JavaScript Unity 3D WebGL: Run Javascript code after the app has been loaded and is ready unity webgl javascript callback,unity webgl javascript communication,unity webgl

How can I check or receive a message when the a Unity WebGL app is finished with loading and ready for use? What I want is to run a JavaScript function of my Webinterface after the WebGL App is ready.

Answer:1

I've found a solution that works for me. There is a JavaScript file UnityProgress.js in the Build folder of your WebGL build. Inside you can find a variable progresswhich will be set to 1.0 after the loading / downloading progress is finished. You can place your code after that if-statement at the bottom to run your JavaScript code (Don't forget the brackets^^). But there is some initialization time that the Unity App needs to start. So you probably have to set a delay time. For me 2500ms worked well.

 function UnityProgress(gameInstance, progress) {
    ...

    if (progress == 1.0) {
      gameInstance.logo.style.display = gameInstance.progress.style.display = "none";

      // call of my function:

      console.log("#### WebGL is ready now ####");
      setTimeout(function() {
        myFunction();
      }, 2500);

    }
}
Answer:2

I use a different approach. This is especially helpful because you can define callbacks in whatever part of your Unity code you wish i.e. you can react to async events.

//in your html|js
function OnAppReady(){
    console.log("### application is loaded")
}

//in Unity
void Start()
{
    //js callback when application is loaded
    Application.ExternalEval("OnAppReady()");
}
Answer:3

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