diff --git a/tools/test-js-with-node b/tools/test-js-with-node
index 03ba596e67..df7d71538e 100755
--- a/tools/test-js-with-node
+++ b/tools/test-js-with-node
@@ -141,7 +141,7 @@ EXEMPT_FILES = make_set(
         "web/src/popovers.js",
         "web/src/read_receipts.js",
         "web/src/ready.ts",
-        "web/src/realm_icon.js",
+        "web/src/realm_icon.ts",
         "web/src/realm_logo.js",
         "web/src/realm_playground.ts",
         "web/src/realm_user_settings_defaults.ts",
diff --git a/web/src/page_params.ts b/web/src/page_params.ts
index 772ff3ee9d..0d359a0ec1 100644
--- a/web/src/page_params.ts
+++ b/web/src/page_params.ts
@@ -21,6 +21,7 @@ export const page_params: {
     is_owner: boolean;
     is_spectator: boolean;
     max_avatar_file_size_mib: number;
+    max_icon_file_size_mib: number;
     muted_users: {id: number; timestamp: number}[];
     needs_tutorial: boolean;
     page_load_time: number;
@@ -35,6 +36,8 @@ export const page_params: {
     realm_edit_topic_policy: number;
     realm_email_changes_disabled: boolean;
     realm_enable_spectator_access: boolean;
+    realm_icon_source: string;
+    realm_icon_url: string;
     realm_invite_to_realm_policy: number;
     realm_invite_to_stream_policy: number;
     realm_is_zephyr_mirror_realm: boolean;
diff --git a/web/src/realm_icon.js b/web/src/realm_icon.ts
similarity index 80%
rename from web/src/realm_icon.js
rename to web/src/realm_icon.ts
index c48e845835..eabea47d39 100644
--- a/web/src/realm_icon.js
+++ b/web/src/realm_icon.ts
@@ -3,10 +3,11 @@ import $ from "jquery";
 import * as channel from "./channel";
 import {page_params} from "./page_params";
 import * as upload_widget from "./upload_widget";
+import type {UploadFunction} from "./upload_widget";
 
-export function build_realm_icon_widget(upload_function) {
-    const get_file_input = function () {
-        return $("#realm-icon-upload-widget .image_file_input").expectOne();
+export function build_realm_icon_widget(upload_function: UploadFunction): void {
+    const get_file_input = function (): JQuery<HTMLInputElement> {
+        return $<HTMLInputElement>("#realm-icon-upload-widget .image_file_input").expectOne();
     };
 
     if (!page_params.is_admin) {
@@ -20,7 +21,7 @@ export function build_realm_icon_widget(upload_function) {
     $("#realm-icon-upload-widget .image-delete-button").on("click", (e) => {
         e.preventDefault();
         e.stopPropagation();
-        channel.del({
+        void channel.del({
             url: "/json/realm/icon",
         });
     });
@@ -34,7 +35,7 @@ export function build_realm_icon_widget(upload_function) {
     );
 }
 
-export function rerender() {
+export function rerender(): void {
     $("#realm-icon-upload-widget .image-block").attr("src", page_params.realm_icon_url);
     if (page_params.realm_icon_source === "U") {
         $("#realm-icon-upload-widget .image-delete-button").show();