版本：2.0.0-alpha.19
- https://cdn.bootcdn.net/ajax/libs/better-scroll/2.0.0-alpha.19/better-scroll.esm.js
- https://cdn.bootcdn.net/ajax/libs/better-scroll/2.0.0-alpha.19/better-scroll.esm.min.js
- https://cdn.bootcdn.net/ajax/libs/better-scroll/2.0.0-alpha.19/better-scroll.js
- https://cdn.bootcdn.net/ajax/libs/better-scroll/2.0.0-alpha.19/better-scroll.min.js