JSFiddle - React, Tailwind, and code Playground

by Chandan Sharma

HTML

<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<input type="text" id="url">
<br/>
<input type="button" value="Get Top Domain" id="getTopDomain"/>

JavaScript

jQuery('#getTopDomain').click(function() {
    var regex = new RegExp(/\./g)
    var text = jQuery('#url').val();
    var count = text.match(regex).length;
      
    if(count > 1) {
        text = text.substring(text.indexOf('.')+1);
    }
    alert(text);
});