ageKey = 'readNotification'
    const bannerHiding = document.querySelector('#notification_banner').dataset['bannerHiding']
    const cssVariableName = '--navbarHeight'
    const rootElement = document.documentElement

    /*************************************************************************/
    // Local storage for remembering if the user has read the notification.

    function checkAlreadyRead() {
        return localStorage.getItem(localStorageKey) == notificationContent
    }

    function setRea