版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery-expandable/1.1.4/jquery.expandable.js
- https://cdn.bootcdn.net/ajax/libs/jquery-expandable/1.1.4/jquery.expandable.min.js
- https://cdn.bootcdn.net/ajax/libs/jquery-expandable/1.1.4/jquery.expandable.min.js.map