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feat: tree-shakeable providers API updates (#22655)

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Rename @Injectable({scope -> providedIn}).

Instead of {providedIn: APP_ROOT_SCOPE}, accept {providedIn: 'root'}.
Also, {providedIn: null} implies the injectable should not be added
to any scope.

PR Close #22655
This commit is contained in:
Alex Rickabaugh
2018-03-07 15:10:38 -08:00
committed by Kara Erickson
parent 21e44c6ba9
commit db56836425
29 changed files with 219 additions and 114 deletions
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18
packages/core/src/di/scope.ts
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@ -10,18 +10,10 @@ import {Type} from '../type';
import {InjectionToken} from './injection_token';
// APP_ROOT_SCOPE is cast as a Type to allow for its usage as the scope parameter of @Injectable().
/**
* A scope which targets the root injector.
*
* When specified as the `scope` parameter to `@Injectable` or `InjectionToken`, this special
* scope indicates the provider for the service or token being configured belongs in the root
* injector. This is loosely equivalent to the convention of having a `forRoot()` static
* function within a module that configures the provider, and expecting users to only import that
* module via its `forRoot()` function in the root injector.
*
* @experimental
* An internal token whose presence in an injector indicates that the injector should treat itself
* as a root scoped injector when processing requests for unknown tokens which may indicate
* they are provided in the root scope.
*/
export const APP_ROOT_SCOPE: Type<any> = new InjectionToken<boolean>(
'The presence of this token marks an injector as being the root injector.') as any;
export const APP_ROOT = new InjectionToken<boolean>(
'The presence of this token marks an injector as being the root injector.');