+      }
+      /**
+       * Returns the timestamp stored for a given URL.
+       *
+       * @param {string} url
+       * @return {number}
+       *
+       * @private
+       */
+
+
+      async getTimestamp(url) {
+        const entry = await this._db.get(OBJECT_STORE_NAME, this._getId(url));
+        return entry.timestamp;
+      }
+      /**
+       * Iterates through all the entries in the object store (from newest to
+       * oldest) and removes entries once either `maxCount` is reached or the
+       * entry's timestamp is less than `minTimestamp`.
+       *
+       * @param {number} minTimestamp
+       * @param {number} maxCount
+       * @return {Array<string>}
+       *
+       * @private
+       */
+
+
+      async expireEntries(minTimestamp, maxCount) {
+        const entriesToDelete = await this._db.transaction(OBJECT_STORE_NAME, 'readwrite', (txn, done) => {
+          const store = txn.objectStore(OBJECT_STORE_NAME);
+          const request = store.index('timestamp').openCursor(null, 'prev');
+          const entriesToDelete = [];
+          let entriesNotDeletedCount = 0;
+
+          request.onsuccess = () => {
+            const cursor = request.result;
+
+            if (cursor) {
+              const result = cursor.value; // TODO(philipwalton): once we can use a multi-key index, we
+              // won't have to check `cacheName` here.
+
+              if (result.cacheName === this._cacheName) {
+                // Delete an entry if it's older than the max age or
+                // if we already have the max number allowed.
+                if (minTimestamp && result.timestamp < minTimestamp || maxCount && entriesNotDeletedCount >= maxCount) {
+                  // TODO(philipwalton): we should be able to delete the
+                  // entry right here, but doing so causes an iteration
+                  // bug in Safari stable (fixed in TP). Instead we can
+                  // store the keys of the entries to delete, and then
+                  // delete the separate transactions.
+                  // https://github.com/GoogleChrome/workbox/issues/1978
+                  // cursor.delete();
+                  // We only need to return the URL, not the whole entry.
+                  entriesToDelete.push(cursor.value);
+                } else {
+                  entriesNotDeletedCount++;
+                }
+              }
+
+              cursor.continue();
+            } else {
+              done(entriesToDelete);
+            }
+          };
+        }); // TODO(philipwalton): once the Safari bug in the following issue is fixed,
+        // we should be able to remove this loop and do the entry deletion in the
+        // cursor loop above:
+        // https://github.com/GoogleChrome/workbox/issues/1978
+
+        const urlsDeleted = [];
+
+        for (const entry of entriesToDelete) {
+          await this._db.delete(OBJECT_STORE_NAME, entry.id);
+          urlsDeleted.push(entry.url);
+        }
+
+        return urlsDeleted;
+      }
+      /**
+       * Takes a URL and returns an ID that will be unique in the object store.
+       *
+       * @param {string} url
+       * @return {string}
+       *
+       * @private
+       */
+
+
+      _getId(url) {
+        // Creating an ID from the URL and cache name won't be necessary once
+        // Edge switches to Chromium and all browsers we support work with
+        // array keyPaths.
+        return this._cacheName + '|' + normalizeURL(url);
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * The `CacheExpiration` class allows you define an expiration and / or
+     * limit on the number of responses stored in a
+     * [`Cache`](https://developer.mozilla.org/en-US/docs/Web/API/Cache).
+     *
+     * @memberof module:workbox-expiration
+     */
+
+    class CacheExpiration {
+      /**
+       * To construct a new CacheExpiration instance you must provide at least
+       * one of the `config` properties.
+       *
+       * @param {string} cacheName Name of the cache to apply restrictions to.
+       * @param {Object} config
+       * @param {number} [config.maxEntries] The maximum number of entries to cache.
+       * Entries used the least will be removed as the maximum is reached.
+       * @param {number} [config.maxAgeSeconds] The maximum age of an entry before
+       * it's treated as stale and removed.
+       */
+      constructor(cacheName, config = {}) {
+        this._isRunning = false;
+        this._rerunRequested = false;
+
+        {
+          assert_js.assert.isType(cacheName, 'string', {
+            moduleName: 'workbox-expiration',
+            className: 'CacheExpiration',
+            funcName: 'constructor',
+            paramName: 'cacheName'
+          });
+
+          if (!(config.maxEntries || config.maxAgeSeconds)) {
+            throw new WorkboxError_js.WorkboxError('max-entries-or-age-required', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor'
+            });
+          }
+
+          if (config.maxEntries) {
+            assert_js.assert.isType(config.maxEntries, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor',
+              paramName: 'config.maxEntries'
+            }); // TODO: Assert is positive
+          }
+
+          if (config.maxAgeSeconds) {
+            assert_js.assert.isType(config.maxAgeSeconds, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'CacheExpiration',
+              funcName: 'constructor',
+              paramName: 'config.maxAgeSeconds'
+            }); // TODO: Assert is positive
+          }
+        }
+
+        this._maxEntries = config.maxEntries;
+        this._maxAgeSeconds = config.maxAgeSeconds;
+        this._cacheName = cacheName;
+        this._timestampModel = new CacheTimestampsModel(cacheName);
+      }
+      /**
+       * Expires entries for the given cache and given criteria.
+       */
+
+
+      async expireEntries() {
+        if (this._isRunning) {
+          this._rerunRequested = true;
+          return;
+        }
+
+        this._isRunning = true;
+        const minTimestamp = this._maxAgeSeconds ? Date.now() - this._maxAgeSeconds * 1000 : 0;
+        const urlsExpired = await this._timestampModel.expireEntries(minTimestamp, this._maxEntries); // Delete URLs from the cache
+
+        const cache = await self.caches.open(this._cacheName);
+
+        for (const url of urlsExpired) {
+          await cache.delete(url);
+        }
+
+        {
+          if (urlsExpired.length > 0) {
+            logger_js.logger.groupCollapsed(`Expired ${urlsExpired.length} ` + `${urlsExpired.length === 1 ? 'entry' : 'entries'} and removed ` + `${urlsExpired.length === 1 ? 'it' : 'them'} from the ` + `'${this._cacheName}' cache.`);
+            logger_js.logger.log(`Expired the following ${urlsExpired.length === 1 ? 'URL' : 'URLs'}:`);
+            urlsExpired.forEach(url => logger_js.logger.log(`    ${url}`));
+            logger_js.logger.groupEnd();
+          } else {
+            logger_js.logger.debug(`Cache expiration ran and found no entries to remove.`);
+          }
+        }
+
+        this._isRunning = false;
+
+        if (this._rerunRequested) {
+          this._rerunRequested = false;
+          dontWaitFor_js.dontWaitFor(this.expireEntries());
+        }
+      }
+      /**
+       * Update the timestamp for the given URL. This ensures the when
+       * removing entries based on maximum entries, most recently used
+       * is accurate or when expiring, the timestamp is up-to-date.
+       *
+       * @param {string} url
+       */
+
+
+      async updateTimestamp(url) {
+        {
+          assert_js.assert.isType(url, 'string', {
+            moduleName: 'workbox-expiration',
+            className: 'CacheExpiration',
+            funcName: 'updateTimestamp',
+            paramName: 'url'
+          });
+        }
+
+        await this._timestampModel.setTimestamp(url, Date.now());
+      }
+      /**
+       * Can be used to check if a URL has expired or not before it's used.
+       *
+       * This requires a look up from IndexedDB, so can be slow.
+       *
+       * Note: This method will not remove the cached entry, call
+       * `expireEntries()` to remove indexedDB and Cache entries.
+       *
+       * @param {string} url
+       * @return {boolean}
+       */
+
+
+      async isURLExpired(url) {
+        if (!this._maxAgeSeconds) {
+          {
+            throw new WorkboxError_js.WorkboxError(`expired-test-without-max-age`, {
+              methodName: 'isURLExpired',
+              paramName: 'maxAgeSeconds'
+            });
+          }
+        } else {
+          const timestamp = await this._timestampModel.getTimestamp(url);
+          const expireOlderThan = Date.now() - this._maxAgeSeconds * 1000;
+          return timestamp < expireOlderThan;
+        }
+      }
+      /**
+       * Removes the IndexedDB object store used to keep track of cache expiration
+       * metadata.
+       */
+
+
+      async delete() {
+        // Make sure we don't attempt another rerun if we're called in the middle of
+        // a cache expiration.
+        this._rerunRequested = false;
+        await this._timestampModel.expireEntries(Infinity); // Expires all.
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * This plugin can be used in the Workbox APIs to regularly enforce a
+     * limit on the age and / or the number of cached requests.
+     *
+     * Whenever a cached request is used or updated, this plugin will look
+     * at the used Cache and remove any old or extra requests.
+     *
+     * When using `maxAgeSeconds`, requests may be used *once* after expiring
+     * because the expiration clean up will not have occurred until *after* the
+     * cached request has been used. If the request has a "Date" header, then
+     * a light weight expiration check is performed and the request will not be
+     * used immediately.
+     *
+     * When using `maxEntries`, the entry least-recently requested will be removed
+     * from the cache first.
+     *
+     * @memberof module:workbox-expiration
+     */
+
+    class ExpirationPlugin {
+      /**
+       * @param {Object} config
+       * @param {number} [config.maxEntries] The maximum number of entries to cache.
+       * Entries used the least will be removed as the maximum is reached.
+       * @param {number} [config.maxAgeSeconds] The maximum age of an entry before
+       * it's treated as stale and removed.
+       * @param {boolean} [config.purgeOnQuotaError] Whether to opt this cache in to
+       * automatic deletion if the available storage quota has been exceeded.
+       */
+      constructor(config = {}) {
+        /**
+         * A "lifecycle" callback that will be triggered automatically by the
+         * `workbox-strategies` handlers when a `Response` is about to be returned
+         * from a [Cache](https://developer.mozilla.org/en-US/docs/Web/API/Cache) to
+         * the handler. It allows the `Response` to be inspected for freshness and
+         * prevents it from being used if the `Response`'s `Date` header value is
+         * older than the configured `maxAgeSeconds`.
+         *
+         * @param {Object} options
+         * @param {string} options.cacheName Name of the cache the response is in.
+         * @param {Response} options.cachedResponse The `Response` object that's been
+         *     read from a cache and whose freshness should be checked.
+         * @return {Response} Either the `cachedResponse`, if it's
+         *     fresh, or `null` if the `Response` is older than `maxAgeSeconds`.
+         *
+         * @private
+         */
+        this.cachedResponseWillBeUsed = async ({
+          event,
+          request,
+          cacheName,
+          cachedResponse
+        }) => {
+          if (!cachedResponse) {
+            return null;
+          }
+
+          const isFresh = this._isResponseDateFresh(cachedResponse); // Expire entries to ensure that even if the expiration date has
+          // expired, it'll only be used once.
+
+
+          const cacheExpiration = this._getCacheExpiration(cacheName);
+
+          dontWaitFor_js.dontWaitFor(cacheExpiration.expireEntries()); // Update the metadata for the request URL to the current timestamp,
+          // but don't `await` it as we don't want to block the response.
+
+          const updateTimestampDone = cacheExpiration.updateTimestamp(request.url);
+
+          if (event) {
+            try {
+              event.waitUntil(updateTimestampDone);
+            } catch (error) {
+              {
+                // The event may not be a fetch event; only log the URL if it is.
+                if ('request' in event) {
+                  logger_js.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache entry for ` + `'${getFriendlyURL_js.getFriendlyURL(event.request.url)}'.`);
+                }
+              }
+            }
+          }
+
+          return isFresh ? cachedResponse : null;
+        };
+        /**
+         * A "lifecycle" callback that will be triggered automatically by the
+         * `workbox-strategies` handlers when an entry is added to a cache.
+         *
+         * @param {Object} options
+         * @param {string} options.cacheName Name of the cache that was updated.
+         * @param {string} options.request The Request for the cached entry.
+         *
+         * @private
+         */
+
+
+        this.cacheDidUpdate = async ({
+          cacheName,
+          request
+        }) => {
+          {
+            assert_js.assert.isType(cacheName, 'string', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'cacheDidUpdate',
+              paramName: 'cacheName'
+            });
+            assert_js.assert.isInstance(request, Request, {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'cacheDidUpdate',
+              paramName: 'request'
+            });
+          }
+
+          const cacheExpiration = this._getCacheExpiration(cacheName);
+
+          await cacheExpiration.updateTimestamp(request.url);
+          await cacheExpiration.expireEntries();
+        };
+
+        {
+          if (!(config.maxEntries || config.maxAgeSeconds)) {
+            throw new WorkboxError_js.WorkboxError('max-entries-or-age-required', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor'
+            });
+          }
+
+          if (config.maxEntries) {
+            assert_js.assert.isType(config.maxEntries, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor',
+              paramName: 'config.maxEntries'
+            });
+          }
+
+          if (config.maxAgeSeconds) {
+            assert_js.assert.isType(config.maxAgeSeconds, 'number', {
+              moduleName: 'workbox-expiration',
+              className: 'Plugin',
+              funcName: 'constructor',
+              paramName: 'config.maxAgeSeconds'
+            });
+          }
+        }
+
+        this._config = config;
+        this._maxAgeSeconds = config.maxAgeSeconds;
+        this._cacheExpirations = new Map();
+
+        if (config.purgeOnQuotaError) {
+          registerQuotaErrorCallback_js.registerQuotaErrorCallback(() => this.deleteCacheAndMetadata());
+        }
+      }
+      /**
+       * A simple helper method to return a CacheExpiration instance for a given
+       * cache name.
+       *
+       * @param {string} cacheName
+       * @return {CacheExpiration}
+       *
+       * @private
+       */
+
+
+      _getCacheExpiration(cacheName) {
+        if (cacheName === cacheNames_js.cacheNames.getRuntimeName()) {
+          throw new WorkboxError_js.WorkboxError('expire-custom-caches-only');
+        }
+
+        let cacheExpiration = this._cacheExpirations.get(cacheName);
+
+        if (!cacheExpiration) {
+          cacheExpiration = new CacheExpiration(cacheName, this._config);
+
+          this._cacheExpirations.set(cacheName, cacheExpiration);
+        }
+
+        return cacheExpiration;
+      }
+      /**
+       * @param {Response} cachedResponse
+       * @return {boolean}
+       *
+       * @private
+       */
+
+
+      _isResponseDateFresh(cachedResponse) {
+        if (!this._maxAgeSeconds) {
+          // We aren't expiring by age, so return true, it's fresh
+          return true;
+        } // Check if the 'date' header will suffice a quick expiration check.
+        // See https://github.com/GoogleChromeLabs/sw-toolbox/issues/164 for
+        // discussion.
+
+
+        const dateHeaderTimestamp = this._getDateHeaderTimestamp(cachedResponse);
+
+        if (dateHeaderTimestamp === null) {
+          // Unable to parse date, so assume it's fresh.
+          return true;
+        } // If we have a valid headerTime, then our response is fresh iff the
+        // headerTime plus maxAgeSeconds is greater than the current time.
+
+
+        const now = Date.now();
+        return dateHeaderTimestamp >= now - this._maxAgeSeconds * 1000;
+      }
+      /**
+       * This method will extract the data header and parse it into a useful
+       * value.
+       *
+       * @param {Response} cachedResponse
+       * @return {number|null}
+       *
+       * @private
+       */
+
+
+      _getDateHeaderTimestamp(cachedResponse) {
+        if (!cachedResponse.headers.has('date')) {
+          return null;
+        }
+
+        const dateHeader = cachedResponse.headers.get('date');
+        const parsedDate = new Date(dateHeader);
+        const headerTime = parsedDate.getTime(); // If the Date header was invalid for some reason, parsedDate.getTime()
+        // will return NaN.
+
+        if (isNaN(headerTime)) {
+          return null;
+        }
+
+        return headerTime;
+      }
+      /**
+       * This is a helper method that performs two operations:
+       *
+       * - Deletes *all* the underlying Cache instances associated with this plugin
+       * instance, by calling caches.delete() on your behalf.
+       * - Deletes the metadata from IndexedDB used to keep track of expiration
+       * details for each Cache instance.
+       *
+       * When using cache expiration, calling this method is preferable to calling
+       * `caches.delete()` directly, since this will ensure that the IndexedDB
+       * metadata is also cleanly removed and open IndexedDB instances are deleted.
+       *
+       * Note that if you're *not* using cache expiration for a given cache, calling
+       * `caches.delete()` and passing in the cache's name should be sufficient.
+       * There is no Workbox-specific method needed for cleanup in that case.
+       */
+
+
+      async deleteCacheAndMetadata() {
+        // Do this one at a time instead of all at once via `Promise.all()` to
+        // reduce the chance of inconsistency if a promise rejects.
+        for (const [cacheName, cacheExpiration] of this._cacheExpirations) {
+          await self.caches.delete(cacheName);
+          await cacheExpiration.delete();
+        } // Reset this._cacheExpirations to its initial state.
+
+
+        this._cacheExpirations = new Map();
+      }
+
+    }
+
+    exports.CacheExpiration = CacheExpiration;
+    exports.ExpirationPlugin = ExpirationPlugin;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core));
+

source/js/workbox/workbox-expiration.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.expiration=function(t,e,s,i,a,n,h){"use strict";try{self["workbox:expiration:5.1.4"]&&_()}catch(t){}const r=t=>{const e=new URL(t,location.href);return e.hash="",e.href};class c{constructor(t){this.t=t,this.s=new i.DBWrapper("workbox-expiration",1,{onupgradeneeded:t=>this.i(t)})}i(t){const e=t.target.result.createObjectStore("cache-entries",{keyPath:"id"});e.createIndex("cacheName","cacheName",{unique:!1}),e.createIndex("timestamp","timestamp",{unique:!1}),a.deleteDatabase(this.t)}async setTimestamp(t,e){const s={url:t=r(t),timestamp:e,cacheName:this.t,id:this.h(t)};await this.s.put("cache-entries",s)}async getTimestamp(t){return(await this.s.get("cache-entries",this.h(t))).timestamp}async expireEntries(t,e){const s=await this.s.transaction("cache-entries","readwrite",(s,i)=>{const a=s.objectStore("cache-entries").index("timestamp").openCursor(null,"prev"),n=[];let h=0;a.onsuccess=()=>{const s=a.result;if(s){const i=s.value;i.cacheName===this.t&&(t&&i.timestamp<t||e&&h>=e?n.push(s.value):h++),s.continue()}else i(n)}}),i=[];for(const t of s)await this.s.delete("cache-entries",t.id),i.push(t.url);return i}h(t){return this.t+"|"+r(t)}}class o{constructor(t,e={}){this.o=!1,this.u=!1,this.l=e.maxEntries,this.m=e.maxAgeSeconds,this.t=t,this.p=new c(t)}async expireEntries(){if(this.o)return void(this.u=!0);this.o=!0;const t=this.m?Date.now()-1e3*this.m:0,s=await this.p.expireEntries(t,this.l),i=await self.caches.open(this.t);for(const t of s)await i.delete(t);this.o=!1,this.u&&(this.u=!1,e.dontWaitFor(this.expireEntries()))}async updateTimestamp(t){await this.p.setTimestamp(t,Date.now())}async isURLExpired(t){if(this.m){return await this.p.getTimestamp(t)<Date.now()-1e3*this.m}return!1}async delete(){this.u=!1,await this.p.expireEntries(1/0)}}return t.CacheExpiration=o,t.ExpirationPlugin=class{constructor(t={}){this.cachedResponseWillBeUsed=async({event:t,request:s,cacheName:i,cachedResponse:a})=>{if(!a)return null;const n=this.k(a),h=this.D(i);e.dontWaitFor(h.expireEntries());const r=h.updateTimestamp(s.url);if(t)try{t.waitUntil(r)}catch(t){}return n?a:null},this.cacheDidUpdate=async({cacheName:t,request:e})=>{const s=this.D(t);await s.updateTimestamp(e.url),await s.expireEntries()},this.N=t,this.m=t.maxAgeSeconds,this.g=new Map,t.purgeOnQuotaError&&h.registerQuotaErrorCallback(()=>this.deleteCacheAndMetadata())}D(t){if(t===n.cacheNames.getRuntimeName())throw new s.WorkboxError("expire-custom-caches-only");let e=this.g.get(t);return e||(e=new o(t,this.N),this.g.set(t,e)),e}k(t){if(!this.m)return!0;const e=this._(t);if(null===e)return!0;return e>=Date.now()-1e3*this.m}_(t){if(!t.headers.has("date"))return null;const e=t.headers.get("date"),s=new Date(e).getTime();return isNaN(s)?null:s}async deleteCacheAndMetadata(){for(const[t,e]of this.g)await self.caches.delete(t),await e.delete();this.g=new Map}},t}({},workbox.core._private,workbox.core._private,workbox.core._private,workbox.core._private,workbox.core._private,workbox.core);
+

source/js/workbox/workbox-navigation-preload.dev.js

@@ -0,0 +1,102 @@
+this.workbox = this.workbox || {};
+this.workbox.navigationPreload = (function (exports, logger_js) {
+    'use strict';
+
+    try {
+      self['workbox:navigation-preload:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * @return {boolean} Whether or not the current browser supports enabling
+     * navigation preload.
+     *
+     * @memberof module:workbox-navigation-preload
+     */
+
+    function isSupported() {
+      return Boolean(self.registration && self.registration.navigationPreload);
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * If the browser supports Navigation Preload, then this will disable it.
+     *
+     * @memberof module:workbox-navigation-preload
+     */
+
+    function disable() {
+      if (isSupported()) {
+        self.addEventListener('activate', event => {
+          event.waitUntil(self.registration.navigationPreload.disable().then(() => {
+            {
+              logger_js.logger.log(`Navigation preload is disabled.`);
+            }
+          }));
+        });
+      } else {
+        {
+          logger_js.logger.log(`Navigation preload is not supported in this browser.`);
+        }
+      }
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * If the browser supports Navigation Preload, then this will enable it.
+     *
+     * @param {string} [headerValue] Optionally, allows developers to
+     * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
+     * the value of the `Service-Worker-Navigation-Preload` header which will be
+     * sent to the server when making the navigation request.
+     *
+     * @memberof module:workbox-navigation-preload
+     */
+
+    function enable(headerValue) {
+      if (isSupported()) {
+        self.addEventListener('activate', event => {
+          event.waitUntil(self.registration.navigationPreload.enable().then(() => {
+            // Defaults to Service-Worker-Navigation-Preload: true if not set.
+            if (headerValue) {
+              self.registration.navigationPreload.setHeaderValue(headerValue);
+            }
+
+            {
+              logger_js.logger.log(`Navigation preload is enabled.`);
+            }
+          }));
+        });
+      } else {
+        {
+          logger_js.logger.log(`Navigation preload is not supported in this browser.`);
+        }
+      }
+    }
+
+    exports.disable = disable;
+    exports.enable = enable;
+    exports.isSupported = isSupported;
+
+    return exports;
+
+}({}, workbox.core._private));
+

source/js/workbox/workbox-navigation-preload.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.navigationPreload=function(t){"use strict";try{self["workbox:navigation-preload:5.1.4"]&&_()}catch(t){}function e(){return Boolean(self.registration&&self.registration.navigationPreload)}return t.disable=function(){e()&&self.addEventListener("activate",t=>{t.waitUntil(self.registration.navigationPreload.disable().then(()=>{}))})},t.enable=function(t){e()&&self.addEventListener("activate",e=>{e.waitUntil(self.registration.navigationPreload.enable().then(()=>{t&&self.registration.navigationPreload.setHeaderValue(t)}))})},t.isSupported=e,t}({});
+

source/js/workbox/workbox-offline-ga.dev.js

@@ -0,0 +1,235 @@
+this.workbox = this.workbox || {};
+this.workbox.googleAnalytics = (function (exports, BackgroundSyncPlugin_js, cacheNames_js, getFriendlyURL_js, logger_js, Route_js, Router_js, NetworkFirst_js, NetworkOnly_js) {
+    'use strict';
+
+    try {
+      self['workbox:google-analytics:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    const QUEUE_NAME = 'workbox-google-analytics';
+    const MAX_RETENTION_TIME = 60 * 48; // Two days in minutes
+
+    const GOOGLE_ANALYTICS_HOST = 'www.google-analytics.com';
+    const GTM_HOST = 'www.googletagmanager.com';
+    const ANALYTICS_JS_PATH = '/analytics.js';
+    const GTAG_JS_PATH = '/gtag/js';
+    const GTM_JS_PATH = '/gtm.js';
+    // endpoints. Most of the time the default path (/collect) is used, but
+    // occasionally an experimental endpoint is used when testing new features,
+    // (e.g. /r/collect or /j/collect)
+
+    const COLLECT_PATHS_REGEX = /^\/(\w+\/)?collect/;
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * Creates the requestWillDequeue callback to be used with the background
+     * sync plugin. The callback takes the failed request and adds the
+     * `qt` param based on the current time, as well as applies any other
+     * user-defined hit modifications.
+     *
+     * @param {Object} config See {@link module:workbox-google-analytics.initialize}.
+     * @return {Function} The requestWillDequeue callback function.
+     *
+     * @private
+     */
+
+    const createOnSyncCallback = config => {
+      return async ({
+        queue
+      }) => {
+        let entry;
+
+        while (entry = await queue.shiftRequest()) {
+          const {
+            request,
+            timestamp
+          } = entry;
+          const url = new URL(request.url);
+
+          try {
+            // Measurement protocol requests can set their payload parameters in
+            // either the URL query string (for GET requests) or the POST body.
+            const params = request.method === 'POST' ? new URLSearchParams(await request.clone().text()) : url.searchParams; // Calculate the qt param, accounting for the fact that an existing
+            // qt param may be present and should be updated rather than replaced.
+
+            const originalHitTime = timestamp - (Number(params.get('qt')) || 0);
+            const queueTime = Date.now() - originalHitTime; // Set the qt param prior to applying hitFilter or parameterOverrides.
+
+            params.set('qt', String(queueTime)); // Apply `parameterOverrides`, if set.
+
+            if (config.parameterOverrides) {
+              for (const param of Object.keys(config.parameterOverrides)) {
+                const value = config.parameterOverrides[param];
+                params.set(param, value);
+              }
+            } // Apply `hitFilter`, if set.
+
+
+            if (typeof config.hitFilter === 'function') {
+              config.hitFilter.call(null, params);
+            } // Retry the fetch. Ignore URL search params from the URL as they're
+            // now in the post body.
+
+
+            await fetch(new Request(url.origin + url.pathname, {
+              body: params.toString(),
+              method: 'POST',
+              mode: 'cors',
+              credentials: 'omit',
+              headers: {
+                'Content-Type': 'text/plain'
+              }
+            }));
+
+            if ("dev" !== 'production') {
+              logger_js.logger.log(`Request for '${getFriendlyURL_js.getFriendlyURL(url.href)}'` + `has been replayed`);
+            }
+          } catch (err) {
+            await queue.unshiftRequest(entry);
+
+            {
+              logger_js.logger.log(`Request for '${getFriendlyURL_js.getFriendlyURL(url.href)}'` + `failed to replay, putting it back in the queue.`);
+            }
+
+            throw err;
+          }
+        }
+
+        {
+          logger_js.logger.log(`All Google Analytics request successfully replayed; ` + `the queue is now empty!`);
+        }
+      };
+    };
+    /**
+     * Creates GET and POST routes to catch failed Measurement Protocol hits.
+     *
+     * @param {BackgroundSyncPlugin} bgSyncPlugin
+     * @return {Array<Route>} The created routes.
+     *
+     * @private
+     */
+
+
+    const createCollectRoutes = bgSyncPlugin => {
+      const match = ({
+        url
+      }) => url.hostname === GOOGLE_ANALYTICS_HOST && COLLECT_PATHS_REGEX.test(url.pathname);
+
+      const handler = new NetworkOnly_js.NetworkOnly({
+        plugins: [bgSyncPlugin]
+      });
+      return [new Route_js.Route(match, handler, 'GET'), new Route_js.Route(match, handler, 'POST')];
+    };
+    /**
+     * Creates a route with a network first strategy for the analytics.js script.
+     *
+     * @param {string} cacheName
+     * @return {Route} The created route.
+     *
+     * @private
+     */
+
+
+    const createAnalyticsJsRoute = cacheName => {
+      const match = ({
+        url
+      }) => url.hostname === GOOGLE_ANALYTICS_HOST && url.pathname === ANALYTICS_JS_PATH;
+
+      const handler = new NetworkFirst_js.NetworkFirst({
+        cacheName
+      });
+      return new Route_js.Route(match, handler, 'GET');
+    };
+    /**
+     * Creates a route with a network first strategy for the gtag.js script.
+     *
+     * @param {string} cacheName
+     * @return {Route} The created route.
+     *
+     * @private
+     */
+
+
+    const createGtagJsRoute = cacheName => {
+      const match = ({
+        url
+      }) => url.hostname === GTM_HOST && url.pathname === GTAG_JS_PATH;
+
+      const handler = new NetworkFirst_js.NetworkFirst({
+        cacheName
+      });
+      return new Route_js.Route(match, handler, 'GET');
+    };
+    /**
+     * Creates a route with a network first strategy for the gtm.js script.
+     *
+     * @param {string} cacheName
+     * @return {Route} The created route.
+     *
+     * @private
+     */
+
+
+    const createGtmJsRoute = cacheName => {
+      const match = ({
+        url
+      }) => url.hostname === GTM_HOST && url.pathname === GTM_JS_PATH;
+
+      const handler = new NetworkFirst_js.NetworkFirst({
+        cacheName
+      });
+      return new Route_js.Route(match, handler, 'GET');
+    };
+    /**
+     * @param {Object=} [options]
+     * @param {Object} [options.cacheName] The cache name to store and retrieve
+     *     analytics.js. Defaults to the cache names provided by `workbox-core`.
+     * @param {Object} [options.parameterOverrides]
+     *     [Measurement Protocol parameters](https://developers.google.com/analytics/devguides/collection/protocol/v1/parameters),
+     *     expressed as key/value pairs, to be added to replayed Google Analytics
+     *     requests. This can be used to, e.g., set a custom dimension indicating
+     *     that the request was replayed.
+     * @param {Function} [options.hitFilter] A function that allows you to modify
+     *     the hit parameters prior to replaying
+     *     the hit. The function is invoked with the original hit's URLSearchParams
+     *     object as its only argument.
+     *
+     * @memberof module:workbox-google-analytics
+     */
+
+
+    const initialize = (options = {}) => {
+      const cacheName = cacheNames_js.cacheNames.getGoogleAnalyticsName(options.cacheName);
+      const bgSyncPlugin = new BackgroundSyncPlugin_js.BackgroundSyncPlugin(QUEUE_NAME, {
+        maxRetentionTime: MAX_RETENTION_TIME,
+        onSync: createOnSyncCallback(options)
+      });
+      const routes = [createGtmJsRoute(cacheName), createAnalyticsJsRoute(cacheName), createGtagJsRoute(cacheName), ...createCollectRoutes(bgSyncPlugin)];
+      const router = new Router_js.Router();
+
+      for (const route of routes) {
+        router.registerRoute(route);
+      }
+
+      router.addFetchListener();
+    };
+
+    exports.initialize = initialize;
+
+    return exports;
+
+}({}, workbox.backgroundSync, workbox.core._private, workbox.core._private, workbox.core._private, workbox.routing, workbox.routing, workbox.strategies, workbox.strategies));
+

source/js/workbox/workbox-offline-ga.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.googleAnalytics=function(t,o,e,n,a,c,r,w,s){"use strict";try{self["workbox:google-analytics:5.1.4"]&&_()}catch(t){}const i=/^\/(\w+\/)?collect/,l=t=>{const o=({url:t})=>"www.google-analytics.com"===t.hostname&&i.test(t.pathname),e=new s.NetworkOnly({plugins:[t]});return[new c.Route(o,e,"GET"),new c.Route(o,e,"POST")]},g=t=>{const o=new w.NetworkFirst({cacheName:t});return new c.Route(({url:t})=>"www.google-analytics.com"===t.hostname&&"/analytics.js"===t.pathname,o,"GET")},m=t=>{const o=new w.NetworkFirst({cacheName:t});return new c.Route(({url:t})=>"www.googletagmanager.com"===t.hostname&&"/gtag/js"===t.pathname,o,"GET")},u=t=>{const o=new w.NetworkFirst({cacheName:t});return new c.Route(({url:t})=>"www.googletagmanager.com"===t.hostname&&"/gtm.js"===t.pathname,o,"GET")};return t.initialize=(t={})=>{const n=e.cacheNames.getGoogleAnalyticsName(t.cacheName),a=new o.BackgroundSyncPlugin("workbox-google-analytics",{maxRetentionTime:2880,onSync:(c=t,async({queue:t})=>{let o;for(;o=await t.shiftRequest();){const{request:e,timestamp:n}=o,a=new URL(e.url);try{const t="POST"===e.method?new URLSearchParams(await e.clone().text()):a.searchParams,o=n-(Number(t.get("qt"))||0),r=Date.now()-o;if(t.set("qt",String(r)),c.parameterOverrides)for(const o of Object.keys(c.parameterOverrides)){const e=c.parameterOverrides[o];t.set(o,e)}"function"==typeof c.hitFilter&&c.hitFilter.call(null,t),await fetch(new Request(a.origin+a.pathname,{body:t.toString(),method:"POST",mode:"cors",credentials:"omit",headers:{"Content-Type":"text/plain"}}))}catch(e){throw await t.unshiftRequest(o),e}}})});var c;const w=[u(n),g(n),m(n),...l(a)],s=new r.Router;for(const t of w)s.registerRoute(t);s.addFetchListener()},t}({},workbox.backgroundSync,workbox.core._private,workbox.core._private,workbox.core._private,workbox.routing,workbox.routing,workbox.strategies,workbox.strategies);
+

source/js/workbox/workbox-range-requests.dev.js

@@ -0,0 +1,262 @@
+this.workbox = this.workbox || {};
+this.workbox.rangeRequests = (function (exports, WorkboxError_js, assert_js, logger_js) {
+    'use strict';
+
+    try {
+      self['workbox:range-requests:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * @param {Blob} blob A source blob.
+     * @param {number} [start] The offset to use as the start of the
+     * slice.
+     * @param {number} [end] The offset to use as the end of the slice.
+     * @return {Object} An object with `start` and `end` properties, reflecting
+     * the effective boundaries to use given the size of the blob.
+     *
+     * @private
+     */
+
+    function calculateEffectiveBoundaries(blob, start, end) {
+      {
+        assert_js.assert.isInstance(blob, Blob, {
+          moduleName: 'workbox-range-requests',
+          funcName: 'calculateEffectiveBoundaries',
+          paramName: 'blob'
+        });
+      }
+
+      const blobSize = blob.size;
+
+      if (end && end > blobSize || start && start < 0) {
+        throw new WorkboxError_js.WorkboxError('range-not-satisfiable', {
+          size: blobSize,
+          end,
+          start
+        });
+      }
+
+      let effectiveStart;
+      let effectiveEnd;
+
+      if (start !== undefined && end !== undefined) {
+        effectiveStart = start; // Range values are inclusive, so add 1 to the value.
+
+        effectiveEnd = end + 1;
+      } else if (start !== undefined && end === undefined) {
+        effectiveStart = start;
+        effectiveEnd = blobSize;
+      } else if (end !== undefined && start === undefined) {
+        effectiveStart = blobSize - end;
+        effectiveEnd = blobSize;
+      }
+
+      return {
+        start: effectiveStart,
+        end: effectiveEnd
+      };
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * @param {string} rangeHeader A Range: header value.
+     * @return {Object} An object with `start` and `end` properties, reflecting
+     * the parsed value of the Range: header. If either the `start` or `end` are
+     * omitted, then `null` will be returned.
+     *
+     * @private
+     */
+
+    function parseRangeHeader(rangeHeader) {
+      {
+        assert_js.assert.isType(rangeHeader, 'string', {
+          moduleName: 'workbox-range-requests',
+          funcName: 'parseRangeHeader',
+          paramName: 'rangeHeader'
+        });
+      }
+
+      const normalizedRangeHeader = rangeHeader.trim().toLowerCase();
+
+      if (!normalizedRangeHeader.startsWith('bytes=')) {
+        throw new WorkboxError_js.WorkboxError('unit-must-be-bytes', {
+          normalizedRangeHeader
+        });
+      } // Specifying multiple ranges separate by commas is valid syntax, but this
+      // library only attempts to handle a single, contiguous sequence of bytes.
+      // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Range#Syntax
+
+
+      if (normalizedRangeHeader.includes(',')) {
+        throw new WorkboxError_js.WorkboxError('single-range-only', {
+          normalizedRangeHeader
+        });
+      }
+
+      const rangeParts = /(\d*)-(\d*)/.exec(normalizedRangeHeader); // We need either at least one of the start or end values.
+
+      if (!rangeParts || !(rangeParts[1] || rangeParts[2])) {
+        throw new WorkboxError_js.WorkboxError('invalid-range-values', {
+          normalizedRangeHeader
+        });
+      }
+
+      return {
+        start: rangeParts[1] === '' ? undefined : Number(rangeParts[1]),
+        end: rangeParts[2] === '' ? undefined : Number(rangeParts[2])
+      };
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * Given a `Request` and `Response` objects as input, this will return a
+     * promise for a new `Response`.
+     *
+     * If the original `Response` already contains partial content (i.e. it has
+     * a status of 206), then this assumes it already fulfills the `Range:`
+     * requirements, and will return it as-is.
+     *
+     * @param {Request} request A request, which should contain a Range:
+     * header.
+     * @param {Response} originalResponse A response.
+     * @return {Promise<Response>} Either a `206 Partial Content` response, with
+     * the response body set to the slice of content specified by the request's
+     * `Range:` header, or a `416 Range Not Satisfiable` response if the
+     * conditions of the `Range:` header can't be met.
+     *
+     * @memberof module:workbox-range-requests
+     */
+
+    async function createPartialResponse(request, originalResponse) {
+      try {
+        if ("dev" !== 'production') {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-range-requests',
+            funcName: 'createPartialResponse',
+            paramName: 'request'
+          });
+          assert_js.assert.isInstance(originalResponse, Response, {
+            moduleName: 'workbox-range-requests',
+            funcName: 'createPartialResponse',
+            paramName: 'originalResponse'
+          });
+        }
+
+        if (originalResponse.status === 206) {
+          // If we already have a 206, then just pass it through as-is;
+          // see https://github.com/GoogleChrome/workbox/issues/1720
+          return originalResponse;
+        }
+
+        const rangeHeader = request.headers.get('range');
+
+        if (!rangeHeader) {
+          throw new WorkboxError_js.WorkboxError('no-range-header');
+        }
+
+        const boundaries = parseRangeHeader(rangeHeader);
+        const originalBlob = await originalResponse.blob();
+        const effectiveBoundaries = calculateEffectiveBoundaries(originalBlob, boundaries.start, boundaries.end);
+        const slicedBlob = originalBlob.slice(effectiveBoundaries.start, effectiveBoundaries.end);
+        const slicedBlobSize = slicedBlob.size;
+        const slicedResponse = new Response(slicedBlob, {
+          // Status code 206 is for a Partial Content response.
+          // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/206
+          status: 206,
+          statusText: 'Partial Content',
+          headers: originalResponse.headers
+        });
+        slicedResponse.headers.set('Content-Length', String(slicedBlobSize));
+        slicedResponse.headers.set('Content-Range', `bytes ${effectiveBoundaries.start}-${effectiveBoundaries.end - 1}/` + originalBlob.size);
+        return slicedResponse;
+      } catch (error) {
+        {
+          logger_js.logger.warn(`Unable to construct a partial response; returning a ` + `416 Range Not Satisfiable response instead.`);
+          logger_js.logger.groupCollapsed(`View details here.`);
+          logger_js.logger.log(error);
+          logger_js.logger.log(request);
+          logger_js.logger.log(originalResponse);
+          logger_js.logger.groupEnd();
+        }
+
+        return new Response('', {
+          status: 416,
+          statusText: 'Range Not Satisfiable'
+        });
+      }
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * The range request plugin makes it easy for a request with a 'Range' header to
+     * be fulfilled by a cached response.
+     *
+     * It does this by intercepting the `cachedResponseWillBeUsed` plugin callback
+     * and returning the appropriate subset of the cached response body.
+     *
+     * @memberof module:workbox-range-requests
+     */
+
+    class RangeRequestsPlugin {
+      constructor() {
+        /**
+         * @param {Object} options
+         * @param {Request} options.request The original request, which may or may not
+         * contain a Range: header.
+         * @param {Response} options.cachedResponse The complete cached response.
+         * @return {Promise<Response>} If request contains a 'Range' header, then a
+         * new response with status 206 whose body is a subset of `cachedResponse` is
+         * returned. Otherwise, `cachedResponse` is returned as-is.
+         *
+         * @private
+         */
+        this.cachedResponseWillBeUsed = async ({
+          request,
+          cachedResponse
+        }) => {
+          // Only return a sliced response if there's something valid in the cache,
+          // and there's a Range: header in the request.
+          if (cachedResponse && request.headers.has('range')) {
+            return await createPartialResponse(request, cachedResponse);
+          } // If there was no Range: header, or if cachedResponse wasn't valid, just
+          // pass it through as-is.
+
+
+          return cachedResponse;
+        };
+      }
+
+    }
+
+    exports.RangeRequestsPlugin = RangeRequestsPlugin;
+    exports.createPartialResponse = createPartialResponse;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-range-requests.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.rangeRequests=function(t,e,n){"use strict";try{self["workbox:range-requests:5.1.4"]&&_()}catch(t){}async function r(t,n){try{if(206===n.status)return n;const r=t.headers.get("range");if(!r)throw new e.WorkboxError("no-range-header");const s=function(t){const n=t.trim().toLowerCase();if(!n.startsWith("bytes="))throw new e.WorkboxError("unit-must-be-bytes",{normalizedRangeHeader:n});if(n.includes(","))throw new e.WorkboxError("single-range-only",{normalizedRangeHeader:n});const r=/(\d*)-(\d*)/.exec(n);if(!r||!r[1]&&!r[2])throw new e.WorkboxError("invalid-range-values",{normalizedRangeHeader:n});return{start:""===r[1]?void 0:Number(r[1]),end:""===r[2]?void 0:Number(r[2])}}(r),a=await n.blob(),o=function(t,n,r){const s=t.size;if(r&&r>s||n&&n<0)throw new e.WorkboxError("range-not-satisfiable",{size:s,end:r,start:n});let a,o;return void 0!==n&&void 0!==r?(a=n,o=r+1):void 0!==n&&void 0===r?(a=n,o=s):void 0!==r&&void 0===n&&(a=s-r,o=s),{start:a,end:o}}(a,s.start,s.end),i=a.slice(o.start,o.end),d=i.size,u=new Response(i,{status:206,statusText:"Partial Content",headers:n.headers});return u.headers.set("Content-Length",String(d)),u.headers.set("Content-Range",`bytes ${o.start}-${o.end-1}/`+a.size),u}catch(t){return new Response("",{status:416,statusText:"Range Not Satisfiable"})}}return t.RangeRequestsPlugin=class{constructor(){this.cachedResponseWillBeUsed=async({request:t,cachedResponse:e})=>e&&t.headers.has("range")?await r(t,e):e}},t.createPartialResponse=r,t}({},workbox.core._private,workbox.core._private);
+

source/js/workbox/workbox-routing.dev.js

@@ -0,0 +1,923 @@
+this.workbox = this.workbox || {};
+this.workbox.routing = (function (exports, assert_js, logger_js, WorkboxError_js, getFriendlyURL_js) {
+    'use strict';
+
+    try {
+      self['workbox:routing:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * The default HTTP method, 'GET', used when there's no specific method
+     * configured for a route.
+     *
+     * @type {string}
+     *
+     * @private
+     */
+
+    const defaultMethod = 'GET';
+    /**
+     * The list of valid HTTP methods associated with requests that could be routed.
+     *
+     * @type {Array<string>}
+     *
+     * @private
+     */
+
+    const validMethods = ['DELETE', 'GET', 'HEAD', 'PATCH', 'POST', 'PUT'];
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * @param {function()|Object} handler Either a function, or an object with a
+     * 'handle' method.
+     * @return {Object} An object with a handle method.
+     *
+     * @private
+     */
+
+    const normalizeHandler = handler => {
+      if (handler && typeof handler === 'object') {
+        {
+          assert_js.assert.hasMethod(handler, 'handle', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'handler'
+          });
+        }
+
+        return handler;
+      } else {
+        {
+          assert_js.assert.isType(handler, 'function', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'handler'
+          });
+        }
+
+        return {
+          handle: handler
+        };
+      }
+    };
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * A `Route` consists of a pair of callback functions, "match" and "handler".
+     * The "match" callback determine if a route should be used to "handle" a
+     * request by returning a non-falsy value if it can. The "handler" callback
+     * is called when there is a match and should return a Promise that resolves
+     * to a `Response`.
+     *
+     * @memberof module:workbox-routing
+     */
+
+    class Route {
+      /**
+       * Constructor for Route class.
+       *
+       * @param {module:workbox-routing~matchCallback} match
+       * A callback function that determines whether the route matches a given
+       * `fetch` event by returning a non-falsy value.
+       * @param {module:workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resolving to a Response.
+       * @param {string} [method='GET'] The HTTP method to match the Route
+       * against.
+       */
+      constructor(match, handler, method = defaultMethod) {
+        {
+          assert_js.assert.isType(match, 'function', {
+            moduleName: 'workbox-routing',
+            className: 'Route',
+            funcName: 'constructor',
+            paramName: 'match'
+          });
+
+          if (method) {
+            assert_js.assert.isOneOf(method, validMethods, {
+              paramName: 'method'
+            });
+          }
+        } // These values are referenced directly by Router so cannot be
+        // altered by minificaton.
+
+
+        this.handler = normalizeHandler(handler);
+        this.match = match;
+        this.method = method;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * NavigationRoute makes it easy to create a
+     * [Route]{@link module:workbox-routing.Route} that matches for browser
+     * [navigation requests]{@link https://developers.google.com/web/fundamentals/primers/service-workers/high-performance-loading#first_what_are_navigation_requests}.
+     *
+     * It will only match incoming Requests whose
+     * [`mode`]{@link https://fetch.spec.whatwg.org/#concept-request-mode}
+     * is set to `navigate`.
+     *
+     * You can optionally only apply this route to a subset of navigation requests
+     * by using one or both of the `denylist` and `allowlist` parameters.
+     *
+     * @memberof module:workbox-routing
+     * @extends module:workbox-routing.Route
+     */
+
+    class NavigationRoute extends Route {
+      /**
+       * If both `denylist` and `allowlist` are provided, the `denylist` will
+       * take precedence and the request will not match this route.
+       *
+       * The regular expressions in `allowlist` and `denylist`
+       * are matched against the concatenated
+       * [`pathname`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/pathname}
+       * and [`search`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search}
+       * portions of the requested URL.
+       *
+       * @param {module:workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       * @param {Object} options
+       * @param {Array<RegExp>} [options.denylist] If any of these patterns match,
+       * the route will not handle the request (even if a allowlist RegExp matches).
+       * @param {Array<RegExp>} [options.allowlist=[/./]] If any of these patterns
+       * match the URL's pathname and search parameter, the route will handle the
+       * request (assuming the denylist doesn't match).
+       */
+      constructor(handler, {
+        allowlist = [/./],
+        denylist = []
+      } = {}) {
+        {
+          assert_js.assert.isArrayOfClass(allowlist, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'NavigationRoute',
+            funcName: 'constructor',
+            paramName: 'options.allowlist'
+          });
+          assert_js.assert.isArrayOfClass(denylist, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'NavigationRoute',
+            funcName: 'constructor',
+            paramName: 'options.denylist'
+          });
+        }
+
+        super(options => this._match(options), handler);
+        this._allowlist = allowlist;
+        this._denylist = denylist;
+      }
+      /**
+       * Routes match handler.
+       *
+       * @param {Object} options
+       * @param {URL} options.url
+       * @param {Request} options.request
+       * @return {boolean}
+       *
+       * @private
+       */
+
+
+      _match({
+        url,
+        request
+      }) {
+        if (request && request.mode !== 'navigate') {
+          return false;
+        }
+
+        const pathnameAndSearch = url.pathname + url.search;
+
+        for (const regExp of this._denylist) {
+          if (regExp.test(pathnameAndSearch)) {
+            {
+              logger_js.logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL matches this denylist pattern: ` + `${regExp}`);
+            }
+
+            return false;
+          }
+        }
+
+        if (this._allowlist.some(regExp => regExp.test(pathnameAndSearch))) {
+          {
+            logger_js.logger.debug(`The navigation route ${pathnameAndSearch} ` + `is being used.`);
+          }
+
+          return true;
+        }
+
+        {
+          logger_js.logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL being navigated to doesn't ` + `match the allowlist.`);
+        }
+
+        return false;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * RegExpRoute makes it easy to create a regular expression based
+     * [Route]{@link module:workbox-routing.Route}.
+     *
+     * For same-origin requests the RegExp only needs to match part of the URL. For
+     * requests against third-party servers, you must define a RegExp that matches
+     * the start of the URL.
+     *
+     * [See the module docs for info.]{@link https://developers.google.com/web/tools/workbox/modules/workbox-routing}
+     *
+     * @memberof module:workbox-routing
+     * @extends module:workbox-routing.Route
+     */
+
+    class RegExpRoute extends Route {
+      /**
+       * If the regular expression contains
+       * [capture groups]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#grouping-back-references},
+       * the captured values will be passed to the
+       * [handler's]{@link module:workbox-routing~handlerCallback} `params`
+       * argument.
+       *
+       * @param {RegExp} regExp The regular expression to match against URLs.
+       * @param {module:workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       * @param {string} [method='GET'] The HTTP method to match the Route
+       * against.
+       */
+      constructor(regExp, handler, method) {
+        {
+          assert_js.assert.isInstance(regExp, RegExp, {
+            moduleName: 'workbox-routing',
+            className: 'RegExpRoute',
+            funcName: 'constructor',
+            paramName: 'pattern'
+          });
+        }
+
+        const match = ({
+          url
+        }) => {
+          const result = regExp.exec(url.href); // Return immediately if there's no match.
+
+          if (!result) {
+            return;
+          } // Require that the match start at the first character in the URL string
+          // if it's a cross-origin request.
+          // See https://github.com/GoogleChrome/workbox/issues/281 for the context
+          // behind this behavior.
+
+
+          if (url.origin !== location.origin && result.index !== 0) {
+            {
+              logger_js.logger.debug(`The regular expression '${regExp}' only partially matched ` + `against the cross-origin URL '${url}'. RegExpRoute's will only ` + `handle cross-origin requests if they match the entire URL.`);
+            }
+
+            return;
+          } // If the route matches, but there aren't any capture groups defined, then
+          // this will return [], which is truthy and therefore sufficient to
+          // indicate a match.
+          // If there are capture groups, then it will return their values.
+
+
+          return result.slice(1);
+        };
+
+        super(match, handler, method);
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * The Router can be used to process a FetchEvent through one or more
+     * [Routes]{@link module:workbox-routing.Route} responding  with a Request if
+     * a matching route exists.
+     *
+     * If no route matches a given a request, the Router will use a "default"
+     * handler if one is defined.
+     *
+     * Should the matching Route throw an error, the Router will use a "catch"
+     * handler if one is defined to gracefully deal with issues and respond with a
+     * Request.
+     *
+     * If a request matches multiple routes, the **earliest** registered route will
+     * be used to respond to the request.
+     *
+     * @memberof module:workbox-routing
+     */
+
+    class Router {
+      /**
+       * Initializes a new Router.
+       */
+      constructor() {
+        this._routes = new Map();
+      }
+      /**
+       * @return {Map<string, Array<module:workbox-routing.Route>>} routes A `Map` of HTTP
+       * method name ('GET', etc.) to an array of all the corresponding `Route`
+       * instances that are registered.
+       */
+
+
+      get routes() {
+        return this._routes;
+      }
+      /**
+       * Adds a fetch event listener to respond to events when a route matches
+       * the event's request.
+       */
+
+
+      addFetchListener() {
+        // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+        self.addEventListener('fetch', event => {
+          const {
+            request
+          } = event;
+          const responsePromise = this.handleRequest({
+            request,
+            event
+          });
+
+          if (responsePromise) {
+            event.respondWith(responsePromise);
+          }
+        });
+      }
+      /**
+       * Adds a message event listener for URLs to cache from the window.
+       * This is useful to cache resources loaded on the page prior to when the
+       * service worker started controlling it.
+       *
+       * The format of the message data sent from the window should be as follows.
+       * Where the `urlsToCache` array may consist of URL strings or an array of
+       * URL string + `requestInit` object (the same as you'd pass to `fetch()`).
+       *
+       * ```
+       * {
+       *   type: 'CACHE_URLS',
+       *   payload: {
+       *     urlsToCache: [
+       *       './script1.js',
+       *       './script2.js',
+       *       ['./script3.js', {mode: 'no-cors'}],
+       *     ],
+       *   },
+       * }
+       * ```
+       */
+
+
+      addCacheListener() {
+        // See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
+        self.addEventListener('message', event => {
+          if (event.data && event.data.type === 'CACHE_URLS') {
+            const {
+              payload
+            } = event.data;
+
+            {
+              logger_js.logger.debug(`Caching URLs from the window`, payload.urlsToCache);
+            }
+
+            const requestPromises = Promise.all(payload.urlsToCache.map(entry => {
+              if (typeof entry === 'string') {
+                entry = [entry];
+              }
+
+              const request = new Request(...entry);
+              return this.handleRequest({
+                request
+              }); // TODO(philipwalton): TypeScript errors without this typecast for
+              // some reason (probably a bug). The real type here should work but
+              // doesn't: `Array<Promise<Response> | undefined>`.
+            })); // TypeScript
+
+            event.waitUntil(requestPromises); // If a MessageChannel was used, reply to the message on success.
+
+            if (event.ports && event.ports[0]) {
+              requestPromises.then(() => event.ports[0].postMessage(true));
+            }
+          }
+        });
+      }
+      /**
+       * Apply the routing rules to a FetchEvent object to get a Response from an
+       * appropriate Route's handler.
+       *
+       * @param {Object} options
+       * @param {Request} options.request The request to handle (this is usually
+       *     from a fetch event, but it does not have to be).
+       * @param {FetchEvent} [options.event] The event that triggered the request,
+       *     if applicable.
+       * @return {Promise<Response>|undefined} A promise is returned if a
+       *     registered route can handle the request. If there is no matching
+       *     route and there's no `defaultHandler`, `undefined` is returned.
+       */
+
+
+      handleRequest({
+        request,
+        event
+      }) {
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'handleRequest',
+            paramName: 'options.request'
+          });
+        }
+
+        const url = new URL(request.url, location.href);
+
+        if (!url.protocol.startsWith('http')) {
+          {
+            logger_js.logger.debug(`Workbox Router only supports URLs that start with 'http'.`);
+          }
+
+          return;
+        }
+
+        const {
+          params,
+          route
+        } = this.findMatchingRoute({
+          url,
+          request,
+          event
+        });
+        let handler = route && route.handler;
+        const debugMessages = [];
+
+        {
+          if (handler) {
+            debugMessages.push([`Found a route to handle this request:`, route]);
+
+            if (params) {
+              debugMessages.push([`Passing the following params to the route's handler:`, params]);
+            }
+          }
+        } // If we don't have a handler because there was no matching route, then
+        // fall back to defaultHandler if that's defined.
+
+
+        if (!handler && this._defaultHandler) {
+          {
+            debugMessages.push(`Failed to find a matching route. Falling ` + `back to the default handler.`);
+          }
+
+          handler = this._defaultHandler;
+        }
+
+        if (!handler) {
+          {
+            // No handler so Workbox will do nothing. If logs is set of debug
+            // i.e. verbose, we should print out this information.
+            logger_js.logger.debug(`No route found for: ${getFriendlyURL_js.getFriendlyURL(url)}`);
+          }
+
+          return;
+        }
+
+        {
+          // We have a handler, meaning Workbox is going to handle the route.
+          // print the routing details to the console.
+          logger_js.logger.groupCollapsed(`Router is responding to: ${getFriendlyURL_js.getFriendlyURL(url)}`);
+          debugMessages.forEach(msg => {
+            if (Array.isArray(msg)) {
+              logger_js.logger.log(...msg);
+            } else {
+              logger_js.logger.log(msg);
+            }
+          });
+          logger_js.logger.groupEnd();
+        } // Wrap in try and catch in case the handle method throws a synchronous
+        // error. It should still callback to the catch handler.
+
+
+        let responsePromise;
+
+        try {
+          responsePromise = handler.handle({
+            url,
+            request,
+            event,
+            params
+          });
+        } catch (err) {
+          responsePromise = Promise.reject(err);
+        }
+
+        if (responsePromise instanceof Promise && this._catchHandler) {
+          responsePromise = responsePromise.catch(err => {
+            {
+              // Still include URL here as it will be async from the console group
+              // and may not make sense without the URL
+              logger_js.logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL_js.getFriendlyURL(url)}. Falling back to Catch Handler.`);
+              logger_js.logger.error(`Error thrown by:`, route);
+              logger_js.logger.error(err);
+              logger_js.logger.groupEnd();
+            }
+
+            return this._catchHandler.handle({
+              url,
+              request,
+              event
+            });
+          });
+        }
+
+        return responsePromise;
+      }
+      /**
+       * Checks a request and URL (and optionally an event) against the list of
+       * registered routes, and if there's a match, returns the corresponding
+       * route along with any params generated by the match.
+       *
+       * @param {Object} options
+       * @param {URL} options.url
+       * @param {Request} options.request The request to match.
+       * @param {Event} [options.event] The corresponding event (unless N/A).
+       * @return {Object} An object with `route` and `params` properties.
+       *     They are populated if a matching route was found or `undefined`
+       *     otherwise.
+       */
+
+
+      findMatchingRoute({
+        url,
+        request,
+        event
+      }) {
+        {
+          assert_js.assert.isInstance(url, URL, {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'findMatchingRoute',
+            paramName: 'options.url'
+          });
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'findMatchingRoute',
+            paramName: 'options.request'
+          });
+        }
+
+        const routes = this._routes.get(request.method) || [];
+
+        for (const route of routes) {
+          let params;
+          const matchResult = route.match({
+            url,
+            request,
+            event
+          });
+
+          if (matchResult) {
+            // See https://github.com/GoogleChrome/workbox/issues/2079
+            params = matchResult;
+
+            if (Array.isArray(matchResult) && matchResult.length === 0) {
+              // Instead of passing an empty array in as params, use undefined.
+              params = undefined;
+            } else if (matchResult.constructor === Object && Object.keys(matchResult).length === 0) {
+              // Instead of passing an empty object in as params, use undefined.
+              params = undefined;
+            } else if (typeof matchResult === 'boolean') {
+              // For the boolean value true (rather than just something truth-y),
+              // don't set params.
+              // See https://github.com/GoogleChrome/workbox/pull/2134#issuecomment-513924353
+              params = undefined;
+            } // Return early if have a match.
+
+
+            return {
+              route,
+              params
+            };
+          }
+        } // If no match was found above, return and empty object.
+
+
+        return {};
+      }
+      /**
+       * Define a default `handler` that's called when no routes explicitly
+       * match the incoming request.
+       *
+       * Without a default handler, unmatched requests will go against the
+       * network as if there were no service worker present.
+       *
+       * @param {module:workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       */
+
+
+      setDefaultHandler(handler) {
+        this._defaultHandler = normalizeHandler(handler);
+      }
+      /**
+       * If a Route throws an error while handling a request, this `handler`
+       * will be called and given a chance to provide a response.
+       *
+       * @param {module:workbox-routing~handlerCallback} handler A callback
+       * function that returns a Promise resulting in a Response.
+       */
+
+
+      setCatchHandler(handler) {
+        this._catchHandler = normalizeHandler(handler);
+      }
+      /**
+       * Registers a route with the router.
+       *
+       * @param {module:workbox-routing.Route} route The route to register.
+       */
+
+
+      registerRoute(route) {
+        {
+          assert_js.assert.isType(route, 'object', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          assert_js.assert.hasMethod(route, 'match', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          assert_js.assert.isType(route.handler, 'object', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route'
+          });
+          assert_js.assert.hasMethod(route.handler, 'handle', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route.handler'
+          });
+          assert_js.assert.isType(route.method, 'string', {
+            moduleName: 'workbox-routing',
+            className: 'Router',
+            funcName: 'registerRoute',
+            paramName: 'route.method'
+          });
+        }
+
+        if (!this._routes.has(route.method)) {
+          this._routes.set(route.method, []);
+        } // Give precedence to all of the earlier routes by adding this additional
+        // route to the end of the array.
+
+
+        this._routes.get(route.method).push(route);
+      }
+      /**
+       * Unregisters a route with the router.
+       *
+       * @param {module:workbox-routing.Route} route The route to unregister.
+       */
+
+
+      unregisterRoute(route) {
+        if (!this._routes.has(route.method)) {
+          throw new WorkboxError_js.WorkboxError('unregister-route-but-not-found-with-method', {
+            method: route.method
+          });
+        }
+
+        const routeIndex = this._routes.get(route.method).indexOf(route);
+
+        if (routeIndex > -1) {
+          this._routes.get(route.method).splice(routeIndex, 1);
+        } else {
+          throw new WorkboxError_js.WorkboxError('unregister-route-route-not-registered');
+        }
+      }
+
+    }
+
+    /*
+      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.
+    */
+    let defaultRouter;
+    /**
+     * Creates a new, singleton Router instance if one does not exist. If one
+     * does already exist, that instance is returned.
+     *
+     * @private
+     * @return {Router}
+     */
+
+    const getOrCreateDefaultRouter = () => {
+      if (!defaultRouter) {
+        defaultRouter = new Router(); // The helpers that use the default Router assume these listeners exist.
+
+        defaultRouter.addFetchListener();
+        defaultRouter.addCacheListener();
+      }
+
+      return defaultRouter;
+    };
+
+    /*
+      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.
+    */
+    /**
+     * Easily register a RegExp, string, or function with a caching
+     * strategy to a singleton Router instance.
+     *
+     * This method will generate a Route for you if needed and
+     * call [registerRoute()]{@link module:workbox-routing.Router#registerRoute}.
+     *
+     * @param {RegExp|string|module:workbox-routing.Route~matchCallback|module:workbox-routing.Route} capture
+     * If the capture param is a `Route`, all other arguments will be ignored.
+     * @param {module:workbox-routing~handlerCallback} [handler] A callback
+     * function that returns a Promise resulting in a Response. This parameter
+     * is required if `capture` is not a `Route` object.
+     * @param {string} [method='GET'] The HTTP method to match the Route
+     * against.
+     * @return {module:workbox-routing.Route} The generated `Route`(Useful for
+     * unregistering).
+     *
+     * @memberof module:workbox-routing
+     */
+
+    function registerRoute(capture, handler, method) {
+      let route;
+
+      if (typeof capture === 'string') {
+        const captureUrl = new URL(capture, location.href);
+
+        {
+          if (!(capture.startsWith('/') || capture.startsWith('http'))) {
+            throw new WorkboxError_js.WorkboxError('invalid-string', {
+              moduleName: 'workbox-routing',
+              funcName: 'registerRoute',
+              paramName: 'capture'
+            });
+          } // We want to check if Express-style wildcards are in the pathname only.
+          // TODO: Remove this log message in v4.
+
+
+          const valueToCheck = capture.startsWith('http') ? captureUrl.pathname : capture; // See https://github.com/pillarjs/path-to-regexp#parameters
+
+          const wildcards = '[*:?+]';
+
+          if (new RegExp(`${wildcards}`).exec(valueToCheck)) {
+            logger_js.logger.debug(`The '$capture' parameter contains an Express-style wildcard ` + `character (${wildcards}). Strings are now always interpreted as ` + `exact matches; use a RegExp for partial or wildcard matches.`);
+          }
+        }
+
+        const matchCallback = ({
+          url
+        }) => {
+          {
+            if (url.pathname === captureUrl.pathname && url.origin !== captureUrl.origin) {
+              logger_js.logger.debug(`${capture} only partially matches the cross-origin URL ` + `${url}. This route will only handle cross-origin requests ` + `if they match the entire URL.`);
+            }
+          }
+
+          return url.href === captureUrl.href;
+        }; // If `capture` is a string then `handler` and `method` must be present.
+
+
+        route = new Route(matchCallback, handler, method);
+      } else if (capture instanceof RegExp) {
+        // If `capture` is a `RegExp` then `handler` and `method` must be present.
+        route = new RegExpRoute(capture, handler, method);
+      } else if (typeof capture === 'function') {
+        // If `capture` is a function then `handler` and `method` must be present.
+        route = new Route(capture, handler, method);
+      } else if (capture instanceof Route) {
+        route = capture;
+      } else {
+        throw new WorkboxError_js.WorkboxError('unsupported-route-type', {
+          moduleName: 'workbox-routing',
+          funcName: 'registerRoute',
+          paramName: 'capture'
+        });
+      }
+
+      const defaultRouter = getOrCreateDefaultRouter();
+      defaultRouter.registerRoute(route);
+      return route;
+    }
+
+    /*
+      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.
+    */
+    /**
+     * If a Route throws an error while handling a request, this `handler`
+     * will be called and given a chance to provide a response.
+     *
+     * @param {module:workbox-routing~handlerCallback} handler A callback
+     * function that returns a Promise resulting in a Response.
+     *
+     * @memberof module:workbox-routing
+     */
+
+    function setCatchHandler(handler) {
+      const defaultRouter = getOrCreateDefaultRouter();
+      defaultRouter.setCatchHandler(handler);
+    }
+
+    /*
+      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.
+    */
+    /**
+     * Define a default `handler` that's called when no routes explicitly
+     * match the incoming request.
+     *
+     * Without a default handler, unmatched requests will go against the
+     * network as if there were no service worker present.
+     *
+     * @param {module:workbox-routing~handlerCallback} handler A callback
+     * function that returns a Promise resulting in a Response.
+     *
+     * @memberof module:workbox-routing
+     */
+
+    function setDefaultHandler(handler) {
+      const defaultRouter = getOrCreateDefaultRouter();
+      defaultRouter.setDefaultHandler(handler);
+    }
+
+    exports.NavigationRoute = NavigationRoute;
+    exports.RegExpRoute = RegExpRoute;
+    exports.Route = Route;
+    exports.Router = Router;
+    exports.registerRoute = registerRoute;
+    exports.setCatchHandler = setCatchHandler;
+    exports.setDefaultHandler = setDefaultHandler;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-routing.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.routing=function(t,e){"use strict";try{self["workbox:routing:5.1.4"]&&_()}catch(t){}const s=t=>t&&"object"==typeof t?t:{handle:t};class r{constructor(t,e,r="GET"){this.handler=s(e),this.match=t,this.method=r}}class n extends r{constructor(t,e,s){super(({url:e})=>{const s=t.exec(e.href);if(s&&(e.origin===location.origin||0===s.index))return s.slice(1)},e,s)}}class o{constructor(){this.t=new Map}get routes(){return this.t}addFetchListener(){self.addEventListener("fetch",t=>{const{request:e}=t,s=this.handleRequest({request:e,event:t});s&&t.respondWith(s)})}addCacheListener(){self.addEventListener("message",t=>{if(t.data&&"CACHE_URLS"===t.data.type){const{payload:e}=t.data,s=Promise.all(e.urlsToCache.map(t=>{"string"==typeof t&&(t=[t]);const e=new Request(...t);return this.handleRequest({request:e})}));t.waitUntil(s),t.ports&&t.ports[0]&&s.then(()=>t.ports[0].postMessage(!0))}})}handleRequest({request:t,event:e}){const s=new URL(t.url,location.href);if(!s.protocol.startsWith("http"))return;const{params:r,route:n}=this.findMatchingRoute({url:s,request:t,event:e});let o,i=n&&n.handler;if(!i&&this.s&&(i=this.s),i){try{o=i.handle({url:s,request:t,event:e,params:r})}catch(t){o=Promise.reject(t)}return o instanceof Promise&&this.o&&(o=o.catch(r=>this.o.handle({url:s,request:t,event:e}))),o}}findMatchingRoute({url:t,request:e,event:s}){const r=this.t.get(e.method)||[];for(const n of r){let r;const o=n.match({url:t,request:e,event:s});if(o)return r=o,(Array.isArray(o)&&0===o.length||o.constructor===Object&&0===Object.keys(o).length||"boolean"==typeof o)&&(r=void 0),{route:n,params:r}}return{}}setDefaultHandler(t){this.s=s(t)}setCatchHandler(t){this.o=s(t)}registerRoute(t){this.t.has(t.method)||this.t.set(t.method,[]),this.t.get(t.method).push(t)}unregisterRoute(t){if(!this.t.has(t.method))throw new e.WorkboxError("unregister-route-but-not-found-with-method",{method:t.method});const s=this.t.get(t.method).indexOf(t);if(!(s>-1))throw new e.WorkboxError("unregister-route-route-not-registered");this.t.get(t.method).splice(s,1)}}let i;const u=()=>(i||(i=new o,i.addFetchListener(),i.addCacheListener()),i);return t.NavigationRoute=class extends r{constructor(t,{allowlist:e=[/./],denylist:s=[]}={}){super(t=>this.i(t),t),this.u=e,this.h=s}i({url:t,request:e}){if(e&&"navigate"!==e.mode)return!1;const s=t.pathname+t.search;for(const t of this.h)if(t.test(s))return!1;return!!this.u.some(t=>t.test(s))}},t.RegExpRoute=n,t.Route=r,t.Router=o,t.registerRoute=function(t,s,o){let i;if("string"==typeof t){const e=new URL(t,location.href);i=new r(({url:t})=>t.href===e.href,s,o)}else if(t instanceof RegExp)i=new n(t,s,o);else if("function"==typeof t)i=new r(t,s,o);else{if(!(t instanceof r))throw new e.WorkboxError("unsupported-route-type",{moduleName:"workbox-routing",funcName:"registerRoute",paramName:"capture"});i=t}return u().registerRoute(i),i},t.setCatchHandler=function(t){u().setCatchHandler(t)},t.setDefaultHandler=function(t){u().setDefaultHandler(t)},t}({},workbox.core._private);
+

source/js/workbox/workbox-strategies.dev.js

@@ -0,0 +1,923 @@
+this.workbox = this.workbox || {};
+this.workbox.strategies = (function (exports, assert_js, cacheNames_js, cacheWrapper_js, fetchWrapper_js, getFriendlyURL_js, logger_js, WorkboxError_js) {
+    'use strict';
+
+    try {
+      self['workbox:strategies:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    const messages = {
+      strategyStart: (strategyName, request) => `Using ${strategyName} to respond to '${getFriendlyURL_js.getFriendlyURL(request.url)}'`,
+      printFinalResponse: response => {
+        if (response) {
+          logger_js.logger.groupCollapsed(`View the final response here.`);
+          logger_js.logger.log(response || '[No response returned]');
+          logger_js.logger.groupEnd();
+        }
+      }
+    };
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * An implementation of a [cache-first]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#cache-falling-back-to-network}
+     * request strategy.
+     *
+     * A cache first strategy is useful for assets that have been revisioned,
+     * such as URLs like `/styles/example.a8f5f1.css`, since they
+     * can be cached for long periods of time.
+     *
+     * If the network request fails, and there is no cache match, this will throw
+     * a `WorkboxError` exception.
+     *
+     * @memberof module:workbox-strategies
+     */
+
+    class CacheFirst {
+      /**
+       * @param {Object} options
+       * @param {string} options.cacheName Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * [workbox-core]{@link module:workbox-core.cacheNames}.
+       * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} options.fetchOptions Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of all fetch() requests made by this strategy.
+       * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
+       */
+      constructor(options = {}) {
+        this._cacheName = cacheNames_js.cacheNames.getRuntimeName(options.cacheName);
+        this._plugins = options.plugins || [];
+        this._fetchOptions = options.fetchOptions;
+        this._matchOptions = options.matchOptions;
+      }
+      /**
+       * This method will perform a request strategy and follows an API that
+       * will work with the
+       * [Workbox Router]{@link module:workbox-routing.Router}.
+       *
+       * @param {Object} options
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {Event} [options.event] The event that triggered the request.
+       * @return {Promise<Response>}
+       */
+
+
+      async handle({
+        event,
+        request
+      }) {
+        const logs = [];
+
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: 'CacheFirst',
+            funcName: 'makeRequest',
+            paramName: 'request'
+          });
+        }
+
+        let response = await cacheWrapper_js.cacheWrapper.match({
+          cacheName: this._cacheName,
+          request,
+          event,
+          matchOptions: this._matchOptions,
+          plugins: this._plugins
+        });
+        let error;
+
+        if (!response) {
+          {
+            logs.push(`No response found in the '${this._cacheName}' cache. ` + `Will respond with a network request.`);
+          }
+
+          try {
+            response = await this._getFromNetwork(request, event);
+          } catch (err) {
+            error = err;
+          }
+
+          {
+            if (response) {
+              logs.push(`Got response from network.`);
+            } else {
+              logs.push(`Unable to get a response from the network.`);
+            }
+          }
+        } else {
+          {
+            logs.push(`Found a cached response in the '${this._cacheName}' cache.`);
+          }
+        }
+
+        {
+          logger_js.logger.groupCollapsed(messages.strategyStart('CacheFirst', request));
+
+          for (const log of logs) {
+            logger_js.logger.log(log);
+          }
+
+          messages.printFinalResponse(response);
+          logger_js.logger.groupEnd();
+        }
+
+        if (!response) {
+          throw new WorkboxError_js.WorkboxError('no-response', {
+            url: request.url,
+            error
+          });
+        }
+
+        return response;
+      }
+      /**
+       * Handles the network and cache part of CacheFirst.
+       *
+       * @param {Request} request
+       * @param {Event} [event]
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+
+
+      async _getFromNetwork(request, event) {
+        const response = await fetchWrapper_js.fetchWrapper.fetch({
+          request,
+          event,
+          fetchOptions: this._fetchOptions,
+          plugins: this._plugins
+        }); // Keep the service worker while we put the request to the cache
+
+        const responseClone = response.clone();
+        const cachePutPromise = cacheWrapper_js.cacheWrapper.put({
+          cacheName: this._cacheName,
+          request,
+          response: responseClone,
+          event,
+          plugins: this._plugins
+        });
+
+        if (event) {
+          try {
+            event.waitUntil(cachePutPromise);
+          } catch (error) {
+            {
+              logger_js.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_js.getFriendlyURL(request.url)}'.`);
+            }
+          }
+        }
+
+        return response;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * An implementation of a
+     * [cache-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#cache-only}
+     * request strategy.
+     *
+     * This class is useful if you want to take advantage of any
+     * [Workbox plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}.
+     *
+     * If there is no cache match, this will throw a `WorkboxError` exception.
+     *
+     * @memberof module:workbox-strategies
+     */
+
+    class CacheOnly {
+      /**
+       * @param {Object} options
+       * @param {string} options.cacheName Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * [workbox-core]{@link module:workbox-core.cacheNames}.
+       * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
+       */
+      constructor(options = {}) {
+        this._cacheName = cacheNames_js.cacheNames.getRuntimeName(options.cacheName);
+        this._plugins = options.plugins || [];
+        this._matchOptions = options.matchOptions;
+      }
+      /**
+       * This method will perform a request strategy and follows an API that
+       * will work with the
+       * [Workbox Router]{@link module:workbox-routing.Router}.
+       *
+       * @param {Object} options
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {Event} [options.event] The event that triggered the request.
+       * @return {Promise<Response>}
+       */
+
+
+      async handle({
+        event,
+        request
+      }) {
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: 'CacheOnly',
+            funcName: 'makeRequest',
+            paramName: 'request'
+          });
+        }
+
+        const response = await cacheWrapper_js.cacheWrapper.match({
+          cacheName: this._cacheName,
+          request,
+          event,
+          matchOptions: this._matchOptions,
+          plugins: this._plugins
+        });
+
+        {
+          logger_js.logger.groupCollapsed(messages.strategyStart('CacheOnly', request));
+
+          if (response) {
+            logger_js.logger.log(`Found a cached response in the '${this._cacheName}'` + ` cache.`);
+            messages.printFinalResponse(response);
+          } else {
+            logger_js.logger.log(`No response found in the '${this._cacheName}' cache.`);
+          }
+
+          logger_js.logger.groupEnd();
+        }
+
+        if (!response) {
+          throw new WorkboxError_js.WorkboxError('no-response', {
+            url: request.url
+          });
+        }
+
+        return response;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    const cacheOkAndOpaquePlugin = {
+      /**
+       * Returns a valid response (to allow caching) if the status is 200 (OK) or
+       * 0 (opaque).
+       *
+       * @param {Object} options
+       * @param {Response} options.response
+       * @return {Response|null}
+       *
+       * @private
+       */
+      cacheWillUpdate: async ({
+        response
+      }) => {
+        if (response.status === 200 || response.status === 0) {
+          return response;
+        }
+
+        return null;
+      }
+    };
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * An implementation of a
+     * [network first]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#network-falling-back-to-cache}
+     * request strategy.
+     *
+     * By default, this strategy will cache responses with a 200 status code as
+     * well as [opaque responses]{@link https://developers.google.com/web/tools/workbox/guides/handle-third-party-requests}.
+     * Opaque responses are are cross-origin requests where the response doesn't
+     * support [CORS]{@link https://enable-cors.org/}.
+     *
+     * If the network request fails, and there is no cache match, this will throw
+     * a `WorkboxError` exception.
+     *
+     * @memberof module:workbox-strategies
+     */
+
+    class NetworkFirst {
+      /**
+       * @param {Object} options
+       * @param {string} options.cacheName Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * [workbox-core]{@link module:workbox-core.cacheNames}.
+       * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} options.fetchOptions Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of all fetch() requests made by this strategy.
+       * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
+       * @param {number} options.networkTimeoutSeconds If set, any network requests
+       * that fail to respond within the timeout will fallback to the cache.
+       *
+       * This option can be used to combat
+       * "[lie-fi]{@link https://developers.google.com/web/fundamentals/performance/poor-connectivity/#lie-fi}"
+       * scenarios.
+       */
+      constructor(options = {}) {
+        this._cacheName = cacheNames_js.cacheNames.getRuntimeName(options.cacheName);
+
+        if (options.plugins) {
+          const isUsingCacheWillUpdate = options.plugins.some(plugin => !!plugin.cacheWillUpdate);
+          this._plugins = isUsingCacheWillUpdate ? options.plugins : [cacheOkAndOpaquePlugin, ...options.plugins];
+        } else {
+          // No plugins passed in, use the default plugin.
+          this._plugins = [cacheOkAndOpaquePlugin];
+        }
+
+        this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;
+
+        {
+          if (this._networkTimeoutSeconds) {
+            assert_js.assert.isType(this._networkTimeoutSeconds, 'number', {
+              moduleName: 'workbox-strategies',
+              className: 'NetworkFirst',
+              funcName: 'constructor',
+              paramName: 'networkTimeoutSeconds'
+            });
+          }
+        }
+
+        this._fetchOptions = options.fetchOptions;
+        this._matchOptions = options.matchOptions;
+      }
+      /**
+       * This method will perform a request strategy and follows an API that
+       * will work with the
+       * [Workbox Router]{@link module:workbox-routing.Router}.
+       *
+       * @param {Object} options
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {Event} [options.event] The event that triggered the request.
+       * @return {Promise<Response>}
+       */
+
+
+      async handle({
+        event,
+        request
+      }) {
+        const logs = [];
+
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: 'NetworkFirst',
+            funcName: 'handle',
+            paramName: 'makeRequest'
+          });
+        }
+
+        const promises = [];
+        let timeoutId;
+
+        if (this._networkTimeoutSeconds) {
+          const {
+            id,
+            promise
+          } = this._getTimeoutPromise({
+            request,
+            event,
+            logs
+          });
+
+          timeoutId = id;
+          promises.push(promise);
+        }
+
+        const networkPromise = this._getNetworkPromise({
+          timeoutId,
+          request,
+          event,
+          logs
+        });
+
+        promises.push(networkPromise); // Promise.race() will resolve as soon as the first promise resolves.
+
+        let response = await Promise.race(promises); // If Promise.race() resolved with null, it might be due to a network
+        // timeout + a cache miss. If that were to happen, we'd rather wait until
+        // the networkPromise resolves instead of returning null.
+        // Note that it's fine to await an already-resolved promise, so we don't
+        // have to check to see if it's still "in flight".
+
+        if (!response) {
+          response = await networkPromise;
+        }
+
+        {
+          logger_js.logger.groupCollapsed(messages.strategyStart('NetworkFirst', request));
+
+          for (const log of logs) {
+            logger_js.logger.log(log);
+          }
+
+          messages.printFinalResponse(response);
+          logger_js.logger.groupEnd();
+        }
+
+        if (!response) {
+          throw new WorkboxError_js.WorkboxError('no-response', {
+            url: request.url
+          });
+        }
+
+        return response;
+      }
+      /**
+       * @param {Object} options
+       * @param {Request} options.request
+       * @param {Array} options.logs A reference to the logs array
+       * @param {Event} [options.event]
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+
+
+      _getTimeoutPromise({
+        request,
+        logs,
+        event
+      }) {
+        let timeoutId;
+        const timeoutPromise = new Promise(resolve => {
+          const onNetworkTimeout = async () => {
+            {
+              logs.push(`Timing out the network response at ` + `${this._networkTimeoutSeconds} seconds.`);
+            }
+
+            resolve(await this._respondFromCache({
+              request,
+              event
+            }));
+          };
+
+          timeoutId = setTimeout(onNetworkTimeout, this._networkTimeoutSeconds * 1000);
+        });
+        return {
+          promise: timeoutPromise,
+          id: timeoutId
+        };
+      }
+      /**
+       * @param {Object} options
+       * @param {number|undefined} options.timeoutId
+       * @param {Request} options.request
+       * @param {Array} options.logs A reference to the logs Array.
+       * @param {Event} [options.event]
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+
+
+      async _getNetworkPromise({
+        timeoutId,
+        request,
+        logs,
+        event
+      }) {
+        let error;
+        let response;
+
+        try {
+          response = await fetchWrapper_js.fetchWrapper.fetch({
+            request,
+            event,
+            fetchOptions: this._fetchOptions,
+            plugins: this._plugins
+          });
+        } catch (err) {
+          error = err;
+        }
+
+        if (timeoutId) {
+          clearTimeout(timeoutId);
+        }
+
+        {
+          if (response) {
+            logs.push(`Got response from network.`);
+          } else {
+            logs.push(`Unable to get a response from the network. Will respond ` + `with a cached response.`);
+          }
+        }
+
+        if (error || !response) {
+          response = await this._respondFromCache({
+            request,
+            event
+          });
+
+          {
+            if (response) {
+              logs.push(`Found a cached response in the '${this._cacheName}'` + ` cache.`);
+            } else {
+              logs.push(`No response found in the '${this._cacheName}' cache.`);
+            }
+          }
+        } else {
+          // Keep the service worker alive while we put the request in the cache
+          const responseClone = response.clone();
+          const cachePut = cacheWrapper_js.cacheWrapper.put({
+            cacheName: this._cacheName,
+            request,
+            response: responseClone,
+            event,
+            plugins: this._plugins
+          });
+
+          if (event) {
+            try {
+              // The event has been responded to so we can keep the SW alive to
+              // respond to the request
+              event.waitUntil(cachePut);
+            } catch (err) {
+              {
+                logger_js.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_js.getFriendlyURL(request.url)}'.`);
+              }
+            }
+          }
+        }
+
+        return response;
+      }
+      /**
+       * Used if the network timeouts or fails to make the request.
+       *
+       * @param {Object} options
+       * @param {Request} request The request to match in the cache
+       * @param {Event} [options.event]
+       * @return {Promise<Object>}
+       *
+       * @private
+       */
+
+
+      _respondFromCache({
+        event,
+        request
+      }) {
+        return cacheWrapper_js.cacheWrapper.match({
+          cacheName: this._cacheName,
+          request,
+          event,
+          matchOptions: this._matchOptions,
+          plugins: this._plugins
+        });
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * An implementation of a
+     * [network-only]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#network-only}
+     * request strategy.
+     *
+     * This class is useful if you want to take advantage of any
+     * [Workbox plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}.
+     *
+     * If the network request fails, this will throw a `WorkboxError` exception.
+     *
+     * @memberof module:workbox-strategies
+     */
+
+    class NetworkOnly {
+      /**
+       * @param {Object} options
+       * @param {string} options.cacheName Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * [workbox-core]{@link module:workbox-core.cacheNames}.
+       * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} options.fetchOptions Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of all fetch() requests made by this strategy.
+       */
+      constructor(options = {}) {
+        this._plugins = options.plugins || [];
+        this._fetchOptions = options.fetchOptions;
+      }
+      /**
+       * This method will perform a request strategy and follows an API that
+       * will work with the
+       * [Workbox Router]{@link module:workbox-routing.Router}.
+       *
+       * @param {Object} options
+       * @param {Request|string} options.request The request to run this strategy for.
+       * @param {Event} [options.event] The event that triggered the request.
+       * @return {Promise<Response>}
+       */
+
+
+      async handle({
+        event,
+        request
+      }) {
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: 'NetworkOnly',
+            funcName: 'handle',
+            paramName: 'request'
+          });
+        }
+
+        let error;
+        let response;
+
+        try {
+          response = await fetchWrapper_js.fetchWrapper.fetch({
+            request,
+            event,
+            fetchOptions: this._fetchOptions,
+            plugins: this._plugins
+          });
+        } catch (err) {
+          error = err;
+        }
+
+        {
+          logger_js.logger.groupCollapsed(messages.strategyStart('NetworkOnly', request));
+
+          if (response) {
+            logger_js.logger.log(`Got response from network.`);
+          } else {
+            logger_js.logger.log(`Unable to get a response from the network.`);
+          }
+
+          messages.printFinalResponse(response);
+          logger_js.logger.groupEnd();
+        }
+
+        if (!response) {
+          throw new WorkboxError_js.WorkboxError('no-response', {
+            url: request.url,
+            error
+          });
+        }
+
+        return response;
+      }
+
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * An implementation of a
+     * [stale-while-revalidate]{@link https://developers.google.com/web/fundamentals/instant-and-offline/offline-cookbook/#stale-while-revalidate}
+     * request strategy.
+     *
+     * Resources are requested from both the cache and the network in parallel.
+     * The strategy will respond with the cached version if available, otherwise
+     * wait for the network response. The cache is updated with the network response
+     * with each successful request.
+     *
+     * By default, this strategy will cache responses with a 200 status code as
+     * well as [opaque responses]{@link https://developers.google.com/web/tools/workbox/guides/handle-third-party-requests}.
+     * Opaque responses are cross-origin requests where the response doesn't
+     * support [CORS]{@link https://enable-cors.org/}.
+     *
+     * If the network request fails, and there is no cache match, this will throw
+     * a `WorkboxError` exception.
+     *
+     * @memberof module:workbox-strategies
+     */
+
+    class StaleWhileRevalidate {
+      /**
+       * @param {Object} options
+       * @param {string} options.cacheName Cache name to store and retrieve
+       * requests. Defaults to cache names provided by
+       * [workbox-core]{@link module:workbox-core.cacheNames}.
+       * @param {Array<Object>} options.plugins [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
+       * to use in conjunction with this caching strategy.
+       * @param {Object} options.fetchOptions Values passed along to the
+       * [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
+       * of all fetch() requests made by this strategy.
+       * @param {Object} options.matchOptions [`CacheQueryOptions`](https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions)
+       */
+      constructor(options = {}) {
+        this._cacheName = cacheNames_js.cacheNames.getRuntimeName(options.cacheName);
+        this._plugins = options.plugins || [];
+
+        if (options.plugins) {
+          const isUsingCacheWillUpdate = options.plugins.some(plugin => !!plugin.cacheWillUpdate);
+          this._plugins = isUsingCacheWillUpdate ? options.plugins : [cacheOkAndOpaquePlugin, ...options.plugins];
+        } else {
+          // No plugins passed in, use the default plugin.
+          this._plugins = [cacheOkAndOpaquePlugin];
+        }
+
+        this._fetchOptions = options.fetchOptions;
+        this._matchOptions = options.matchOptions;
+      }
+      /**
+       * This method will perform a request strategy and follows an API that
+       * will work with the
+       * [Workbox Router]{@link module:workbox-routing.Router}.
+       *
+       * @param {Object} options
+       * @param {Request|string} options.request A request to run this strategy for.
+       * @param {Event} [options.event] The event that triggered the request.
+       * @return {Promise<Response>}
+       */
+
+
+      async handle({
+        event,
+        request
+      }) {
+        const logs = [];
+
+        if (typeof request === 'string') {
+          request = new Request(request);
+        }
+
+        {
+          assert_js.assert.isInstance(request, Request, {
+            moduleName: 'workbox-strategies',
+            className: 'StaleWhileRevalidate',
+            funcName: 'handle',
+            paramName: 'request'
+          });
+        }
+
+        const fetchAndCachePromise = this._getFromNetwork({
+          request,
+          event
+        });
+
+        let response = await cacheWrapper_js.cacheWrapper.match({
+          cacheName: this._cacheName,
+          request,
+          event,
+          matchOptions: this._matchOptions,
+          plugins: this._plugins
+        });
+        let error;
+
+        if (response) {
+          {
+            logs.push(`Found a cached response in the '${this._cacheName}'` + ` cache. Will update with the network response in the background.`);
+          }
+
+          if (event) {
+            try {
+              event.waitUntil(fetchAndCachePromise);
+            } catch (error) {
+              {
+                logger_js.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_js.getFriendlyURL(request.url)}'.`);
+              }
+            }
+          }
+        } else {
+          {
+            logs.push(`No response found in the '${this._cacheName}' cache. ` + `Will wait for the network response.`);
+          }
+
+          try {
+            response = await fetchAndCachePromise;
+          } catch (err) {
+            error = err;
+          }
+        }
+
+        {
+          logger_js.logger.groupCollapsed(messages.strategyStart('StaleWhileRevalidate', request));
+
+          for (const log of logs) {
+            logger_js.logger.log(log);
+          }
+
+          messages.printFinalResponse(response);
+          logger_js.logger.groupEnd();
+        }
+
+        if (!response) {
+          throw new WorkboxError_js.WorkboxError('no-response', {
+            url: request.url,
+            error
+          });
+        }
+
+        return response;
+      }
+      /**
+       * @param {Object} options
+       * @param {Request} options.request
+       * @param {Event} [options.event]
+       * @return {Promise<Response>}
+       *
+       * @private
+       */
+
+
+      async _getFromNetwork({
+        request,
+        event
+      }) {
+        const response = await fetchWrapper_js.fetchWrapper.fetch({
+          request,
+          event,
+          fetchOptions: this._fetchOptions,
+          plugins: this._plugins
+        });
+        const cachePutPromise = cacheWrapper_js.cacheWrapper.put({
+          cacheName: this._cacheName,
+          request,
+          response: response.clone(),
+          event,
+          plugins: this._plugins
+        });
+
+        if (event) {
+          try {
+            event.waitUntil(cachePutPromise);
+          } catch (error) {
+            {
+              logger_js.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_js.getFriendlyURL(request.url)}'.`);
+            }
+          }
+        }
+
+        return response;
+      }
+
+    }
+
+    exports.CacheFirst = CacheFirst;
+    exports.CacheOnly = CacheOnly;
+    exports.NetworkFirst = NetworkFirst;
+    exports.NetworkOnly = NetworkOnly;
+    exports.StaleWhileRevalidate = StaleWhileRevalidate;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-strategies.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.strategies=function(t,e,s,i,n){"use strict";try{self["workbox:strategies:5.1.4"]&&_()}catch(t){}const r={cacheWillUpdate:async({response:t})=>200===t.status||0===t.status?t:null};return t.CacheFirst=class{constructor(t={}){this.t=e.cacheNames.getRuntimeName(t.cacheName),this.s=t.plugins||[],this.i=t.fetchOptions,this.h=t.matchOptions}async handle({event:t,request:e}){"string"==typeof e&&(e=new Request(e));let i,r=await s.cacheWrapper.match({cacheName:this.t,request:e,event:t,matchOptions:this.h,plugins:this.s});if(!r)try{r=await this.o(e,t)}catch(t){i=t}if(!r)throw new n.WorkboxError("no-response",{url:e.url,error:i});return r}async o(t,e){const n=await i.fetchWrapper.fetch({request:t,event:e,fetchOptions:this.i,plugins:this.s}),r=n.clone(),h=s.cacheWrapper.put({cacheName:this.t,request:t,response:r,event:e,plugins:this.s});if(e)try{e.waitUntil(h)}catch(t){}return n}},t.CacheOnly=class{constructor(t={}){this.t=e.cacheNames.getRuntimeName(t.cacheName),this.s=t.plugins||[],this.h=t.matchOptions}async handle({event:t,request:e}){"string"==typeof e&&(e=new Request(e));const i=await s.cacheWrapper.match({cacheName:this.t,request:e,event:t,matchOptions:this.h,plugins:this.s});if(!i)throw new n.WorkboxError("no-response",{url:e.url});return i}},t.NetworkFirst=class{constructor(t={}){if(this.t=e.cacheNames.getRuntimeName(t.cacheName),t.plugins){const e=t.plugins.some(t=>!!t.cacheWillUpdate);this.s=e?t.plugins:[r,...t.plugins]}else this.s=[r];this.u=t.networkTimeoutSeconds||0,this.i=t.fetchOptions,this.h=t.matchOptions}async handle({event:t,request:e}){const s=[];"string"==typeof e&&(e=new Request(e));const i=[];let r;if(this.u){const{id:n,promise:h}=this.l({request:e,event:t,logs:s});r=n,i.push(h)}const h=this.p({timeoutId:r,request:e,event:t,logs:s});i.push(h);let o=await Promise.race(i);if(o||(o=await h),!o)throw new n.WorkboxError("no-response",{url:e.url});return o}l({request:t,logs:e,event:s}){let i;return{promise:new Promise(e=>{i=setTimeout(async()=>{e(await this.q({request:t,event:s}))},1e3*this.u)}),id:i}}async p({timeoutId:t,request:e,logs:n,event:r}){let h,o;try{o=await i.fetchWrapper.fetch({request:e,event:r,fetchOptions:this.i,plugins:this.s})}catch(t){h=t}if(t&&clearTimeout(t),h||!o)o=await this.q({request:e,event:r});else{const t=o.clone(),i=s.cacheWrapper.put({cacheName:this.t,request:e,response:t,event:r,plugins:this.s});if(r)try{r.waitUntil(i)}catch(t){}}return o}q({event:t,request:e}){return s.cacheWrapper.match({cacheName:this.t,request:e,event:t,matchOptions:this.h,plugins:this.s})}},t.NetworkOnly=class{constructor(t={}){this.s=t.plugins||[],this.i=t.fetchOptions}async handle({event:t,request:e}){let s,r;"string"==typeof e&&(e=new Request(e));try{r=await i.fetchWrapper.fetch({request:e,event:t,fetchOptions:this.i,plugins:this.s})}catch(t){s=t}if(!r)throw new n.WorkboxError("no-response",{url:e.url,error:s});return r}},t.StaleWhileRevalidate=class{constructor(t={}){if(this.t=e.cacheNames.getRuntimeName(t.cacheName),this.s=t.plugins||[],t.plugins){const e=t.plugins.some(t=>!!t.cacheWillUpdate);this.s=e?t.plugins:[r,...t.plugins]}else this.s=[r];this.i=t.fetchOptions,this.h=t.matchOptions}async handle({event:t,request:e}){"string"==typeof e&&(e=new Request(e));const i=this.o({request:e,event:t});let r,h=await s.cacheWrapper.match({cacheName:this.t,request:e,event:t,matchOptions:this.h,plugins:this.s});if(h){if(t)try{t.waitUntil(i)}catch(r){}}else try{h=await i}catch(t){r=t}if(!h)throw new n.WorkboxError("no-response",{url:e.url,error:r});return h}async o({request:t,event:e}){const n=await i.fetchWrapper.fetch({request:t,event:e,fetchOptions:this.i,plugins:this.s}),r=s.cacheWrapper.put({cacheName:this.t,request:t,response:n.clone(),event:e,plugins:this.s});if(e)try{e.waitUntil(r)}catch(t){}return n}},t}({},workbox.core._private,workbox.core._private,workbox.core._private,workbox.core._private);
+

source/js/workbox/workbox-streams.dev.js

@@ -0,0 +1,318 @@
+this.workbox = this.workbox || {};
+this.workbox.streams = (function (exports, logger_js, assert_js, Deferred_js, canConstructReadableStream_js) {
+    'use strict';
+
+    try {
+      self['workbox:streams:5.1.4'] && _();
+    } catch (e) {}
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * Takes either a Response, a ReadableStream, or a
+     * [BodyInit](https://fetch.spec.whatwg.org/#bodyinit) and returns the
+     * ReadableStreamReader object associated with it.
+     *
+     * @param {module:workbox-streams.StreamSource} source
+     * @return {ReadableStreamReader}
+     * @private
+     */
+
+    function _getReaderFromSource(source) {
+      if (source instanceof Response) {
+        return source.body.getReader();
+      }
+
+      if (source instanceof ReadableStream) {
+        return source.getReader();
+      }
+
+      return new Response(source).body.getReader();
+    }
+    /**
+     * Takes multiple source Promises, each of which could resolve to a Response, a
+     * ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit).
+     *
+     * Returns an object exposing a ReadableStream with each individual stream's
+     * data returned in sequence, along with a Promise which signals when the
+     * stream is finished (useful for passing to a FetchEvent's waitUntil()).
+     *
+     * @param {Array<Promise<module:workbox-streams.StreamSource>>} sourcePromises
+     * @return {Object<{done: Promise, stream: ReadableStream}>}
+     *
+     * @memberof module:workbox-streams
+     */
+
+
+    function concatenate(sourcePromises) {
+      {
+        assert_js.assert.isArray(sourcePromises, {
+          moduleName: 'workbox-streams',
+          funcName: 'concatenate',
+          paramName: 'sourcePromises'
+        });
+      }
+
+      const readerPromises = sourcePromises.map(sourcePromise => {
+        return Promise.resolve(sourcePromise).then(source => {
+          return _getReaderFromSource(source);
+        });
+      });
+      const streamDeferred = new Deferred_js.Deferred();
+      let i = 0;
+      const logMessages = [];
+      const stream = new ReadableStream({
+        pull(controller) {
+          return readerPromises[i].then(reader => reader.read()).then(result => {
+            if (result.done) {
+              {
+                logMessages.push(['Reached the end of source:', sourcePromises[i]]);
+              }
+
+              i++;
+
+              if (i >= readerPromises.length) {
+                // Log all the messages in the group at once in a single group.
+                {
+                  logger_js.logger.groupCollapsed(`Concatenating ${readerPromises.length} sources.`);
+
+                  for (const message of logMessages) {
+                    if (Array.isArray(message)) {
+                      logger_js.logger.log(...message);
+                    } else {
+                      logger_js.logger.log(message);
+                    }
+                  }
+
+                  logger_js.logger.log('Finished reading all sources.');
+                  logger_js.logger.groupEnd();
+                }
+
+                controller.close();
+                streamDeferred.resolve();
+                return;
+              } // The `pull` method is defined because we're inside it.
+
+
+              return this.pull(controller);
+            } else {
+              controller.enqueue(result.value);
+            }
+          }).catch(error => {
+            {
+              logger_js.logger.error('An error occurred:', error);
+            }
+
+            streamDeferred.reject(error);
+            throw error;
+          });
+        },
+
+        cancel() {
+          {
+            logger_js.logger.warn('The ReadableStream was cancelled.');
+          }
+
+          streamDeferred.resolve();
+        }
+
+      });
+      return {
+        done: streamDeferred.promise,
+        stream
+      };
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * This is a utility method that determines whether the current browser supports
+     * the features required to create streamed responses. Currently, it checks if
+     * [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)
+     * is available.
+     *
+     * @private
+     * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
+     * `'text/html'` will be used by default.
+     * @return {boolean} `true`, if the current browser meets the requirements for
+     * streaming responses, and `false` otherwise.
+     *
+     * @memberof module:workbox-streams
+     */
+
+    function createHeaders(headersInit = {}) {
+      // See https://github.com/GoogleChrome/workbox/issues/1461
+      const headers = new Headers(headersInit);
+
+      if (!headers.has('content-type')) {
+        headers.set('content-type', 'text/html');
+      }
+
+      return headers;
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * Takes multiple source Promises, each of which could resolve to a Response, a
+     * ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit),
+     * along with a
+     * [HeadersInit](https://fetch.spec.whatwg.org/#typedefdef-headersinit).
+     *
+     * Returns an object exposing a Response whose body consists of each individual
+     * stream's data returned in sequence, along with a Promise which signals when
+     * the stream is finished (useful for passing to a FetchEvent's waitUntil()).
+     *
+     * @param {Array<Promise<module:workbox-streams.StreamSource>>} sourcePromises
+     * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
+     * `'text/html'` will be used by default.
+     * @return {Object<{done: Promise, response: Response}>}
+     *
+     * @memberof module:workbox-streams
+     */
+
+    function concatenateToResponse(sourcePromises, headersInit) {
+      const {
+        done,
+        stream
+      } = concatenate(sourcePromises);
+      const headers = createHeaders(headersInit);
+      const response = new Response(stream, {
+        headers
+      });
+      return {
+        done,
+        response
+      };
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * This is a utility method that determines whether the current browser supports
+     * the features required to create streamed responses. Currently, it checks if
+     * [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)
+     * can be created.
+     *
+     * @return {boolean} `true`, if the current browser meets the requirements for
+     * streaming responses, and `false` otherwise.
+     *
+     * @memberof module:workbox-streams
+     */
+
+    function isSupported() {
+      return canConstructReadableStream_js.canConstructReadableStream();
+    }
+
+    /*
+      Copyright 2018 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.
+    */
+    /**
+     * A shortcut to create a strategy that could be dropped-in to Workbox's router.
+     *
+     * On browsers that do not support constructing new `ReadableStream`s, this
+     * strategy will automatically wait for all the `sourceFunctions` to complete,
+     * and create a final response that concatenates their values together.
+     *
+     * @param {Array<function({event, request, url, params})>} sourceFunctions
+     * An array of functions similar to {@link module:workbox-routing~handlerCallback}
+     * but that instead return a {@link module:workbox-streams.StreamSource} (or a
+     * Promise which resolves to one).
+     * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
+     * `'text/html'` will be used by default.
+     * @return {module:workbox-routing~handlerCallback}
+     * @memberof module:workbox-streams
+     */
+
+    function strategy(sourceFunctions, headersInit) {
+      return async ({
+        event,
+        request,
+        url,
+        params
+      }) => {
+        const sourcePromises = sourceFunctions.map(fn => {
+          // Ensure the return value of the function is always a promise.
+          return Promise.resolve(fn({
+            event,
+            request,
+            url,
+            params
+          }));
+        });
+
+        if (isSupported()) {
+          const {
+            done,
+            response
+          } = concatenateToResponse(sourcePromises, headersInit);
+
+          if (event) {
+            event.waitUntil(done);
+          }
+
+          return response;
+        }
+
+        {
+          logger_js.logger.log(`The current browser doesn't support creating response ` + `streams. Falling back to non-streaming response instead.`);
+        } // Fallback to waiting for everything to finish, and concatenating the
+        // responses.
+
+
+        const blobPartsPromises = sourcePromises.map(async sourcePromise => {
+          const source = await sourcePromise;
+
+          if (source instanceof Response) {
+            return source.blob();
+          } else {
+            // Technically, a `StreamSource` object can include any valid
+            // `BodyInit` type, including `FormData` and `URLSearchParams`, which
+            // cannot be passed to the Blob constructor directly, so we have to
+            // convert them to actual Blobs first.
+            return new Response(source).blob();
+          }
+        });
+        const blobParts = await Promise.all(blobPartsPromises);
+        const headers = createHeaders(headersInit); // Constructing a new Response from a Blob source is well-supported.
+        // So is constructing a new Blob from multiple source Blobs or strings.
+
+        return new Response(new Blob(blobParts), {
+          headers
+        });
+      };
+    }
+
+    exports.concatenate = concatenate;
+    exports.concatenateToResponse = concatenateToResponse;
+    exports.isSupported = isSupported;
+    exports.strategy = strategy;
+
+    return exports;
+
+}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
+

source/js/workbox/workbox-streams.prod.js

@@ -0,0 +1,2 @@
+this.workbox=this.workbox||{},this.workbox.streams=function(e,n,t){"use strict";try{self["workbox:streams:5.1.4"]&&_()}catch(e){}function s(e){const t=e.map(e=>Promise.resolve(e).then(e=>function(e){return e instanceof Response?e.body.getReader():e instanceof ReadableStream?e.getReader():new Response(e).body.getReader()}(e))),s=new n.Deferred;let r=0;const o=new ReadableStream({pull(e){return t[r].then(e=>e.read()).then(n=>{if(n.done)return r++,r>=t.length?(e.close(),void s.resolve()):this.pull(e);e.enqueue(n.value)}).catch(e=>{throw s.reject(e),e})},cancel(){s.resolve()}});return{done:s.promise,stream:o}}function r(e={}){const n=new Headers(e);return n.has("content-type")||n.set("content-type","text/html"),n}function o(e,n){const{done:t,stream:o}=s(e),c=r(n);return{done:t,response:new Response(o,{headers:c})}}function c(){return t.canConstructReadableStream()}return e.concatenate=s,e.concatenateToResponse=o,e.isSupported=c,e.strategy=function(e,n){return async({event:t,request:s,url:a,params:u})=>{const i=e.map(e=>Promise.resolve(e({event:t,request:s,url:a,params:u})));if(c()){const{done:e,response:s}=o(i,n);return t&&t.waitUntil(e),s}const f=i.map(async e=>{const n=await e;return n instanceof Response?n.blob():new Response(n).blob()}),p=await Promise.all(f),w=r(n);return new Response(new Blob(p),{headers:w})}},e}({},workbox.core._private,workbox.core._private);
+

source/js/workbox/workbox-sw.js

@@ -0,0 +1,2 @@
+!function(){"use strict";try{self["workbox:sw:5.1.4"]&&_()}catch(t){}const t={backgroundSync:"background-sync",broadcastUpdate:"broadcast-update",cacheableResponse:"cacheable-response",core:"core",expiration:"expiration",googleAnalytics:"offline-ga",navigationPreload:"navigation-preload",precaching:"precaching",rangeRequests:"range-requests",routing:"routing",strategies:"strategies",streams:"streams"};self.workbox=new class{constructor(){return this.v={},this.t={debug:"localhost"===self.location.hostname,modulePathPrefix:null,modulePathCb:null},this.s=this.t.debug?"dev":"prod",this.o=!1,new Proxy(this,{get(e,s){if(e[s])return e[s];const o=t[s];return o&&e.loadModule("workbox-"+o),e[s]}})}setConfig(t={}){if(this.o)throw new Error("Config must be set before accessing workbox.* modules");Object.assign(this.t,t),this.s=this.t.debug?"dev":"prod"}loadModule(t){const e=this.i(t);try{importScripts(e),this.o=!0}catch(s){throw console.error(`Unable to import module '${t}' from '${e}'.`),s}}i(t){if(this.t.modulePathCb)return this.t.modulePathCb(t,this.t.debug);let e=["https://cdn.jsdelivr.net/npm/workbox-cdn@5.1.4/workbox"];const s=`${t}.${this.s}.js`,o=this.t.modulePathPrefix;return o&&(e=o.split("/"),""===e[e.length-1]&&e.splice(e.length-1,1)),e.push(s),e.join("/")}}}();
+

source/js/workbox/workbox-window.dev.mjs

@@ -0,0 +1,943 @@
+try {
+  self['workbox:window:5.1.4'] && _();
+} catch (e) {}
+
+/*
+  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.
+*/
+/**
+ * Sends a data object to a service worker via `postMessage` and resolves with
+ * a response (if any).
+ *
+ * A response can be set in a message handler in the service worker by
+ * calling `event.ports[0].postMessage(...)`, which will resolve the promise
+ * returned by `messageSW()`. If no response is set, the promise will not
+ * resolve.
+ *
+ * @param {ServiceWorker} sw The service worker to send the message to.
+ * @param {Object} data An object to send to the service worker.
+ * @return {Promise<Object|undefined>}
+ * @memberof module:workbox-window
+ */
+
+function messageSW(sw, data) {
+  return new Promise(resolve => {
+    const messageChannel = new MessageChannel();
+
+    messageChannel.port1.onmessage = event => {
+      resolve(event.data);
+    };
+
+    sw.postMessage(data, [messageChannel.port2]);
+  });
+}
+
+try {
+  self['workbox:core:5.1.4'] && _();
+} catch (e) {}
+
+/*
+  Copyright 2018 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.
+*/
+/**
+ * The Deferred class composes Promises in a way that allows for them to be
+ * resolved or rejected from outside the constructor. In most cases promises
+ * should be used directly, but Deferreds can be necessary when the logic to
+ * resolve a promise must be separate.
+ *
+ * @private
+ */
+
+class Deferred {
+  /**
+   * Creates a promise and exposes its resolve and reject functions as methods.
+   */
+  constructor() {
+    this.promise = new Promise((resolve, reject) => {
+      this.resolve = resolve;
+      this.reject = reject;
+    });
+  }
+
+}
+
+/*
+  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.
+*/
+/**
+ * A helper function that prevents a promise from being flagged as unused.
+ *
+ * @private
+ **/
+
+function dontWaitFor(promise) {
+  // Effective no-op.
+  promise.then(() => {});
+}
+
+/*
+  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.
+*/
+const logger =  (() => {
+  // Don't overwrite this value if it's already set.
+  // See https://github.com/GoogleChrome/workbox/pull/2284#issuecomment-560470923
+  if (!('__WB_DISABLE_DEV_LOGS' in self)) {
+    self.__WB_DISABLE_DEV_LOGS = false;
+  }
+
+  let inGroup = false;
+  const methodToColorMap = {
+    debug: `#7f8c8d`,
+    log: `#2ecc71`,
+    warn: `#f39c12`,
+    error: `#c0392b`,
+    groupCollapsed: `#3498db`,
+    groupEnd: null
+  };
+
+  const print = function (method, args) {
+    if (self.__WB_DISABLE_DEV_LOGS) {
+      return;
+    }
+
+    if (method === 'groupCollapsed') {
+      // Safari doesn't print all console.groupCollapsed() arguments:
+      // https://bugs.webkit.org/show_bug.cgi?id=182754
+      if (/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {
+        console[method](...args);
+        return;
+      }
+    }
+
+    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.
+
+    const logPrefix = inGroup ? [] : ['%cworkbox', styles.join(';')];
+    console[method](...logPrefix, ...args);
+
+    if (method === 'groupCollapsed') {
+      inGroup = true;
+    }
+
+    if (method === 'groupEnd') {
+      inGroup = false;
+    }
+  };
+
+  const api = {};
+  const loggerMethods = Object.keys(methodToColorMap);
+
+  for (const key of loggerMethods) {
+    const method = key;
+
+    api[method] = (...args) => {
+      print(method, args);
+    };
+  }
+
+  return api;
+})();
+
+/*
+  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.
+*/
+
+/**
+ * A minimal `EventTarget` shim.
+ * This is necessary because not all browsers support constructable
+ * `EventTarget`, so using a real `EventTarget` will error.
+ * @private
+ */
+class WorkboxEventTarget {
+  constructor() {
+    this._eventListenerRegistry = new Map();
+  }
+  /**
+   * @param {string} type
+   * @param {Function} listener
+   * @private
+   */
+
+
+  addEventListener(type, listener) {
+    const foo = this._getEventListenersByType(type);
+
+    foo.add(listener);
+  }
+  /**
+   * @param {string} type
+   * @param {Function} listener
+   * @private
+   */
+
+
+  removeEventListener(type, listener) {
+    this._getEventListenersByType(type).delete(listener);
+  }
+  /**
+   * @param {Object} event
+   * @private
+   */
+
+
+  dispatchEvent(event) {
+    event.target = this;
+
+    const listeners = this._getEventListenersByType(event.type);
+
+    for (const listener of listeners) {
+      listener(event);
+    }
+  }
+  /**
+   * Returns a Set of listeners associated with the passed event type.
+   * If no handlers have been registered, an empty Set is returned.
+   *
+   * @param {string} type The event type.
+   * @return {Set<ListenerCallback>} An array of handler functions.
+   * @private
+   */
+
+
+  _getEventListenersByType(type) {
+    if (!this._eventListenerRegistry.has(type)) {
+      this._eventListenerRegistry.set(type, new Set());
+    }
+
+    return this._eventListenerRegistry.get(type);
+  }
+
+}
+
+/*
+  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.
+*/
+/**
+ * Returns true if two URLs have the same `.href` property. The URLS can be
+ * relative, and if they are the current location href is used to resolve URLs.
+ *
+ * @private
+ * @param {string} url1
+ * @param {string} url2
+ * @return {boolean}
+ */
+
+function urlsMatch(url1, url2) {
+  const {
+    href
+  } = location;
+  return new URL(url1, href).href === new URL(url2, href).href;
+}
+
+/*
+  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.
+*/
+/**
+ * A minimal `Event` subclass shim.
+ * This doesn't *actually* subclass `Event` because not all browsers support
+ * constructable `EventTarget`, and using a real `Event` will error.
+ * @private
+ */
+
+class WorkboxEvent {
+  constructor(type, props) {
+    this.type = type;
+    Object.assign(this, props);
+  }
+
+}
+
+/*
+  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.
+*/
+// `skipWaiting()` wasn't called. This 200 amount wasn't scientifically
+// chosen, but it seems to avoid false positives in my testing.
+
+const WAITING_TIMEOUT_DURATION = 200; // The amount of time after a registration that we can reasonably conclude
+// that the registration didn't trigger an update.
+
+const REGISTRATION_TIMEOUT_DURATION = 60000;
+/**
+ * A class to aid in handling service worker registration, updates, and
+ * reacting to service worker lifecycle events.
+ *
+ * @fires [message]{@link module:workbox-window.Workbox#message}
+ * @fires [installed]{@link module:workbox-window.Workbox#installed}
+ * @fires [waiting]{@link module:workbox-window.Workbox#waiting}
+ * @fires [controlling]{@link module:workbox-window.Workbox#controlling}
+ * @fires [activated]{@link module:workbox-window.Workbox#activated}
+ * @fires [redundant]{@link module:workbox-window.Workbox#redundant}
+ * @fires [externalinstalled]{@link module:workbox-window.Workbox#externalinstalled}
+ * @fires [externalwaiting]{@link module:workbox-window.Workbox#externalwaiting}
+ * @fires [externalactivated]{@link module:workbox-window.Workbox#externalactivated}
+ * @memberof module:workbox-window
+ */
+
+class Workbox extends WorkboxEventTarget {
+  /**
+   * Creates a new Workbox instance with a script URL and service worker
+   * options. The script URL and options are the same as those used when
+   * calling `navigator.serviceWorker.register(scriptURL, options)`. See:
+   * https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/register
+   *
+   * @param {string} scriptURL The service worker script associated with this
+   *     instance.
+   * @param {Object} [registerOptions] The service worker options associated
+   *     with this instance.
+   */
+  constructor(scriptURL, registerOptions = {}) {
+    super();
+    this._registerOptions = {};
+    this._updateFoundCount = 0; // Deferreds we can resolve later.
+
+    this._swDeferred = new Deferred();
+    this._activeDeferred = new Deferred();
+    this._controllingDeferred = new Deferred();
+    this._registrationTime = 0;
+    this._ownSWs = new Set();
+    /**
+     * @private
+     */
+
+    this._onUpdateFound = () => {
+      // `this._registration` will never be `undefined` after an update is found.
+      const registration = this._registration;
+      const installingSW = 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:
+
+      const 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;
+        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._ownSWs.add(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
+     */
+
+
+    this._onStateChange = originalEvent => {
+      // `this._registration` will never be `undefined` after an update is found.
+      const registration = this._registration;
+      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 = self.setTimeout(() => {
+          // Ensure the SW is still waiting (it may now be redundant).
+          if (state === 'installed' && 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
+     */
+
+
+    this._onControllerChange = originalEvent => {
+      const sw = this._sw;
+
+      if (sw === navigator.serviceWorker.controller) {
+        this.dispatchEvent(new WorkboxEvent('controlling', {
+          sw,
+          originalEvent,
+          isUpdate: this._isUpdate
+        }));
+
+        {
+          logger.log('Registered service worker now controlling this page.');
+        }
+
+        this._controllingDeferred.resolve(sw);
+      }
+    };
+    /**
+     * @private
+     * @param {Event} originalEvent
+     */
+
+
+    this._onMessage = async originalEvent => {
+      const {
+        data,
+        source
+      } = originalEvent; // Wait until there's an "own" service worker. This is used to buffer
+      // `message` events that may be received prior to calling `register()`.
+
+      await this.getSW(); // If the service worker that sent the message is in the list of own
+      // service workers for this instance, dispatch a `message` event.
+      // NOTE: we check for all previously owned service workers rather than
+      // just the current one because some messages (e.g. cache updates) use
+      // a timeout when sent and may be delayed long enough for a service worker
+      // update to be found.
+
+      if (this._ownSWs.has(source)) {
+        this.dispatchEvent(new WorkboxEvent('message', {
+          data,
+          sw: source,
+          originalEvent
+        }));
+      }
+    };
+
+    this._scriptURL = scriptURL;
+    this._registerOptions = registerOptions; // Add a message listener immediately since messages received during
+    // page load are buffered only until the DOMContentLoaded event:
+    // https://github.com/GoogleChrome/workbox/issues/2202
+
+    navigator.serviceWorker.addEventListener('message', this._onMessage);
+  }
+  /**
+   * Registers a service worker for this instances script URL and service
+   * worker options. By default this method delays registration until after
+   * the window has loaded.
+   *
+   * @param {Object} [options]
+   * @param {Function} [options.immediate=false] Setting this to true will
+   *     register the service worker immediately, even if the window has
+   *     not loaded (not recommended).
+   */
+
+
+  async register({
+    immediate = false
+  } = {}) {
+    {
+      if (this._registrationTime) {
+        logger.error('Cannot re-register a Workbox instance after it has ' + 'been registered. Create a new instance instead.');
+        return;
+      }
+    }
+
+    if (!immediate && document.readyState !== 'complete') {
+      await new Promise(res => window.addEventListener('load', res));
+    } // Set this flag to true if any service worker was controlling the page
+    // at registration time.
+
+
+    this._isUpdate = Boolean(navigator.serviceWorker.controller); // Before registering, attempt to determine if a SW is already controlling
+    // the page, and if that SW script (and version, if specified) matches this
+    // instance's script.
+
+    this._compatibleControllingSW = this._getControllingSWIfCompatible();
+    this._registration = await this._registerScript(); // If we have a compatible controller, store the controller as the "own"
+    // SW, resolve active/controlling deferreds and add necessary listeners.
+
+    if (this._compatibleControllingSW) {
+      this._sw = this._compatibleControllingSW;
+
+      this._activeDeferred.resolve(this._compatibleControllingSW);
+
+      this._controllingDeferred.resolve(this._compatibleControllingSW);
+
+      this._compatibleControllingSW.addEventListener('statechange', this._onStateChange, {
+        once: true
+      });
+    } // If there's a waiting service worker with a matching URL before the
+    // `updatefound` event fires, it likely means that this site is open
+    // in another tab, or the user refreshed the page (and thus the previous
+    // page wasn't fully unloaded before this page started loading).
+    // https://developers.google.com/web/fundamentals/primers/service-workers/lifecycle#waiting
+
+
+    const waitingSW = this._registration.waiting;
+
+    if (waitingSW && urlsMatch(waitingSW.scriptURL, this._scriptURL)) {
+      // Store the waiting SW as the "own" Sw, even if it means overwriting
+      // a compatible controller.
+      this._sw = waitingSW; // Run this in the next microtask, so any code that adds an event
+      // listener after awaiting `register()` will get this event.
+
+      dontWaitFor(Promise.resolve().then(() => {
+        this.dispatchEvent(new WorkboxEvent('waiting', {
+          sw: waitingSW,
+          wasWaitingBeforeRegister: true
+        }));
+
+        {
+          logger.warn('A service worker was already waiting to activate ' + 'before this script was registered...');
+        }
+      }));
+    } // If an "own" SW is already set, resolve the deferred.
+
+
+    if (this._sw) {
+      this._swDeferred.resolve(this._sw);
+
+      this._ownSWs.add(this._sw);
+    }
+
+    {
+      logger.log('Successfully registered service worker.', this._scriptURL);
+
+      if (navigator.serviceWorker.controller) {
+        if (this._compatibleControllingSW) {
+          logger.debug('A service worker with the same script URL ' + 'is already controlling this page.');
+        } else {
+          logger.debug('A service worker with a different script URL is ' + 'currently controlling the page. The browser is now fetching ' + 'the new script now...');
+        }
+      }
+
+      const currentPageIsOutOfScope = () => {
+        const scopeURL = new URL(this._registerOptions.scope || this._scriptURL, document.baseURI);
+        const scopeURLBasePath = new URL('./', scopeURL.href).pathname;
+        return !location.pathname.startsWith(scopeURLBasePath);
+      };
+
+      if (currentPageIsOutOfScope()) {
+        logger.warn('The current page is not in scope for the registered ' + 'service worker. Was this a mistake?');
+      }
+    }
+
+    this._registration.addEventListener('updatefound', this._onUpdateFound);
+
+    navigator.serviceWorker.addEventListener('controllerchange', this._onControllerChange, {
+      once: true
+    });
+    return this._registration;
+  }
+  /**
+   * Checks for updates of the registered service worker.
+   */
+
+
+  async update() {
+    if (!this._registration) {
+      {
+        logger.error('Cannot update a Workbox instance without ' + 'being registered. Register the Workbox instance first.');
+      }
+
+      return;
+    } // Try to update registration
+
+
+    await this._registration.update();
+  }
+  /**
+   * Resolves to the service worker registered by this instance as soon as it
+   * is active. If a service worker was already controlling at registration
+   * time then it will resolve to that if the script URLs (and optionally
+   * script versions) match, otherwise it will wait until an update is found
+   * and activates.
+   *
+   * @return {Promise<ServiceWorker>}
+   */
+
+
+  get active() {
+    return this._activeDeferred.promise;
+  }
+  /**
+   * Resolves to the service worker registered by this instance as soon as it
+   * is controlling the page. If a service worker was already controlling at
+   * registration time then it will resolve to that if the script URLs (and
+   * optionally script versions) match, otherwise it will wait until an update
+   * is found and starts controlling the page.
+   * Note: the first time a service worker is installed it will active but
+   * not start controlling the page unless `clients.claim()` is called in the
+   * service worker.
+   *
+   * @return {Promise<ServiceWorker>}
+   */
+
+
+  get controlling() {
+    return this._controllingDeferred.promise;
+  }
+  /**
+   * Resolves with a reference to a service worker that matches the script URL
+   * of this instance, as soon as it's available.
+   *
+   * If, at registration time, there's already an active or waiting service
+   * worker with a matching script URL, it will be used (with the waiting
+   * service worker taking precedence over the active service worker if both
+   * match, since the waiting service worker would have been registered more
+   * recently).
+   * If there's no matching active or waiting service worker at registration
+   * time then the promise will not resolve until an update is found and starts
+   * installing, at which point the installing service worker is used.
+   *
+   * @return {Promise<ServiceWorker>}
+   */
+
+
+  async getSW() {
+    // If `this._sw` is set, resolve with that as we want `getSW()` to
+    // return the correct (new) service worker if an update is found.
+    return this._sw !== undefined ? this._sw : this._swDeferred.promise;
+  }
+  /**
+   * Sends the passed data object to the service worker registered by this
+   * instance (via [`getSW()`]{@link module:workbox-window.Workbox#getSW}) and resolves
+   * with a response (if any).
+   *
+   * A response can be set in a message handler in the service worker by
+   * calling `event.ports[0].postMessage(...)`, which will resolve the promise
+   * returned by `messageSW()`. If no response is set, the promise will never
+   * resolve.
+   *
+   * @param {Object} data An object to send to the service worker
+   * @return {Promise<Object>}
+   */
+
+
+  async messageSW(data) {
+    const sw = await this.getSW();
+    return messageSW(sw, data);
+  }
+  /**
+   * Checks for a service worker already controlling the page and returns
+   * it if its script URL matches.
+   *
+   * @private
+   * @return {ServiceWorker|undefined}
+   */
+
+
+  _getControllingSWIfCompatible() {
+    const controller = navigator.serviceWorker.controller;
+
+    if (controller && urlsMatch(controller.scriptURL, this._scriptURL)) {
+      return controller;
+    } else {
+      return undefined;
+    }
+  }
+  /**
+   * Registers a service worker for this instances script URL and register
+   * options and tracks the time registration was complete.
+   *
+   * @private
+   */
+
+
+  async _registerScript() {
+    try {
+      const reg = await navigator.serviceWorker.register(this._scriptURL, this._registerOptions); // Keep track of when registration happened, so it can be used in the
+      // `this._onUpdateFound` heuristic. Also use the presence of this
+      // property as a way to see if `.register()` has been called.
+
+      this._registrationTime = performance.now();
+      return reg;
+    } catch (error) {
+      {
+        logger.error(error);
+      } // Re-throw the error.
+
+
+      throw error;
+    }
+  }
+
+}
+// -----------------------------------------------------------------------
+
+/**
+ * The `message` event is dispatched any time a `postMessage` is received.
+ *
+ * @event module:workbox-window.Workbox#message
+ * @type {WorkboxEvent}
+ * @property {*} data The `data` property from the original `message` event.
+ * @property {Event} originalEvent The original [`message`]{@link https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent}
+ *     event.
+ * @property {string} type `message`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `installed` event is dispatched if the state of a
+ * [`Workbox`]{@link module:workbox-window.Workbox} instance's
+ * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}
+ * changes to `installed`.
+ *
+ * Then can happen either the very first time a service worker is installed,
+ * or after an update to the current service worker is found. In the case
+ * of an update being found, the event's `isUpdate` property will be `true`.
+ *
+ * @event module:workbox-window.Workbox#installed
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {boolean|undefined} isUpdate True if a service worker was already
+ *     controlling when this `Workbox` instance called `register()`.
+ * @property {string} type `installed`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `waiting` event is dispatched if the state of a
+ * [`Workbox`]{@link module:workbox-window.Workbox} instance's
+ * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}
+ * changes to `installed` and then doesn't immediately change to `activating`.
+ * It may also be dispatched if a service worker with the same
+ * [`scriptURL`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/scriptURL}
+ * was already waiting when the [`register()`]{@link module:workbox-window.Workbox#register}
+ * method was called.
+ *
+ * @event module:workbox-window.Workbox#waiting
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event|undefined} originalEvent The original
+ *    [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event, or `undefined` in the case where the service worker was waiting
+ *     to before `.register()` was called.
+ * @property {boolean|undefined} isUpdate True if a service worker was already
+ *     controlling when this `Workbox` instance called `register()`.
+ * @property {boolean|undefined} wasWaitingBeforeRegister True if a service worker with
+ *     a matching `scriptURL` was already waiting when this `Workbox`
+ *     instance called `register()`.
+ * @property {string} type `waiting`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `controlling` event is dispatched if a
+ * [`controllerchange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/oncontrollerchange}
+ * fires on the service worker [container]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer}
+ * and the [`scriptURL`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/scriptURL}
+ * of the new [controller]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/controller}
+ * matches the `scriptURL` of the `Workbox` instance's
+ * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}.
+ *
+ * @event module:workbox-window.Workbox#controlling
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`controllerchange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/oncontrollerchange}
+ *     event.
+ * @property {boolean|undefined} isUpdate True if a service worker was already
+ *     controlling when this service worker was registered.
+ * @property {string} type `controlling`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `activated` event is dispatched if the state of a
+ * [`Workbox`]{@link module:workbox-window.Workbox} instance's
+ * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}
+ * changes to `activated`.
+ *
+ * @event module:workbox-window.Workbox#activated
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {boolean|undefined} isUpdate True if a service worker was already
+ *     controlling when this `Workbox` instance called `register()`.
+ * @property {string} type `activated`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `redundant` event is dispatched if the state of a
+ * [`Workbox`]{@link module:workbox-window.Workbox} instance's
+ * [registered service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-precaching#def-registered-sw}
+ * changes to `redundant`.
+ *
+ * @event module:workbox-window.Workbox#redundant
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {boolean|undefined} isUpdate True if a service worker was already
+ *     controlling when this `Workbox` instance called `register()`.
+ * @property {string} type `redundant`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `externalinstalled` event is dispatched if the state of an
+ * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-window#when_an_unexpected_version_of_the_service_worker_is_found}
+ * changes to `installed`.
+ *
+ * @event module:workbox-window.Workbox#externalinstalled
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {string} type `externalinstalled`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `externalwaiting` event is dispatched if the state of an
+ * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-window#when_an_unexpected_version_of_the_service_worker_is_found}
+ * changes to `waiting`.
+ *
+ * @event module:workbox-window.Workbox#externalwaiting
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {string} type `externalwaiting`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+/**
+ * The `externalactivated` event is dispatched if the state of an
+ * [external service worker]{@link https://developers.google.com/web/tools/workbox/modules/workbox-window#when_an_unexpected_version_of_the_service_worker_is_found}
+ * changes to `activated`.
+ *
+ * @event module:workbox-window.Workbox#externalactivated
+ * @type {WorkboxEvent}
+ * @property {ServiceWorker} sw The service worker instance.
+ * @property {Event} originalEvent The original [`statechange`]{@link https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/onstatechange}
+ *     event.
+ * @property {string} type `externalactivated`.
+ * @property {Workbox} target The `Workbox` instance.
+ */
+
+export { Workbox, messageSW };
+

source/js/workbox/workbox-window.prod.mjs

@@ -0,0 +1,2 @@
+try{self["workbox:window:5.1.4"]&&_()}catch(t){}function t(t,s){return new Promise(i=>{const e=new MessageChannel;e.port1.onmessage=t=>{i(t.data)},t.postMessage(s,[e.port2])})}try{self["workbox:core:5.1.4"]&&_()}catch(t){}class s{constructor(){this.promise=new Promise((t,s)=>{this.resolve=t,this.reject=s})}}function i(t,s){const{href:i}=location;return new URL(t,i).href===new URL(s,i).href}class e{constructor(t,s){this.type=t,Object.assign(this,s)}}class h extends class{constructor(){this.t=new Map}addEventListener(t,s){this.s(t).add(s)}removeEventListener(t,s){this.s(t).delete(s)}dispatchEvent(t){t.target=this;const s=this.s(t.type);for(const i of s)i(t)}s(t){return this.t.has(t)||this.t.set(t,new Set),this.t.get(t)}}{constructor(t,h={}){super(),this.i={},this.h=0,this.o=new s,this.g=new s,this.l=new s,this.u=0,this.v=new Set,this.m=()=>{const t=this.p,s=t.installing;this.h>0||!i(s.scriptURL,this.S)||performance.now()>this.u+6e4?(this.L=s,t.removeEventListener("updatefound",this.m)):(this._=s,this.v.add(s),this.o.resolve(s)),++this.h,s.addEventListener("statechange",this.P)},this.P=t=>{const s=this.p,i=t.target,{state:h}=i,n=i===this.L,a=n?"external":"",r={sw:i,originalEvent:t};!n&&this.W&&(r.isUpdate=!0),this.dispatchEvent(new e(a+h,r)),"installed"===h?this.B=self.setTimeout(()=>{"installed"===h&&s.waiting===i&&this.dispatchEvent(new e(a+"waiting",r))},200):"activating"===h&&(clearTimeout(this.B),n||this.g.resolve(i))},this.C=t=>{const s=this._;s===navigator.serviceWorker.controller&&(this.dispatchEvent(new e("controlling",{sw:s,originalEvent:t,isUpdate:this.W})),this.l.resolve(s))},this.R=async t=>{const{data:s,source:i}=t;await this.getSW(),this.v.has(i)&&this.dispatchEvent(new e("message",{data:s,sw:i,originalEvent:t}))},this.S=t,this.i=h,navigator.serviceWorker.addEventListener("message",this.R)}async register({immediate:t=!1}={}){t||"complete"===document.readyState||await new Promise(t=>window.addEventListener("load",t)),this.W=Boolean(navigator.serviceWorker.controller),this.U=this.M(),this.p=await this.T(),this.U&&(this._=this.U,this.g.resolve(this.U),this.l.resolve(this.U),this.U.addEventListener("statechange",this.P,{once:!0}));const s=this.p.waiting;return s&&i(s.scriptURL,this.S)&&(this._=s,Promise.resolve().then(()=>{this.dispatchEvent(new e("waiting",{sw:s,wasWaitingBeforeRegister:!0}))}).then(()=>{})),this._&&(this.o.resolve(this._),this.v.add(this._)),this.p.addEventListener("updatefound",this.m),navigator.serviceWorker.addEventListener("controllerchange",this.C,{once:!0}),this.p}async update(){this.p&&await this.p.update()}get active(){return this.g.promise}get controlling(){return this.l.promise}async getSW(){return void 0!==this._?this._:this.o.promise}async messageSW(s){return t(await this.getSW(),s)}M(){const t=navigator.serviceWorker.controller;return t&&i(t.scriptURL,this.S)?t:void 0}async T(){try{const t=await navigator.serviceWorker.register(this.S,this.i);return this.u=performance.now(),t}catch(t){throw t}}}export{h as Workbox,t as messageSW};
+