diff --git a/frontend/src/ts/ready.ts b/frontend/src/ts/ready.ts
index 9554990b7963..b19e2b201284 100644
--- a/frontend/src/ts/ready.ts
+++ b/frontend/src/ts/ready.ts
@@ -105,12 +105,24 @@ $(document).ready(() => {
 });
 
 window.onerror = function (message, url, line, column, error): void {
+  if (Misc.isDevEnvironment()) {
+    Notifications.add(error?.message ?? "Undefined message", -1, {
+      customTitle: "DEV: Unhandled error",
+      duration: 5,
+    });
+  }
   void log("error", {
     error: error?.stack ?? "",
   });
 };
 
 window.onunhandledrejection = function (e): void {
+  if (Misc.isDevEnvironment()) {
+    Notifications.add(e.reason.message, -1, {
+      customTitle: "DEV: Unhandled rejection",
+      duration: 5,
+    });
+  }
   void log("error", {
     error: e.reason.stack ?? "",
   });