MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */
(function($, mw) {
    console.log('js test');
    if (mw.config.get('wgNamespaceNumber') === 0) {
        var categories = mw.config.get('wgCategories'); // Get the list of categories for the page

        // Check if the page belongs to the desired category
        if (categories && categories.includes('Pages using gadget HexConverter')) {
            console.log('yaa');
        }
    }
})( jQuery , mediaWiki );