add: boostrap navbar

frontend/static/js/index.js

@@ -109,10 +109,15 @@ document.addEventListener("DOMContentLoaded", () => {
     document.body.addEventListener("click", e => {
         if (e.target.matches("[data-link]")) {
             e.preventDefault();
+			document.querySelectorAll('[data-link]').forEach(e => {
+				e.classList.remove('active');
+			});
+			e.target.classList.add('active');
             navigateTo(e.target.href.slice(location.origin.length));
         }
     });
     router(location.pathname);
+	document.querySelector('a[href=\'' + location.pathname + '\']').classList.add('active');
 });
 
 export { client, navigateTo }