跟几个例子吧
计时器的例子：
/**
* Created by Administrator on 2016/8/5.
*/
(function () {
function show() {
var time = new Date();
document.body.innerHTML="当前时间为"+format(time.getHours())
+":"+format(time.getMinutes())+":"+format(time.getSeconds());
}
function format(num) {
if(num>=10){
return num;
}else {
return "0"+num;
}
}
setInterval(function () {
show();
},1000);
show();
})();
进度条的例子：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.con{
width: 100%;
height: 20px;
background-color: cadetblue;
}
.bar{
height: 20px;
background-color: coral;
position: absolute;
}
.hu{
width: 100%;
text-align: center;
line-height: 20px;
position: absolute;
}
</style>
</head>
<body>
<div class="con">
<div class="bar"></div>
<div class="hu">0%</div>
</div>
<script src="main01.js"></script>
</body>
</html>
html
/**
* Created by Administrator on 2016/8/5.
*/
(function () {
var width=1;
var div=document.querySelector(".bar");
var divhu=document.querySelector(".hu");
function syBar() {
var va=width+"%";
divhu.innerHTML=va;
div.style.width=va;
}
var time=setInterval(function () {
width++;
syBar();
if(width>=100){
clearInterval(time);
}
},100);
syBar();
})();
javascript
关于进度条说一点，注意加上单位（%或px），如
var va=width+"%";divhu.innerHTML=va;div.style.width=va;这三行。
时间： 2024-08-26 12:45:26