JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<input id='txtName' type='text' />
<input id='button1' type='button' />

JavaScript

$(document).ready(function(){

$('#txtName').on("focusout",function(event) {
alert('focus gone');

});

$('#button1').on('click',function(){
   alert('button click');
 });
});