Keycodes

Started as my own simple map of named keycode constants, but evolved to my preferred semantics of this well done package: timoxley/keycode. Now it's not much more than a personal fork of this package.

Installation

npm

npm install @alexsasharegan/keycodes

Example

const keycode = require('@alexsasharegan/keycodes');

document.addEventListener('keydown', e => console.log(`You pressed: ${keycode(e)}`) );

API

keycode tries to make an intelligent guess as to what you're trying to discover based on the type of argument you supply.

##keycode(keycode:Event)

Returns the name of the key associated with this event.

document.addEventListener('keyup', e => console.log(keycode(e)) ); // prints name of key

Due to the keypress event being weird,keycodes currently does not support the keypress event, but this should not be an issue as keydown and keyup work perfectly fine.

##keycode(keycode:Number)

Returns the constant name of a given numeric keycode.

keycode(13); // => 'ENTER'
keycode(37); // => 'LEFT_ARROW'

##keycode(name:String)

Returns the numeric keycode for given key name.

keycode('Enter'); // => 13

// keycode is not case sensitive
keycode('eNtEr'); // => 13

Maps

Key code/name maps are available directly as keycode.codes and keycode.names respectively.

keycode.names.ENTER; // => 13
keycode.codes[13]; // => 'ENTER'

keycode.names:

{
  "BACKSPACE": 8,
  "TAB": 9,
  "CLEAR": 12,
  "RETURN": 13,
  "ENTER": 13,
  "SHIFT": 16,
  "CONTROL": 17,
  "ALT": 18,
  "OPTION": 18,
  "PAUSE_BREAK": 19,
  "CAPS_LOCK": 20,
  "ESCAPE": 27,
  "SPACE_BAR": 32,
  "PAGE_UP": 33,
  "PAGE_DOWN": 34,
  "END": 35,
  "HOME": 36,
  "LEFT_ARROW": 37,
  "UP_ARROW": 38,
  "RIGHT_ARROW": 39,
  "DOWN_ARROW": 40,
  "INSERT": 45,
  "DELETE": 46,
  "COMMAND": [
    91,
    93,
    224
  ],
  "COMMAND_LEFT": [
    91,
    224
  ],
  "WINDOWS": [
    91,
    224
  ],
  "COMMAND_RIGHT": [
    93,
    224
  ],
  "WINDOWS_MENU": [
    93,
    224
  ],
  "NUMPAD_ASTERISK": 106,
  "NUMPAD_PLUS": 107,
  "NUMPAD_DASH": 109,
  "NUMPAD_MINUS": 109,
  "NUMPAD_HYPHEN": 109,
  "NUMPAD_PERIOD": 110,
  "NUMPAD_FORWARD_SLASH": 111,
  "NUM_LOCK": 144,
  "SCROLL_LOCK": 145,
  "MY_COMPUTER": 182,
  "MY_CALCULATOR": 183,
  "SEMICOLON": 186,
  "EQUALS": 187,
  "COMMA": 188,
  "DASH": 189,
  "MINUS": 189,
  "HYPHEN": 189,
  "PERIOD": 190,
  "FORWARD_SLASH": 191,
  "BACKTICK": 192,
  "LEFT_BRACKET": 219,
  "BACKSLASH": 220,
  "RIGHT_BRACKET": 221,
  "APOSTROPHE": 222,
  "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,
  "F1": 112,
  "F2": 113,
  "F3": 114,
  "F4": 115,
  "F5": 116,
  "F6": 117,
  "F7": 118,
  "F8": 119,
  "F9": 120,
  "F10": 121,
  "F11": 122,
  "F12": 123,
  "F13": 124,
  "F14": 125,
  "F15": 126,
  "F16": 127,
  "F17": 128,
  "F18": 129,
  "F19": 130,
  "ZERO": 48,
  "ONE": 49,
  "TWO": 50,
  "THREE": 51,
  "FOUR": 52,
  "FIVE": 53,
  "SIX": 54,
  "SEVEN": 55,
  "EIGHT": 56,
  "NINE": 57,
  "NUMPAD_ZERO": 96,
  "NUMPAD_ONE": 97,
  "NUMPAD_TWO": 98,
  "NUMPAD_THREE": 99,
  "NUMPAD_FOUR": 100,
  "NUMPAD_FIVE": 101,
  "NUMPAD_SIX": 102,
  "NUMPAD_SEVEN": 103,
  "NUMPAD_EIGHT": 104,
  "NUMPAD_NINE": 105
}

Credit

timoxley/keycode