版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/loaders.css/0.1.2/loaders.css
- https://cdn.bootcdn.net/ajax/libs/loaders.css/0.1.2/loaders.css.js
- https://cdn.bootcdn.net/ajax/libs/loaders.css/0.1.2/loaders.css.min.js
- https://cdn.bootcdn.net/ajax/libs/loaders.css/0.1.2/loaders.min.css