Key event key not recognized

Question

The key returned by event. key is always unidentified. Only enter key is identified. This happens on codeplayground.
https://code.sololearn.com/W9xLWlbj6F35/?ref=app

Answer 1

There is a mistake in line 3.
Change from key to keyCode

Answer 2

I have tried with all possible combinations keycode, charCode, which, key, on my android phone
It never gives the correct answer.

Answer 3

Just make the "keycode" camel type forma. Change it from "keycode" to "keyCode" so it would work. Remember, JavaScript is case sensitive.

Answer 4

Changed keycode to keyCode. Now it recognizes enter key and sometimes backspace key. It returns 229 for all the other keys(alphabets and numbers)

Answer 5

I see it works with Input type =number what's the problem with input type = text