freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/bootstrap/create-a-class-to-target-wi...

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---
id: bad87fee1348bd9aec908852
title: Create a Class to Target with jQuery Selectors
challengeType: 0
videoUrl: ''
localeTitle: 使用jQuery选择器创建一个目标类
---
## Description
<section id="description">并非每个类都需要具有相应的CSS。有时我们创建类只是为了使用jQuery更容易地选择这些元素。为每个<code>button</code>元素提供类<code>target</code></section>
## Instructions
<section id="instructions">
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: 将<code>target</code>类应用于每个<code>button</code>元素。
testString: 'assert($(".target").length > 5, "Apply the <code>target</code> class to each of your <code>button</code> elements.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<div class="container-fluid">
<h3 class="text-primary text-center">jQuery Playground</h3>
<div class="row">
<div class="col-xs-6">
<div class="well">
<button class="btn btn-default"></button>
<button class="btn btn-default"></button>
<button class="btn btn-default"></button>
</div>
</div>
<div class="col-xs-6">
<div class="well">
<button class="btn btn-default"></button>
<button class="btn btn-default"></button>
<button class="btn btn-default"></button>
</div>
</div>
</div>
</div>
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>