Html “位置:绝对”div 有没有办法保持相对宽度?
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/14327104/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Is there any way for "position:absolute" div to retain relative width?
提问by Charles
Let's say I have two divs, one inside the other, like so:
假设我有两个 div,一个在另一个里面,如下所示:
<html>
<body>
<div id="outer" style="width:50%">
<div id="inner" style="width:100%">
</div>
</div>
</body>
</html>
Right now, the inner div has a width of 100% of 50% of the screen size, or 50% of the screen size. If I were to change the inner div to position absolute, like this:
现在,内部 div 的宽度为屏幕尺寸的 50% 的 100%,或屏幕尺寸的 50%。如果我要将内部 div 更改为绝对位置,如下所示:
<html>
<body>
<div id="outer" style="width:50%">
<div id="inner" style="position:absolute;width:100%">
</div>
</div>
</body>
</html>
In this case the inner div takes up 100% of the screen space, because its position is set to absolute.
在这种情况下,内部 div 占据了 100% 的屏幕空间,因为它的位置被设置为绝对。
My question is this: Is there any way to maintain relative width of the inner div while its position is set to absolute?
我的问题是:有什么办法可以在内部 div 的位置设置为绝对时保持其相对宽度?
回答by Bror
Add position:relativeto your outer div.
添加位置:相对于您的外部 div。
update: It works because positions in position: absolute
are relative to the first parent that has some positioning (other than static). In this case there was no such container, so it uses the page.
update:它起作用是因为位置position: absolute
是相对于具有某种定位(静态除外)的第一个父级的。在这种情况下没有这样的容器,所以它使用页面。
回答by Eli Gassert
Yes. Set outer to position: relative.
是的。将外部设置为位置:相对。
.outer
{
width: 50%;
height: 200px;
position: relative;
border: 1px solid red;
}
.inner
{
width: 100%;
position: absolute;
height: 100%;
border: 1px solid blue;
}