这是设计师一直在处理的一个令人沮丧的问题。诀窍是你需要在CSS中的BODY和HTML上设置高度为100%。

html,body {
    height:100%;
}

这段看似毫无意义的代码是为了向浏览器定义100%的含义。的确令人沮丧，但这是最简单的方法。

下面的代码提供了设置滚动div的最小高度的能力，并通过使用flex使其具有其父div的100%高度。

CSS:

.main {
  display: flex;
  flex-direction: column;
}

.scroll {
  overflow: auto;
  flex: 1 0 50px;
}

HTML:

<div class="main">
  <div class="scroll">
    Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
    Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
    Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
  </div>
</div>

.row-eq-height {
display: -webkit-box;
display: -webkit-flex;
display: -ms-flexbox;
display:         flex;
 }

来自:

http://getbootstrap.com.vn/examples/equal-height-columns/equal-height-columns.css

状态引导，但你不需要引导来使用这个。回答这个老问题，因为这对我来说很管用，而且似乎很容易实现。

这和我对这个问题的回答是一样的

试着让最低利润率达到100%。

margin-bottom: 100%;

将display: grid添加到父节点

我发现，设置两列显示:table-cell;代替float: left;工作得很好。