版本：2.0.0-1
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/cssrelpreload.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/cssrelpreload.min.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/loadCSS.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/loadCSS.min.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/onloadCSS.js
- https://cdn.bootcdn.net/ajax/libs/loadCSS/2.0.0-1/onloadCSS.min.js