MediaWiki:Common.js

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mw.hook('ext.popups').add(function() {
    $('.mwe-popups-extract .portable-infobox').each(function() {
        var $infobox = $(this);
        var $firstParagraph = $('.mwe-popups-extract p:first');

        // If there is a paragraph, move the infobox after it
        if ($firstParagraph.length) {
            $infobox.insertAfter($firstParagraph);
        } else {
            // If there's no paragraph, just hide the infobox
            $infobox.hide();
        }
    });
});