Sign in
Skip to solution
mediumFrontend

What is the difference between @ViewChildren and @ViewChild?

1.2k views
01

Understand the problem

Compare query decorators for single vs multiple templates.

componentsqueries
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

@ViewChild queries the first matching element/component/directive and returns a single reference. @ViewChildren queries all matches in the component template and returns a dynamic QueryList that updates automatically as the DOM updates.

Solution ready — 2 min read

Classified // press E to declassify

04

Read the code

Querying multiple template items using @ViewChildren
import { Component, ViewChildren, QueryList, AfterViewInit, ElementRef } from '@angular/core';

@Component({
  selector: 'app-list',
  standalone: true,
  template: '<div #item>Item A</div><div #item>Item B</div><div #item>Item C</div>'
})
export class ListComponent implements AfterViewInit {
  @ViewChildren('item') items!: QueryList<ElementRef>;

  ngAfterViewInit() {
    console.log('Total items matched:', this.items.length);

    this.items.changes.subscribe(changes => {
      console.log('List changed! New count:', changes.length);
    });
  }
}
05

Join the discussion

Discussion (0)

Sign in to join the discussion.

No responses yet. Be the first to share what you think.

Transmission complete // awaiting log

KEEP THE
STREAK ALIVE.

Dossier 14 of 121 decoded in the Angular track. One more won't hurt.

Back to track