angular2简单addClass (jquery风格)？

import { Renderer2 } from '@angular/core';

constructor(private renderer: Renderer2) { }

this.renderer.addClass(element, 'class-name');

import { Component, Renderer2, ElementRef } from '@angular/core';

@Component({
  selector: 'app-example',
  template: '<div #myElement>Example</div>',
})
export class ExampleComponent {
  constructor(private renderer: Renderer2, private el: ElementRef) { }

  ngAfterViewInit() {
    const element = this.el.nativeElement.querySelector('#myElement');
    this.renderer.addClass(element, 'highlight');
  }
}