YellowJS is a framework for mobile web App and hybrid App. still in beta for the moment.
Once you have clone or download this repository, run the 'compile' executable script, the result files will be placed in the build folder.
You'll find in the demos folder a "demo-ui" app, that could help you start with YellowJS, if you have any question or bug feel free to report it (via github, or via the mailling list).