使父div的div中间 [英] make a div middle of parent div
本文介绍了使父div的div中间的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我试图在#chat-main
div中保留#chat-inner
div,以及我可以通过使用百分比值来做到这一点,但我的问题是,应该有一个百分比值不能提供的 2px
间隙(相对于宽度和高度)。为清楚理解,请参阅CSS代码中的注释。
JSbin
$ b HTML
< div id =chat-outline>
< div id =chat-main>
< div id =chat-inner>
< / div>
< / div>
< / div>
CSS
#chat-outline
{background-color:gray; width:30%; height:40%;
position:fixed; bottom:5px; right:5px;
padding:2px;}
#chat-main
{
width:100%;
身高:100%;
background-color:silver;
overflow:hidden;
}
#chat-inner
{
width:95%;
身高:97%;
/ *我怎样才能在这里给像素?我需要2px值* /
保证金:2.5%2.5%2.5%2.5%;
/ * margin:2px; * /
background-color:cornflowerblue;
解决方案
a href =http://jsbin.com/ofipey/10/edit =nofollow> demo ):
#chat-outline
{background-color:gray; width:30%; height:40%;
position:fixed; bottom:5px; right:5px;
padding:2px;}
#chat-main
{
width:100%;
身高:100%;
background-color:silver;
overflow:hidden;
职位:亲属;
}
#chat-inner
{
top:2px;
bottom:2px;
right:2px;
left:2px;
background-color:cornflowerblue;
位置:绝对;
}
I am trying to keep #chat-inner
div in the middle of the #chat-main
div, well I can do that by using percentage values but my problem is that there should be 2px
gap (with respect to both width and height) which a percentage value cant provide. For clear understanding please see the comment in CSS code.
HTML
<div id="chat-outline">
<div id="chat-main">
<div id="chat-inner">
</div>
</div>
</div>
CSS
#chat-outline
{background-color:grey;width:30%;height:40%;
position:fixed;bottom:5px;right:5px;
padding:2px;}
#chat-main
{
width:100%;
height:100%;
background-color:silver;
overflow:hidden;
}
#chat-inner
{
width:95%;
height:97%;
/*How can I give pixels here? I need 2px value*/
margin:2.5% 2.5% 2.5% 2.5%;
/*margin:2px;*/
background-color:cornflowerblue;
}
解决方案
Try something like this (demo):
#chat-outline
{ background-color:grey;width:30%;height:40%;
position:fixed;bottom:5px;right:5px;
padding:2px;}
#chat-main
{
width:100%;
height:100%;
background-color:silver;
overflow:hidden;
position:relative;
}
#chat-inner
{
top:2px;
bottom:2px;
right:2px;
left:2px;
background-color:cornflowerblue;
position:absolute;
}
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