mw.loader.using('mediawiki.storage').then(function () {
	// Opt out of error logging before loading. User:Vlsergey/wef.js is responsible for 10,000+ errors with message:
	// "TypeError: Cannot read properties of undefined (reading 'setAttribute')"
	// This can be removed if reported fixed.
	mw.storage.session.set( 'client-error-opt-out', '1' );
	mediaWiki.loader.load( '//ru.wikipedia.org/w/index.php?title=User:Vlsergey/wef.js&action=raw&ctype=text/javascript' ).then( function () {
		mw.storage.session.remove( 'client-error-opt-out');
	})
});