2021-05-05 10:13:49 -07:00
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---
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id: 587d7dbd367417b2b2512bb4
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title: 用 Sass 變量存儲數據
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challengeType: 0
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forumTopicId: 301460
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dashedName: store-data-with-sass-variables
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---
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# --description--
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Sass 不同於 CSS 的一個特點是它允許使用變量。 可以在 Sass 中聲明變量,併爲它賦值,就像在 JavaScript 中一樣。
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在 JavaScript 中,變量是使用 `let` 和 `const` 關鍵字定義的。 在 Sass 中,變量以 `$` 開頭的,後跟變量名。
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這裏有幾個例子:
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```scss
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$main-fonts: Arial, sans-serif;
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$headings-color: green;
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```
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並使用變量:
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```scss
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h1 {
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font-family: $main-fonts;
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color: $headings-color;
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}
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```
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當需要把多個元素設置成相同顏色時,變量就會很有用。 一旦需要更改顏色,只需要改變這個變量的值就好。
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# --instructions--
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創建一個變量 `$text-color` 並將其設置爲 `red`。 然後更改 `.blog-post` 和 `h2` 的 `color` 屬性的值爲 `$text-color` 變量。
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# --hints--
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應該把 `$text-color` 聲明一個值爲 `red` 的 Sass 變量。
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```js
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2021-05-24 00:42:08 -07:00
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assert(code.match(/\$text-color\s*:\s*?red\s*;/g));
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2021-05-05 10:13:49 -07:00
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```
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應使用 `$text-color` 變量來更改 `.blog-post` 和 `h2` 的 `color`。
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```js
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2021-05-24 00:42:08 -07:00
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assert(code.match(/color\s*:\s*\$text-color\s*;?/g));
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2021-05-05 10:13:49 -07:00
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```
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`.blog-post` 元素 `color` 應爲紅色。
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```js
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assert($('.blog-post').css('color') == 'rgb(255, 0, 0)');
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```
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`h2` 元素的 `color` 應爲紅色。
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```js
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assert($('h2').css('color') == 'rgb(255, 0, 0)');
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```
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# --seed--
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## --seed-contents--
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```html
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<style type='text/scss'>
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.header{
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text-align: center;
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}
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.blog-post, h2 {
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color: red;
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}
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</style>
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<h1 class="header">Learn Sass</h1>
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<div class="blog-post">
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<h2>Some random title</h2>
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<p>This is a paragraph with some random text in it</p>
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</div>
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<div class="blog-post">
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<h2>Header #2</h2>
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<p>Here is some more random text.</p>
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</div>
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<div class="blog-post">
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<h2>Here is another header</h2>
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<p>Even more random text within a paragraph</p>
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</div>
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```
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# --solutions--
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```html
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<style type='text/scss'>
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$text-color: red;
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.header{
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text-align: center;
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}
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.blog-post, h2 {
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color: $text-color;
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}
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</style>
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<h1 class="header">Learn Sass</h1>
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<div class="blog-post">
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<h2>Some random title</h2>
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<p>This is a paragraph with some random text in it</p>
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</div>
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<div class="blog-post">
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<h2>Header #2</h2>
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<p>Here is some more random text.</p>
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</div>
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<div class="blog-post">
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<h2>Here is another header</h2>
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<p>Even more random text within a paragraph</p>
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</div>
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```
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