将绝对定位的元素从其相对定位的祖先中分离出来? [英] Break an absolutely positioned element out of its relatively positioned ancestor?
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问题描述
假设我有一个文档
<style type="text/css">
div {
border:1px solid;
padding:15px;
}
#i_am_relatively_positioned{
background-color:#fcc;
margin:50px;
padding:50px;
position:relative;
}
#inner {
background-color:#cfc;
}
#i_want_to_be_absolute_to_body{
background-color:#ccf;
left:0;
position:absolute;
top:0;
}
</style>
<body>
<div id="i_am_relatively_positioned">
<div id="inner">inner</div>
<div id="i_want_to_be_absolute_to_body">absolute to body</div>
</div>
</body>
是否有办法使#i_want_to_be_absolute_to_body相对于body元素(而不是其直接相对容器)绝对定位?
Is there a way to make #i_want_to_be_absolute_to_body positioned absolute with respect to the body element, rather than its immediate relative container?
我知道我只能用一些负数上下，但这似乎很笨拙-这是我唯一的选择吗?
I know I can just use some negative top and left but that seems kludgey - is this my only option?
推荐答案
您可以使用一些javascript来做到这一点(我假设您无法更改标记?).
You can use a bit of javascript to do this (I'm assuming you can't change the markup?).
document.body.appendChild(document.getElementById('i_want_to_be_absolute_to_body'));
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