使用 display:flex 使用 CSS 填滿剩餘的垂直空間

Question

在3行佈局中：頂行的大小應根據其內容而定底行應具有固定的高度（以像素為單位）中間行應展開以填充容器問題在於，隨著主要內容的擴展，它會擠壓頁眉與頁腳：section{display:flex;flex-flow:column;align-items:stretch;height:300px;}header{flex:01auto;background:tomato;}div{flex:11auto

P粉555696738 · Answer

下面的範例包括當展開的中心元件的內容超出其邊界時的滾動行為。此外，中心組件佔用視窗中 100% 的剩餘空間。

jsfiddle 這裡

#

html, body, .r_flex_container{
    height: 100%;
    display: flex;
    flex-direction: column;
    background: red;
    margin: 0;
}
.r_flex_container {
    display:flex;
    flex-flow: column nowrap;
    background-color:blue;
}

.r_flex_fixed_child {
    flex:none;
    background-color:black;
    color:white;

}
.r_flex_expand_child {
    flex:auto;
    background-color:yellow;
    overflow-y:scroll;
}

可用於示範此行為的 html 範例

This is the fixed 'header' child of the flex container

this child container expands to use all of the space given to it - but could be shared with other expanding childs in which case they would get equal space after the fixed container space is allocated.
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus. Phasellus viverra nulla ut metus varius laoreet. Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero, sit amet adipiscing sem neque sed ipsum. Nam quam nunc, blandit vel, luctus pulvinar, hendrerit id, lorem. Maecenas nec odio et ante tincidunt tempus. Donec vitae sapien ut libero venenatis faucibus. Nullam quis ante. Etiam sit amet orci eget eros faucibus tincidunt. Duis leo. Sed fringilla mauris sit amet nibh. Donec sodales sagittis magna. Sed consequat, leo eget bibendum sodales, augue velit cursus nunc,

this is the fixed footer child of the flex container
asdfadsf
another line

P粉018548441 · Answer

簡單一點：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*/
}


  
    header: sized to content
    
(but is it really?)
  
  
    main content: fills remaining space
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    footer: fixed height in px

php8，我來也

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