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+this.workbox = this.workbox || {};
+this.workbox.strategies = (function (exports, logger_mjs, assert_mjs, cacheNames_mjs, cacheWrapper_mjs, fetchWrapper_mjs, getFriendlyURL_mjs, WorkboxError_mjs) {
+ 'use strict';
+
+ try {
+ self['workbox:strategies:4.3.1'] && _();
+ } catch (e) {} // eslint-disable-line
+
+ /*
+ 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 getFriendlyURL = url => {
+ const urlObj = new URL(url, location);
+
+ if (urlObj.origin === location.origin) {
+ return urlObj.pathname;
+ }
+
+ return urlObj.href;
+ };
+
+ const messages = {
+ strategyStart: (strategyName, request) => `Using ${strategyName} to ` + `respond to '${getFriendlyURL(request.url)}'`,
+ printFinalResponse: response => {
+ if (response) {
+ logger_mjs.logger.groupCollapsed(`View the final response here.`);
+ logger_mjs.logger.log(response);
+ logger_mjs.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 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 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_mjs.cacheNames.getRuntimeName(options.cacheName);
+ this._plugins = options.plugins || [];
+ this._fetchOptions = options.fetchOptions || null;
+ this._matchOptions = options.matchOptions || null;
+ }
+ /**
+ * This method will perform a request strategy and follows an API that
+ * will work with the
+ * [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * @param {Object} options
+ * @param {Request} 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
+ }) {
+ return this.makeRequest({
+ event,
+ request: request || event.request
+ });
+ }
+ /**
+ * This method can be used to perform a make a standalone request outside the
+ * context of the [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
+ * for more usage information.
+ *
+ * @param {Object} options
+ * @param {Request|string} options.request Either a
+ * [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
+ * object, or a string URL, corresponding to the request to be made.
+ * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
+ be called automatically to extend the service worker's lifetime.
+ * @return {Promise<Response>}
+ */
+
+
+ async makeRequest({
+ event,
+ request
+ }) {
+ const logs = [];
+
+ if (typeof request === 'string') {
+ request = new Request(request);
+ }
+
+ {
+ assert_mjs.assert.isInstance(request, Request, {
+ moduleName: 'workbox-strategies',
+ className: 'CacheFirst',
+ funcName: 'makeRequest',
+ paramName: 'request'
+ });
+ }
+
+ let response = await cacheWrapper_mjs.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_mjs.logger.groupCollapsed(messages.strategyStart('CacheFirst', request));
+
+ for (let log of logs) {
+ logger_mjs.logger.log(log);
+ }
+
+ messages.printFinalResponse(response);
+ logger_mjs.logger.groupEnd();
+ }
+
+ if (!response) {
+ throw new WorkboxError_mjs.WorkboxError('no-response', {
+ url: request.url,
+ error
+ });
+ }
+
+ return response;
+ }
+ /**
+ * Handles the network and cache part of CacheFirst.
+ *
+ * @param {Request} request
+ * @param {FetchEvent} [event]
+ * @return {Promise<Response>}
+ *
+ * @private
+ */
+
+
+ async _getFromNetwork(request, event) {
+ const response = await fetchWrapper_mjs.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_mjs.cacheWrapper.put({
+ cacheName: this._cacheName,
+ request,
+ response: responseClone,
+ event,
+ plugins: this._plugins
+ });
+
+ if (event) {
+ try {
+ event.waitUntil(cachePutPromise);
+ } catch (error) {
+ {
+ logger_mjs.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_mjs.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 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 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_mjs.cacheNames.getRuntimeName(options.cacheName);
+ this._plugins = options.plugins || [];
+ this._matchOptions = options.matchOptions || null;
+ }
+ /**
+ * This method will perform a request strategy and follows an API that
+ * will work with the
+ * [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * @param {Object} options
+ * @param {Request} 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
+ }) {
+ return this.makeRequest({
+ event,
+ request: request || event.request
+ });
+ }
+ /**
+ * This method can be used to perform a make a standalone request outside the
+ * context of the [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
+ * for more usage information.
+ *
+ * @param {Object} options
+ * @param {Request|string} options.request Either a
+ * [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
+ * object, or a string URL, corresponding to the request to be made.
+ * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
+ * be called automatically to extend the service worker's lifetime.
+ * @return {Promise<Response>}
+ */
+
+
+ async makeRequest({
+ event,
+ request
+ }) {
+ if (typeof request === 'string') {
+ request = new Request(request);
+ }
+
+ {
+ assert_mjs.assert.isInstance(request, Request, {
+ moduleName: 'workbox-strategies',
+ className: 'CacheOnly',
+ funcName: 'makeRequest',
+ paramName: 'request'
+ });
+ }
+
+ const response = await cacheWrapper_mjs.cacheWrapper.match({
+ cacheName: this._cacheName,
+ request,
+ event,
+ matchOptions: this._matchOptions,
+ plugins: this._plugins
+ });
+
+ {
+ logger_mjs.logger.groupCollapsed(messages.strategyStart('CacheOnly', request));
+
+ if (response) {
+ logger_mjs.logger.log(`Found a cached response in the '${this._cacheName}'` + ` cache.`);
+ messages.printFinalResponse(response);
+ } else {
+ logger_mjs.logger.log(`No response found in the '${this._cacheName}' cache.`);
+ }
+
+ logger_mjs.logger.groupEnd();
+ }
+
+ if (!response) {
+ throw new WorkboxError_mjs.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: ({
+ 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 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 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_mjs.cacheNames.getRuntimeName(options.cacheName);
+
+ if (options.plugins) {
+ let 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;
+
+ {
+ if (this._networkTimeoutSeconds) {
+ assert_mjs.assert.isType(this._networkTimeoutSeconds, 'number', {
+ moduleName: 'workbox-strategies',
+ className: 'NetworkFirst',
+ funcName: 'constructor',
+ paramName: 'networkTimeoutSeconds'
+ });
+ }
+ }
+
+ this._fetchOptions = options.fetchOptions || null;
+ this._matchOptions = options.matchOptions || null;
+ }
+ /**
+ * This method will perform a request strategy and follows an API that
+ * will work with the
+ * [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * @param {Object} options
+ * @param {Request} 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
+ }) {
+ return this.makeRequest({
+ event,
+ request: request || event.request
+ });
+ }
+ /**
+ * This method can be used to perform a make a standalone request outside the
+ * context of the [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
+ * for more usage information.
+ *
+ * @param {Object} options
+ * @param {Request|string} options.request Either a
+ * [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
+ * object, or a string URL, corresponding to the request to be made.
+ * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
+ * be called automatically to extend the service worker's lifetime.
+ * @return {Promise<Response>}
+ */
+
+
+ async makeRequest({
+ event,
+ request
+ }) {
+ const logs = [];
+
+ if (typeof request === 'string') {
+ request = new Request(request);
+ }
+
+ {
+ assert_mjs.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_mjs.logger.groupCollapsed(messages.strategyStart('NetworkFirst', request));
+
+ for (let log of logs) {
+ logger_mjs.logger.log(log);
+ }
+
+ messages.printFinalResponse(response);
+ logger_mjs.logger.groupEnd();
+ }
+
+ if (!response) {
+ throw new WorkboxError_mjs.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_mjs.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_mjs.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_mjs.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_mjs.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_mjs.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 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 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._cacheName = cacheNames_mjs.cacheNames.getRuntimeName(options.cacheName);
+ this._plugins = options.plugins || [];
+ this._fetchOptions = options.fetchOptions || null;
+ }
+ /**
+ * This method will perform a request strategy and follows an API that
+ * will work with the
+ * [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * @param {Object} options
+ * @param {Request} 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
+ }) {
+ return this.makeRequest({
+ event,
+ request: request || event.request
+ });
+ }
+ /**
+ * This method can be used to perform a make a standalone request outside the
+ * context of the [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
+ * for more usage information.
+ *
+ * @param {Object} options
+ * @param {Request|string} options.request Either a
+ * [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
+ * object, or a string URL, corresponding to the request to be made.
+ * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
+ * be called automatically to extend the service worker's lifetime.
+ * @return {Promise<Response>}
+ */
+
+
+ async makeRequest({
+ event,
+ request
+ }) {
+ if (typeof request === 'string') {
+ request = new Request(request);
+ }
+
+ {
+ assert_mjs.assert.isInstance(request, Request, {
+ moduleName: 'workbox-strategies',
+ className: 'NetworkOnly',
+ funcName: 'handle',
+ paramName: 'request'
+ });
+ }
+
+ let error;
+ let response;
+
+ try {
+ response = await fetchWrapper_mjs.fetchWrapper.fetch({
+ request,
+ event,
+ fetchOptions: this._fetchOptions,
+ plugins: this._plugins
+ });
+ } catch (err) {
+ error = err;
+ }
+
+ {
+ logger_mjs.logger.groupCollapsed(messages.strategyStart('NetworkOnly', request));
+
+ if (response) {
+ logger_mjs.logger.log(`Got response from network.`);
+ } else {
+ logger_mjs.logger.log(`Unable to get a response from the network.`);
+ }
+
+ messages.printFinalResponse(response);
+ logger_mjs.logger.groupEnd();
+ }
+
+ if (!response) {
+ throw new WorkboxError_mjs.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 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 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 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_mjs.cacheNames.getRuntimeName(options.cacheName);
+ this._plugins = options.plugins || [];
+
+ if (options.plugins) {
+ let 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 || null;
+ this._matchOptions = options.matchOptions || null;
+ }
+ /**
+ * This method will perform a request strategy and follows an API that
+ * will work with the
+ * [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * @param {Object} options
+ * @param {Request} 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
+ }) {
+ return this.makeRequest({
+ event,
+ request: request || event.request
+ });
+ }
+ /**
+ * This method can be used to perform a make a standalone request outside the
+ * context of the [Workbox Router]{@link workbox.routing.Router}.
+ *
+ * See "[Advanced Recipes](https://developers.google.com/web/tools/workbox/guides/advanced-recipes#make-requests)"
+ * for more usage information.
+ *
+ * @param {Object} options
+ * @param {Request|string} options.request Either a
+ * [`Request`]{@link https://developer.mozilla.org/en-US/docs/Web/API/Request}
+ * object, or a string URL, corresponding to the request to be made.
+ * @param {FetchEvent} [options.event] If provided, `event.waitUntil()` will
+ * be called automatically to extend the service worker's lifetime.
+ * @return {Promise<Response>}
+ */
+
+
+ async makeRequest({
+ event,
+ request
+ }) {
+ const logs = [];
+
+ if (typeof request === 'string') {
+ request = new Request(request);
+ }
+
+ {
+ assert_mjs.assert.isInstance(request, Request, {
+ moduleName: 'workbox-strategies',
+ className: 'StaleWhileRevalidate',
+ funcName: 'handle',
+ paramName: 'request'
+ });
+ }
+
+ const fetchAndCachePromise = this._getFromNetwork({
+ request,
+ event
+ });
+
+ let response = await cacheWrapper_mjs.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_mjs.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_mjs.getFriendlyURL(request.url)}'.`);
+ }
+ }
+ }
+ } else {
+ {
+ logs.push(`No response found in the '${this._cacheName}' cache. ` + `Will wait for the network response.`);
+ }
+
+ try {
+ response = await fetchAndCachePromise;
+ } catch (err) {
+ error = err;
+ }
+ }
+
+ {
+ logger_mjs.logger.groupCollapsed(messages.strategyStart('StaleWhileRevalidate', request));
+
+ for (let log of logs) {
+ logger_mjs.logger.log(log);
+ }
+
+ messages.printFinalResponse(response);
+ logger_mjs.logger.groupEnd();
+ }
+
+ if (!response) {
+ throw new WorkboxError_mjs.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_mjs.fetchWrapper.fetch({
+ request,
+ event,
+ fetchOptions: this._fetchOptions,
+ plugins: this._plugins
+ });
+ const cachePutPromise = cacheWrapper_mjs.cacheWrapper.put({
+ cacheName: this._cacheName,
+ request,
+ response: response.clone(),
+ event,
+ plugins: this._plugins
+ });
+
+ if (event) {
+ try {
+ event.waitUntil(cachePutPromise);
+ } catch (error) {
+ {
+ logger_mjs.logger.warn(`Unable to ensure service worker stays alive when ` + `updating cache for '${getFriendlyURL_mjs.getFriendlyURL(request.url)}'.`);
+ }
+ }
+ }
+
+ return response;
+ }
+
+ }
+
+ /*
+ Copyright 2018 Google LLC
+
+ Use of this source code is governed by an MIT-style
+ license that can be found in the LICENSE file or at
+ https://opensource.org/licenses/MIT.
+ */
+ const mapping = {
+ cacheFirst: CacheFirst,
+ cacheOnly: CacheOnly,
+ networkFirst: NetworkFirst,
+ networkOnly: NetworkOnly,
+ staleWhileRevalidate: StaleWhileRevalidate
+ };
+
+ const deprecate = strategy => {
+ const StrategyCtr = mapping[strategy];
+ return options => {
+ {
+ const strategyCtrName = strategy[0].toUpperCase() + strategy.slice(1);
+ logger_mjs.logger.warn(`The 'workbox.strategies.${strategy}()' function has been ` + `deprecated and will be removed in a future version of Workbox.\n` + `Please use 'new workbox.strategies.${strategyCtrName}()' instead.`);
+ }
+
+ return new StrategyCtr(options);
+ };
+ };
+ /**
+ * @function workbox.strategies.cacheFirst
+ * @param {Object} options See the {@link workbox.strategies.C