fix(loader.ts): fix possible undefined (#141)

If msw is running in fallback mode, navigator.serviceWorker may not be defined.
mswjs · Mar 6, 2024 · 7f91bea · 7f91bea
1 parent 7ca8425
commit 7f91bea
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/msw-addon/src/loader.ts b/packages/msw-addon/src/loader.ts
@@ -7,7 +7,7 @@ export const mswLoader = async (context: Context) => {
   if (
     typeof window !== 'undefined' &&
     'navigator' in window &&
-    navigator.serviceWorker.controller
+    navigator.serviceWorker?.controller
   ) {
     // No need to rely on the MSW Promise exactly
     // since only 1 worker can control 1 scope at a time.