这里面的变量flag怎么会变回true?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{margin:0;padding:0}
div{width:200px;height:200px;background:#9F0;}
</style>
</head>
<body>
<div id="div1"></div>
<script type="text/javascript">
window.onload=function(){
var div1=document.getElementById('div1');
div1.onmouseover=function(){
startMove(div1,{'width':300,'opacity':30});
}
div1.onmouseout=function(){
startMove(div1,{'width':200,'opacity':100});
}
}
function startMove(obj,Json,fn){
var flag=true;
clearInterval(obj.timer);
obj.timer=setInterval(function(){
for(var attr in Json){
now=0;
if(attr=='opacity'){
now=parseFloat(getStyle(obj,attr))*100;
}
else{
now=parseInt(getStyle(obj,attr));
}
speed=(Json[attr]-now)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(Json[attr]!=now){
flag=false;
}
if(attr=='opacity'){
obj.style.opacity=(now+speed)/100;
obj.style.filter='alpha(opacity:'+(now+speed)+')';
}
else{
obj.style[attr]=now+speed+'px';
}
if(flag){
clearInterval(obj.timer);
if(fn){
fn();
}
}
}},10)
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
</body>
</html>
慕丝13607661回答
-
ThinkAllNight
if(Json[attr]!=now){ flag=false; }因为你声明flag时赋值true，后面只有在上述判断条件成立时才会将其改变为false
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相关分类
JavaScript