JSFiddle - React, Tailwind, and code Playground

HTML

<div id="timer"></div>

JavaScript

var expires = new Date();

expires.setSeconds(expires.getSeconds() + 60); // set timer to 60 seconds
var counter = setInterval(timer, 1);

function timer() {
    var timeDiff = expires - new Date();
    
    if (timeDiff <= 0) {
        clearInterval(counter);
        document.getElementById("timer").innerHTML = "00:00";
        return;
    }
    
    var seconds = new Date(timeDiff).getSeconds();    
    var milliSeconds = (new Date(timeDiff).getMilliseconds()/10).toFixed(0);
    
    var seconds = seconds < 10 ? "0" + seconds: seconds;
    var milliSeconds = milliSeconds < 10 ? "0" + milliSeconds: milliSeconds;
    
    document.getElementById("timer").innerHTML = seconds + ":" + milliSeconds; // watch for spelling
}