当悬停/取消悬停按钮时,底部边框在IE9中再次向下和向下移动：
<!DOCTYPE html>
<html>
<head>
<style>
.btn:hover {
Box-shadow: 0 0 0 2px #b1b3b4;
}
</style>
<head>
<body>
<div style="overflow: auto; border: 1px solid black;">
<div style="width: 110%; height: 20px;">
Wide content causing horizontal scrolling....
</div>
<button class="btn">Hover Me</button>
</div>
</body>
</html>
解决方法
试试这个：
选项1(稍微改变html)：
<div style="overflow: auto; border: 1px solid black;">
<div style="width: 110%; height: 20px;">Wide content causing horizontal scrolling...</div>
<span><button class="btn">Hover Me</button></span>
</div>
http://jsfiddle.net/WW3bh/10615/
选项2(使用提供的html,使用js)：
$('.btn').hover(function () {
var $btn = $(this);
var originalPosition = $btn.css('position');
$btn.css('position','fixed');
// this.offsetHeight is needed to trigger browser reflow.
this.offsetHeight;
$btn.css('position',originalPosition);
});
