@angular-ru/cdk/ivy

• useInjector - Access to DI inside decorators by class constructor

import {Component, Injector} from '@angular/core';
import {useInjector} from '@angular-ru/cdk/ivy';

import {UserService} from './test.service.ts';

function Username(): PropertyDecorator {
  return <T extends typeof Object.prototype>(prototypeRef: T, propertyKey: string | symbol): void => {
    useInjector(prototypeRef.constructor, (injector: Injector, instance: any): void => {
      const userService: UserService = injector.get(UserService);
      instance[propertyKey] = userService.username;
    });
  };
}

@Component({
  selector: 'test-component',
  template: '',
})
class TestComponent {
  @Username()
  public username!: string; // username will appear here after the constructor has completed
}