angular2 获取 DOM

html

<div #app1></div>

js

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

export class HomeComponent {

        @ViewChild('app1') app1:ElementRef;

        constructor( private element: ElementRef, private renderer2: Renderer2 ) {}

        ngOnInit() {

                const   a = this.app1.nativeElement;//获取dom元素

                const   b = this.renderer2.parentNode(a)；//获取元素父级元素

        }

}