77 lines
1.6 KiB
Markdown
77 lines
1.6 KiB
Markdown
---
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id: 587d78a7367417b2b2512ae2
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title: Create Visual Direction by Fading an Element from Left to Right
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challengeType: 0
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videoUrl: ''
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localeTitle: 通过从左到右淡化元素来创建视觉方向
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---
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## Description
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<section id="description">对于此挑战，您将更改动画元素的<code>opacity</code> ，使其在到达屏幕右侧时逐渐变淡。在显示的动画中，具有渐变背景的圆形元素按照<code>@keyframes</code>规则向右移动动画的50％标记。 </section>
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## Instructions
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<section id="instructions">使用id为<code>ball</code>定位元素，并将<code>opacity</code>属性设置为0.1（ <code>50%</code> ，因此元素向右移动时会逐渐消失。 </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: fade的<code>keyframes</code>规则应将<code>opacity</code>属性设置为0.1为50％。
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testString: 'assert(code.match(/@keyframes fade\s*?{\s*?50%\s*?{\s*?(?:left:\s*?60%;\s*?opacity:\s*?0?\.1;|opacity:\s*?0?\.1;\s*?left:\s*?60%;)/gi), "The <code>keyframes</code> rule for fade should set the <code>opacity</code> property to 0.1 at 50%.");'
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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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#ball {
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width: 70px;
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height: 70px;
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margin: 50px auto;
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position: fixed;
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left: 20%;
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border-radius: 50%;
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background: linear-gradient(
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35deg,
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#ccffff,
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#ffcccc
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);
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animation-name: fade;
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animation-duration: 3s;
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}
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@keyframes fade {
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50% {
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left: 60%;
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}
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}
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</style>
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<div id="ball"></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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