Countdown timer in pure JavaScript
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function countdown(endDate) { | |
let days, hours, minutes, seconds; | |
endDate = new Date(endDate).getTime(); | |
if (isNaN(endDate)) { | |
return; | |
} | |
setInterval(calculate, 1000); | |
function calculate() { | |
let startDate = new Date().getTime(); | |
let timeRemaining = parseInt((endDate - startDate) / 1000); | |
if (timeRemaining >= 0) { | |
days = parseInt(timeRemaining / 86400); | |
timeRemaining = (timeRemaining % 86400); | |
hours = parseInt(timeRemaining / 3600); | |
timeRemaining = (timeRemaining % 3600); | |
minutes = parseInt(timeRemaining / 60); | |
timeRemaining = (timeRemaining % 60); | |
seconds = parseInt(timeRemaining); | |
document.getElementById("days").innerHTML = parseInt(days, 10); | |
document.getElementById("hours").innerHTML = hours < 10 ? "0" + hours : hours; | |
document.getElementById("minutes").innerHTML = minutes < 10 ? "0" + minutes : minutes; | |
document.getElementById("seconds").innerHTML = seconds < 10 ? "0" + seconds : seconds; | |
} else { | |
return; | |
} | |
} | |
} | |
(function () { | |
countdown('04/01/2333 05:00:00 PM'); | |
}()); |
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Thank you so much for this!!! Everything else is too overly complicated :)