css - 使用 display :flex 用 CSS 填充剩余的垂直空间

Question

在 3 行布局中:

• 顶行应根据其内容调整大小
• 底行应该有固定的像素高度
• 中间一行应该展开以填满容器

问题是随着主要内容的扩展，它挤压了页眉和页脚行:

section {
  display: flex;
  flex-flow: column;
  align-items: stretch;
  height: 300px;
}
header {
  flex: 0 1 auto;
  background: tomato;
}
div {
  flex: 1 1 auto;
  background: gold;
  overflow: auto;
}
footer {
  flex: 0 1 60px;
  background: lightgreen;
  /* fixes the footer: min-height: 60px; */
}

<section>
  <header>
    header: sized to content
    <br>(but is it really?)
  </header>
  <div>
    main content: fills remaining space<br>
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- uncomment to see it break - ->
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- -->
  </div>
  <footer>
    footer: fixed height in px
  </footer>
</section>

fiddle :

• http://jsfiddle.net/7yLFL/1/ (工作，内容不多)
• http://jsfiddle.net/7yLFL/ (已损坏，内容较多)

我很幸运，我可以使用最新最好的 CSS，而不考虑旧版浏览器。我想我可以使用 flex 布局来最终摆脱旧的基于表格的布局。出于某种原因，它没有按照我的意愿行事...

作为记录，SO 上有很多关于“填充剩余高度”的相关问题，但没有解决我在使用 flex 时遇到的问题。引用:

• Make a div fill the height of the remaining screen space
• Fill remaining vertical space - only CSS
• Have a div to fill out the remaining height/width of a container when sharing it with another div?
• Make nested div stretch to 100% of remaining container div height
• How can I make my flexbox layout take 100% vertical space?
• 等等

Answer 1

简单点: DEMO

section {
  display: flex;
  flex-flow: column;
  height: 300px;
}

header {
  background: tomato;
  /* no flex rules, it will grow */
}

div {
  flex: 1;  /* 1 and it will fill whole space left if no flex value are set to other children*/
  background: gold;
  overflow: auto;
}

footer {
  background: lightgreen;
  min-height: 60px;  /* min-height has its purpose :) , unless you meant height*/
}

<section>
  <header>
    header: sized to content
    <br/>(but is it really?)
  </header>
  <div>
    main content: fills remaining space<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- uncomment to see it break -->
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- -->
  </div>
  <footer>
    footer: fixed height in px
  </footer>
</section>

全屏版

section {
  display: flex;
  flex-flow: column;
  height: 100vh;
}

header {
  background: tomato;
  /* no flex rules, it will grow */
}

div {
  flex: 1;
  /* 1 and it will fill whole space left if no flex value are set to other children*/
  background: gold;
  overflow: auto;
}

footer {
  background: lightgreen;
  min-height: 60px;
  /* min-height has its purpose :) , unless you meant height*/
}

body {
  margin: 0;
}

<section>
  <header>
    header: sized to content
    <br/>(but is it really?)
  </header>
  <div>
    main content: fills remaining space<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- uncomment to see it break -->
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br> x
    <br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>
    <!-- -->
  </div>
  <footer>
    footer: fixed height in px
  </footer>
</section>