JavaScript KEY_CODE constant KeyCode key code

key.code.js

const KEY_CODE = {
    "BACKSPACE": 8,
    "TAB": 9,
    "ENTER": 13,
    "SHIFT": 16,
    "CTRL": 17,
    "ALT": 18,
    "PAUSE": 19,
    "CAPS_LOCK": 20,
    "ESCAPE": 27,
    "SPACE": 32,
    "PAGE_UP": 33,
    "PAGE_DOWN": 34,
    "END": 35,
    "HOME": 36,
    "LEFT": 37,
    "UP": 38,
    "RIGHT": 39,
    "DOWN": 40,
    "INSERT": 45,
    "DELETE": 46,
    "_0": 48,
    "_1": 49,
    "_2": 50,
    "_3": 51,
    "_4": 52,
    "_5": 53,
    "_6": 54,
    "_7": 55,
    "_8": 56,
    "_9": 57,
    "A": 65,
    "B": 66,
    "C": 67,
    "D": 68,
    "E": 69,
    "F": 70,
    "G": 71,
    "H": 72,
    "I": 73,
    "J": 74,
    "K": 75,
    "L": 76,
    "M": 77,
    "N": 78,
    "O": 79,
    "P": 80,
    "Q": 81,
    "R": 82,
    "S": 83,
    "T": 84,
    "U": 85,
    "V": 86,
    "W": 87,
    "X": 88,
    "Y": 89,
    "Z": 90,
    "MULTIPLY": 106,
    "ADD": 107,
    "SUBTRACT": 109,
    "DECIMAL_POINT": 110,
    "DIVIDE": 111,
    "F1": 112,
    "F2": 113,
    "F3": 114,
    "F4": 115,
    "F5": 116,
    "F6": 117,
    "F7": 118,
    "F8": 119,
    "F9": 120,
    "F10": 121,
    "F11": 122,
    "F12": 123,
    "NUM_LOCK": 144,
    "SCROLL_LOCK": 145,
    "SEMI_COLON": 186,
    "EQUAL_SIGN": 187,
    "COMMA": 188,
    "DASH": 189,
    "PERIOD": 190,
    "FORWARD_SLASH": 191,
    "GRAVE_ACCENT": 192,
    "OPEN_BRACKET": 219,
    "BACK_SLASH": 220,
    "CLOSE_BRAKET": 221,
    "SINGLE_QUOTE": 222
}