版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/multi.js/0.5.3/multi-es6.min.js
- https://cdn.bootcdn.net/ajax/libs/multi.js/0.5.3/multi.css
- https://cdn.bootcdn.net/ajax/libs/multi.js/0.5.3/multi.js
- https://cdn.bootcdn.net/ajax/libs/multi.js/0.5.3/multi.min.css
- https://cdn.bootcdn.net/ajax/libs/multi.js/0.5.3/multi.min.js