From cb7d1faa52908b24e109449efccaf09ac3233d9e Mon Sep 17 00:00:00 2001
From: Anders Kaseorg <anders@zulip.com>
Date: Wed, 7 Jul 2021 21:48:41 -0700
Subject: [PATCH] main: Annotate permissionCallbacks.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
---
 app/main/index.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/app/main/index.ts b/app/main/index.ts
index 73dc2607..c623ae48 100644
--- a/app/main/index.ts
+++ b/app/main/index.ts
@@ -30,7 +30,7 @@ let isQuitting = false;
 // Load this url in main window
 const mainURL = "file://" + path.join(__dirname, "../renderer", "main.html");
 
-const permissionCallbacks = new Map();
+const permissionCallbacks = new Map<number, (grant: boolean) => void>();
 let nextPermissionCallbackId = 0;
 
 const APP_ICON = path.join(__dirname, "../resources", "Icon");
@@ -156,7 +156,7 @@ function createMainWindow(): Electron.BrowserWindow {
   ipcMain.on(
     "permission-callback",
     (event: Event, permissionCallbackId: number, grant: boolean) => {
-      permissionCallbacks.get(permissionCallbackId)(grant);
+      permissionCallbacks.get(permissionCallbackId)?.(grant);
       permissionCallbacks.delete(permissionCallbackId);
     },
   );