er has read the notification.

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

    function setRead() {
        localStorage.setItem(localStorageKey, notificationContent)
    }

    function clearRead() {
        localStorage.removeItem(localStorageKey)
    }

    const alreadyRead = checkAlreadyRead()
    const permanentlyHidden = alreadyRead && bannerHiding == 'permanent'

    /************************************************************