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时钟案例.html
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时钟案例.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
#wrap {
width: 400px;
margin: 200px auto;
/*border: 1px solid red;*/
user-select: none;
}
#wrap ul {
display: flex;
}
#wrap li {
margin: 0 3px;
}
#wrap .time {
/*background-color: pink;*/
transition: top 0.3s;
}
#wrap li:not(.dot) {
width: 100%;
height: 62px;
background: linear-gradient(to bottom, #434343 50%, #393939 50%);
border-radius: 10px;
line-height: 62px;
text-align: center;
color: #fff;
font-size: 26px;
}
#wrap .dot {
width: 20px;
height: 62px;
line-height: 62px;
text-align: center;
font-size: 26px;
font-weight: bolder;
}
</style>
</head>
<body>
<div id="wrap">
<ul>
<li class="hours">0</li>
<li class="hours">0</li>
<li class="dot">:</li>
<li class="minutes">0</li>
<li class="minutes">0</li>
<li class="dot">:</li>
<li class="seconds">0</li>
<li class="seconds">0</li>
</ul>
</div>
<script>
let aLi = document.querySelectorAll(" #wrap li:not(.dot)")
//先执行一次，防止页面刷新的瞬间出现全0的情况
fn()
setInterval(fn, 1000)
function fn() {
let date = new Date()
//获取new出的时间的小时，分钟，秒
let h = date.getHours()
let m = date.getMinutes()
let s = date.getSeconds()
//将小时，分钟，秒全部用函数变为两位
h = toTwo(h)
m = toTwo(m)
s = toTwo(s)
//拼接字符串，str就是要显示的结果
let str = h + m + s
//循环遍历 渲染页面
for (let i = 0; i < aLi.length; i++) {
aLi[i].innerHTML = str[i]
}
}
//将传入的值变为两位数
function toTwo(num) {
return (num < 10 ? "0" : "") + num
}
</script>
</body>
</html>