Files
freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/sass/store-data-with-sass-variables.md
Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

2.4 KiB

id, title, challengeType, forumTopicId, dashedName
id title challengeType forumTopicId dashedName
587d7dbd367417b2b2512bb4 用 Sass 变量存储数据 0 301460 store-data-with-sass-variables

--description--

Sass 不同于 CSS 的一个特点是它允许使用变量。我们可以在 Sass 中声明变量,并为它赋值,就像我们在 JavaScript 中一样。

在 JavaScript 中,变量是使用letconst关键字定义的。在 Sass 中,变量以$开头的,后跟变量名。

这里有几个例子:

$main-fonts: Arial, sans-serif;
$headings-color: green;

//To use variables:
h1 {
  font-family: $main-fonts;
  color: $headings-color;
}

当需要把多个元素设置成相同颜色时,变量就会很有用。一旦我们需要更改颜色,只需要改变这个变量的值就好。

--instructions--

创建一个变量$text-color并将其设置为红色。然后更改.blog-posth2color属性的值为$text-color变量。

--hints--

你应该为$text-color声明一个值为红色的 Sass 变量。

assert(code.match(/\$text-color:\s*?red;/g));

你应使用$text-color变量来更改.blog-posth2颜色

assert(code.match(/color:\s*?\$text-color;/g));

.blog-post元素应为红色。

assert($('.blog-post').css('color') == 'rgb(255, 0, 0)');

h2元素应为红色。

assert($('h2').css('color') == 'rgb(255, 0, 0)');

--seed--

--seed-contents--

<style type='text/scss'>


  .header{
    text-align: center;
  }
  .blog-post, h2 {
    color: red;
  }
</style>

<h1 class="header">Learn Sass</h1>
<div class="blog-post">
  <h2>Some random title</h2>
  <p>This is a paragraph with some random text in it</p>
</div>
<div class="blog-post">
  <h2>Header #2</h2>
  <p>Here is some more random text.</p>
</div>
<div class="blog-post">
  <h2>Here is another header</h2>
  <p>Even more random text within a paragraph</p>
</div>

--solutions--

<style type='text/scss'>
  $text-color: red;

  .header{
    text-align: center;
  }
  .blog-post, h2 {
    color: $text-color;
  }
</style>

<h1 class="header">Learn Sass</h1>
<div class="blog-post">
  <h2>Some random title</h2>
  <p>This is a paragraph with some random text in it</p>
</div>
<div class="blog-post">
  <h2>Header #2</h2>
  <p>Here is some more random text.</p>
</div>
<div class="blog-post">
  <h2>Here is another header</h2>
  <p>Even more random text within a paragraph</p>
</div>