KeyLabel.js

function prettyKey(token) {
  var key = String(token || "").trim()
  if (!key) return ""
  var upper = key.toUpperCase()
  var names = {
    SUPER: "Super",
    SHIFT: "Shift",
    CTRL: "Ctrl",
    CONTROL: "Ctrl",
    ALT: "Alt",
    META: "Super",
    MINUS: "-",
    EQUAL: "=",
    LEFT: "←",
    RIGHT: "→",
    UP: "↑",
    DOWN: "↓",
    RETURN: "↵",
    ENTER: "↵",
    BACKSPACE: "⌫",
    ESCAPE: "Esc",
    ESC: "Esc",
    TAB: "Tab",
    SPACE: "Space",
    HOME: "Home",
    SLASH: "/",
    COMMA: ",",
    PERIOD: ".",
    PRINT: "Print",
    DELETE: "Del",
    "LEFT MOUSE BUTTON": "LMB",
    "RIGHT MOUSE BUTTON": "RMB"
  }
  if (names[upper]) return names[upper]
  if (key.length === 1) return key.toUpperCase()
  return key.charAt(0).toUpperCase() + key.slice(1).toLowerCase()
}

function formatChord(chord) {
  var raw = String(chord || "").trim()
  if (!raw) return ""
  var mods = []
  var key = raw
  var plus = raw.lastIndexOf(" + ")
  if (plus >= 0) {
    mods = raw.slice(0, plus).split(/\s+/).filter(function (part) { return part.length > 0 })
    key = raw.slice(plus + 3)
  }
  var tokens = mods.concat([key])
  var out = []
  for (var i = 0; i < tokens.length; i++) {
    var label = prettyKey(tokens[i])
    if (label) out.push(label)
  }
  return out.join("+")
}

if (typeof module !== "undefined" && module.exports) {
  module.exports = { prettyKey: prettyKey, formatChord: formatChord }
}