我有一个类似这样的页面结构:
<body>
<div id="parent">
<div id="childRightCol">
/*Content*/
</div>
<div id="childLeftCol">
/*Content*/
</div>
</div>
</body>
我想为父div扩大高度时，内部div的高度增加。
编辑: 一个问题是，如果子内容的宽度扩展超过浏览器窗口的宽度，我目前的CSS把一个水平滚动条上的父div。我希望滚动条是在页面级别。目前我的父div被设置为溢出:auto;
你能帮我做这个的CSS吗?
当前回答
这是规范所描述的功能-这里的几个答案是有效的，并与以下内容一致:
If it has block-level children, the height is the distance between the top border-edge of the topmost block-level child box that doesn't have margins collapsed through it and the bottom border-edge of the bottommost block-level child box that doesn't have margins collapsed through it. However, if the element has a nonzero top padding and/or top border, or is the root element, then the content starts at the top margin edge of the topmost child. (The first case expresses the fact that the top and bottom margins of the element collapse with those of the topmost and bottommost children, while in the second case the presence of the padding/border prevents the top margins from collapsing.) Similarly, if the element has a nonzero bottom padding and/or bottom border, then the content ends at the bottom margin edge of the bottommost child.
网址:https://www.w3.org/TR/css3-box/#blockwidth
其他回答
与其设置height属性，不如使用min-height。
你正在寻找一个2列CSS布局?
如果是这样，看看说明，开始是非常简单的。
Add
clear:both;
添加到父div的css中，或者在父div的底部添加一个div，即清除:both;
这是正确答案，因为overflow:auto;可能工作于简单的网页布局，但会混乱的元素开始使用的东西，如负边距等
这是规范所描述的功能-这里的几个答案是有效的，并与以下内容一致:
If it has block-level children, the height is the distance between the top border-edge of the topmost block-level child box that doesn't have margins collapsed through it and the bottom border-edge of the bottommost block-level child box that doesn't have margins collapsed through it. However, if the element has a nonzero top padding and/or top border, or is the root element, then the content starts at the top margin edge of the topmost child. (The first case expresses the fact that the top and bottom margins of the element collapse with those of the topmost and bottommost children, while in the second case the presence of the padding/border prevents the top margins from collapsing.) Similarly, if the element has a nonzero bottom padding and/or bottom border, then the content ends at the bottom margin edge of the bottommost child.
网址:https://www.w3.org/TR/css3-box/#blockwidth
试着给父母的高度max-content。
.parent{
height: max-content;
}
https://jsfiddle.net/FreeS/so4L83wu/5/
