MediaWiki:Common.js: Difference between revisions

/* MediaWiki:Common.js
   Global JS for the wiki.
   - Keeps FAQ expand/collapse handlers.
   - Adds reliable body classes (mw-user / mw-anonuser) using mw.config.get('wgUserId').
   - Lightweight and safe; fails silently if mw or mw.config is unavailable.
*/

/* Expand/Collapse all for FAQList */
mw.hook('wikipage.content').add(function ($content) {

    // Expand all
    $content.on('click', '.faq-expand-all', function () {
        $('.faq-list details').attr('open', true);
    });

    // Collapse all
    $content.on('click', '.faq-collapse-all', function () {
        $('.faq-list details').removeAttr('open');
    });

});

/* Helper: ensure body has mw-user or mw-anonuser so CSS can target logged-in vs anon reliably.
   Uses mw.config.get('wgUserId') which is present in all ResourceLoader contexts.
*/
(function () {
    try {
        if ( typeof mw === 'undefined' || !mw.config || typeof mw.config.get !== 'function' ) {
            // mw or mw.config not available yet — try again after DOM ready
            document.addEventListener('DOMContentLoaded', function () {
                try {
                    var uid = (window.mw && mw.config && mw.config.get) ? mw.config.get('wgUserId') : null;
                    if (!uid) {
                        document.body.classList.add('mw-anonuser');
                        document.body.classList.remove('mw-user');
                    } else {
                        document.body.classList.add('mw-user');
                        document.body.classList.remove('mw-anonuser');
                    }
                } catch (e) {
                    if (window.console && console.warn) console.warn('Common.js body class helper (deferred) failed', e);
                }
            }, { once: true });
            return;
        }

        // If body exists now, set classes immediately; otherwise wait for DOMContentLoaded
        function setBodyClass() {
            try {
                var uid = mw.config.get('wgUserId');
                if (!uid || uid === 0 || uid === '') {
                    document.body.classList.add('mw-anonuser');
                    document.body.classList.remove('mw-user');
                } else {
                    document.body.classList.add('mw-user');
                    document.body.classList.remove('mw-anonuser');
                }
            } catch (e) {
                if (window.console && console.warn) console.warn('Common.js body class helper failed', e);
            }
        }

        if (document.body) {
            setBodyClass();
        } else {
            document.addEventListener('DOMContentLoaded', setBodyClass, { once: true });
        }
    } catch (e) {
        if (window.console && console.warn) console.warn('Common.js initialization failed', e);
    }
}());