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
}
}
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