script.js

const HOURHAND = document.querySelector("#hour");
const MINUTEHAND = document.querySelector("#minute");
const SECONDHAND = document.querySelector("#second");
const DIGITALCLOCK = document.querySelector('.digitalClock h1');

function leadingZero(time) {
    if (time <= 9) {
        time = "0" + time;
    }
    return time;
}

function runClock() {
    var date = new Date();
    let hr = date.getHours();
    let min = date.getMinutes();
    let sec = date.getSeconds();

    let hrPosition = (hr * 360 / 12) + (min * (360 / 60) / 12);
    let minPosition = (min * 360 / 60) + (sec * (360 / 60) / 60);
    let secPosition = sec * 360 / 60;

    HOURHAND.style.transform = "rotate(" + hrPosition + "deg)";
    MINUTEHAND.style.transform = "rotate(" + minPosition + "deg)";
    SECONDHAND.style.transform = "rotate(" + secPosition + "deg)";
    DIGITALCLOCK.textContent = leadingZero(hr) + ":" + leadingZero(min) + ":" + leadingZero(sec);
}

var interval = setInterval(runClock, 1000);