Listen to keypress in HTML/JavaScript on iOS/Safari with Bluetooth Scanner/Keyboard without having to focus a field

Question

I have the following setup:

• iPad with Safari browser running a webb-application.
• Bluetooth barcode-scanner connected/paired with the iPad.

Answer 1

I believe that with mobile Safari (and most other iOS mobile browsers), keypresses are only detectable by the web app when a form input is infocus. Your device (without an external keyboard) can't take keypress input without a form input being selected simply because the keyboard would not be up.