angular-docs-cn/modules/angular2/src/core/application_tokens.js

import {OpaqueToken} from 'angular2/di';

export var appComponentRefToken = new OpaqueToken('ComponentRef');
export var appChangeDetectorToken = new OpaqueToken('AppChangeDetector');
export var appElementToken = new OpaqueToken('AppElement');
export var appComponentAnnotatedTypeToken = new OpaqueToken('AppComponentAnnotatedType');
export var appDocumentToken = new OpaqueToken('AppDocument');