1 files changed, 18 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/platform/dev.ts b/packages/taler-wallet-webextension/src/platform/dev.ts
index 005421876..976ac05f5 100644
--- a/packages/taler-wallet-webextension/src/platform/dev.ts
+++ b/packages/taler-wallet-webextension/src/platform/dev.ts
@@ -34,6 +34,7 @@ const api: BackgroundPlatformAPI & ForegroundPlatformAPI = {
   keepAlive: (cb: VoidFunction) => cb(),
   findTalerUriInActiveTab: async () => undefined,
   findTalerUriInClipboard: async () => undefined,
+  listenNetworkConnectionState,
   getPermissionsApi: () => ({
     addPermissionsListener: () => undefined,
     containsHostPermissions: async () => true,
@@ -197,3 +198,20 @@ interface IframeMessageCommand {
 }
 
 export default api;
+
+function listenNetworkConnectionState(
+  notify: (state: "on" | "off") => void,
+): () => void {
+  function notifyOffline() {
+    notify("off");
+  }
+  function notifyOnline() {
+    notify("on");
+  }
+  window.addEventListener("offline", notifyOffline);
+  window.addEventListener("online", notifyOnline);
+  return () => {
+    window.removeEventListener("offline", notifyOffline);
+    window.removeEventListener("online", notifyOnline);
+  };
+}