function setCookieFromChild() { // Set the "footer_close" cookie with a value of "closed" in the parent document window.parent.postMessage({ type: 'setCookie', cookieName: 'footer_close', cookieValue: 'closed' }, '*'); } function closeFooter() { // Set the "footer_close" cookie with a value of "closed" setCookieFromChild(); // Use a more specific selector to target the banner element var bannerElement = document.querySelector('.piano-ds-opinion.sticky-bottom'); // Check if the element exists before trying to modify it if (bannerElement) { bannerElement.style.display = 'none'; } }