68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
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---
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id: 587d78a7367417b2b2512ae0
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title: Use CSS Animation to Change the Hover State of a Button
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challengeType: 0
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videoUrl: ''
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localeTitle: 使用CSS动画更改按钮的悬停状态
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---
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## Description
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<section id="description">您可以使用CSS <code>@keyframes</code>更改悬停状态下按钮的颜色。以下是在悬停时更改图像宽度的示例： <blockquote> <风格> <br> img：hover { <br>动画名称：宽度; <br>动画持续时间：500ms; <br> } <br><br> @keyframes width { <br> 100％{ <br>宽度：40px; <br> } <br> } <br> </样式> <br><br> <img src =“https://bit.ly/smallgooglelogo"alt =”Google的徽标“/> </blockquote></section>
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## Instructions
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<section id="instructions">请注意， <code>ms</code>表示毫秒，其中1000毫秒等于1秒。使用CSS <code>@keyframes</code>更改<code>button</code>元素的<code>background-color</code> ，以便当用户将鼠标悬停在其上时变为<code>#4791d0</code> 。 <code>@keyframes</code>规则应该只有<code>100%</code>的条目。 </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: '@keyframes规则应使用<code>animation-name</code> background-color。'
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testString: 'assert(code.match(/@keyframes\s+?background-color\s*?{/g), "The @keyframes rule should use the <code>animation-name</code> background-color.");'
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- text: '<code>@keyframes</code>下应该有一条规则将<code>background-color</code>更改为<code>#4791d0</code>为100％。'
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testString: 'assert(code.match(/100%\s*?{\s*?background-color:\s*?#4791d0;\s*?}/gi), "There should be one rule under <code>@keyframes</code> that changes the <code>background-color</code> to <code>#4791d0</code> at 100%.");'
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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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button {
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border-radius: 5px;
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color: white;
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background-color: #0F5897;
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padding: 5px 10px 8px 10px;
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}
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button:hover {
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animation-name: background-color;
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animation-duration: 500ms;
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}
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</style>
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<button>Register</button>
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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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