A constructor parameter decorator that tells the DI framework to retrieve a dependency only from the local injector.
说明
In the following example, the dependency can be resolved by the local injector when instantiating the class itself, but not when instantiating a child.
class Dependency {} @Injectable() class NeedsDependency { constructor(@Self() public dependency: Dependency) {} } let inj = ReflectiveInjector.resolveAndCreate([Dependency, NeedsDependency]); const nd = inj.get(NeedsDependency); expect(nd.dependency instanceof Dependency).toBe(true); inj = ReflectiveInjector.resolveAndCreate([Dependency]); const child = inj.resolveAndCreateChild([NeedsDependency]); expect(() => child.get(NeedsDependency)).toThrowError();
