angular2
Version:
Angular 2 - a web framework for modern web apps
52 lines • 6.14 kB
JavaScript
import { OpaqueToken, Provider } from 'angular2/src/core/di';
import { CONST_EXPR, Math, StringWrapper } from 'angular2/src/facade/lang';
/**
* @internal
*/
export const APP_COMPONENT_REF_PROMISE = CONST_EXPR(new OpaqueToken('Promise<ComponentRef>'));
/**
* An {@link angular2/di/OpaqueToken} representing the application root type in the {@link
* Injector}.
*
* ```
* @Component(...)
* class MyApp {
* ...
* }
*
* bootstrap(MyApp).then((appRef:ApplicationRef) {
* expect(appRef.injector.get(appComponentTypeToken)).toEqual(MyApp);
* });
*
* ```
*/
export const APP_COMPONENT = CONST_EXPR(new OpaqueToken('AppComponent'));
/**
* A DI Token representing a unique string id assigned to the application by Angular and used
* primarily for prefixing application attributes and CSS styles when
* {@link ViewEncapsulation#Emulated} is being used.
*
* If you need to avoid randomly generated value to be used as an application id, you can provide
* a custom value via a DI provider <!-- TODO: provider --> configuring the root {@link Injector}
* using this token.
*/
export const APP_ID = CONST_EXPR(new OpaqueToken('AppId'));
function _appIdRandomProviderFactory() {
return `${_randomChar()}${_randomChar()}${_randomChar()}`;
}
/**
* Providers that will generate a random APP_ID_TOKEN.
*/
export const APP_ID_RANDOM_PROVIDER = CONST_EXPR(new Provider(APP_ID, { useFactory: _appIdRandomProviderFactory, deps: [] }));
function _randomChar() {
return StringWrapper.fromCharCode(97 + Math.floor(Math.random() * 25));
}
/**
* A function that will be executed when a platform is initialized.
*/
export const PLATFORM_INITIALIZER = CONST_EXPR(new OpaqueToken("Platform Initializer"));
/**
* A function that will be executed when an application is initialized.
*/
export const APP_INITIALIZER = CONST_EXPR(new OpaqueToken("Application Initializer"));
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