Experiment

function getCookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(';'); for (var i = 0; i < ca.length; i++) { var c = ca[i]; while (c.charAt(0) == ' ') c = c.substring(1, c.length); if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length); } return null; } function onPageLoad() { const bannerClosed = getCookie("promoBannerClosed"); if (bannerClosed) { return; } const timeOutTime = 20000; setTimeout(function() { $('#promoModal').modal('show'); }, timeOutTime); } $('#promoModal').on('hidden.bs.modal', function(e) { document.cookie = "promoBannerClosed=true; path=/"; }) $('#promoBannerLink').on('click', function(e) { document.cookie = "promoBannerClosed=true; path=/"; }) window.onload = onPageLoad;