| 1 | {"version":3,"file":"service-worker.mjs","sources":["../../../../../../packages/service-worker/src/low_level.ts","../../../../../../packages/service-worker/src/push.ts","../../../../../../packages/service-worker/src/update.ts","../../../../../../packages/service-worker/src/module.ts","../../../../../../packages/service-worker/src/index.ts","../../../../../../packages/service-worker/public_api.ts","../../../../../../packages/service-worker/index.ts","../../../../../../packages/service-worker/service-worker.ts"],"sourcesContent":["/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {concat, ConnectableObservable, defer, fromEvent, Observable, of, throwError} from 'rxjs';\nimport {filter, map, publish, switchMap, take, tap} from 'rxjs/operators';\n\nexport const ERR_SW_NOT_SUPPORTED = 'Service workers are disabled or not supported by this browser';\n\n/**\n * An event emitted when a new version of the app is available.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @deprecated\n * This event is only emitted by the deprecated {@link SwUpdate#available}.\n * Use the {@link VersionReadyEvent} instead, which is emitted by {@link SwUpdate#versionUpdates}.\n * See {@link SwUpdate#available} docs for an example.\n *\n * @publicApi\n */\nexport interface UpdateAvailableEvent {\n type: 'UPDATE_AVAILABLE';\n current: {hash: string, appData?: Object};\n available: {hash: string, appData?: Object};\n}\n\n/**\n * An event emitted when a new version of the app has been downloaded and activated.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @deprecated\n * This event is only emitted by the deprecated {@link SwUpdate#activated}.\n * Use the return value of {@link SwUpdate#activateUpdate} instead.\n *\n * @publicApi\n */\nexport interface UpdateActivatedEvent {\n type: 'UPDATE_ACTIVATED';\n previous?: {hash: string, appData?: Object};\n current: {hash: string, appData?: Object};\n}\n\n/**\n * An event emitted when the service worker has checked the version of the app on the server and it\n * didn't find a new version that it doesn't have already downloaded.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\nexport interface NoNewVersionDetectedEvent {\n type: 'NO_NEW_VERSION_DETECTED';\n version: {hash: string; appData?: Object;};\n}\n\n/**\n * An event emitted when the service worker has detected a new version of the app on the server and\n * is about to start downloading it.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\nexport interface VersionDetectedEvent {\n type: 'VERSION_DETECTED';\n version: {hash: string; appData?: object;};\n}\n\n/**\n * An event emitted when the installation of a new version failed.\n * It may be used for logging/monitoring purposes.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\nexport interface VersionInstallationFailedEvent {\n type: 'VERSION_INSTALLATION_FAILED';\n version: {hash: string; appData?: object;};\n error: string;\n}\n\n/**\n * An event emitted when a new version of the app is available.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\nexport interface VersionReadyEvent {\n type: 'VERSION_READY';\n currentVersion: {hash: string; appData?: object;};\n latestVersion: {hash: string; appData?: object;};\n}\n\n\n/**\n * A union of all event types that can be emitted by\n * {@link api/service-worker/SwUpdate#versionUpdates SwUpdate#versionUpdates}.\n *\n * @publicApi\n */\nexport type VersionEvent =\n VersionDetectedEvent|VersionInstallationFailedEvent|VersionReadyEvent|NoNewVersionDetectedEvent;\n\n/**\n * An event emitted when the version of the app used by the service worker to serve this client is\n * in a broken state that cannot be recovered from and a full page reload is required.\n *\n * For example, the service worker may not be able to retrieve a required resource, neither from the\n * cache nor from the server. This could happen if a new version is deployed to the server and the\n * service worker cache has been partially cleaned by the browser, removing some files of a previous\n * app version but not all.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\nexport interface UnrecoverableStateEvent {\n type: 'UNRECOVERABLE_STATE';\n reason: string;\n}\n\n/**\n * An event emitted when a `PushEvent` is received by the service worker.\n */\nexport interface PushEvent {\n type: 'PUSH';\n data: any;\n}\n\nexport type IncomingEvent = UpdateActivatedEvent|UnrecoverableStateEvent|VersionEvent;\n\nexport interface TypedEvent {\n type: string;\n}\n\ntype OperationCompletedEvent = {\n type: 'OPERATION_COMPLETED'; nonce: number; result: boolean;\n}|{\n type: 'OPERATION_COMPLETED';\n nonce: number;\n result?: undefined;\n error: string;\n};\n\n\nfunction errorObservable(message: string): Observable<any> {\n return defer(() => throwError(new Error(message)));\n}\n\n/**\n * @publicApi\n */\nexport class NgswCommChannel {\n readonly worker: Observable<ServiceWorker>;\n\n readonly registration: Observable<ServiceWorkerRegistration>;\n\n readonly events: Observable<TypedEvent>;\n\n constructor(private serviceWorker: ServiceWorkerContainer|undefined) {\n if (!serviceWorker) {\n this.worker = this.events = this.registration = errorObservable(ERR_SW_NOT_SUPPORTED);\n } else {\n const controllerChangeEvents = fromEvent(serviceWorker, 'controllerchange');\n const controllerChanges = controllerChangeEvents.pipe(map(() => serviceWorker.controller));\n const currentController = defer(() => of(serviceWorker.controller));\n const controllerWithChanges = concat(currentController, controllerChanges);\n\n this.worker = controllerWithChanges.pipe(filter((c): c is ServiceWorker => !!c));\n\n this.registration = <Observable<ServiceWorkerRegistration>>(\n this.worker.pipe(switchMap(() => serviceWorker.getRegistration())));\n\n const rawEvents = fromEvent<MessageEvent>(serviceWorker, 'message');\n const rawEventPayload = rawEvents.pipe(map(event => event.data));\n const eventsUnconnected = rawEventPayload.pipe(filter(event => event && event.type));\n const events = eventsUnconnected.pipe(publish()) as ConnectableObservable<IncomingEvent>;\n events.connect();\n\n this.events = events;\n }\n }\n\n postMessage(action: string, payload: Object): Promise<void> {\n return this.worker\n .pipe(take(1), tap((sw: ServiceWorker) => {\n sw.postMessage({\n action,\n ...payload,\n });\n }))\n .toPromise()\n .then(() => undefined);\n }\n\n postMessageWithOperation(type: string, payload: Object, operationNonce: number):\n Promise<boolean> {\n const waitForOperationCompleted = this.waitForOperationCompleted(operationNonce);\n const postMessage = this.postMessage(type, payload);\n return Promise.all([postMessage, waitForOperationCompleted]).then(([, result]) => result);\n }\n\n generateNonce(): number {\n return Math.round(Math.random() * 10000000);\n }\n\n eventsOfType<T extends TypedEvent>(type: T['type']|T['type'][]): Observable<T> {\n let filterFn: (event: TypedEvent) => event is T;\n if (typeof type === 'string') {\n filterFn = (event: TypedEvent): event is T => event.type === type;\n } else {\n filterFn = (event: TypedEvent): event is T => type.includes(event.type);\n }\n return this.events.pipe(filter(filterFn));\n }\n\n nextEventOfType<T extends TypedEvent>(type: T['type']): Observable<T> {\n return this.eventsOfType(type).pipe(take(1));\n }\n\n waitForOperationCompleted(nonce: number): Promise<boolean> {\n return this.eventsOfType<OperationCompletedEvent>('OPERATION_COMPLETED')\n .pipe(filter(event => event.nonce === nonce), take(1), map(event => {\n if (event.result !== undefined) {\n return event.result;\n }\n throw new Error(event.error!);\n }))\n .toPromise();\n }\n\n get isEnabled(): boolean {\n return !!this.serviceWorker;\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {merge, NEVER, Observable, Subject} from 'rxjs';\nimport {map, switchMap, take} from 'rxjs/operators';\n\nimport {ERR_SW_NOT_SUPPORTED, NgswCommChannel, PushEvent} from './low_level';\n\n\n/**\n * Subscribe and listen to\n * [Web Push\n * Notifications](https://developer.mozilla.org/en-US/docs/Web/API/Push_API/Best_Practices) through\n * Angular Service Worker.\n *\n * @usageNotes\n *\n * You can inject a `SwPush` instance into any component or service\n * as a dependency.\n *\n * <code-example path=\"service-worker/push/module.ts\" region=\"inject-sw-push\"\n * header=\"app.component.ts\"></code-example>\n *\n * To subscribe, call `SwPush.requestSubscription()`, which asks the user for permission.\n * The call returns a `Promise` with a new\n * [`PushSubscription`](https://developer.mozilla.org/en-US/docs/Web/API/PushSubscription)\n * instance.\n *\n * <code-example path=\"service-worker/push/module.ts\" region=\"subscribe-to-push\"\n * header=\"app.component.ts\"></code-example>\n *\n * A request is rejected if the user denies permission, or if the browser\n * blocks or does not support the Push API or ServiceWorkers.\n * Check `SwPush.isEnabled` to confirm status.\n *\n * Invoke Push Notifications by pushing a message with the following payload.\n *\n * ```ts\n * {\n * \"notification\": {\n * \"actions\": NotificationAction[],\n * \"badge\": USVString,\n * \"body\": DOMString,\n * \"data\": any,\n * \"dir\": \"auto\"|\"ltr\"|\"rtl\",\n * \"icon\": USVString,\n * \"image\": USVString,\n * \"lang\": DOMString,\n * \"renotify\": boolean,\n * \"requireInteraction\": boolean,\n * \"silent\": boolean,\n * \"tag\": DOMString,\n * \"timestamp\": DOMTimeStamp,\n * \"title\": DOMString,\n * \"vibrate\": number[]\n * }\n * }\n * ```\n *\n * Only `title` is required. See `Notification`\n * [instance\n * properties](https://developer.mozilla.org/en-US/docs/Web/API/Notification#Instance_properties).\n *\n * While the subscription is active, Service Worker listens for\n * [PushEvent](https://developer.mozilla.org/en-US/docs/Web/API/PushEvent)\n * occurrences and creates\n * [Notification](https://developer.mozilla.org/en-US/docs/Web/API/Notification)\n * instances in response.\n *\n * Unsubscribe using `SwPush.unsubscribe()`.\n *\n * An application can subscribe to `SwPush.notificationClicks` observable to be notified when a user\n * clicks on a notification. For example:\n *\n * <code-example path=\"service-worker/push/module.ts\" region=\"subscribe-to-notification-clicks\"\n * header=\"app.component.ts\"></code-example>\n *\n * You can read more on handling notification clicks in the [Service worker notifications\n * guide](guide/service-worker-notifications).\n *\n * @see [Push Notifications](https://developers.google.com/web/fundamentals/codelabs/push-notifications/)\n * @see [Angular Push Notifications](https://blog.angular-university.io/angular-push-notifications/)\n * @see [MDN: Push API](https://developer.mozilla.org/en-US/docs/Web/API/Push_API)\n * @see [MDN: Notifications API](https://developer.mozilla.org/en-US/docs/Web/API/Notifications_API)\n * @see [MDN: Web Push API Notifications best practices](https://developer.mozilla.org/en-US/docs/Web/API/Push_API/Best_Practices)\n *\n * @publicApi\n */\n@Injectable()\nexport class SwPush {\n /**\n * Emits the payloads of the received push notification messages.\n */\n readonly messages: Observable<object>;\n\n /**\n * Emits the payloads of the received push notification messages as well as the action the user\n * interacted with. If no action was used the `action` property contains an empty string `''`.\n *\n * Note that the `notification` property does **not** contain a\n * [Notification][Mozilla Notification] object but rather a\n * [NotificationOptions](https://notifications.spec.whatwg.org/#dictdef-notificationoptions)\n * object that also includes the `title` of the [Notification][Mozilla Notification] object.\n *\n * [Mozilla Notification]: https://developer.mozilla.org/en-US/docs/Web/API/Notification\n */\n readonly notificationClicks: Observable<{\n action: string; notification: NotificationOptions &\n {\n title: string\n }\n }>;\n\n /**\n * Emits the currently active\n * [PushSubscription](https://developer.mozilla.org/en-US/docs/Web/API/PushSubscription)\n * associated to the Service Worker registration or `null` if there is no subscription.\n */\n readonly subscription: Observable<PushSubscription|null>;\n\n /**\n * True if the Service Worker is enabled (supported by the browser and enabled via\n * `ServiceWorkerModule`).\n */\n get isEnabled(): boolean {\n return this.sw.isEnabled;\n }\n\n // TODO(issue/24571): remove '!'.\n private pushManager!: Observable<PushManager>;\n private subscriptionChanges = new Subject<PushSubscription|null>();\n\n constructor(private sw: NgswCommChannel) {\n if (!sw.isEnabled) {\n this.messages = NEVER;\n this.notificationClicks = NEVER;\n this.subscription = NEVER;\n return;\n }\n\n this.messages = this.sw.eventsOfType<PushEvent>('PUSH').pipe(map(message => message.data));\n\n this.notificationClicks =\n this.sw.eventsOfType('NOTIFICATION_CLICK').pipe(map((message: any) => message.data));\n\n this.pushManager = this.sw.registration.pipe(map(registration => registration.pushManager));\n\n const workerDrivenSubscriptions = this.pushManager.pipe(switchMap(pm => pm.getSubscription()));\n this.subscription = merge(workerDrivenSubscriptions, this.subscriptionChanges);\n }\n\n /**\n * Subscribes to Web Push Notifications,\n * after requesting and receiving user permission.\n *\n * @param options An object containing the `serverPublicKey` string.\n * @returns A Promise that resolves to the new subscription object.\n */\n requestSubscription(options: {serverPublicKey: string}): Promise<PushSubscription> {\n if (!this.sw.isEnabled) {\n return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n }\n const pushOptions: PushSubscriptionOptionsInit = {userVisibleOnly: true};\n let key = this.decodeBase64(options.serverPublicKey.replace(/_/g, '/').replace(/-/g, '+'));\n let applicationServerKey = new Uint8Array(new ArrayBuffer(key.length));\n for (let i = 0; i < key.length; i++) {\n applicationServerKey[i] = key.charCodeAt(i);\n }\n pushOptions.applicationServerKey = applicationServerKey;\n\n return this.pushManager.pipe(switchMap(pm => pm.subscribe(pushOptions)), take(1))\n .toPromise()\n .then(sub => {\n this.subscriptionChanges.next(sub);\n return sub;\n });\n }\n\n /**\n * Unsubscribes from Service Worker push notifications.\n *\n * @returns A Promise that is resolved when the operation succeeds, or is rejected if there is no\n * active subscription or the unsubscribe operation fails.\n */\n unsubscribe(): Promise<void> {\n if (!this.sw.isEnabled) {\n return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n }\n\n const doUnsubscribe = (sub: PushSubscription|null) => {\n if (sub === null) {\n throw new Error('Not subscribed to push notifications.');\n }\n\n return sub.unsubscribe().then(success => {\n if (!success) {\n throw new Error('Unsubscribe failed!');\n }\n\n this.subscriptionChanges.next(null);\n });\n };\n\n return this.subscription.pipe(take(1), switchMap(doUnsubscribe)).toPromise();\n }\n\n private decodeBase64(input: string): string {\n return atob(input);\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {NEVER, Observable} from 'rxjs';\nimport {filter, map} from 'rxjs/operators';\n\nimport {ERR_SW_NOT_SUPPORTED, NgswCommChannel, UnrecoverableStateEvent, UpdateActivatedEvent, UpdateAvailableEvent, VersionEvent, VersionReadyEvent} from './low_level';\n\n\n\n/**\n * Subscribe to update notifications from the Service Worker, trigger update\n * checks, and forcibly activate updates.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\n@Injectable()\nexport class SwUpdate {\n /**\n * Emits a `VersionDetectedEvent` event whenever a new version is detected on the server.\n *\n * Emits a `VersionInstallationFailedEvent` event whenever checking for or downloading a new\n * version fails.\n *\n * Emits a `VersionReadyEvent` event whenever a new version has been downloaded and is ready for\n * activation.\n */\n readonly versionUpdates: Observable<VersionEvent>;\n\n /**\n * Emits an `UpdateAvailableEvent` event whenever a new app version is available.\n *\n * @deprecated Use {@link versionUpdates} instead.\n *\n * The of behavior `available` can be rebuild by filtering for the `VersionReadyEvent`:\n * ```\n * import {filter, map} from 'rxjs/operators';\n * // ...\n * const updatesAvailable = swUpdate.versionUpdates.pipe(\n * filter((evt): evt is VersionReadyEvent => evt.type === 'VERSION_READY'),\n * map(evt => ({\n * type: 'UPDATE_AVAILABLE',\n * current: evt.currentVersion,\n * available: evt.latestVersion,\n * })));\n * ```\n */\n readonly available: Observable<UpdateAvailableEvent>;\n\n /**\n * Emits an `UpdateActivatedEvent` event whenever the app has been updated to a new version.\n *\n * @deprecated Use the return value of {@link SwUpdate#activateUpdate} instead.\n *\n */\n readonly activated: Observable<UpdateActivatedEvent>;\n\n /**\n * Emits an `UnrecoverableStateEvent` event whenever the version of the app used by the service\n * worker to serve this client is in a broken state that cannot be recovered from without a full\n * page reload.\n */\n readonly unrecoverable: Observable<UnrecoverableStateEvent>;\n\n /**\n * True if the Service Worker is enabled (supported by the browser and enabled via\n * `ServiceWorkerModule`).\n */\n get isEnabled(): boolean {\n return this.sw.isEnabled;\n }\n\n constructor(private sw: NgswCommChannel) {\n if (!sw.isEnabled) {\n this.versionUpdates = NEVER;\n this.available = NEVER;\n this.activated = NEVER;\n this.unrecoverable = NEVER;\n return;\n }\n this.versionUpdates = this.sw.eventsOfType<VersionEvent>([\n 'VERSION_DETECTED',\n 'VERSION_INSTALLATION_FAILED',\n 'VERSION_READY',\n 'NO_NEW_VERSION_DETECTED',\n ]);\n this.available = this.versionUpdates.pipe(\n filter((evt: VersionEvent): evt is VersionReadyEvent => evt.type === 'VERSION_READY'),\n map(evt => ({\n type: 'UPDATE_AVAILABLE',\n current: evt.currentVersion,\n available: evt.latestVersion,\n })));\n this.activated = this.sw.eventsOfType<UpdateActivatedEvent>('UPDATE_ACTIVATED');\n this.unrecoverable = this.sw.eventsOfType<UnrecoverableStateEvent>('UNRECOVERABLE_STATE');\n }\n\n /**\n * Checks for an update and waits until the new version is downloaded from the server and ready\n * for activation.\n *\n * @returns a promise that\n * - resolves to `true` if a new version was found and is ready to be activated.\n * - resolves to `false` if no new version was found\n * - rejects if any error occurs\n */\n checkForUpdate(): Promise<boolean> {\n if (!this.sw.isEnabled) {\n return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n }\n const nonce = this.sw.generateNonce();\n return this.sw.postMessageWithOperation('CHECK_FOR_UPDATES', {nonce}, nonce);\n }\n\n /**\n * Updates the current client (i.e. browser tab) to the latest version that is ready for\n * activation.\n *\n * @returns a promise that\n * - resolves to `true` if an update was activated successfully\n * - resolves to `false` if no update was available (for example, the client was already on the\n * latest version).\n * - rejects if any error occurs\n */\n activateUpdate(): Promise<boolean> {\n if (!this.sw.isEnabled) {\n return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n }\n const nonce = this.sw.generateNonce();\n return this.sw.postMessageWithOperation('ACTIVATE_UPDATE', {nonce}, nonce);\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {isPlatformBrowser} from '@angular/common';\nimport {APP_INITIALIZER, ApplicationRef, InjectionToken, Injector, ModuleWithProviders, NgModule, NgZone, PLATFORM_ID} from '@angular/core';\nimport {merge, Observable, of} from 'rxjs';\nimport {delay, filter, take} from 'rxjs/operators';\n\nimport {NgswCommChannel} from './low_level';\nimport {SwPush} from './push';\nimport {SwUpdate} from './update';\n\n/**\n * Token that can be used to provide options for `ServiceWorkerModule` outside of\n * `ServiceWorkerModule.register()`.\n *\n * You can use this token to define a provider that generates the registration options at runtime,\n * for example via a function call:\n *\n * {@example service-worker/registration-options/module.ts region=\"registration-options\"\n * header=\"app.module.ts\"}\n *\n * @publicApi\n */\nexport abstract class SwRegistrationOptions {\n /**\n * Whether the ServiceWorker will be registered and the related services (such as `SwPush` and\n * `SwUpdate`) will attempt to communicate and interact with it.\n *\n * Default: true\n */\n enabled?: boolean;\n\n /**\n * A URL that defines the ServiceWorker's registration scope; that is, what range of URLs it can\n * control. It will be used when calling\n * [ServiceWorkerContainer#register()](https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/register).\n */\n scope?: string;\n\n /**\n * Defines the ServiceWorker registration strategy, which determines when it will be registered\n * with the browser.\n *\n * The default behavior of registering once the application stabilizes (i.e. as soon as there are\n * no pending micro- and macro-tasks) is designed to register the ServiceWorker as soon as\n * possible but without affecting the application's first time load.\n *\n * Still, there might be cases where you want more control over when the ServiceWorker is\n * registered (for example, there might be a long-running timeout or polling interval, preventing\n * the app from stabilizing). The available option are:\n *\n * - `registerWhenStable:<timeout>`: Register as soon as the application stabilizes (no pending\n * micro-/macro-tasks) but no later than `<timeout>` milliseconds. If the app hasn't\n * stabilized after `<timeout>` milliseconds (for example, due to a recurrent asynchronous\n * task), the ServiceWorker will be registered anyway.\n * If `<timeout>` is omitted, the ServiceWorker will only be registered once the app\n * stabilizes.\n * - `registerImmediately`: Register immediately.\n * - `registerWithDelay:<timeout>`: Register with a delay of `<timeout>` milliseconds. For\n * example, use `registerWithDelay:5000` to register the ServiceWorker after 5 seconds. If\n * `<timeout>` is omitted, is defaults to `0`, which will register the ServiceWorker as soon\n * as possible but still asynchronously, once all pending micro-tasks are completed.\n * - An [Observable](guide/observables) factory function: A function that returns an `Observable`.\n * The function will be used at runtime to obtain and subscribe to the `Observable` and the\n * ServiceWorker will be registered as soon as the first value is emitted.\n *\n * Default: 'registerWhenStable:30000'\n */\n registrationStrategy?: string|(() => Observable<unknown>);\n}\n\nexport const SCRIPT = new InjectionToken<string>('NGSW_REGISTER_SCRIPT');\n\nexport function ngswAppInitializer(\n injector: Injector, script: string, options: SwRegistrationOptions,\n platformId: string): Function {\n const initializer = () => {\n if (!(isPlatformBrowser(platformId) && ('serviceWorker' in navigator) &&\n options.enabled !== false)) {\n return;\n }\n\n // Wait for service worker controller changes, and fire an INITIALIZE action when a new SW\n // becomes active. This allows the SW to initialize itself even if there is no application\n // traffic.\n navigator.serviceWorker.addEventListener('controllerchange', () => {\n if (navigator.serviceWorker.controller !== null) {\n navigator.serviceWorker.controller.postMessage({action: 'INITIALIZE'});\n }\n });\n\n let readyToRegister$: Observable<unknown>;\n\n if (typeof options.registrationStrategy === 'function') {\n readyToRegister$ = options.registrationStrategy();\n } else {\n const [strategy, ...args] =\n (options.registrationStrategy || 'registerWhenStable:30000').split(':');\n\n switch (strategy) {\n case 'registerImmediately':\n readyToRegister$ = of(null);\n break;\n case 'registerWithDelay':\n readyToRegister$ = delayWithTimeout(+args[0] || 0);\n break;\n case 'registerWhenStable':\n readyToRegister$ = !args[0] ? whenStable(injector) :\n merge(whenStable(injector), delayWithTimeout(+args[0]));\n break;\n default:\n // Unknown strategy.\n throw new Error(\n `Unknown ServiceWorker registration strategy: ${options.registrationStrategy}`);\n }\n }\n\n // Don't return anything to avoid blocking the application until the SW is registered.\n // Also, run outside the Angular zone to avoid preventing the app from stabilizing (especially\n // given that some registration strategies wait for the app to stabilize).\n // Catch and log the error if SW registration fails to avoid uncaught rejection warning.\n const ngZone = injector.get(NgZone);\n ngZone.runOutsideAngular(\n () => readyToRegister$.pipe(take(1)).subscribe(\n () =>\n navigator.serviceWorker.register(script, {scope: options.scope})\n .catch(err => console.error('Service worker registration failed with:', err))));\n };\n return initializer;\n}\n\nfunction delayWithTimeout(timeout: number): Observable<unknown> {\n return of(null).pipe(delay(timeout));\n}\n\nfunction whenStable(injector: Injector): Observable<unknown> {\n const appRef = injector.get(ApplicationRef);\n return appRef.isStable.pipe(filter(stable => stable));\n}\n\nexport function ngswCommChannelFactory(\n opts: SwRegistrationOptions, platformId: string): NgswCommChannel {\n return new NgswCommChannel(\n isPlatformBrowser(platformId) && opts.enabled !== false ? navigator.serviceWorker :\n undefined);\n}\n\n/**\n * @publicApi\n */\n@NgModule({\n providers: [SwPush, SwUpdate],\n})\nexport class ServiceWorkerModule {\n /**\n * Register the given Angular Service Worker script.\n *\n * If `enabled` is set to `false` in the given options, the module will behave as if service\n * workers are not supported by the browser, and the service worker will not be registered.\n */\n static register(script: string, opts: SwRegistrationOptions = {}):\n ModuleWithProviders<ServiceWorkerModule> {\n return {\n ngModule: ServiceWorkerModule,\n providers: [\n {provide: SCRIPT, useValue: script},\n {provide: SwRegistrationOptions, useValue: opts},\n {\n provide: NgswCommChannel,\n useFactory: ngswCommChannelFactory,\n deps: [SwRegistrationOptions, PLATFORM_ID]\n },\n {\n provide: APP_INITIALIZER,\n useFactory: ngswAppInitializer,\n deps: [Injector, SCRIPT, SwRegistrationOptions, PLATFORM_ID],\n multi: true,\n },\n ],\n };\n }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {UnrecoverableStateEvent, UpdateActivatedEvent, UpdateAvailableEvent, VersionDetectedEvent, VersionEvent, VersionInstallationFailedEvent, VersionReadyEvent,} from './low_level';\nexport {ServiceWorkerModule, SwRegistrationOptions} from './module';\nexport {SwPush} from './push';\nexport {SwUpdate} from './update';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * @module\n * @description\n * Entry point for all public APIs of this package.\n */\nexport * from './src/index';\n\n// This file only reexports content of the `src` folder. 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