How to prohibit code execution before downloading?

[Lawrence3DPK]

Is creating your own custom events an option?

const event = new Event('myevent');

//Wait till a function finishes then... 

window.dispatchEvent(event)

//detect the event... 

window.addEventListener('myevent',function(){
//do stuff
}

Or maybe loading manager can be of use to you?

How to export GLTF Object for use in other functions?

Have a look at loading manager, using this you can load all models and run animate/update when loading is finished, then to access a model at any point after this you can do var model = scene.getObjectByName(“objectName”)