css max-height inside max-height [英] css max-height inside max-height

问题描述

我试图编写一个聊天页面，但我有一个问题，大小的divs：/
我有一个这样的结构：

I am trying to code a chat page but I got a problem with the sizing of the divs :/ I have a structure like this:

<div class="page">
  <div class="chat-holder">
    <div class="chat-text">
    </div>
  </div>
</div>

，页面类（比如说屏幕的宽度和高度， p>

and the page class is (let's say the width and the height of the screen so it is

.page {
  width: 100%;
  height: 100%;
}

聊天持有者我想要宽度为740px，高度应该是任何高度，但不能超过浏览器的高度和一个背景白色和20像素padding周围的聊天区域（到目前为止我试过这个）：

The chat-holder I want to have a width of 740px and the height should be any height but not more than the browser height and a background white and a 20px padding around the chat area (so far I tried this):

.chat-holder {
  background: #fff;
  width: 740px;
  max-height: 100%;
  padding: 20px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
}

我的聊天区域我想有一个1px的黑色边框在这个聊天持有者，如果聊天不大于浏览器减去那个40px填充，我想它有它的文本的大小，如果它是更大，我想让它有滚动内部（到目前为止我试过这个）

Now my chat area I want to have a 1px black border inside this chat-holder and if the chat is not bigger than the browser minus that 40px padding, I want it to have the size of the text that is in it. If it is bigger, I want it to have scroll inside it (so far I tried this)

.chat-text {
  width: 100%;
  max-height: 100%;
  border: 1px solid #000;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  overflow: auto;
}

但这不起作用，聊天文本div聊天持有者，因为我看到是因为max-height在max-height内部不工作。我希望这个问题有一个解决方法，因为我真的不想使用jQuery或其他东西来修复它。

But this doesn't work, the chat-text div goes out of the chat-holder, as i see it is because the max-height doesn't work inside a max-height. I hope there is a work-around on this issue because I really don't want to use jQuery or something to fix it.

提前感谢你

编辑：jsFiddle http://jsfiddle.net/KjX7s/2/

jsFiddle http://jsfiddle.net/KjX7s/2/

推荐答案

您必须设置高度以及最大高度：

You have to set the height as well as the max-height:

.page {
  width: 100%;
  height: 100%;
}
.chat-holder {
  background: #fff;
  width: 740px;
  min-height: 20px;
  max-height: 100%;
  padding: 20px;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
}
.chat-text {
  width: 100%;
  min-height: 20px;
  max-height: 100%;
  border: 1px solid #000;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  overflow: auto;
}

查看小提琴： http://jsfiddle.net/KjX7s/14/

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