版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/app-loading/0.0.51/app-loading.css
- https://cdn.bootcdn.net/ajax/libs/app-loading/0.0.51/app-loading.js
- https://cdn.bootcdn.net/ajax/libs/app-loading/0.0.51/app-loading.min.css
- https://cdn.bootcdn.net/ajax/libs/app-loading/0.0.51/app-loading.min.js
- https://cdn.bootcdn.net/ajax/libs/app-loading/0.0.51/app-loading.min.js.map