const logo = document.getElementById('logo'); const header = document.getElementById("header"); const menuIcon = document.getElementById("menu-icon"); const scrollHeaderListener = () => { if (window.scrollY > 0) { logo.className = "small-logo" menuIcon.classList.add("small-icon") } else { logo.className = "logo" menuIcon.classList.remove("small-icon") } }; window.addEventListener("scroll", scrollHeaderListener); function unfoldHeader() { var headerItems = document.getElementById("header-items"); if (headerItems.className === "header-items") { headerItems.classList.add("responsive") } else { headerItems.classList.remove("responsive") } }