CSS selectors in Chrome

selector.js

/* 
  Bootstrap Online LLC. Released under the Apache license.
  https://www.apache.org/licenses/LICENSE-2.0

  Print CSS selector for the provided element.
  Example using the currently selected item in Chrome Dev Tools:
  c( $0 );
 */
function c( element ) {
  var result = '';
  var space  = /\s/g;
  var target = element;

  while( target ) {
    var id = target.id + '';
    if ( id !== '' && id !== 'undefined' ) {
        result = ' #' + id.replace( space, '.' ) + result;
    } else {
      var list = target.classList + '';
      if ( list !== '' && list !== 'undefined' ) {
        result = ' .' + list.replace( space, '.' ) + result;
      }
    }

    var parent = target.parentNode;
    target = parent ? parent : false;
  }
  // Ensure only one period per item.
  return result.replace(/\.+/g,'.').trim();
}