JSFiddle - React, Tailwind, and code Playground

HTML

<input id="tid" type="button" value="click me" />

JavaScript

$(document).ready(function() {
    var tid1 =  (new Date).getTime();

    $("#tid").click(function() {
        var nu = (new Date).getTime();
        var diffMillis = nu - tid1;
        var seconds = Math.floor(diffMillis / 1000);
        var secondsPart = seconds % 60;
        var minutes = Math.floor(seconds / 60);
        var minutesPart = minutes % 60;
        var hoursPart = Math.floor(minutes / 60);
        console.log(hoursPart + ":" + minutesPart + ":" + secondsPart);  
    });
})