js实现部分
<script>
// 获取元素
var hour = document.querySelector('.hour');
var minute = document.querySelector('.minute');
var second = document.querySelector('.second');
// 获取用户输入的时间
var inputTime = +new Date('2023-08-08 12:00:00');
// 开启定时器
setInterval(countDown)
function countDown() {
// 获取当前的时间戳
var newTime = +new Date();
// console.log(newTime);
// 获取剩余总的秒数
var times = (inputTime - newTime) / 1000;
// 获取小时数
var h = parseInt(times / 60 / 60 % 24);
h = h < 10 ? '0' + h : h;
hour.innerHTML = h;
var m = parseInt(times / 60 % 60);
m = m < 10 ? '0' + m : m;
minute.innerHTML = m;
var s = parseInt(times % 60);
s = s < 10 ? '0' + s : s;
second.innerHTML = s;
}
</script>
全部代码实现部分
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
div {
margin: 200px;
}
span {
display: inline-block;
width: 40px;
height: 40px;
background-color: #333;
font-size: 20px;
color: #fff;
text-align: center;
line-height: 40px;
}
</style>
</head>
<body>
<div>
<span class="hour">1</span>
<span class="minute">2</span>
<span class="second">3</span>
</div>
<script>
// 获取元素
var hour = document.querySelector('.hour');
var minute = document.querySelector('.minute');
var second = document.querySelector('.second');
// 获取用户输入的时间
var inputTime = +new Date('2023-08-08 12:00:00');
// 开启定时器
setInterval(countDown)
function countDown() {
// 获取当前的时间戳
var newTime = +new Date();
// console.log(newTime);
// 获取剩余总的秒数
var times = (inputTime - newTime) / 1000;
// 获取小时数
var h = parseInt(times / 60 / 60 % 24);
h = h < 10 ? '0' + h : h;
hour.innerHTML = h;
var m = parseInt(times / 60 % 60);
m = m < 10 ? '0' + m : m;
minute.innerHTML = m;
var s = parseInt(times % 60);
s = s < 10 ? '0' + s : s;
second.innerHTML = s;
}
</script>
</body>
</html>