JSFiddle - React, Tailwind, and code Playground

by damphat

HTML

<body>
    <div id="txt">click START then STOP to calculate delta time</div>
    <button id="start">START</button>
    <button id="stop">STOP</button>
    <div style="background-color:yellow">NOTE: if you change system clock during start-stop, Delta will be wrong</div>
</body>

JavaScript

$(document).ready(function () {
    var start_time;

    $("#start").click(function () {
        start_time = Date.now();
        $("#txt").text("Start time = " + start_time);
    })

    $("#stop").click(function () {
        var stop_time = Date.now();
        var delta_time = stop_time - start_time;

        $("#txt").text("Delta = " + delta_time + " miliseconds");
    })
})