如何水平放置< div>居中? [英] How to horizontally center a <div>?

问题描述

如何使用CSS将<div>在另一个<div>中的水平居中位置?

How can I horizontally center a <div> within another <div> using CSS?

<div id="outer">
  <div id="inner">Foo foo</div>
</div>

推荐答案

您可以将此CSS应用于内部<div>:

You can apply this CSS to the inner <div>:

#inner {
  width: 50%;
  margin: 0 auto;
}

当然，您不必将width设置为50%.小于包含的<div>的任何宽度都将起作用. margin: 0 auto是实际居中的内容.

Of course, you don't have to set the width to 50%. Any width less than the containing <div> will work. The margin: 0 auto is what does the actual centering.

如果您定位到 Internet Explorer 8 (及更高版本)，则最好设置而是:

If you are targeting Internet Explorer 8 (and later), it might be better to have this instead:

#inner {
  display: table;
  margin: 0 auto;
}

它将使内部元素水平居中，并且无需设置特定的width即可工作.

It will make the inner element center horizontally and it works without setting a specific width.

此处的工作示例:

#inner {
  display: table;
  margin: 0 auto;
  border: 1px solid black;
}

#outer {
  border: 1px solid red;
  width:100%
}

<div id="outer">
  <div id="inner">Foo foo</div>
</div>

使用flex-box，可以轻松地水平和垂直居中设置div的样式.

With flex-box, it is very easy to style the div horizontally and vertically centered.

#inner {  
  border: 1px solid black;
}

#outer {
  border: 1px solid red;
  width:100%
  display: flex;
  justify-content: center;
}

<div id="outer">
  <div id="inner">Foo foo</div>
</div>

要同时使div垂直居中对齐，请使用属性align-items: center.

To align the div vertically centered also, use property align-items: center.

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