I got warning in Firefox console:
and when I click XData.Web.Client.pas
Not sure what is causing this. We'll need to take this up with the pas2js team. It seems a harmless warning though.
I typically see several of these same warnings in each project. I've been ignoring them. Let me know if you want more details.
Yes, the warnings disappear in Release mode compilations. They are merely an annoyance, IMO.