1 files changed, 8 insertions, 0 deletions
diff --git a/Timeline/ClientApp/src/app/data/common.ts b/Timeline/ClientApp/src/app/data/common.ts
index 786279f2..35934a29 100644
--- a/Timeline/ClientApp/src/app/data/common.ts
+++ b/Timeline/ClientApp/src/app/data/common.ts
@@ -1,5 +1,7 @@
 import localforage from 'localforage';
 
+import { HttpNetworkError } from '../http/common';
+
 export const dataStorage = localforage.createInstance({
   name: 'data',
   description: 'Database for offline data.',
@@ -11,3 +13,9 @@ export class ForbiddenError extends Error {
     super(message);
   }
 }
+
+export function throwIfNotNetworkError(e: unknown): void {
+  if (!(e instanceof HttpNetworkError)) {
+    throw e;
+  }
+}