101 lines
2.3 KiB
Markdown
101 lines
2.3 KiB
Markdown
---
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id: 587d781c367417b2b2512abf
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title: Decrease the Opacity of an Element
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/c7aKqu4'
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forumTopicId: 301055
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localeTitle: 降低元素的 opactiy
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---
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## Description
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<section id='description'>
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CSS 里的 <code>opacity</code> 属性用来设置元素的透明度。
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<blockquote>值 1 代表完全不透明。<br>值 0.5 代表半透明。<br>值 0 代表完全透明。</blockquote>
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透明度会应用到元素内的所有内容，不论是图片，还是文本，或是背景色。
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</section>
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## Instructions
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<section id='instructions'>
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使用 <code>links</code> class 选择所有的超链接并设置其 <code>opacity</code> 值为 0.7。
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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: '你应该使用 <code>links</code> class 选择所有的超链接并设置其 <code>opacity</code> 值为 0.7。'
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testString: assert(/\.links\s*{([\s\S]*?;)*\s*opacity\s*:\s*0*\.70*\s*(;[\s\S]*?|\s*)}/.test($('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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h4 {
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text-align: center;
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background-color: rgba(45, 45, 45, 0.1);
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padding: 10px;
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font-size: 27px;
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}
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p {
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text-align: justify;
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}
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.links {
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text-align: left;
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color: black;
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}
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#thumbnail {
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box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
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}
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.fullCard {
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width: 245px;
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border: 1px solid #ccc;
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border-radius: 5px;
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margin: 10px 5px;
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padding: 4px;
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}
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.cardContent {
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padding: 10px;
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}
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.cardText {
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margin-bottom: 30px;
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}
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</style>
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<div class="fullCard" id="thumbnail">
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<div class="cardContent">
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<div class="cardText">
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<h4>Alphabet</h4>
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<hr>
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<p><em>Google 由在<strong>斯坦福大学</strong>攻读<u>理工博士</u>的拉里·佩奇和谢尔盖·布林共同创建。</em></p>
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</div>
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<div class="cardLinks">
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<a href="https://en.wikipedia.org/wiki/Larry_Page" target="_blank" class="links">拉里·佩奇</a><br><br>
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<a href="https://en.wikipedia.org/wiki/Sergey_Brin" target="_blank" class="links">谢尔盖·布林</a>
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</div>
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</div>
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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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