create timer javascript code example
Example 1: timer in javascript
//single event i.e. alarm, time in milliseconds
var timeout = setTimeout(function(){yourFunction()},10000);
//repeated events, gap in milliseconds
var interval = setInterval(function(){yourFunction()},1000);
Example 2: countdown in js
function startTimer(duration, display) {
var timer = duration, minutes, seconds;
setInterval(function () {
minutes = parseInt(timer / 60, 10);
seconds = parseInt(timer % 60, 10);
minutes = minutes < 10 ? "0" + minutes : minutes;
seconds = seconds < 10 ? "0" + seconds : seconds;
display.textContent = minutes + ":" + seconds;
if (--timer < 0) {
timer = duration;
}
}, 1000);
}
window.onload = function () {
var fiveMinutes = 60 * 5,
display = document.querySelector('#time');
startTimer(fiveMinutes, display);
};
Example 3: How to make a timer in javascript
// this example takes 2 seconds to run
const start = Date.now();
// After a certain amount of time, run this to see how much time passed.
const milliseconds = Date.now() - start;
console.log('Seconds passed = ' + millis / 1000);
// Seconds passed = *Time passed*
Example 4: javascript countdown timer including days
var countDownDate = new Date("Jul 25, 2021 16:37:52").getTime();
var myfunc = setInterval(function() {
var now = new Date().getTime();
var timeleft = countDownDate - now;
var days = Math.floor(timeleft / (1000 * 60 * 60 * 24));
var hours = Math.floor((timeleft % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((timeleft % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((timeleft % (1000 * 60)) / 1000);
}, 1000)
Example 5: onclick timer javascript
document.getElementById("gameStart").addEventListener("click", function(){
var timeleft = 15;
var downloadTimer = setInterval(function function1(){
document.getElementById("countdown").innerHTML = timeleft +
" "+"seconds remaining";
timeleft -= 1;
if(timeleft <= 0){
clearInterval(downloadTimer);
document.getElementById("countdown").innerHTML = "Time is up!"
}
}, 1000);
console.log(countdown);
});
Example 6: countdown in js
<body>
<div>Registration closes in <span id="time">05:00</span> minutes!</div>
</body>