标签：weight var info splay code UNC width gray name
代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>倒计时</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
body {
width: 100%;
height: 100%;
}
#box {
position: absolute;
top: 50%;
left: 50%;
width: 600px;
height: 100px;
margin-top: -50px;
margin-left: -300px;
text-align: center;
line-height: 100px;
font-size: 26px;
font-weight: 700;
font-family: "黑体";
color: gray;
}
#box .seconds {
display: inline-block;
width: 50px;
height: 50px;
font-size: 48px;
text-align: center;
line-height: 50px;
animation: animate 1s infinite;
}
@keyframes animate {
from {
font-size: 48px;
}
to {
font-size: 24px;
}
}
</style>
<script type="text/javascript">
window.onload = function() {
var box = document.getElementById("box");
var seconds = document.getElementsByClassName("seconds")[0];
seconds.innerText = "5";
var timer = setInterval(function() {
seconds.innerText = parseInt(seconds.innerText) - 1;
if (parseInt(seconds.innerText) < 0) {
clearInterval(timer);
box.innerHTML = "全军出击";
}
}, 1000);
}
</script>
</head>
<body>
<div id="box">
敌军还有<i class="seconds"></i>秒到达战场...
</div>
</body>
</html>
效果
标签：weight var info splay code UNC width gray name
原文地址：https://www.cnblogs.com/lightbc/p/12934262.html
