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

@cheatsheetSection Dependency injection configuration @cheatsheetIndex 9 @description {@target dart}import 'package:angular2/core.dart';{@endtarget}

@cheatsheetItem syntax(ts dart): { provide: MyService, useClass: MyMockService }|provide|useClass syntax(js): { 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): { 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.