User:Euphoria/common.js

// Load necessary module asynchronously
mw.loader.using(['mediawiki.util'])
    .then(function () {
        // Extract the username from the current page title
        var pageTitle = mw.config.get('wgTitle');
        var username = pageTitle.split('/')[0];

        // Check if the current page is a user page or talk page
        var isUserPage = mw.config.get('wgNamespaceNumber') === 2; // User namespace
        var isTalkPage = mw.config.get('wgNamespaceNumber') === 3; // User talk namespace

        // If the current page is a user page or talk page, add the "SUL" link with the extracted username
        if (isUserPage || isTalkPage) {
            var sulLink = mw.util.addPortletLink(
                'p-cactions',
                mw.util.getUrl('Special:CentralAuth/' + username),
                'SUL',
                'ca-sul',
                'SUL',
                null,
                '#ca-sul'
            );
        }
    });