The ContentAfterCheck Hook in Angular

The Angular framework offers various lifecycle methods during the process of loading and rendering components. One of these is the ContentAfterCheck lifecycle hook.

The ContentAfterCheck lifecycle hook is called after the content of a component has been loaded and its first render process has completed. Additionally, it can be called again during the process of updating the component’s content.

This lifecycle hook is perfect for executing logic that should take place once the content of the component has been loaded and rendered. Examples of such logic include measuring the size of a DOM element within the component or updating the UI based on the component’s content.

The ContentAfterCheck lifecycle hook can be defined in the ComponentMetadata class of a component. You can implement it by overriding the ngAfterContentChecked() method:

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

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.css']
})
export class TestComponent implements AfterContentChecked {
  ngAfterContentChecked(): void {
    // logic to be executed when the component's content is updated
  }
}