JS日期倒计时代码
以下是JS日期倒计时代码示例：
<!DOCTYPE html>
<html>
<head>
<title>JS Countdown Timer</title>
</head>
<body>
<h1 id="countdown"></h1>
<script>
// Set the date we're counting down to
var countDownDate = new Date("Jan 1, 2022 00:00:00").getTime();
// Update the countdown every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the countdown date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the countdown
document.getElementById("countdown").innerHTML = days + "d " + hours + "h " + minutes + "m " + seconds + "s ";
// If the countdown is finished, display a message
if (distance < 0) {
clearInterval(x);
document.getElementById("countdown").innerHTML = "EXPIRED";
}
}, 1000);
</script>
</body>
</html>
以上代码将在页面上显示一个倒计时，直到指定日期。该代码使用setInterval()方法每隔1秒更新一次倒计时，并使用JavaScript进行日期和时间计算。innerHTML属性用于将计算结果显示在页面上。
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