diff --git a/tools/test-js-with-node b/tools/test-js-with-node
index 942231d100..c6332a54da 100755
--- a/tools/test-js-with-node
+++ b/tools/test-js-with-node
@@ -163,7 +163,7 @@ EXEMPT_FILES = make_set(
         "web/src/narrow_title.ts",
         "web/src/navbar_alerts.ts",
         "web/src/navbar_help_menu.ts",
-        "web/src/navbar_menus.js",
+        "web/src/navbar_menus.ts",
         "web/src/navigate.js",
         "web/src/onboarding_steps.ts",
         "web/src/overlay_util.ts",
diff --git a/web/src/hotkey.js b/web/src/hotkey.js
index 674963f1d0..bf1e2eea0f 100644
--- a/web/src/hotkey.js
+++ b/web/src/hotkey.js
@@ -35,7 +35,7 @@ import * as message_scroll_state from "./message_scroll_state.ts";
 import * as message_view from "./message_view.ts";
 import * as modals from "./modals.ts";
 import * as narrow_state from "./narrow_state.ts";
-import * as navbar_menus from "./navbar_menus.js";
+import * as navbar_menus from "./navbar_menus.ts";
 import * as navigate from "./navigate.js";
 import * as overlays from "./overlays.ts";
 import {page_params} from "./page_params.ts";
diff --git a/web/src/navbar_menus.js b/web/src/navbar_menus.ts
similarity index 86%
rename from web/src/navbar_menus.js
rename to web/src/navbar_menus.ts
index 4fd6348a00..b5b8976f37 100644
--- a/web/src/navbar_menus.js
+++ b/web/src/navbar_menus.ts
@@ -6,7 +6,7 @@ import * as personal_menu_popover from "./personal_menu_popover.ts";
 import * as popover_menus from "./popover_menus.ts";
 import * as popovers from "./popovers.ts";
 
-export function is_navbar_menus_displayed() {
+export function is_navbar_menus_displayed(): boolean {
     return (
         popover_menus.is_personal_menu_popover_displayed() ||
         popover_menus.is_gear_menu_popover_displayed() ||
@@ -14,17 +14,17 @@ export function is_navbar_menus_displayed() {
     );
 }
 
-export function any_focused() {
+export function any_focused(): boolean {
     return $(".navbar-item:visible").is(":focus");
 }
 
-export function blur_focused() {
+export function blur_focused(): void {
     if (any_focused()) {
         $(".navbar-item:visible").filter(":focus").trigger("blur");
     }
 }
 
-export function handle_keyboard_events(event_name) {
+export function handle_keyboard_events(event_name: string): boolean {
     const allowed_events = new Set(["gear_menu", "left_arrow", "right_arrow"]);
     if (!allowed_events.has(event_name)) {
         return false;
@@ -44,7 +44,7 @@ export function handle_keyboard_events(event_name) {
     return change_active_navbar_menu(target_menu);
 }
 
-function change_active_navbar_menu(target_menu) {
+function change_active_navbar_menu(target_menu: string): boolean {
     popovers.hide_all();
     blur_focused();
     switch (target_menu) {
@@ -66,7 +66,10 @@ function change_active_navbar_menu(target_menu) {
     }
 }
 
-function get_target_navbar_menu(event_name, $current_navbar_menu) {
+function get_target_navbar_menu(
+    event_name: string,
+    $current_navbar_menu: JQuery,
+): string | undefined {
     const $visible_navbar_menus = $(".navbar-item:visible");
     const index = $visible_navbar_menus.index($current_navbar_menu);
     let $target_navbar_menu;