Set the notebook name in the browser tab title

jupyterlab_classic/app.py

@@ -106,6 +106,7 @@ class ClassicApp(NBClassicConfigShimMixin, LabServerApp):
     description = "JupyterLab Classic - A JupyterLab Distribution with the Classic Notebook look and feel"
     app_version = version
     extension_url = "/classic/tree"
+    default_url = "/classic/tree"
     load_other_extensions = True
     app_dir = app_dir
     app_settings_dir = pjoin(app_dir, "settings")

packages/application-extension/src/index.ts

@@ -284,6 +284,32 @@ const spacer: JupyterFrontEndPlugin<void> = {
   }
 };
 
+/**
+ * A plugin to display the document title in the browser tab title
+ */
+const tabTitle: JupyterFrontEndPlugin<void> = {
+  id: '@jupyterlab-classic/application-extension:tab-title',
+  autoStart: true,
+  requires: [IClassicShell],
+  activate: (app: JupyterFrontEnd, shell: IClassicShell) => {
+    const setTabTitle = () => {
+      const current = shell.currentWidget;
+      if (!(current instanceof DocumentWidget)) {
+        return;
+      }
+      const update = () => {
+        const basename = PathExt.basename(current.context.path);
+        document.title = basename;
+      };
+      current.context.pathChanged.connect(update);
+      update();
+    };
+
+    shell.currentChanged.connect(setTabTitle);
+    setTabTitle();
+  }
+};
+
 /**
  * A plugin to display and rename the title of a file
  */
@@ -472,6 +498,7 @@ const plugins: JupyterFrontEndPlugin<any>[] = [
   sessionDialogs,
   shell,
   spacer,
+  tabTitle,
   title,
   topVisibility,
   translator,