Note: After saving, you have to bypass your browser's cache to see the changes. Internet Explorer: press Ctrl-F5, Mozilla: hold down Shift while clicking Reload (or press Ctrl-Shift-R), Opera/Konqueror: press F5, Safari: hold down Shift + Alt while clicking Reload, Chrome: hold down Shift while clicking Reload.
// First wait for mediawiki.util to load, and the page to be ready.$.when(mw.loader.using('mediawiki.util'),$.ready).then(function(){consttitle=mw.config.get('wgPageName');// Add link to toolbar.mw.util.addPortletLink('p-tb',/* portletId */'/wiki/Special:PrefixIndex/'+title,/* href */'Pages with prefix',/* text */'t-prefixindex',/* id */'A list of all wiki pages with this prefix [⌃⌥i]',/* tooltip */'i'/* accesskey *//* '#t-recentchangeslinked' nextnode */);});