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freeCodeCamp/curriculum/challenges/chinese-traditional/03-front-end-libraries/sass/extend-one-set-of-css-styles-to-another-element.md
Nicholas Carrigan (he/him) 3da4be21bb chore: seed chinese traditional (#42005)
Seeds the chinese traditional files manually so we can deploy to
staging.
2021-05-05 22:43:49 +05:30

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---
id: 587d7fa5367417b2b2512bbd
title: 將一組 CSS 樣式擴展到另一個元素
challengeType: 0
forumTopicId: 301456
dashedName: extend-one-set-of-css-styles-to-another-element
---
# --description--
Sass 有一個名爲 `extend` 的功能,可以很容易地從一個元素中借用 CSS 規則並在另一個元素上重用它們。
例如,下面的 CSS 規則塊設置了 `.panel` class 的樣式。 它有 `background-color``height``border`
```scss
.panel{
background-color: red;
height: 70px;
border: 2px solid green;
}
```
現在需要另一個名爲 `.big-panel` 的面板。 它具有與 `.panel` 相同的基本屬性,但還需要 `width``font-size`。 可以從 `.panel` 複製並粘貼初始 CSS 規則,但是當添加更多類型的面板時,代碼會變得重複。 `extend` 指令是一種重用爲一個元素編寫的規則的簡單方法,可以爲另一個元素重用並添加更多規則:
```scss
.big-panel{
@extend .panel;
width: 150px;
font-size: 2em;
}
```
除了新樣式之外,`.big-panel` 將具有與 `.panel` 相同的屬性。
# --instructions--
創建一個擴展 `.info` 的 class `.info-important`,並將`background-color` 設置爲洋紅色magenta
# --hints--
`info-important` class 應該將 `background-color` 設置爲 `magenta`
```js
assert(
code.match(
/\.info-important\s*?{[\s\S]*background-color\s*?:\s*?magenta\s*?;[\s\S]*}/gi
)
);
```
`info-important` class 應使用 `@extend` 繼承 `info` class 的樣式。
```js
assert(
code.match(/\.info-important\s*?{[\s\S]*@extend\s*?.info\s*?;[\s\S]*/gi)
);
```
# --seed--
## --seed-contents--
```html
<style type='text/scss'>
h3{
text-align: center;
}
.info{
width: 200px;
border: 1px solid black;
margin: 0 auto;
}
</style>
<h3>Posts</h3>
<div class="info-important">
<p>This is an important post. It should extend the class ".info" and have its own CSS styles.</p>
</div>
<div class="info">
<p>This is a simple post. It has basic styling and can be extended for other uses.</p>
</div>
```
# --solutions--
```html
<style type='text/scss'>
h3{
text-align: center;
}
.info{
width: 200px;
border: 1px solid black;
margin: 0 auto;
}
.info-important{
@extend .info;
background-color: magenta;
}
</style>
<h3>Posts</h3>
<div class="info-important">
<p>This is an important post. It should extend the class ".info" and have its own CSS styles.</p>
</div>
<div class="info">
<p>This is a simple post. It has basic styling and can be extended for other uses.</p>
</div>
```