@angular/service-worker
Version:
Angular - service worker tooling!
127 lines • 20.9 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { isPlatformBrowser } from '@angular/common';
import { APP_INITIALIZER, ApplicationRef, InjectionToken, Injector, NgModule, NgZone, PLATFORM_ID } from '@angular/core';
import { merge, of } from 'rxjs';
import { delay, filter, take } from 'rxjs/operators';
import { NgswCommChannel } from './low_level';
import { SwPush } from './push';
import { SwUpdate } from './update';
import * as i0 from "@angular/core";
/**
* Token that can be used to provide options for `ServiceWorkerModule` outside of
* `ServiceWorkerModule.register()`.
*
* You can use this token to define a provider that generates the registration options at runtime,
* for example via a function call:
*
* {@example service-worker/registration-options/module.ts region="registration-options"
* header="app.module.ts"}
*
* @publicApi
*/
export class SwRegistrationOptions {
}
export const SCRIPT = new InjectionToken('NGSW_REGISTER_SCRIPT');
export function ngswAppInitializer(injector, script, options, platformId) {
return () => {
if (!(isPlatformBrowser(platformId) && ('serviceWorker' in navigator) &&
options.enabled !== false)) {
return;
}
// Wait for service worker controller changes, and fire an INITIALIZE action when a new SW
// becomes active. This allows the SW to initialize itself even if there is no application
// traffic.
navigator.serviceWorker.addEventListener('controllerchange', () => {
if (navigator.serviceWorker.controller !== null) {
navigator.serviceWorker.controller.postMessage({ action: 'INITIALIZE' });
}
});
let readyToRegister$;
if (typeof options.registrationStrategy === 'function') {
readyToRegister$ = options.registrationStrategy();
}
else {
const [strategy, ...args] = (options.registrationStrategy || 'registerWhenStable:30000').split(':');
switch (strategy) {
case 'registerImmediately':
readyToRegister$ = of(null);
break;
case 'registerWithDelay':
readyToRegister$ = delayWithTimeout(+args[0] || 0);
break;
case 'registerWhenStable':
readyToRegister$ = !args[0] ? whenStable(injector) :
merge(whenStable(injector), delayWithTimeout(+args[0]));
break;
default:
// Unknown strategy.
throw new Error(`Unknown ServiceWorker registration strategy: ${options.registrationStrategy}`);
}
}
// Don't return anything to avoid blocking the application until the SW is registered.
// Also, run outside the Angular zone to avoid preventing the app from stabilizing (especially
// given that some registration strategies wait for the app to stabilize).
// Catch and log the error if SW registration fails to avoid uncaught rejection warning.
const ngZone = injector.get(NgZone);
ngZone.runOutsideAngular(() => readyToRegister$.pipe(take(1)).subscribe(() => navigator.serviceWorker.register(script, { scope: options.scope })
.catch(err => console.error('Service worker registration failed with:', err))));
};
}
function delayWithTimeout(timeout) {
return of(null).pipe(delay(timeout));
}
function whenStable(injector) {
const appRef = injector.get(ApplicationRef);
return appRef.isStable.pipe(filter(stable => stable));
}
export function ngswCommChannelFactory(opts, platformId) {
return new NgswCommChannel(isPlatformBrowser(platformId) && opts.enabled !== false ? navigator.serviceWorker :
undefined);
}
/**
* @publicApi
*/
export class ServiceWorkerModule {
/**
* Register the given Angular Service Worker script.
*
* If `enabled` is set to `false` in the given options, the module will behave as if service
* workers are not supported by the browser, and the service worker will not be registered.
*/
static register(script, opts = {}) {
return {
ngModule: ServiceWorkerModule,
providers: [
{ provide: SCRIPT, useValue: script },
{ provide: SwRegistrationOptions, useValue: opts },
{
provide: NgswCommChannel,
useFactory: ngswCommChannelFactory,
deps: [SwRegistrationOptions, PLATFORM_ID]
},
{
provide: APP_INITIALIZER,
useFactory: ngswAppInitializer,
deps: [Injector, SCRIPT, SwRegistrationOptions, PLATFORM_ID],
multi: true,
},
],
};
}
}
ServiceWorkerModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.1.3", ngImport: i0, type: ServiceWorkerModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });
ServiceWorkerModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "15.1.3", ngImport: i0, type: ServiceWorkerModule });
ServiceWorkerModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "15.1.3", ngImport: i0, type: ServiceWorkerModule, providers: [SwPush, SwUpdate] });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.1.3", ngImport: i0, type: ServiceWorkerModule, decorators: [{
type: NgModule,
args: [{
providers: [SwPush, SwUpdate],
}]
}] });
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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  return () => {\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}\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"]}