用JS生成一个倒计时
时间: 2023-03-01 09:46:16 浏览: 79
可以使用JavaScript实现倒计时功能。代码如下:
```
<p id="timer"></p>
<script>
// Set the date we're counting down to
var countDownDate = new Date("Sep 5, 2021 15:37:25").getTime();
// Update the count down 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 count down 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 result in the element with id="timer"
document.getElementById("timer").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is finished, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("timer").innerHTML = "EXPIRED";
}
}, 1000);
</script>
```
上面的代码使用了setInterval()函数,该函数每隔一秒钟就会调用一次函数来更新倒计时。