How to change the favicon dynamically in Angular

In this tutorial, we are going to learn about how to dynamically change the favicon in a angular app.

Changing favicon dynamically

1. Open the angular project in your favorite code editor.

2. Navigate to the src folder and open the index.html file, add the id attribute to the following link tag.

<link rel="icon" id="appIcon" type="image/x-icon" href="favicon.ico">

Now, we can access this favicon link tag inside our app.component.ts file using the document.querySelector() method by passing id #appIcon as an argument, then we need to update its href property with a new favicon like this.

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

export class AppComponent {
                             // accessing favicon link tag
  favIcon: HTMLLinkElement = document.querySelector('#appIcon');
  changeIcon() {
    this.favIcon.href = 'https://www.google.com/favicon.ico';  }
}

In your app.component.html file add a <button> element with (click)="changeIcon()" event handler.

<div>
  <button (click)="changeIcon()">Change icon</button></div>

Now, if we click on the Change icon button our favicon is changed to Google's favicon.