function HandleResponseFromUE4(jsonObj) {
  //process whatever u want to do with your object
{ Process the JSON object sent by the Unreal app to the webpage
  console.log(jsonObj);

   if if(window.e3ds.events[jsonObj.cmd]) {
    window.e3ds.events[jsonObj.cmd](jsonObj);
  }
}


//eagle3dstreaming's Server  
to
Iframe
communication
const eventHandler = (event) => {
  console.log('Message From SS -- > Iframe  ', event.data);
// This function will receive all kinds of events the webpage receives
  
  // Check if event.data.type exists to identify if it was sent by the Unreal app
  if (!event.data.type) {
    // is itIf event.data includes a field named cmd, then this data is notcoming from serverthe Unreal app.
{     console.log('Message From UE4-- > Iframe  :', event.data);// If your Unreal app uses a different field name, replace this field name with the one you have used in your Unreal app
    if (typeof event.data === 'string' && event.data.includes('cmd')) {
      // We are sending data as a string. Now we try to parse it to check
      // if this string represents a JSON or not.
      // If you are sending a normal string from the Unreal app, then this is not needed 

      const parsedData = JSON.parse(event.data);
      if (parsedData.cmd) { //than It is itJSON aobject data sent from ue4UE4
???         HandleResponseFromUE4(parsedData); //process Process the data sent by ue4UE4
      }
    }
  }
}
// We  }
}

are binding eventHandler to receive all kinds of messages the webpage receives
window.addEventListener("message", eventHandler);