I can see the e.keyCode but not e.letter ? why?

I want to show the kids that each character has it own number
so I made this zapp

but how to show the e.letter ?

the way it is possible in https://www.toptal.com/developers/keycode

so now I get undefined, why?

all characters are undifened in the console

thanks to help

Hi @karelrosseel82 - keyCode has been deprecated so no longer recommended to use. Use e.key instead. As far as I know.