freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/css-flexbox/use-the-flex-direction-prop...

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---
id: 587d78ab367417b2b2512af2
title: Use the flex-direction Property to Make a Row
challengeType: 0
videoUrl: ''
localeTitle: 使用flex-direction属性创建一行
---
## Description
<section id="description">添加<code>display: flex</code> to a element将其转换为flex容器。这使得可以将该元素的任何子节点对齐成行或列。您可以通过将<code>flex-direction</code>属性添加到父项并将其设置为行或列来完成此操作。创建行将水平对齐子项,创建列将垂直对齐子项。 <code>flex-direction</code>其他选项是row-reverse和column-reverse。 <strong>注意</strong> <br> <code>flex-direction</code>属性的默认值为row。 </section>
## Instructions
<section id="instructions">将CSS属性<code>flex-direction</code>添加到<code>#box-container</code>元素并为其赋值row-reverse。 </section>
## Tests
<section id='tests'>
```yml
tests:
- text: '<code>#box-container</code>元素的<code>flex-direction</code>属性应设置为row-reverse。'
testString: 'assert($("#box-container").css("flex-direction") == "row-reverse", "The <code>#box-container</code> element should have a <code>flex-direction</code> property set to row-reverse.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
#box-container {
display: flex;
height: 500px;
}
#box-1 {
background-color: dodgerblue;
width: 50%;
height: 50%;
}
#box-2 {
background-color: orangered;
width: 50%;
height: 50%;
}
</style>
<div id="box-container">
<div id="box-1"></div>
<div id="box-2"></div>
</div>
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>