init here

frontend/app.js

@@ -0,0 +1,36 @@
+import { routerNavigate, route } from "./router.js";
+import {
+  loadSession,
+  clearSession,
+  setTopUser,
+  setLogoutVisible,
+} from "./utils.js";
+import "./views/auth.js";
+import "./views/teacher.js";
+import "./views/student.js";
+
+route("/404", async ({ view }) => {
+  const card = document.createElement("div");
+  card.className = "card";
+  card.innerHTML = `<div class="card-header">Страница не найдена</div><div class="card-body">Нет такой страницы</div>`;
+  view.appendChild(card);
+});
+
+function initTop() {
+  const s = loadSession();
+  if (s) {
+    setTopUser(s.username);
+    setLogoutVisible(true);
+  }
+  document.getElementById("btn-logout").addEventListener("click", () => {
+    clearSession();
+    setTopUser("");
+    setLogoutVisible(false);
+    location.hash = "#/auth/login";
+  });
+}
+
+window.addEventListener("DOMContentLoaded", () => {
+  initTop();
+  routerNavigate();
+});