As you may recall, Peter was able to create JS version of DataGrid and BarChart by writing the AS version and cross-compiling it to JS.
I just checked in a new swc called FlexJSJX and changes to the build scripts so those components and others can have their AS classes in that project and their JS versions will be cross-compiled via the FalconJX version of COMPC. So, if you are building out a new component for FlexJS, if the JS version can be completely auto-generated by FalconJX, add the component to FlexJSJX, otherwise add the AS code to FlexJSUI.swc and your manually-written JS code to the frameworks/js/FlexJS folder. Thanks, -Alex