how to set timer for 1 hour?

Today, We want to share with you timer 1 hour.In this post we will show you The simplest possible JavaScript countdown timers?, hear for 1 hour timers with music we will give you demo and example for implement.In this post, we will learn about Javascript Timed Redirect With Countdown with an example.

Online 1 hour 30 minute timer – Stopwatch & Timers

here i learn to 1 hour timers – online timers with countdown using JavaScript with HTML Code. Set alarm for 1 hour ⏰ as well as wake up in time. Free and simply to use countdown timers.

HTML Code

JavaScript Code

function countdown( elementName, minutes, seconds )
{
    var element, endTime, hours, mins, msLeft, time;

    function twoDigits( n )
    {
        return (n <= 9 ? "0" + n : n);
    }

    function updateTimer()
    {
        msLeft = endTime - (+new Date);
        if ( msLeft < 1000 ) {
            element.innerHTML = "countdown's over!";
        } else {
            time = new Date( msLeft );
            hours = time.getUTCHours();
            mins = time.getUTCMinutes();
            element.innerHTML = (hours ? hours + ':' + twoDigits( mins ) : mins) + ':' + twoDigits( time.getUTCSeconds() );
            setTimeout( updateTimer, time.getUTCMilliseconds() + 500 );
        }
    }

    element = document.getElementById( elementName );
    endTime = (+new Date) + 1000 * (60*minutes + seconds) + 500;
    updateTimer();
}

countdown( "countdown", 1, 5 );
countdown( "countdown2", 100, 0 );

style.css

div {
    color: #1B232F;
    font-family: Verdana, Arial, sans-serif;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
}