diff --git a/src/web/src/App.vue b/src/web/src/App.vue
index 56faad6..a84ae55 100644
--- a/src/web/src/App.vue
+++ b/src/web/src/App.vue
@@ -1,13 +1,37 @@
 <template>
-  <page-login v-if="null === appStore.accessToken" />
-  <page-engineering v-else-if="'engineering' === appStore.accessToken" />
-  <page-main v-else />
+  <template v-if="ready">
+    <page-login v-if="null === appStore.accessToken" />
+    <page-engineering v-else-if="'engineering' === appStore.accessToken" />
+    <page-main v-else />
+  </template>
 </template>
 <script setup>
 import PageMain from './pages/main/Page.vue'
 import PageLogin from './pages/login/Page.vue'
 import PageEngineering from './pages/engineering/Page.vue'
 import { useAppStore } from '@/stores/AppStore';
+import { ref, onMounted } from 'vue';
 /** @var {AppStore} */
 const appStore = useAppStore();
+/** @var {Ref<boolean>} */
+const ready = ref(false);
+// on mounted
+onMounted(mounted);
+
+// mounted
+function mounted() {
+    let accessToken = window.localStorage.getItem('accessToken');
+    accessToken = accessToken ? accessToken : null;
+    appStore.setAccessToken(accessToken);
+    ready.value = true;
+
+    window.onbeforeunload = function() {
+        return "确定要离开吗？";
+    }
+}
 </script>
+<style>
+body {
+  overscroll-behavior-y: contain;
+}
+</style>
\ No newline at end of file