ee1e8abd87
* 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>
101 lines
1.8 KiB
Markdown
101 lines
1.8 KiB
Markdown
---
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id: 587d78a7367417b2b2512ae0
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title: 使用CSS动画更改按钮的悬停状态
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cg4vZAa'
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forumTopicId: 301073
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dashedName: use-css-animation-to-change-the-hover-state-of-a-button
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---
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# --description--
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你可以在按钮悬停时使用 `@keyframes` 改变按钮的颜色。
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下面是在图片悬停时改变图片宽度的例子：
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```html
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<style>
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img:hover {
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animation-name: width;
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animation-duration: 500ms;
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}
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@keyframes width {
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100% {
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width: 40px;
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}
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}
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</style>
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<img src="https://bit.ly/smallgooglelogo" alt="Google's Logo" />
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```
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# --instructions--
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注意 `ms` 代表毫秒，1000ms 等于 1s。
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使用 `@keyframes` 来改变 `button` 元素的 `background-color`，使其在悬停时变成 `#4791d0`。`@keyframes` 规则应该只有一个 `100%` 条目。
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# --hints--
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`@keyframes` 规则的 `animation-name` 应该是 background-color。
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```js
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assert(code.match(/@keyframes\s+?background-color\s*?{/g));
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```
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在 `@keyframes` 为 `100%` 的位置，应将 `background-color` 改成 `#4791d0`。
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```js
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assert(code.match(/100%\s*?{\s*?background-color:\s*?#4791d0;\s*?}/gi));
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```
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# --seed--
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## --seed-contents--
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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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# --solutions--
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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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@keyframes background-color {
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100% {
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background-color: #4791d0;
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}
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}
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</style>
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<button>Register</button>
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```
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