# Flex布局

- order: 4 

Flex 布局基础。

使用 `row-flex` 定义 `flex` 布局，其子元素根据不同的值 `start`,`center`,`end`,`space-between`,`space-around`，分别定义其在父节点里面的排版方式。

---

````html
<p>子元素居左排列</p>
<div class="row-flex row-flex-start">
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
</div>

<p>子元素居中排列</p>
<div class="row-flex row-flex-center">
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
</div>

<p>子元素居右排列</p>
<div class="row-flex row-flex-end">
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
</div>

<p>子元素等宽排列</p>
<div class="row-flex row-flex-space-between">
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
</div>

<p>子元素分散对齐</p>
<div class="row-flex row-flex-space-around">
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
  <div class="col-4">2</div>
</div>

````