Hi @vibra, I am afraid that we do not currently have an official Javascript Bindings for use with the Tobii 4C or EyeX Eye Tracker.
A number of other users have experimented with creating their own bindings online such as @ https://github.com/coylz/TobiiStreamEngineForJava
Please bear in mind these and not official bindings so we cannot support their application, but certainly, we would
welcome your feedback in using these 3rd party tools.