how to insert keycode in switch statement in javascript code example

Example: how to insert keycode in switch statement in javascript

$(window).on('keydown', function (e) {
e.preventDefault();

  if( e.KeyCode == 8 ) {
    $('div').append('
if
');
  }

  switch (e.keyCode) {
    case 8: // Backspace
      $('div').append('
switch
');
      break;
  }

});