274 lines
5.6 KiB
Markdown
274 lines
5.6 KiB
Markdown
---
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id: 5a9d727a424fe3d0e10cad12
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cM989ck'
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forumTopicId: 301090
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title: 使用一个自定义的 CSS 变量
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---
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## Description
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<section id='description'>
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创建变量后，CSS 属性可以通过引用变量名来使用它的值。
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```css
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background: var(--penguin-skin);
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```
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因为引用了<code>--penguin-skin</code>变量的值，使用了这个样式的元素背景颜色会是灰色。
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注意：如果变量名不匹配，样式不会生效。
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</section>
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## Instructions
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<section id='instructions'>
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<code>penguin-top</code>，<code>penguin-bottom</code>，<code>right-hand</code>和<code>left-hand</code>class 的<code>background</code>属性均使用<code>--penguin-skin</code>变量值。
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: '<code>penguin-top</code> class 的<code>background</code>属性应使用<code>--penguin-skin</code>变量值。'
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testString: assert(code.match(/.penguin-top\s*?{[\s\S]*background\s*?:\s*?var\s*?\(\s*?--penguin-skin\s*?\)\s*?;[\s\S]*}[\s\S]*.penguin-bottom\s{/gi));
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- text: '<code>penguin-bottom</code> class 的<code>background</code>属性应使用<code>--penguin-skin</code>变量值。'
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testString: assert(code.match(/.penguin-bottom\s*?{[\s\S]*background\s*?:\s*?var\s*?\(\s*?--penguin-skin\s*?\)\s*?;[\s\S]*}[\s\S]*.right-hand\s{/gi));
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- text: '<code>right-hand</code> class 的<code>background</code>属性应使用<code>--penguin-skin</code>变量值。'
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testString: assert(code.match(/.right-hand\s*?{[\s\S]*background\s*?:\s*?var\s*?\(\s*?--penguin-skin\s*?\)\s*?;[\s\S]*}[\s\S]*.left-hand\s{/gi));
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- text: '<code>left-hand</code> class 的<code>background</code>属性应使用<code>--penguin-skin</code>变量值。'
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testString: assert(code.match(/.left-hand\s*?{[\s\S]*background\s*?:\s*?var\s*?\(\s*?--penguin-skin\s*?\)\s*?;[\s\S]*}/gi));
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<style>
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.penguin {
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--penguin-skin: gray;
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position: relative;
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margin: auto;
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display: block;
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margin-top: 5%;
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width: 300px;
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height: 300px;
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}
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.penguin-top {
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top: 10%;
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left: 25%;
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/* change code below */
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background: black;
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/* change code above */
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width: 50%;
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height: 45%;
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border-radius: 70% 70% 60% 60%;
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}
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.penguin-bottom {
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top: 40%;
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left: 23.5%;
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/* change code below */
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background: black;
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/* change code above */
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width: 53%;
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height: 45%;
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border-radius: 70% 70% 100% 100%;
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}
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.right-hand {
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top: 0%;
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left: -5%;
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/* change code below */
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background: black;
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/* change code above */
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width: 30%;
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height: 60%;
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border-radius: 30% 30% 120% 30%;
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transform: rotate(45deg);
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z-index: -1;
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}
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.left-hand {
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top: 0%;
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left: 75%;
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/* change code below */
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background: black;
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/* change code above */
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width: 30%;
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height: 60%;
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border-radius: 30% 30% 30% 120%;
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transform: rotate(-45deg);
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z-index: -1;
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}
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.right-cheek {
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top: 15%;
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left: 35%;
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background: white;
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width: 60%;
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height: 70%;
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border-radius: 70% 70% 60% 60%;
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}
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.left-cheek {
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top: 15%;
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left: 5%;
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background: white;
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width: 60%;
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height: 70%;
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border-radius: 70% 70% 60% 60%;
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}
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.belly {
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top: 60%;
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left: 2.5%;
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background: white;
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width: 95%;
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height: 100%;
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border-radius: 120% 120% 100% 100%;
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}
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.right-feet {
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top: 85%;
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left: 60%;
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background: orange;
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width: 15%;
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height: 30%;
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border-radius: 50% 50% 50% 50%;
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transform: rotate(-80deg);
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z-index: -2222;
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}
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.left-feet {
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top: 85%;
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left: 25%;
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background: orange;
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width: 15%;
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height: 30%;
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border-radius: 50% 50% 50% 50%;
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transform: rotate(80deg);
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z-index: -2222;
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}
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.right-eye {
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top: 45%;
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left: 60%;
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background: black;
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width: 15%;
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height: 17%;
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border-radius: 50%;
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}
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.left-eye {
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top: 45%;
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left: 25%;
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background: black;
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width: 15%;
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height: 17%;
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border-radius: 50%;
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}
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.sparkle {
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top: 25%;
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left: 15%;
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background: white;
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width: 35%;
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height: 35%;
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border-radius: 50%;
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}
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.blush-right {
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top: 65%;
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left: 15%;
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background: pink;
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width: 15%;
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height: 10%;
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border-radius: 50%;
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}
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.blush-left {
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top: 65%;
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left: 70%;
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background: pink;
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width: 15%;
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height: 10%;
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border-radius: 50%;
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}
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.beak-top {
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top: 60%;
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left: 40%;
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background: orange;
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width: 20%;
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height: 10%;
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border-radius: 50%;
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}
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.beak-bottom {
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top: 65%;
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left: 42%;
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background: orange;
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width: 16%;
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height: 10%;
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border-radius: 50%;
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}
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body {
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background:#c6faf1;
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}
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.penguin * {
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position: absolute;
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}
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</style>
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<div class="penguin">
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<div class="penguin-bottom">
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<div class="right-hand"></div>
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<div class="left-hand"></div>
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<div class="right-feet"></div>
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<div class="left-feet"></div>
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</div>
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<div class="penguin-top">
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<div class="right-cheek"></div>
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<div class="left-cheek"></div>
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<div class="belly"></div>
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<div class="right-eye">
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<div class="sparkle"></div>
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</div>
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<div class="left-eye">
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<div class="sparkle"></div>
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</div>
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<div class="blush-right"></div>
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<div class="blush-left"></div>
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<div class="beak-top"></div>
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<div class="beak-bottom"></div>
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</div>
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</div>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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