MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
mw.loader.using('mediawiki.user', function () {
    var userGroups = mw.config.get('wgUserGroups');
    if (userGroups.includes('TrustedEditors') || userGroups.includes('TrialEditors') || userGroups.includes('sysop')) {
        $('.trusted-editors-only').show();
    } else {
        $('.trusted-editors-only').hide();
    }
});