html - 如何在不为每个 child 添加 100% 高度的情况下使 child 的 100% 高度成为其 flexbox parent 的高度

Question

我的网站上有一行嵌套列，它有 Bootstrap 3。.column 类有背景。我希望背景颜色在不更改 HTML 的情况下填满整个高度。

如果我将 height: 100%; 添加到嵌套行、bootstrap col 和它们的列类中，我会得到我想要的结果，但是是否可以更轻松地编写它？

这是我的代码

https://codepen.io/Insane415/pen/rZWYOE

<div class="container">
   <div class="row sub-heading">
      <div class="col-xs-12 col-sm-12 col-md-6">
         <div class="column">
            Lorem Ipsum Lorem Ipsum <br>Break
         </div>
      </div>
      <div class="col-xs-12 col-sm-12 col-md-6">
         <div class="row sub-heading full-height">
            <div class="col-xs-4 full-height">
               <div class="column full-height"></div>
            </div>
            <div class="col-xs-4">
               <div class="column"></div>
            </div>
            <div class="col-xs-4">
               <div class="column"></div>
            </div>
         </div>
      </div>
   </div>
</div>

.sub-heading {
  display: flex;
}

.column {
  background: #fce6cc;
  position: relative;
  margin: 0 -13px;
  min-height: 30px;
  padding: 0 15px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.full-height {
  height: 100%;
}

Answer 1

不改变 HTML:

.sub-heading {
  height: 100%;
}

.sub-heading > div {
  background: pink;
}

.column {
  position: relative;
  margin: 0 -13px;
  min-height: 30px;
  padding: 0 15px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

@media screen and (min-width: 768px) {
  .sub-heading {
    display: flex;
  }
  
  .sub-heading > div {
    border-left: 5px solid #fff;
    border-right: 15px solid #fff;
  }
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
   <div class="row sub-heading">
      <div class="col-xs-12 col-sm-12 col-md-6">
         <div class="column">
            Lorem Ipsum Lorem Ipsum <br>Break
         </div>
      </div>
      
     <div class="col-xs-12 col-sm-12 col-md-6">
         <div class="row sub-heading full-height">
            <div class="col-xs-4 full-height">
               <div class="column full-height"></div>
            </div>
            <div class="col-xs-4">
               <div class="column"></div>
            </div>
            <div class="col-xs-4">
               <div class="column"></div>
            </div>
         </div>
      </div>
   </div>
</div>