Method constructor

modules/playground/src/hello_world/main.ts:27–29

(el: ElementRef, renderer: Renderer2)

  // ElementRef is always injectable and it wraps the element on which the
  // directive was found by the compiler.
  constructor(el: ElementRef, renderer: Renderer2) {
    renderer.setStyle(el.nativeElement, 'color', 'red');
  }
}

// Angular supports 2 basic types of directives: