js层展开/关闭 - 运动缓冲效果

2021-07-16 13:09:03

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" lang="zh-CN">
<head>
<title>层展开/关闭 - 运动缓冲效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script type="text/javascript">
function Scroll(obj, h, s){
var hh = h || 200;
var ss = s || 1.2;
var obj = typeof(obj)=="string"?document.getElementById(obj):obj;
if(obj == undefined){return false;}
var status = obj.getAttribute("status")==null;
var oh = parseInt(obj.offsetHeight);
obj.style.height = oh;
obj.style.display = "block";
obj.style.overflow = "hidden";
if(obj.getAttribute("oldHeight") == null){
obj.setAttribute("oldHeight", oh);
}else{
var oldH = Math.ceil(obj.getAttribute("oldHeight"));
}
var reSet = function(){
if(status){
if(oh < h){
oh = Math.ceil(h-(h-oh)/s);
obj.style.height = oh+"px";
}else{
obj.setAttribute("status",false);
window.clearInterval(IntervalId);
}
}else{
obj.style.height = oldH+"px";
obj.removeAttribute("status");
window.clearInterval(IntervalId);
}
}
var IntervalId = window.setInterval(reSet,10);
return status;
}
window.onload= function(){
var $ = function(id){return document.getElementById(id)};
$('menu').onclick = function(){
Scroll('menu',this.scrollHeight,1.2);
}
$('test').onclick = function(){
Scroll('test',300,1.2);
}
}
</script>
</head>
<body>
<div id="test" style="border:1px solid #f00;width:200px">单击后展开指定高度 300px</div>
<div id="menu" style="position:absolute;top:10px;left: 400px;border:1px solid #ccc;width:160px;height:16px;text-align:center;cursor:pointer;overflow:hidden;">
单击后根据展开的高度根据内容而变
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</div>
</body>
</html>

本文转自许琴 51CTO博客，原文链接：http://blog.51cto.com/xuqin/925215，如需转载请自行联系原作者

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