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freeCodeCamp/curriculum/challenges/chinese-traditional/03-front-end-development-libraries/sass/extend-one-set-of-css-styles-to-another-element.md
Shaun Hamilton c2a11ad00d feat: add 'back/front end' in curriculum (#42596)
* chore: rename APIs and Microservices to include "Backend" (#42515)

* fix typo

* fix typo

* undo change

* Corrected grammar mistake

Corrected a grammar mistake by removing a comma.

* change APIs and Microservices cert title

* update title

* Change APIs and Microservices certi title

* Update translations.json

* update title

* feat(curriculum): rename apis and microservices cert

* rename folder structure

* rename certificate

* rename learn Markdown

* apis-and-microservices -> back-end-development-and-apis

* update backend meta

* update i18n langs and cypress test

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

* fix: add development to front-end libraries (#42512)

* fix: added-the-word-Development-to-front-end-libraries

* fix/added-the-word-Development-to-front-end-libraries

* fix/added-word-development-to-front-end-libraries-in-other-related-files

* fix/added-the-word-Development-to-front-end-and-all-related-files

* fix/removed-typos-from-last-commit-in-index.md

* fix/reverted-changes-that-i-made-to-dependecies

* fix/removed xvfg

* fix/reverted changes that i made to package.json

* remove unwanted changes

* front-end-development-libraries changes

* rename backend certSlug and README

* update i18n folder names and keys

* test: add legacy path redirect tests

This uses serve.json from the client-config repo, since we currently use
that in production

* fix: create public dir before moving serve.json

* fix: add missing script

* refactor: collect redirect tests

* test: convert to cy.location for stricter tests

* rename certificate folder to 00-certificates

* change crowdin config to recognise new certificates location

* allow translations to be used

Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>

* add forwards slashes to path redirects

* fix cypress path tests again

* plese cypress

* fix: test different challenge

Okay so I literally have no idea why this one particular challenge
fails in Cypress Firefox ONLY. Tom and I paired and spun a full build
instance and confirmed in Firefox the page loads and redirects as
expected. Changing to another bootstrap challenge passes Cypress firefox
locally. Absolutely boggled by this.

AAAAAAAAAAAAAAA

* fix: separate the test

Okay apparently the test does not work unless we separate it into
a different `it` statement.

>:( >:( >:( >:(

Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com>
Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com>
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
2021-08-13 21:57:13 -05:00

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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>
```