118 lines
2.0 KiB
Markdown
118 lines
2.0 KiB
Markdown
---
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id: 587d7dbd367417b2b2512bb5
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title: Nest CSS with Sass
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challengeType: 0
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forumTopicId: 301457
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localeTitle: 用 Sass 嵌套 CSS
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---
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## Description
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<section id='description'>
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Sass 允许 CSS 规则的<code>嵌套</code>，这在写样式表的时候会很有用。
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在 CSS 里，每个元素的样式都需要写在独立的代码块中，如下所示：
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```scss
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nav {
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background-color: red;
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}
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nav ul {
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list-style: none;
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}
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nav ul li {
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display: inline-block;
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}
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```
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对于一个大型项目，CSS 规则会很复杂。这时，引入<code>嵌套</code>功能（即在对应的父元素中写子元素的样式）可以有效地简化代码：
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```scss
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nav {
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background-color: red;
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ul {
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list-style: none;
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li {
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display: inline-block;
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}
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}
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}
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```
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</section>
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## Instructions
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<section id='instructions'>
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根据上面关于嵌套的例子，来简化<code>.blog-post<code>中两个子元素的 CSS 代码。出于测试目的，<code>h1</code>应该出现在<code>p</code>元素之前。
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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: 你应重新组织 CSS 规则，以便<code>h1</code>和<code>p</code>嵌套在<code>.blog-post</code>父元素中。
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testString: assert(code.match(/\.blog-post\s*?{\s*?h1\s*?{\s*?text-align:\s*?center;\s*?color:\s*?blue;\s*?}\s*?p\s*?{\s*?font-size:\s*?20px;\s*?}\s*?}/gi));
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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 type='text/sass'>
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.blog-post {
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}
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h1 {
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text-align: center;
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color: blue;
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}
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p {
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font-size: 20px;
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}
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</style>
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<div class="blog-post">
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<h1>Blog Title</h1>
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<p>This is a paragraph</p>
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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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<style type='text/sass'>
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.blog-post {
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h1 {
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text-align: center;
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color: blue;
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}
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p {
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font-size: 20px;
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}
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}
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</style>
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<div class="blog-post">
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<h1>Blog Title</h1>
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<p>This is a paragraph</p>
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</div>
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```
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</section>
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