I’m using the plugin ngCordova " barcode Scan" to scan QR codes and bar , when I access the device camera away the header and footer of the page.
as I can make out even if the camera can see the header and footer ?
no, you cannot see the header and footer when using camera as the native plugin opens the android camera activity and in that activity it is defined to show full screen.
Even in many native apps you cannot show a header or footer because the camera activity takes focus.