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

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---
id: 587d78ad367417b2b2512afa
title: Use the flex-wrap Property to Wrap a Row or Column
challengeType: 0
videoUrl: ''
localeTitle: 使用flex-wrap属性包装行或列
---
## Description
<section id="description"> CSS flexbox具有将flex项分割为多行或列的功能。默认情况下Flex容器将所有Flex项目放在一起。例如一行将全部在一行上。但是使用<code>flex-wrap</code>属性它会告诉CSS包装项目。这意味着额外的项目将移动到新的行或列中。包装发生的断点取决于物品的大小和容器的大小。 CSS还有包装方向的选项 <ul><li> <code>nowrap</code> :这是默认设置,不包装项目。 </li><li> <code>wrap</code> :如果项目在一行中,则从左到右包装,如果它们在列中,则从上到下包装。 </li><li> <code>wrap-reverse</code> :如果项目在一行中,则从下到上包装项目;如果它们在列中,则从右到左包装。 </li></ul></section>
## Instructions
<section id="instructions">当前布局对于一行有太多的框。将CSS属性<code>flex-wrap</code>添加到<code>#box-container</code>元素并为其赋值wrap。 </section>
## Tests
<section id='tests'>
```yml
tests:
- text: '<code>#box-container</code>元素应该将<code>flex-wrap</code>属性设置为wrap值。'
testString: 'assert($("#box-container").css("flex-wrap") == "wrap", "The <code>#box-container</code> element should have the <code>flex-wrap</code> property set to a value of wrap.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
#box-container {
background: gray;
display: flex;
height: 100%;
}
#box-1 {
background-color: dodgerblue;
width: 25%;
height: 50%;
}
#box-2 {
background-color: orangered;
width: 25%;
height: 50%;
}
#box-3 {
background-color: violet;
width: 25%;
height: 50%;
}
#box-4 {
background-color: yellow;
width: 25%;
height: 50%;
}
#box-5 {
background-color: green;
width: 25%;
height: 50%;
}
#box-6 {
background-color: black;
width: 25%;
height: 50%;
}
</style>
<div id="box-container">
<div id="box-1"></div>
<div id="box-2"></div>
<div id="box-3"></div>
<div id="box-4"></div>
<div id="box-5"></div>
<div id="box-6"></div>
</div>
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>