CSS容器div没有得到高度。

I want my container div to get the height of max of its children's height. without knowing what height the child divs are going to have. I was trying out on JSFiddle. The container div is on red. which is not showing up. Why?

我想要我的容器div得到它的子高度的最大值。不知道孩子的身高是多少。我在试验JSFiddle。容器div是红色的。没有出现。为什么?

5 个解决方案

#1

Add the following property:

添加以下属性:

.c{
    ...
    overflow: hidden;
}

This will force the container to respect the height of all elements within it, regardless of floating elements.
http://jsfiddle.net/gtdfY/3/

这将迫使容器尊重其中所有元素的高度，而不考虑浮动元素。http://jsfiddle.net/gtdfY/3/

UPDATE

Recently, I was working on a project that required this trick, but needed to allow overflow to show, so instead, you can use a pseudo-element to clear your floats, effectively achieving the same effect while allowing overflow on all elements.

最近，我正在研究一个需要这个技巧的项目，但是需要允许溢出来显示，所以，您可以使用一个伪元素来清除浮动，有效地实现相同的效果，同时允许溢出所有元素。

.c:after{
    clear: both;
    content: "";
    display: block;
}

http://jsfiddle.net/gtdfY/368/

http://jsfiddle.net/gtdfY/368/

#2

You are floating the children which means they "float" in front of the container. In order to take the correct height, you must "clear" the float

你在浮动孩子们，这意味着他们“漂浮”在容器的前面。为了得到正确的高度，你必须“清除”浮动

The div style="clear: both" clears the floating an gives the correct height to the container. see http://css.maxdesign.com.au/floatutorial/clear.htm for more info on floats.

div样式="clear: both"清除浮动an，为容器提供正确的高度。有关浮点数的更多信息，请参见http://css.maxdesign.com.au/floatutorial/clear.htm。

eg.

如。

<div class="c">
    <div class="l">

    </div>
    <div class="m">
        World
    </div>
    <div style="clear: both" />
</div>

#3

It is not that easier?

这不是更容易吗?

.c {
    overflow: auto;
}

#4

Try inserting this clearing div before the last </div>

尝试在最后一个之前插入这个清理div

<div style="clear: both; line-height: 0;">&nbsp;</div>

< div风格= "明确:;行高:0;" >,< / div >

#5

The best and the most bulletproof solution is to add ::before and ::after pseudoelements to the container. So if you have for example a list like:

最好和最防弹的解决方案是在容器中添加:before和:after赝元素。如果你有一个列表，比如

<ul class="clearfix">
    <li></li>
    <li></li>
    <li></li>
</ul>

And every elements in the list has float:left property, then you should add to your css:

列表中的每个元素都有float:left属性，那么你应该添加到css中:

.clearfix::after, .clearfix::before {
     content: '';
     clear: both;
     display: table;
}

Or you could try display:inline-block; property, then you don't need to add any clearfix.

或者你可以试试display:inline-block;属性，然后不需要添加任何clearfix。