版本：0.2.1
- https://cdn.bootcdn.net/ajax/libs/loadCSS/0.2.1/loadCSS.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/0.2.1/loadCSS.min.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/0.2.1/onloadCSS.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/0.2.1/onloadCSS.min.js