104 lines
1.9 KiB
Markdown
104 lines
1.9 KiB
Markdown
---
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id: 587d78a7367417b2b2512ae0
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title: 使用CSS動畫更改按鈕的懸停狀態
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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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你可以在按鈕懸停時使用 `@keyframes` 改變按鈕的顏色。
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下面是在圖片懸停時改變圖片寬度的例子：
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```html
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<style>
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img {
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width: 30px;
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}
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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://cdn.freecodecamp.org/curriculum/applied-visual-design/google-logo.png" 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 等於 1s。
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使用 `@keyframes` 來改變 `button` 元素的 `background-color`，使其在懸停時變成 `#4791d0`。 `@keyframes` 規則應該只有一個 `100%` 條目。
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# --hints--
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@keyframes 規則的 `animation-name` 應該是 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` 爲 100% 的位置，應將 `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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