subline/views/shared/banner.ejs

<div class="banner">
    <p></p>
</div>

<script>
    let banner = {
        createNotification: (val)=>{
            let currentBanner = document.querySelector(".banner");
            let bannerText = document.querySelector(".banner p");
            currentBanner.style.display = "inline-block";
            bannerText.innerText = val;
            bannerText.classList = "notification";

            setTimeout(()=>{
                currentBanner.style.display = "none";
            }, 10000);
        },

        createError: (val)=>{
            let currentBanner = document.querySelector(".banner");
            let bannerText = document.querySelector(".banner p");
            currentBanner.style.display = "inline-block";
            bannerText.innerText = val;
            bannerText.classList = "error";

            setTimeout(()=>{
                currentBanner.style.display = "none";
            }, 10000);
        }
    }
</script>