It seems they are “olders” method that did work but right now it’s not working for me.
I’m still stuck with the original resolution comming from unreal by default.
// note: default is 800x600
// and is configurable via DefaultEngine.ini [SystemSettings] r.setRes=WidthxHeight
var width = UE_JSlib.UE_GSystemResolution_ResX();
var height = UE_JSlib.UE_GSystemResolution_ResY();
So I also tried to change all the width and height I could find in the html.
Also tried to edit the JSlib file with notepad. and can’t make it work.