Hi @kingpirux, I am afraid that for the time being, whilst our official Gaze SDK comes in the following flavours: .NET, C/C++, Unity for the time being, we do not have a javascript plugin available.
We have not been able to prioritize Java support for a while. If you want to start working with Java we recommend to use JNI or Swig to create your own binding towards the C API. Also there is the following project at Github @ https://github.com/designandsystems/tobiiEyeXGetGazePosition
Which may help you get started. Best of luck.