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.
/*
mw.loader.load('//pl.wikipedia.org/w/index.php?action=raw&ctype=text/javascript&title=Wikipedysta:Nux/hideSidebar.js');
*/
/*
mw.loader.load('//listjs.com/src/list.js');

var options = {
    valueNames: [ 'name', 'city' ]
};

var hackerList = new List('hacker-list', options);
*/