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
1.9 KiB
Markdown
101 lines
1.9 KiB
Markdown
---
|
|
id: 587d78a7367417b2b2512ae0
|
|
title: Use CSS Animation to Change the Hover State of a Button
|
|
challengeType: 0
|
|
videoUrl: 'https://scrimba.com/c/cg4vZAa'
|
|
forumTopicId: 301073
|
|
dashedName: use-css-animation-to-change-the-hover-state-of-a-button
|
|
---
|
|
|
|
# --description--
|
|
|
|
You can use CSS `@keyframes` to change the color of a button in its hover state.
|
|
|
|
Here's an example of changing the width of an image on hover:
|
|
|
|
```html
|
|
<style>
|
|
img:hover {
|
|
animation-name: width;
|
|
animation-duration: 500ms;
|
|
}
|
|
|
|
@keyframes width {
|
|
100% {
|
|
width: 40px;
|
|
}
|
|
}
|
|
</style>
|
|
|
|
<img src="https://bit.ly/smallgooglelogo" alt="Google's Logo" />
|
|
```
|
|
|
|
# --instructions--
|
|
|
|
Note that `ms` stands for milliseconds, where 1000ms is equal to 1s.
|
|
|
|
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%`.
|
|
|
|
# --hints--
|
|
|
|
The @keyframes rule should use the `animation-name` background-color.
|
|
|
|
```js
|
|
assert(code.match(/@keyframes\s+?background-color\s*?{/g));
|
|
```
|
|
|
|
There should be one rule under `@keyframes` that changes the `background-color` to `#4791d0` at 100%.
|
|
|
|
```js
|
|
assert(code.match(/100%\s*?{\s*?background-color:\s*?#4791d0;\s*?}/gi));
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --seed-contents--
|
|
|
|
```html
|
|
<style>
|
|
button {
|
|
border-radius: 5px;
|
|
color: white;
|
|
background-color: #0F5897;
|
|
padding: 5px 10px 8px 10px;
|
|
}
|
|
|
|
button:hover {
|
|
animation-name: background-color;
|
|
animation-duration: 500ms;
|
|
}
|
|
|
|
|
|
</style>
|
|
|
|
<button>Register</button>
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```html
|
|
<style>
|
|
button {
|
|
border-radius: 5px;
|
|
color: white;
|
|
background-color: #0F5897;
|
|
padding: 5px 10px 8px 10px;
|
|
}
|
|
|
|
button:hover {
|
|
animation-name: background-color;
|
|
animation-duration: 500ms;
|
|
}
|
|
|
|
@keyframes background-color {
|
|
100% {
|
|
background-color: #4791d0;
|
|
}
|
|
}
|
|
</style>
|
|
<button>Register</button>
|
|
```
|