angular-cn/modules/@angular/docs/cheatsheet/dependency-injection.md

1.0 KiB

@cheatsheetSection Dependency injection configuration @cheatsheetIndex 9 @description {@target ts}import {provide} from 'angular2/core';{@endtarget} {@target js}Available from the ng.core namespace{@endtarget} {@target dart}import 'package:angular2/core.dart';{@endtarget}

@cheatsheetItem syntax(ts dart): provide(MyService, {useClass: MyMockService})|provide|useClass syntax(js): ng.core.provide(MyService, {useClass: MyMockService})|provide|useClass description: Sets or overrides the provider for MyService to the MyMockService class.

@cheatsheetItem syntax(ts dart): provide(MyService, {useFactory: myFactory})|provide|useFactory syntax(js): ng.core.provide(MyService, {useFactory: myFactory})|provide|useFactory description: Sets or overrides the provider for MyService to the myFactory factory function.

@cheatsheetItem syntax(ts dart): provide(MyValue, {useValue: 41})|provide|useValue syntax(js): provide(MyValue, {useValue: 41})|provide|useValue description: Sets or overrides the provider for MyValue to the value 41.