93 lines
1.7 KiB
Markdown
93 lines
1.7 KiB
Markdown
---
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id: bad87fee1348bd9aedf08823
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title: Add a Negative Margin to an Element
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cnpyGs3'
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forumTopicId: 16166
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localeTitle: 给元素添加负外边距
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---
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## Description
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<section id='description'>
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元素的<code>margin（外边距）</code>控制元素<code>border（边框）</code>与其他周围元素之间的距离大小。
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如果你把元素的<code>margin</code>设置为负值，元素会变得更大。
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</section>
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## Instructions
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<section id='instructions'>
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尝试将蓝色框的<code>margin</code>设为负值，跟红色框一样大小。
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蓝色框的<code>margin</code>设置为<code>-15px</code>，它会填满与黄色框之间的距离。
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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<code>margin</code>应该设置为<code>-15px</code>。'
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testString: assert($(".blue-box").css("margin-top") === "-15px");
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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: 10px;
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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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padding: 20px;
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margin: -15px;
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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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padding: 20px;
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margin: 20px;
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}
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</style>
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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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