Key shortcut configuration macOS alike

shortcuts.js

$('input').keydown(function (e) {
  e.preventDefault();
  
  var keys = [];
  
  e.altKey && keys.push('⌥');
  e.ctrlKey && keys.push('⌃');
  e.metaKey && keys.push('⌘');
  e.shiftKey && keys.push('⇧');

  keys.push(String.fromCharCode(e.which));

  this.value = keys.join('');
  
  return false;
});