Following this Stack Overflow answer do the following to debug JavaScript in your UWP web views.
- Insert the
debugger;keyword in your JavaScript code. - Launch the app without debugging, using CTRL+F5 (Visual Studio cannot launch two debuggers at once, so if you are already debugging the C# code you are out of luck.)
- Execute the application until you need to debug JavaScript code.
- In Visual Studio, select “Debug / Attach to Process…” and select the application (in this case,
flypad-windows.exe) and select “Script code” in the “Attach to” section of the dialog. - You can re-attach to the process later on using the “Debug / Reattach to Process” menu entry, which will reuse the previous settings.