medialize/ally.js

// codes mostly cloned from https://github.com/keithamus/jwerty/blob/master/jwerty.js
// deliberately not exposing characters like <,.-#* because they vary *wildly*
// across keyboard layouts and may cause various problems
// (e.g. "*" is "Shift +" on a German Mac keyboard)
// (e.g. "@" is "Alt L" on a German Mac keyboard)

const keycode = {
  // Element Focus
  tab: 9,

  // Navigation
  left: 37,
  up: 38,
  right: 39,
  down: 40,
  pageUp: 33,
  'page-up': 33,
  pageDown: 34,
  'page-down': 34,
  end: 35,
  home: 36,

  // Action
  enter: 13,
  escape: 27,
  space: 32,

  // Modifier
  shift: 16,
  capsLock: 20,
  'caps-lock': 20,
  ctrl: 17,
  alt: 18,
  meta: 91,
  // in firefox: 224
  // on mac (chrome): meta-left=91, meta-right=93
  // on win (IE11): meta-left=91, meta-right=92
  pause: 19,

  // Content Manipulation
  insert: 45,
  'delete': 46,
  backspace: 8,

  // the same logical key may be identified through different keyCodes
  _alias: {
    91: [92, 93, 224],
  },
};

// Function keys (112 - 137)
// NOTE: not every keyboard knows F13+
for (let n = 1; n < 26; n++) {
  keycode['f' + n] = n + 111;
}

// Number keys (48-57, numpad 96-105)
// NOTE: not every keyboard knows num-0+
for (let n = 0; n < 10; n++) {
  const code = n + 48;
  const numCode = n + 96;
  keycode[n] = code;
  keycode['num-' + n] = numCode;
  keycode._alias[code] = [numCode];
}

// Latin characters (65 - 90)
for (let n = 0; n < 26; n++) {
  const code = n + 65;
  const name = String.fromCharCode(code).toLowerCase();
  keycode[name] = code;
}

export default keycode;