CODEWITHSUNDEEP
angular
karthikaruna
karthikaruna

Reputation: 3236

Angular: nativeElement is undefined on ViewChild

I want to access the DOM of a component using ViewChild. But when I try to access the nativeElement property, it's undefined.

Below is the snippet.

import { Component, ViewChild, AfterViewInit } from '@angular/core';
import { AlertComponent } from './alert.component';

@Component({
    selector: 'app-root',
    template: `
    <app-alert #alert>My alert</app-alert>
      <button (click)="showAlert()">Show Alert</button>`
})
export class AppComponent implements AfterViewInit {
  @ViewChild('alert') alert;

  showAlert() {
    console.log('alert (showalert)', this.alert.nativeElement);
    this.alert.show();
  }

  ngAfterViewInit() {
    console.log('alert (afterviewinit)', this.alert.nativeElement);
  }
}

Please take a look at the plunk.

Upvotes: 73

Views: 59546

Answers (1)

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 657058

If you want to get a reference of an element that hosts a component or directive you need to specify that you want the element instead of the component or directive

@ViewChild('alert', { read: ElementRef }) alert:ElementRef;

See also angular 2 / typescript : get hold of an element in the template

In your case I guess you need two different @ViewChild() one for the component reference to be able to access the show() method, and a 2nd one to be able to access DOM attributes.

Plunker example

Upvotes: 170

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