js polyfill , to developing the cross browser js

https://github.com/paulmillr/console-polyfill

https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills

http://addyosmani.com/blog/writing-polyfills/

https://github.com/es-shims/es5-shim  ****

https://github.com/rackt/react-redux