The ChangeDetectorRef.detectChanges() method is used to manually trigger change detection in an Angular component. It can be useful in certain situations, such as when you need to update the view after making changes to a component's state. However, calling this method too frequently can lead to performance issues, as it triggers a full change detection cycle for the component and all of its children.

Instead of relying on ChangeDetectorRef.detectChanges() to update the view, it is recommended to use Angular's built-in change detection mechanism whenever possible. This mechanism automatically detects changes to a component's state and updates the view accordingly. By using this mechanism, you can avoid unnecessary change detection cycles and improve the performance of your application.

Here is an example of how to use Angular's built-in change detection mechanism:

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

@Component({
  selector: 'app-example',
  template: `
    <div>
      {{message}}
      <button (click)="updateMessage()">Update message</button>
    </div>
  `
})
export class ExampleComponent {
  message = 'Hello, world!';

  updateMessage() {
    this.message = 'Goodbye, world!';
  }
}

In the above example, the message property is updated when the user clicks the "Update message" button. Angular's built-in change detection mechanism automatically detects this change and updates the view accordingly, without the need for ChangeDetectorRef.detectChanges().