JSFiddle - React, Tailwind, and code Playground

by Luke Marlow

HTML

<input type="text" name="num" class='num' value="" />
<button class="btn">Test</button>
<br />
<div class="output"></div>

JavaScript

$('.btn').click(function(e) {
    e.preventDefault();
    var num = $('.num').val(),
        out = '';
    
    if (parseInt(num) == num) {
        out = parseInt(num);
    } else {
        out = 'Output is not a number';
    }
    
    $('.output').text(out);
});