mmm
when I type in my desktop your demo works Ok.
But, in my celular (htc sense with firefox beta, with hardware keyboard) I have to type FN + number.
When I type '12345' the caret moves to the begining of the '5', so when I type '6' the result is '1234 65'
Comment
At least it works on iOS Safari. I just tested that.
Parent comment
mmm when I type in my desktop your demo works Ok. But, in my celular (htc sense with firefox beta, with hardware keyboard) I have to type FN + number. When I type '12345' the caret moves to the begining of the '5', so when I type '6' the result is '1234 65'