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' ) && ( typeof refToolbarInstalled == 'undefined' )) {
	importScript('MediaWiki:RefToolbarBase.js');
	if( typeof $.wikiEditor != 'undefined' && typeof $.wikiEditor.modules.dialogs != 'undefined' ) {
		importScript('MediaWiki:RefToolbar.js');
	} else if( typeof $.wikiEditor != 'undefined' ) {
		importScript('MediaWiki:RefToolbarNoDialogs.js');
	} else {
		importScript('MediaWiki:RefToolbarLegacy.js');
	}
	refToolbarInstalled = true;
}