97 lines
2.7 KiB
Markdown
97 lines
2.7 KiB
Markdown
---
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id: bad87fee1348bd9afdf08726
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cnpybAd'
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forumTopicId: 18345
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title: 使用顺时针方向指定元素的外边距
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---
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## Description
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<section id='description'>
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让我们再试一次，不过这一次轮到<code>margin</code>了。
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同样，每个方向的外边距值可以在<code>margin</code>属性里面汇总声明，来代替分别声明<code>margin-top</code>，<code>margin-right</code>，<code>margin-bottom</code>和<code>margin-left</code>属性的方式，代码如下：
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<code>margin: 10px 20px 10px 20px;</code>
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这四个值按顺时针排序：上，右，下，左，并且设置的效果等同于特定声明每一个方向的<code>margin</code>。
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</section>
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## Instructions
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<section id='instructions'>
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按照顺时针顺序，给".blue-box" class的上外边距以及左外边距设置为<code>40px</code>，右外边距和下外边距则设置为<code>20px</code>。
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>blue-box</code> class 的上外边距应为<code>40px</code>。
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testString: assert($(".blue-box").css("margin-top") === "40px");
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- text: <code>blue-box</code> class 的右外边距应为<code>20px</code>。
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testString: assert($(".blue-box").css("margin-right") === "20px");
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- text: <code>blue-box</code> class 的下外边距应为<code>20px</code>。
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testString: assert($(".blue-box").css("margin-bottom") === "20px");
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- text: <code>blue-box</code> class 的左外边距应为<code>40px</code>。
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testString: assert($(".blue-box").css("margin-left") === "40px");
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- text: 你应该沿顺时针方向设置<code>blue-box</code>的外边距。
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testString: const removeCssComments = str => str.replace(/\/\*[\s\S]+?\*\//g, '');assert(/\.blue-box\s*{[\s\S]*margin[\s]*:\s*\d+px\s+\d+px\s+\d+px\s+\d+px(;\s*[^}]+\s*}|;?\s*})/.test(removeCssComments($('style').text())));
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<style>
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.injected-text {
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margin-bottom: -25px;
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text-align: center;
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}
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.box {
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border-style: solid;
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border-color: black;
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border-width: 5px;
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text-align: center;
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}
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.yellow-box {
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background-color: yellow;
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padding: 20px 40px 20px 40px;
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}
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.red-box {
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background-color: crimson;
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color: #fff;
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margin: 20px 40px 20px 40px;
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}
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.blue-box {
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background-color: blue;
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color: #fff;
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}
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</style>
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<h5 class="injected-text">margin</h5>
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<div class="box yellow-box">
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<h5 class="box red-box">padding</h5>
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<h5 class="box blue-box">padding</h5>
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</div>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```html
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// solution required
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```
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</section>
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