Hello!
I have one problem\question about js version and bindings-generator. Can it bind all cpp code into js for use in web, or it need just for call cpp methods from js?
What anyone tell about “Getting your C++ to the Web with Node.js”? Will be it work with cocos?
the bindings jsb is only for native builds (android, ios, etc) that use cpp.
About your other question I don’t know 
Hi, your question is not quite clear. Can you make it somewhat clear?
So, cpp works only in native platforms?
see this and you’ll know…
http://www.cocos2d-x.org/wiki/Getting_Started_Cocos2d-JS