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Flexbox/Grid依赖于子百分比高度(Firefox/Edge)

grid flexbox css html

AotN · 技术社区 · 7 年前

我一直在试图从一个桌子布局到更现代的东西。我有一个布局,需要一个“固定”的页眉和一个粘性的页脚。为了实现这个目标,我决定稍微改变页面的工作方式,而不是让整个页面滚动,我创建了一个滚动div作为body/footer区域。这将使页眉保持在动态高度的顶部,同时模拟典型页面的滚动方式。

但是,我在flexbox和grid中遇到了相同的问题。只要我没有任何基于百分比的子元素,布局就可以工作。如果有,则flexbox将根据子级调整大小。例如,如果其中一个子级中div的高度设置为100%,则它将显示div,但溢出后的任何其他内容和页脚都将显示在不适当的位置。这似乎有点违反直觉,我希望有人能解释背后的设计选择?是否有任何解决方法允许这种功能?

我基本上认为flexbox系统可以填充剩余的空间(用于身体),但也可以根据需要扩展以包围所有的孩子。

我写了一个简单的例子来说明我在说什么。请看下面,谢谢!

编辑: 这似乎只发生在Firefox和Edge上,而不是Chrome上。

html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

.container {
  display: inline-block;
  height: 100%;
  width: 50%;
  max-height: 100%;
  overflow: auto;
}

.bg {
  background-color: gray;
}

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

.flex {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.flex > .main {
  flex: 1;
}

<div class="container">
  <div class="flex">
    <div class="main">
      <ul>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
      </ul>
    </div>
    <footer>
      This should be a sticky footer
    </footer>
  </div>
</div><div class="container">
  <div class="flex">
    <div class="main">
      <div class="bg span">
        This breaks the page
      </div>
      <ul>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
        <li>This is a spacer</li>
      </ul>
    </div>
    <footer>
      This should be a sticky footer
    </footer>
  </div>
</div>

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