Scripting - EventListener on changing of ActiveDocument

I would like to update the content of this damn EditText upon the opening/ change of documents.

I've tried things like ActiveDocument.addEventListener("onChange", … with no avail.
And I've found this page on the forum that doesn't give me much hope… but it's 7yo so maybe…

Where is there a list of InDesign Event types? 

Hi @Fred.L , The listeners Marc is referring to in your link are specific to the scriptUI object. InDesign has listeners that can be attached to objects. For example here is a list of document events:

https://www.indesignjs.de/extendscriptAPI/indesign-latest/#Event.html#d1e34342

So you could listen for an export to complete and get the document’s name like this:

#targetengine "session"

var el = app.eventListeners.add("afterExport", exportDone);

/**
* Function to run after an Export
* @ param the event 
*/
function exportDone(e){
    alert(e.parent.name + " has been Exported")
}

Here's something that might work, but I have some serious doubts about the practicality. If you're willing to be the guinea pig...

#target InDesign
#targetengine session

app.addEventListener("afterOpen", aoFunction);

function aoFunction(evt) {
	alert(app.activeDocument.name);
	if (evt.target.constructor.name==="LayoutWindow") {
		app.activeWindow.addEventListener("afterSelectionChanged",ascFunction);
	} 
}

function ascFunction(evt){
	if (evt.target.constructor.name==="LayoutWindow") {
	alert(app.activeDocument.name);
	}
}

The first function is pretty straightforward: When a new LayoutWindow is .open, it displays the document name. But it also attaches an afterSelectionChanged event listener to that LayoutWIndow, which also displays the active document name.

So when you open document 1, you see the name. (Instead of using alert(), you can figure out how to display this name in your script window). When you open document 2, you get its name. If you've left document 1 open and click on that tab, you see the document 1 name again. That's the afterSelectionChanged handler in action.

My reservation is this: The afterSelectionChanged handler is going to fire every time the user clicks the mouse. Or types into a text frame. It doesn't take long for the script to figure out whether the target is a LayoutWindow, but I wouldn't be shocked to hear that InDesign seems to get bogged down with this script running.
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I haved some scripts that dynamically update when the user switches from one open document to another, but they are attached to ScriptUI dropdown menus. The trick there is that the update is done by a function attached to the .onChange method of a popup menu.

What is your end goal?