Experimental - test ES2015 version of React as a way to reduce the bundle size.
Requirement:
- must have same feature set.
- minimum target es2015 version.
- CDN available. UMD is not required.
Possible options:
- transpile from ES5 to ES2015 with e.g. https://github.com/lebab/lebab/
- remove UMD and use VAR
- remove custom polyfills such as object-assign.
- move license info to a separate file.
- use the React source code, refactor to ES2015 and compile to ES2015.