FLEXBOX:div的自动高度垂直填充父级

Question

我有一些需要注意的Flexbox标记.

一切都按预期工作,除了最后一件事.我在列布局中有一些div,其中两个由内容或高度设置控制高度,一个不受控制.最后一个不受高度控制的(DEMO中的黄色)应该采用这样的高度,以便填充其父div中的剩余垂直空间(绿色).

即使使用此响应式设计缩放窗口,黄色div也应始终填充到绿色父div的底部.

<div class="flexbox">
  <div class="col">
    <h3>RED</h3>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>

  </div>

  <div class="col">
    <div class="flexbox2">
      <div>
        <h3>GREEN</h3></div>
      <div class="col1">
        Set at responsive height 10 vw.
      </div>
      <div class="col1">
        This div should adapt its height automatically to fill out the remaining space.
      </div>

    </div>

  </div>

<style>
.flexbox {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: row;
  -moz-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
}

.flexbox .col {
  flex: 1;
}

.flexbox .col:nth-child(1) {
  background: red;
  order: 0;
  padding: 5px;
}

.flexbox .col:nth-child(2) {
  background: green;
  order: 1;
  padding: 5px;
  color: white;
}

.flexbox2 {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  padding: 5px;
}

.flexbox2 .col1 {
  flex: 1;
}

.flexbox2 .col1:nth-child(2) {
  background: orange;
  height: 10vw;
  padding: 5px;
}

.flexbox2 .col1:nth-child(3) {
  background: yellow;
  padding: 5px;
  color: black;
}

</style>

Answer 1

如果列布局不在另一个弹性布局内，则它不会向下延伸。

考虑这些变化：

.flexbox .col:nth-child(2) {
  display: flex;
  ...
}

.flexbox2 .col1 {
  flex: none;  /* Or omit this style altogether. */
}

.flexbox2 .col1:nth-child(3) {
  flex: 1
  ...
}

看来您可以通过简化标记以将.flexbox2元素折叠到其父.col元素中来避免第一次样式更改（例如<div class="col flexbox2">）。

.flexbox {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: row;
  -moz-flex-direction: row;
  -ms-flex-direction: row;
  flex-direction: row;
}

.flexbox .col {
  flex: 1;
}

.flexbox .col:nth-child(1) {
  background: red;
  order: 0;
  padding: 5px;
}

.flexbox .col:nth-child(2) {
  background: green;
  order: 1;
  padding: 5px;
  color: white;
  display: flex;
}

.flexbox2 {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  -moz-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  padding: 5px;
}

.flexbox2 .col1 {
  flex: none;
}

.flexbox2 .col1:nth-child(2) {
  background: orange;
  height: 10vw;
  padding: 5px;
}

.flexbox2 .col1:nth-child(3) {
  background: yellow;
  padding: 5px;
  color: black;
  flex: 1
}

<div class="flexbox">
  <div class="col">
    <h3>RED</h3>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>
    <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est.
      Mauris placerat eleifend leo.</p>

  </div>

  <div class="col">
    <div class="flexbox2">
      <div>
        <h3>GREEN</h3></div>
      <div class="col1">
        Set at responsive height 10 vw.
      </div>
      <div class="col1">
        This div should adapt its height automatically to fill out the remaining space.
      </div>

    </div>

  </div>