104 lines
2.0 KiB
Markdown
104 lines
2.0 KiB
Markdown
---
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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: '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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You can use CSS `@keyframes` to change the color of a button in its hover state.
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Here's an example of changing the width of an image on hover:
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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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Note that `ms` stands for milliseconds, where 1000ms is equal to 1s.
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Use CSS `@keyframes` to change the `background-color` of the `button` element so it becomes `#4791d0` when a user hovers over it. The `@keyframes` rule should only have an entry for `100%`.
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# --hints--
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The @keyframes rule should use the `animation-name` 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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There should be one rule under `@keyframes` that changes the `background-color` to `#4791d0` at 100%.
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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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