JSFiddle - React, Tailwind, and code Playground

by Palpatim

HTML

<input id="textbox" />
<button>Validate</button>
<div id="results"></div>

JavaScript

$(function(){
    var r = /^\d{3}(?:,\d{3})*$/
    $('button').click(function() {
        var s = $('#textbox').val();
        var match = false;
        if (r.test(s)) {
            match = true;
        }
        $('#results').append("Match result=" + match + "<br/>");
    });
});