Part of the Input API. It is used to identify the name of a specific user input key.
"leftArrow"
| "rightArrow"
| "upArrow"
| "downArrow"
| "spacebar"
| "enter"
| "backspace"
| "minus"
| "plus"
| "tab"
| "escape"
| "f1"
| "f2"
| "f3"
| "f4"
| "f5"
| "f6"
| "f7"
| "f8"
| "f9"
| "f10"
| "f11"
| "f12"
| "0"
| "1"
| "2"
| "3"
| "4"
| "5"
| "6"
| "7"
| "8"
| "9"
| "a"
| "b"
| "c"
| "d"
| "e"
| "f"
| "g"
| "h"
| "i"
| "j"
| "k"
| "l"
| "m"
| "n"
| "o"
| "p"
| "q"
| "r"
| "s"
| "t"
| "u"
| "v"
| "w"
| "x"
| "y"
| "z"