93 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			93 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
 | |
| id: 58a7a6ebf9a6318348e2d5aa
 | |
| title: 修改动画的填充模式
 | |
| challengeType: 0
 | |
| videoUrl: 'https://scrimba.com/c/cVJDmcE'
 | |
| forumTopicId: 301064
 | |
| dashedName: modify-fill-mode-of-an-animation
 | |
| ---
 | |
| 
 | |
| # --description--
 | |
| 
 | |
| 太棒了,但是现在还不完美。 注意动画在 `500ms` 之后重置了,所以按钮又变成了之前的颜色。 而我们想要的效果是按钮在悬停时始终高亮。
 | |
| 
 | |
| 为此,我们可以通过把 `animation-fill-mode` 设置成 `forwards` 来实现。 `animation-fill-mode` 指定了在动画结束时元素的样式: 你可以这样设置:
 | |
| 
 | |
| ```css
 | |
| animation-fill-mode: forwards;
 | |
| ```
 | |
| 
 | |
| # --instructions--
 | |
| 
 | |
| 设置 `button:hover` 的 `animation-fill-mode` 属性为 `forwards`,使用户把鼠标悬停在按钮上时,按钮保持高亮。
 | |
| 
 | |
| # --hints--
 | |
| 
 | |
| `button:hover` 应有一个值为 `forwards` 的 `animation-fill-mode` 属性。
 | |
| 
 | |
| ```js
 | |
| assert(
 | |
|   code.match(
 | |
|     /button\s*?:\s*?hover\s*?{[\s\S]*animation-fill-mode\s*?:\s*?forwards\s*?;[\s\S]*}/gi
 | |
|   ) &&
 | |
|     code.match(
 | |
|       /button\s*?:\s*?hover\s*?{[\s\S]*animation-name\s*?:\s*?background-color\s*?;[\s\S]*}/gi
 | |
|     ) &&
 | |
|     code.match(
 | |
|       /button\s*?:\s*?hover\s*?{[\s\S]*animation-duration\s*?:\s*?500ms\s*?;[\s\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;
 | |
|     /* Only change code below this line */
 | |
| 
 | |
|     /* Only change code above this line */
 | |
|   }
 | |
|   @keyframes background-color {
 | |
|     100% {
 | |
|       background-color: #4791d0;
 | |
|     }
 | |
|   }
 | |
| </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;
 | |
|     animation-fill-mode: forwards;
 | |
|   }
 | |
|   @keyframes background-color {
 | |
|     100% {
 | |
|       background-color: #4791d0;
 | |
|     }
 | |
|   }
 | |
| </style>
 | |
| <button>Register</button>
 | |
| ```
 |