我的獲取到的對(duì)象一直是window 代碼如下 移入就會(huì)報(bào)錯(cuò)
<!doctype html>
<html>
<head>
? ? <meta charset="UTF-8">
? ? <title>JS動(dòng)畫2</title>
? ? <style type="text/css">
?ul li {
? ? list-style: none;
? ? width: 200px;
? ?height: 100px;
? ?background: yellow;
? ?margin-bottom: 20px;
}
? ? </style>
</head>
<body>
? <ul>
<li>1</li>
<li>2</li>
<li>3</li>
? </ul>
</body>
? ?<script type="text/javascript">
? ?window.onload=function() {
? ? var lis=document.getElementsByTagName("li");
? ? for(var i=0;i<lis.length;i++){
? ? ? lis[i]=onmouseover=function(){
? ? ? ? Move(this,400);
? ? ? }
? ? ? lis[i]=onmouseover=function(){
? ? ? ? Move(this,200);
? ? ? }
? ? }
? }
? var timer=null;
? function Move(tar,aim) {
? ?clearInterval(timer);
? ?timer=setInterval(function(){
? var sp=(aim-tar.offsetWidth)/8;
? sp=sp>0?Math.ceil(sp):Math.floor(sp);
? ? if(tar.offsetWidth==aim){
? ? ? clearInterval(timer);
? ? }else{
? ? ??
? ? ? tar.offsetWidth=tar.style.width+sp+"px";
? ? }
??
? ?},10);
? }
? ?
?
? ?</script>
</html>
2017-09-22
<!doctype?html> <html> <head> ????<meta?charset="UTF-8"> ????<title>JS動(dòng)畫2</title> ????<style?type="text/css"> ?ul?li?{ ????list-style:?none; ????width:?200px; ???height:?100px; ???background:?yellow; ???margin-bottom:?20px; } ????</style> </head> <body> ??<ul> <li>1</li> <li>2</li> <li>3</li> ??</ul> </body> ???<script?type="text/javascript"> ???window.onload=function()?{ ????var?lis=document.getElementsByTagName("li"); ????for(var?i=0;i<lis.length;i++){ lis[i].timer=null;//給每一個(gè)li設(shè)一個(gè)私有的定時(shí)器 ??????lis[i].onmouseover=function(){//不是等于符號(hào)是點(diǎn). ????????Move(this,400); ??????} ??????lis[i].onmouseout=function(){//不是等于符號(hào)是點(diǎn). ????????Move(this,200); ??????} ????} ??} //var?timer=null;不能共用同一個(gè)定時(shí)去 ??function?Move(tar,aim)?{ ???clearInterval(tar.timer); ???tar.timer=setInterval(function(){ ??var?sp=(aim-tar.offsetWidth)/8; ??sp=sp>0?Math.ceil(sp):Math.floor(sp); ????if(tar.offsetWidth==aim){ ??????clearInterval(tar.timer); ????}else{ ?????? ??????tar.style.width=tar.offsetWidth+sp+"px";//這里你寫反了 ????} ?? ???},10); ??} ??? ? ???</script> </html>