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feat: allow direct scoping of @Injectables to the root injector (#22185)

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@Injectable() supports a scope parameter which specifies the target module.
However, it's still difficult to specify that a particular service belongs
in the root injector. A developer attempting to ensure that must either
also provide a module intended for placement in the root injector or target
a module known to already be in the root injector (e.g. BrowserModule).
Both of these strategies are cumbersome and brittle.

Instead, this commit adds a token APP_ROOT_SCOPE which provides a
straightforward way of targeting the root injector directly, without
requiring special knowledge of modules within it.

PR Close #22185
This commit is contained in:
Alex Rickabaugh
2018-02-12 15:23:46 -08:00
committed by Victor Berchet
parent 029dbf0e18
commit 7ac34e42a0
12 changed files with 152 additions and 3 deletions
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3
packages/platform-browser/src/browser.ts
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@ -7,7 +7,7 @@
*/
import {CommonModule, PlatformLocation, ɵPLATFORM_BROWSER_ID as PLATFORM_BROWSER_ID} from '@angular/common';
import {APP_ID, ApplicationModule, ErrorHandler, ModuleWithProviders, NgModule, Optional, PLATFORM_ID, PLATFORM_INITIALIZER, PlatformRef, RendererFactory2, RootRenderer, Sanitizer, SkipSelf, StaticProvider, Testability, createPlatformFactory, platformCore} from '@angular/core';
import {APP_ID, APP_ROOT_SCOPE, ApplicationModule, ErrorHandler, ModuleWithProviders, NgModule, Optional, PLATFORM_ID, PLATFORM_INITIALIZER, PlatformRef, RendererFactory2, RootRenderer, Sanitizer, SkipSelf, StaticProvider, Testability, createPlatformFactory, platformCore} from '@angular/core';
import {BrowserDomAdapter} from './browser/browser_adapter';
import {BrowserPlatformLocation} from './browser/location/browser_platform_location';
@ -71,6 +71,7 @@ export function _document(): any {
@NgModule({
providers: [
BROWSER_SANITIZATION_PROVIDERS,
{provide: APP_ROOT_SCOPE, useValue: true},
{provide: ErrorHandler, useFactory: errorHandler, deps: []},
{provide: EVENT_MANAGER_PLUGINS, useClass: DomEventsPlugin, multi: true},
{provide: EVENT_MANAGER_PLUGINS, useClass: KeyEventsPlugin, multi: true},