两列弹性框布局

Question

我需要创建布局,其中包含两列中的项目列表.就像我在下面展示的:

.container {
  border: 1px solid red;
  height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.item {
  border: 1px dashed blue;
  height: 50px;
}

<div class="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
  <div class="item">6</div>
  <div class="item">7</div>
  <div class="item">8</div>
</div>

但是这种布局存在问题.如果只有一个项目 - 它将占用全宽.即使有一些项目,我也需要保留列.

Answer 1

您可以为项目设置最大宽度,等于50%.无论如何,这将保持几乎相同的宽度.我说几乎是因为你也设置了边框.

为了保持宽度完全相同,您还必须为item设置box-sizing:border-box.

所以,你的代码将是:

.item {
  border: 1px dashed blue;
  height: 50px;
  box-sizing: border-box;
  max-width: 50%;
}

.container {
  border: 1px solid red;
  height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.item {
  border: 1px dashed blue;
  height: 50px;
  box-sizing: border-box;
  max-width: 50%;
}

<div class="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
  <div class="item">6</div>
  <div class="item">7</div>
  <div class="item">8</div>
</div>

Answer 2

我更喜欢使用下面的代码：

.container {
  display: flex;
  flex-wrap: wrap;
}

.item {
  flex-basis: 50%;
  box-sizing: border-box;
}