What is the method to add a browser tab icon using JavaScript?

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To add a browser tab icon using JavaScript, you can use the following code:

var icon = document.createElement('link');
icon.setAttribute('rel', 'shortcut icon');
icon.setAttribute('type', 'image/png');
icon.setAttribute('href', 'path/to/icon.png');
document.head.appendChild(icon);

In this code snippet, you create a new link element with the shortcut icon relation and set the type to image/png. Then, you set the href attribute to the path of the icon file. Finally, you append the new element to the head of the document.