版本：16.0.0-beta.4
- https://cdn.bootcdn.net/ajax/libs/react/16.0.0-beta.4/c/react.development.
- https://cdn.bootcdn.net/ajax/libs/react/16.0.0-beta.4/c/react.production.min.
- https://cdn.bootcdn.net/ajax/libs/react/16.0.0-beta.4/umd/react.development.
- https://cdn.bootcdn.net/ajax/libs/react/16.0.0-beta.4/umd/react.production.min.