getKeyName.js

var keyCodeMap = {
  8: 'Backspace',
  9: 'Tab',
  13: 'Enter',
  16: 'Shift',
  17: 'Ctrl',
  18: 'Alt',
  19: 'Pause',
  20: 'Caps Lock',
  27: 'Escape',
  32: 'Space',
  33: 'Page Up',
  34: 'Page Down',
  35: 'End',
  36: 'Home',
  37: 'Left',
  38: 'Up',
  39: 'Right',
  40: 'Down',
  42: 'Print Screen',
  45: 'Insert',
  46: 'Delete',

  48: '0',
  49: '1',
  50: '2',
  51: '3',
  52: '4',
  53: '5',
  54: '6',
  55: '7',
  56: '8',
  57: '9',

  65: 'A',
  66: 'B',
  67: 'C',
  68: 'D',
  69: 'E',
  70: 'F',
  71: 'G',
  72: 'H',
  73: 'I',
  74: 'J',
  75: 'K',
  76: 'L',
  77: 'M',
  78: 'N',
  79: 'O',
  80: 'P',
  81: 'Q',
  82: 'R',
  83: 'S',
  84: 'T',
  85: 'U',
  86: 'V',
  87: 'W',
  88: 'X',
  89: 'Y',
  90: 'Z',

  91: 'Windows',
  93: 'Right Click',

  96: 'Numpad 0',
  97: 'Numpad 1',
  98: 'Numpad 2',
  99: 'Numpad 3',
  100: 'Numpad 4',
  101: 'Numpad 5',
  102: 'Numpad 6',
  103: 'Numpad 7',
  104: 'Numpad 8',
  105: 'Numpad 9',
  106: 'Numpad *',
  107: 'Numpad +',
  109: 'Numpad -',
  110: 'Numpad .',
  111: 'Numpad /',

  112: 'F1',
  113: 'F2',
  114: 'F3',
  115: 'F4',
  116: 'F5',
  117: 'F6',
  118: 'F7',
  119: 'F8',
  120: 'F9',
  121: 'F10',
  122: 'F11',
  123: 'F12',

  144: 'Num Lock',
  145: 'Scroll Lock',
  182: 'My Computer',
  183: 'My Calculator',
  186: ';',
  187: '=',
  188: ',',
  189: '-',
  190: '.',
  191: '/',
  192: '`',
  219: '[',
  220: '\\',
  221: ']',
  222: '\''
};
/**
* @desc 根据keycode获得键名
* @param  {Number} keycode 
* @return {String}
*/
function getKeyName(keycode) {
  if (keyCodeMap[keycode]) {
      return keyCodeMap[keycode];
  } else {
      console.log('Unknow Key(Key Code:' + keycode + ')');
      return '';
  }
};