如何将div定位在另一个div中? [英] How can I center a div within another div?
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问题描述
我有问题。我有这样的html代码:
< div id =main_content>
< div id =container>
< / div>
< / div>
css像这样:
#main_content {
top:160px;
left:160px;
width:800px;
min-height:500px;
height:auto;
background-color:#2185C5;
position:relative;
}
#container {
width:auto;
height:auto;
margin:0 auto;
padding:10px;
position:relative;
}
我假设#container将在#main_content内居中。然而,它不是。我只想知道原因和如何使它居中。
解决方案
您需要设置容器的宽度。 ( auto
将无法使用)
#container {
width:640px; / *也可以是百分比。* /
height:auto;
margin:0 auto;
padding:10px;
position:relative;
}
I've got an problem. I have the html code like this:
<div id="main_content" >
<div id="container">
</div>
</div>
The css like this:
#main_content {
top: 160px;
left: 160px;
width: 800px;
min-height: 500px;
height: auto;
background-color: #2185C5;
position: relative;
}
#container {
width: auto;
height: auto;
margin: 0 auto;
padding: 10px;
position: relative;
}
I suppose that the #container will be centered within #main_content. However, it is not. I just want to find out the reason and how to make it centered.
解决方案
You need to set the width of the container. (auto
won't work)
#container {
width: 640px; /*can be in percentage also.*/
height: auto;
margin: 0 auto;
padding: 10px;
position: relative;
}
The CSS reference by MDN explains it all.
Check out these links
- auto - CSS reference | MDN
- margin - CSS reference | MDN
- What is the meaning of
auto
value in a CSS property - StackOverflow
Update - In action @ jsFiddle
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