2018-10-10 18:03:03 -04:00
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---
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id: 5a9d725e424fe3d0e10cad10
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challengeType: 0
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2019-12-13 13:47:57 +08:00
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videoUrl: 'https://scrimba.com/c/c6bDECm'
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forumTopicId: 301093
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2020-10-01 17:54:21 +02:00
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title: 使用 CSS 变量一次更改多个元素
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2018-10-10 18:03:03 -04:00
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---
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## Description
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2019-12-13 13:47:57 +08:00
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<section id='description'>
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<dfn>CSS 变量</dfn>是一种仅更改一个值,来一次性更改多个 CSS 样式属性的强大方法。
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按照下面指示的来做,我们只需要改变三个值,多个样式将会同时被修改。
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</section>
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2018-10-10 18:03:03 -04:00
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## Instructions
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<section id='instructions'>
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在<code>penguin</code>class 里,将<code>black</code>改为<code>gray</code>,<code>gray</code>改为<code>white</code>,<code>yellow</code>改为<code>orange</code>。
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</section>
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2018-10-10 18:03:03 -04:00
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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</code> class 声明的<code>--penguin-skin</code>变量的值应为<code>gray</code>。'
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testString: assert(code.match(/.penguin\s*?{[\s\S]*--penguin-skin\s*?:\s*?gray\s*?;[\s\S]*}/gi));
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- text: '<code>penguin</code> class 声明的<code>--penguin-belly</code>变量的值应为<code>white</code>。'
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testString: assert(code.match(/.penguin\s*?{[\s\S]*--penguin-belly\s*?:\s*?white\s*?;[\s\S]*}/gi));
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- text: '<code>penguin</code> class 声明的<code>--penguin-beak</code>变量的值应为<code>orange</code>。'
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testString: assert(code.match(/.penguin\s*?{[\s\S]*--penguin-beak\s*?:\s*?orange\s*?;[\s\S]*}/gi));
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2018-10-10 18:03:03 -04:00
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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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/* change code below */
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--penguin-skin: black;
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--penguin-belly: gray;
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--penguin-beak: yellow;
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/* change code above */
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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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background: var(--penguin-skin, gray);
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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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background: var(--penguin-skin, gray);
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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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background: var(--penguin-skin, gray);
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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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background: var(--penguin-skin, gray);
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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: var(--penguin-belly, 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: var(--penguin-belly, 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: var(--penguin-belly, 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: var(--penguin-beak, 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: var(--penguin-beak, 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: var(--penguin-beak, 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: var(--penguin-beak, 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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2019-12-13 13:47:57 +08:00
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2018-10-10 18:03:03 -04:00
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```js
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// solution required
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```
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2019-12-13 13:47:57 +08:00
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2018-10-10 18:03:03 -04:00
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</section>
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2019-12-13 13:47:57 +08:00
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