by Sai gowtham

How to change a Favicon dynamically using JavaScript

In this tutorial, we are going to learn about how to change a webpage favicon dynamically using JavaScript.

Getting started

Let’s start with an Html markup.

<head>
  <title>Dynamically change icons</title>
  <link rel="icon" href="https://angular.io/assets/images/favicons/favicon.ico"/></head>

<div>
  <button id="react">Change to react favicon</button>
  <button id="google">Change to google favicon</button>
</div>

In the above markup, we have added default favicon using the link tag then we added two-button elements that are used to change the favicon.

Changing favicon dynamically

To change a favicon dynamically first, we need to access the favicon element using the document.querySelector() method then set a new favicon by assigning a value to the href property.

// accessing the favicon
const favicon = document.querySelector('[rel=icon]');const react = document.getElementById('react');
const google = document.getElementById('google');

react.addEventListener('click',()=>{
        // setting new favicon
         favicon.href = "https://reactjs.org/favicon.ico";})

google.addEventListener('click',()=>{
         // setting new favicon
         favicon.href = "https://www.google.com/favicon.ico";})

Now, if we click on Change to react favicon button our favicon is changed to react favicon or if we click on Change to google favicon button our favicon is changed to google favicon.

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