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freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/bootstrap/give-each-element-a-unique-id.md

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---
id: bad87fee1348bd9aec908855
challengeType: 0
forumTopicId: 18191
2020-10-01 17:54:21 +02:00
title: 给每个元素一个唯一的 id
---
## Description
<section id='description'>
我们也可以通过 jQuery 根据每个按钮唯一的 id 来标识出它们。
给你的每一个按钮设置唯一的 id<code>target1</code> 开始,<code>target6</code> 结束。
确保 <code>target1</code><code>target3</code><code>#left-well</code> 之中,<code>target4</code><code>target6</code><code>#right-well</code> 之中。
</section>
## Instructions
<section id='instructions'>
</section>
## Tests
<section id='tests'>
```yml
tests:
- text: 其中一个 <code>button</code> 元素应该有 id <code>target1</code>
testString: assert($("#left-well").children("#target1") && $("#left-well").children("#target1").length > 0);
- text: 其中一个 <code>button</code> 元素应该有 id <code>target2</code>
testString: assert($("#left-well").children("#target2") && $("#left-well").children("#target2").length > 0);
- text: 其中一个 <code>button</code> 元素应该有 id <code>target3</code>
testString: assert($("#left-well").children("#target3") && $("#left-well").children("#target3").length > 0);
- text: 其中一个 <code>button</code> 元素应该有 id <code>target4</code>
testString: assert($("#right-well").children("#target4") && $("#right-well").children("#target4").length > 0);
- text: 其中一个 <code>button</code> 元素应该有 id <code>target5</code>
testString: assert($("#right-well").children("#target5") && $("#right-well").children("#target5").length > 0);
- text: 其中一个 <code>button</code> 元素应该有 id <code>target6</code>
testString: assert($("#right-well").children("#target6") && $("#right-well").children("#target6").length > 0);
```
</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">
<h4>#left-well</h4>
<div class="well" id="left-well">
<button class="btn btn-default target"></button>
<button class="btn btn-default target"></button>
<button class="btn btn-default target"></button>
</div>
</div>
<div class="col-xs-6">
<h4>#right-well</h4>
<div class="well" id="right-well">
<button class="btn btn-default target"></button>
<button class="btn btn-default target"></button>
<button class="btn btn-default target"></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">
<h4>#left-well</h4>
<div class="well" id="left-well">
<button class="btn btn-default target" id="target1"></button>
<button class="btn btn-default target" id="target2"></button>
<button class="btn btn-default target" id="target3"></button>
</div>
</div>
<div class="col-xs-6">
<h4>#right-well</h4>
<div class="well" id="right-well">
<button class="btn btn-default target" id="target4"></button>
<button class="btn btn-default target" id="target5"></button>
<button class="btn btn-default target" id="target6"></button>
</div>
</div>
</div>
</div>
```
</section>