ReactController.cs - the file from Unity that is interacting with React
UnityApp.jsx - the component that holds the Unity Game and functions that Unity can access.
test project build folder - https://drive.google.com/file/d/17ujw1VYXkci23Zc5INA87LaDzG67DSGd/view?usp=sharing
Unity build that has 'Send to React' button which sends dummy player data to the React app: Build.zip in repo files
Unity script calls UnityEngine.Application.ExternalCall("receiveDataFromUnity", jsonData);