ror() {
            var errorElm = document.getElementById("jhipster-error");
            if (errorElm && errorElm.style) {
                errorElm.style.display = "block";
            }
        }
    </script>
    <!-- uncomment this for adding service worker
        <script>
            if ('serviceWorker' in navigator) {
                window.addEventListener('load', function() {
                    navigator.serviceWorker.register('/service-worker.js')
                        .then(function () {
     