const
Injects a token from the currently active injector.
const inject: { <T>(token: Type<T> | AbstractType<T> | InjectionToken<T>): T; <T>(token: Type<T> | AbstractType<T> | InjectionToken<T>, flags?: InjectFlags): T; };
Must be used in the context of a factory function such as one defined for an InjectionToken
. Throws an error if not called from such a context.
Within such a factory function, using this function to request injection of a dependency is faster and more type-safe than providing an additional array of dependencies (as has been common with useFactory
providers).
Further information available in the Usage Notes...
class MyService { constructor(readonly myDep: MyDep) {} } const MY_SERVICE_TOKEN = new InjectionToken<MyService>('Manually constructed MyService', { providedIn: 'root', factory: () => new MyService(inject(MyDep)), }); const instance = injector.get(MY_SERVICE_TOKEN); expect(instance instanceof MyService).toBeTruthy(); expect(instance.myDep instanceof MyDep).toBeTruthy();
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Licensed under the Creative Commons Attribution License 4.0.
https://v11.angular.io/api/core/inject-0