// foundation CSS
loadjs(['https://cdnjs.cloudflare.com/ajax/libs/foundation/6.6.1/css/foundation.min.css'], { target: iframeWin });

// jQuery + foundation Javascript
loadjs(['https://code.jquery.com/jquery-3.4.1.min.js', 'https://cdnjs.cloudflare.com/ajax/libs/foundation/6.6.1/js/foundation.min.js'], 'core-preview', { async: false, target: iframeWin });