* 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>
2.4 KiB
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let
和const
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-post
和h2
的color
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$text-color
变量来更改.blog-post
和h2
的颜色
。
assert(code.match(/color:\s*?\$text-color;/g));
.blog-post
元素应为红色。
assert($('.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>