//百度之后知道offsetWidth包含了边框厚度，请问怎么解决有边框的时候恢复初始位置？
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>多物体运动</title>
<style>
* {
margin: 0;
padding: 0;
}
ul {
display: block;
}
li {
width: 200px;
height: 100px;
background-color: #ccc;
margin-top: 20px;
border: 1px solid;
}
</style>
<script>
window.onload = function () {
var list = document.getElementsByTagName("li");
for (var i = 0; i < list.length; i++) {
list[i].timer = null;
list[i].onmouseover = function () {
oMove(this, 400);
}
list[i].onmouseout = function () {
oMove(this, 200);
}
}
function oMove(obj, iTag) {
clearInterval(obj.timer);
obj.timer = setInterval(function () {
var speed = (iTag - obj.offsetWidth) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if (obj.offsetWidth == iTag) {
console.log(obj.offsetWidth);
clearInterval(obj.timer);
} else {
obj.style.width = obj.offsetWidth + speed + 'px';
}
}, 30);
}
}
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
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