freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/bootstrap/create-a-class-to-target-with-jquery-selectors.chinese.md

---
id: bad87fee1348bd9aec908852
title: Create a Class to Target with jQuery Selectors
challengeType: 0
forumTopicId: 16815
localeTitle: 分别给每个目标元素的 class 属性添加一个 target 值
---

## Description
<section id='description'>
并不是所有 class 属性都需要有对应的 CSS 样式。有时候我们设置 class 只是为了更方便地在 jQuery 中选中这些元素。
为每一个 <code>button</code> 元素添加 <code>target</code> class。
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: 给你的每一个 <code>button</code> 元素设置 <code>target</code> class。
    testString: assert($(".target").length > 5);

```

</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'>

```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="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
      </div>
    </div>
    <div class="col-xs-6">
      <div class="well">
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
        <button class="target btn btn-default"></button>
      </div>
    </div>
  </div>
</div>
```

</section>