MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

// MediaWiki:Common.js
mw.hook('vector.toc.ready').add(function (toc) {
    if (mw.config.get('wgPageName') === 'Main_Page') {
        toc.unpin(); // hides the TOC immediately
    }
});