Files
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: 587d7dbe367417b2b2512bb9
title: 使用 @for 創建一個 Sass 循環
challengeType: 0
forumTopicId: 301462
dashedName: use-for-to-create-a-sass-loop
---
# --description--
可以在 Sass 中使用 `@for` 循環添加樣式,它的用法和 JavaScript 中的 `for` 循環類似。
`@for` 以兩種方式使用:“開始 through 結束” 或 “開始 to 結束”。 主要區別在於“開始 **to** 結束”*不包括*結束數字,而“開始 **through** 結束”*包括* 結束號碼。
這是一個開始 **through** 結束的示例:
```scss
@for $i from 1 through 12 {
.col-#{$i} { width: 100%/12 * $i; }
}
```
`#{$i}` 部分是將變量(`i`)與文本組合成字符串的語法。 當 Sass 文件轉換爲 CSS 時,它看起來像這樣:
```scss
.col-1 {
width: 8.33333%;
}
.col-2 {
width: 16.66667%;
}
...
.col-12 {
width: 100%;
}
```
這是創建網格佈局的有效方法。 現在,有了 12 個可用作 CSS class 的列寬選項。
# --instructions--
編寫 `@for` 指令,使 `$j` 的值爲從 1 到 **to** 6。
它應該創建 5 個名爲 `.text-1``.text-5` 的 class其中每個 class 的 `font-size` 設置爲 15px 乘以索引。
# --hints--
應使用 `@for` 指令。
```js
assert(code.match(/@for /g));
```
`.text-1` class 的 `font-size` 應爲 15px。
```js
assert($('.text-1').css('font-size') == '15px');
```
`.text-2` class 的 `font-size` 應爲 30px。
```js
assert($('.text-2').css('font-size') == '30px');
```
`.text-3` class 的 `font-size` 應爲 45px。
```js
assert($('.text-3').css('font-size') == '45px');
```
`.text-4` class 的 `font-size` 應爲 60px。
```js
assert($('.text-4').css('font-size') == '60px');
```
`.text-5` class 的 `font-size` 應爲 75px。
```js
assert($('.text-5').css('font-size') == '75px');
```
# --seed--
## --seed-contents--
```html
<style type='text/scss'>
</style>
<p class="text-1">Hello</p>
<p class="text-2">Hello</p>
<p class="text-3">Hello</p>
<p class="text-4">Hello</p>
<p class="text-5">Hello</p>
```
# --solutions--
```html
<style type='text/scss'>
@for $i from 1 through 5 {
.text-#{$i} { font-size: 15px * $i; }
}
</style>
<p class="text-1">Hello</p>
<p class="text-2">Hello</p>
<p class="text-3">Hello</p>
<p class="text-4">Hello</p>
<p class="text-5">Hello</p>
```
---
```html
<style type='text/scss'>
@for $i from 1 to 6 {
.text-#{$i} { font-size: 15px * $i; }
}
</style>
<p class="text-1">Hello</p>
<p class="text-2">Hello</p>
<p class="text-3">Hello</p>
<p class="text-4">Hello</p>
<p class="text-5">Hello</p>
```