How do I exit full screen on NW.js?

The game is exported with following settings

Kiosk mode - yes

Resizable window - yes

Window frame - no

I have request full screen on start of layout, it switched to full screen successfully.

Also assigned on Escape keypress to cancel full screen mode

However it has no effect when key press, how do I do it properly? Thanks.

That's because you have Kiosk mode turned on. You need to Kiosk mode turned OFF to exit full screen.

Kiosk mode is meant for a public event (like a booth at PAX), so strangers don't exit the game and mess with your PC.