Hi guyz.
I'm kinda new to DS (actually using 1.4), I'm taking back a piece of code I did not developed and I'm stuck with questions in my head 
.
Actually, I have a custom property (let's call it "ajax"), called in my Additional Properties JS file after a user manually enters an URL :
this.firePropertiesChanged(["ajax"]);
this.ajax() { .../*code is executed*/... }
That sends to the Component an url.
The Component received it well through this.ajax and performs an AJAX request to load stuff from outside.
Now, I need to update my Additional Properties "view" after the AJAX request has ended (well or not), and I'm kinda stuck there.
From what I read from the docs, calling at the end of the AJAX request :
this.firePropertiesChanged(["ajax"]); // or any other properties dedicated to that
won't warn the Additional Properties back.
Seems like I can't call this.callRuntimeHandler() right after I fire the property from the Additional Properties because the request might not been over.
How can I achieve this ? I've started to read about ztl file but I miss some concepts out of it, also I think using the script contributor is not what I need.
Any idea/help 
?
EDIT :
I could do a loop that checks for a property x !== null just after the firing. The property x would change its value right after the ajax has ended ? Not so great but that's all I can see now (or a long time out in JS but well 
)