Add zoneless scheduler to Angular by default

packages/core/src/change_detection/scheduling/flags.ts

@@ -0,0 +1,10 @@
+/**
+ * @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
+ */
+
+/** Flag to enable/disable the zoneless scheduler as default provider with zone scheduling. */
+export const alwaysProvideZonelessScheduler = true;

packages/core/src/change_detection/scheduling/ng_zone_scheduling.ts

@@ -17,6 +17,7 @@ import {performanceMarkFeature} from '../../util/performance';
 import {NgZone} from '../../zone';
 import {InternalNgZoneOptions} from '../../zone/ng_zone';
 
+import {alwaysProvideZonelessScheduler} from './flags';
 import {ChangeDetectionScheduler, ZONELESS_SCHEDULER_DISABLED} from './zoneless_scheduling';
 import {ChangeDetectionSchedulerImpl} from './zoneless_scheduling_impl';
 
@@ -93,10 +94,12 @@ export function internalProvideZoneChangeDetection(
       }
     },
     {provide: INTERNAL_APPLICATION_ERROR_HANDLER, useFactory: ngZoneApplicationErrorHandlerFactory},
-    // Always disable scheduler whenever explicitly disabled, even if Hybrid was specified elsewhere
+    // Always disable scheduler whenever explicitly disabled, even if another place called
+    // `provideZoneChangeDetection` without the 'ignore' option.
     ignoreChangesOutsideZone === true ? {provide: ZONELESS_SCHEDULER_DISABLED, useValue: true} : [],
-    // Only provide scheduler when explicitly not disabled
-    ignoreChangesOutsideZone === false ?
+    // TODO(atscott): This should move to the same places that zone change detection is provided by
+    // default instead of being in the zone scheduling providers.
+    alwaysProvideZonelessScheduler || ignoreChangesOutsideZone === false ?
         {provide: ChangeDetectionScheduler, useExisting: ChangeDetectionSchedulerImpl} :
         [],
   ];

packages/core/test/application_ref_spec.ts

@@ -8,7 +8,7 @@
 
 import {DOCUMENT, ɵgetDOM as getDOM} from '@angular/common';
 import {ResourceLoader} from '@angular/compiler';
-import {APP_BOOTSTRAP_LISTENER, APP_INITIALIZER, ChangeDetectionStrategy, Compiler, CompilerFactory, Component, EnvironmentInjector, InjectionToken, LOCALE_ID, NgModule, NgZone, PlatformRef, RendererFactory2, TemplateRef, Type, ViewChild, ViewContainerRef} from '@angular/core';
+import {APP_BOOTSTRAP_LISTENER, APP_INITIALIZER, ChangeDetectionStrategy, Compiler, CompilerFactory, Component, EnvironmentInjector, InjectionToken, LOCALE_ID, NgModule, NgZone, PlatformRef, provideZoneChangeDetection, RendererFactory2, TemplateRef, Type, ViewChild, ViewContainerRef} from '@angular/core';
 import {ErrorHandler} from '@angular/core/src/error_handler';
 import {ComponentRef} from '@angular/core/src/linker/component_factory';
 import {createEnvironmentInjector, getLocaleId} from '@angular/core/src/render3';
@@ -771,6 +771,7 @@ describe('AppRef', () => {
   beforeEach(() => {
     stableCalled = false;
     TestBed.configureTestingModule({
+      providers: [provideZoneChangeDetection({ignoreChangesOutsideZone: true})],
       declarations: [
         SyncComp, MicroTaskComp, MacroTaskComp, MicroMacroTaskComp, MacroMicroTaskComp, ClickComp
       ],

packages/core/test/bundling/defer/bundle.golden_symbols.json

@@ -1370,6 +1370,9 @@
   {
     "name": "init_fields"
   },
+  {
+    "name": "init_flags"
+  },
   {
     "name": "init_forward_ref"
   },

packages/core/test/change_detection_scheduler_spec.ts

@@ -574,7 +574,9 @@ describe('Angular with scheduler and ZoneJS', () => {
         {providers: [{provide: ComponentFixtureAutoDetect, useValue: true}]});
   });
 
-  it('current default behavior requires updates inside Angular zone', async () => {
+  it('requires updates inside Angular zone when using ngZoneOnly', async () => {
+    TestBed.configureTestingModule(
+        {providers: [provideZoneChangeDetection({ignoreChangesOutsideZone: true})]});
     @Component({template: '{{thing()}}', standalone: true})
     class App {
       thing = signal('initial');
@@ -593,8 +595,6 @@ describe('Angular with scheduler and ZoneJS', () => {
   });
 
   it('updating signal outside of zone still schedules update when in hybrid mode', async () => {
-    TestBed.configureTestingModule(
-        {providers: [provideZoneChangeDetection({ignoreChangesOutsideZone: false})]});
     @Component({template: '{{thing()}}', standalone: true})
     class App {
       thing = signal('initial');

packages/router/src/router.ts

@@ -10,7 +10,6 @@ import {Location} from '@angular/common';
 import {
   inject,
   Injectable,
-  NgZone,
   Type,
   ɵConsole as Console,
   ɵPendingTasks as PendingTasks,
@@ -106,7 +105,6 @@ export class Router {
   }
   private disposed = false;
   private nonRouterCurrentEntryChangeSubscription?: SubscriptionLike;
-  private isNgZoneEnabled = false;
 
   private readonly console = inject(Console);
   private readonly stateManager = inject(StateManager);
@@ -186,8 +184,6 @@ export class Router {
   readonly componentInputBindingEnabled: boolean = !!inject(INPUT_BINDER, {optional: true});
 
   constructor() {
-    this.isNgZoneEnabled = inject(NgZone) instanceof NgZone && NgZone.isInAngularZone();
-
     this.resetConfig(this.config);
 
     this.navigationTransitions
@@ -522,14 +518,6 @@ export class Router {
       skipLocationChange: false,
     },
   ): Promise<boolean> {
-    if (typeof ngDevMode === 'undefined' || ngDevMode) {
-      if (this.isNgZoneEnabled && !NgZone.isInAngularZone()) {
-        this.console.warn(
-          `Navigation triggered outside Angular zone, did you forget to call 'ngZone.run()'?`,
-        );
-      }
-    }
-
     const urlTree = isUrlTree(url) ? url : this.parseUrl(url);
     const mergedTree = this.urlHandlingStrategy.merge(urlTree, this.rawUrlTree);
 

packages/service-worker/test/provider_spec.ts

@@ -166,7 +166,10 @@ const serviceWorkerModuleApi = 'ServiceWorkerModule';
             TestBed.configureTestingModule({
               providers: [
                 provideServiceWorker('sw.js'),
-                {provide: ApplicationRef, useValue: {isStable: isStableSub.asObservable()}},
+                {
+                  provide: ApplicationRef,
+                  useValue: {isStable: isStableSub.asObservable(), afterTick: new Subject()},
+                },
                 {provide: PLATFORM_ID, useValue: 'browser'},
                 {
                   provide: SwRegistrationOptions,
@@ -178,7 +181,10 @@ const serviceWorkerModuleApi = 'ServiceWorkerModule';
             TestBed.configureTestingModule({
               imports: [ServiceWorkerModule.register('sw.js')],
               providers: [
-                {provide: ApplicationRef, useValue: {isStable: isStableSub.asObservable()}},
+                {
+                  provide: ApplicationRef,
+                  useValue: {isStable: isStableSub.asObservable(), afterTick: new Subject()},
+                },
                 {provide: PLATFORM_ID, useValue: 'browser'},
                 {
                   provide: SwRegistrationOptions,