freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/basic-css/use-clockwise-notation-to-s...

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---
id: bad87fee1348bd9aedf08826
title: Use Clockwise Notation to Specify the Padding of an Element
challengeType: 0
videoUrl: ''
localeTitle: 使用顺时针符号指定元素的填充
---
## Description
<section id="description">不是单独指定元素的<code>padding-top</code> <code>padding-right</code> <code>padding-bottom</code><code>padding-left</code>属性,而是可以在一行中指定它们,如下所示: <code>padding: 10px 20px 10px 20px;</code>这四个值的工作方式类似于时钟:顶部,右侧,底部,左侧,并且将产生与使用侧面特定填充指令完全相同的结果。 </section>
## Instructions
<section id="instructions">使用顺时针符号为“.blue-box”类在其顶部和左侧提供<code>40px</code><code>padding</code> ,但在其底部和右侧仅为<code>20px</code></section>
## Tests
<section id='tests'>
```yml
tests:
- text: 你的<code>blue-box</code>类应该给出<code>40px</code> <code>padding</code>元素的顶部。
testString: 'assert($(".blue-box").css("padding-top") === "40px", "Your <code>blue-box</code> class should give the top of elements <code>40px</code> of <code>padding</code>.");'
- text: 你的<code>blue-box</code>类应该给出<code>20px</code> <code>padding</code>元素的权利。
testString: 'assert($(".blue-box").css("padding-right") === "20px", "Your <code>blue-box</code> class should give the right of elements <code>20px</code> of <code>padding</code>.");'
- text: 你的<code>blue-box</code>类应该给元素的底部提供<code>20px</code><code>padding</code>
testString: 'assert($(".blue-box").css("padding-bottom") === "20px", "Your <code>blue-box</code> class should give the bottom of elements <code>20px</code> of <code>padding</code>.");'
- text: 你的<code>blue-box</code>类应该给元素左边<code>padding</code> <code>40px</code>
testString: 'assert($(".blue-box").css("padding-left") === "40px", "Your <code>blue-box</code> class should give the left of elements <code>40px</code> of <code>padding</code>.");'
- text: 您应该使用顺时针符号来设置<code>blue-box</code>类的填充。
testString: 'assert(!/padding-top|padding-right|padding-bottom|padding-left/.test(code), "You should use the clockwise notation to set the padding of <code>blue-box</code> class.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
.injected-text {
margin-bottom: -25px;
text-align: center;
}
.box {
border-style: solid;
border-color: black;
border-width: 5px;
text-align: center;
}
.yellow-box {
background-color: yellow;
padding: 20px 40px 20px 40px;
}
.red-box {
background-color: crimson;
color: #fff;
padding: 20px 40px 20px 40px;
}
.blue-box {
background-color: blue;
color: #fff;
}
</style>
<h5 class="injected-text">margin</h5>
<div class="box yellow-box">
<h5 class="box red-box">padding</h5>
<h5 class="box blue-box">padding</h5>
</div>
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>