JSFiddle - React, Tailwind, and code Playground

by jfriend00

HTML

<span id="timeSinceStart"></span>

JavaScript

var timeRefreshed = new Date();
    function displayTimeSinceStart(){
        var now = new Date();
        //compute elapsed time
        var elapsed = Math.round((now - timeRefreshed)/1000);
        document.getElementById("timeSinceStart").innerHTML = "Time Elapsed: " + elapsed + " seconds."; 
    }

    // Update seconds counter
    setInterval(displayTimeSinceStart, 1000);