Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
if ( mw.config.get('wgAction') == 'edit' || mw.config.get('wgAction') == 'submit' ) {
  if (mw.config.get('wgServer') == "https://secure.wikimedia.org") {
    mw.loader.load("https://secure.wikimedia.org/wikipedia/en/w/index.php?title=User:Mr.Z-man/refToolbar_2.0/base.js&action=raw&ctype=text/javascript");
  } else {
    mw.loader.load('//en.wikipedia.org/w/index.php?title=User:Mr.Z-man/refToolbar_2.0/base.js&action=raw&ctype=text/javascript');
  }
  if( typeof $.wikiEditor != 'undefined' && typeof $.wikiEditor.modules.dialogs != 'undefined' ) {
    importScript('User:Kaldari/refToolbar 2.0.js');
  } else if( typeof $.wikiEditor != 'undefined' ) {
    importScript('User:Mr.Z-man/refToolbarIE.js');
  } else {
    importScript('User:Apoc2400/refToolbarPlus.js');
  }
  refToolbarInstalled = true;
}