The Language being used in Power Apps is weak weird and obtuse and has no debugger, further to that code is copied all over the interface behind different screens buttons and controls. This is an Anti Pattern of Good software Development and makes it difficult to Support and Develop. Hence higher maintenance costs. No Code, Configure only is good. Any sort of code without a Debugger easily available error logger for failures is a a problem this does not represent productivity for us as consultants or the extra man hours consumed that the clients or customers have to pay for. Power Apps could be so much better than it is.
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Custom Pages - JS NavigateTo parameters