1 files changed, 22 insertions, 1 deletions
diff --git a/packages/demobank-ui/src/components/app.tsx b/packages/demobank-ui/src/components/app.tsx
index 8679b05dd..e024be41b 100644
--- a/packages/demobank-ui/src/components/app.tsx
+++ b/packages/demobank-ui/src/components/app.tsx
@@ -24,6 +24,9 @@ import { PageStateProvider } from "../context/pageState.js";
 import { Routing } from "../pages/Routing.js";
 import { strings } from "../i18n/strings.js";
 import { TranslationProvider } from "@gnu-taler/web-util/lib/index.browser";
+import { SWRConfig } from "swr";
+
+const WITH_LOCAL_STORAGE_CACHE = false;
 
 /**
  * FIXME:
@@ -47,7 +50,15 @@ const App: FunctionalComponent = () => {
     <TranslationProvider source={strings}>
       <PageStateProvider>
         <BackendStateProvider>
-          <Routing />
+          <SWRConfig
+            value={{
+              provider: WITH_LOCAL_STORAGE_CACHE
+                ? localStorageProvider
+                : undefined,
+            }}
+          >
+            <Routing />
+          </SWRConfig>
         </BackendStateProvider>
       </PageStateProvider>
     </TranslationProvider>
@@ -58,4 +69,14 @@ const App: FunctionalComponent = () => {
   return globalLogLevel;
 };
 
+function localStorageProvider(): Map<unknown, unknown> {
+  const map = new Map(JSON.parse(localStorage.getItem("app-cache") || "[]"));
+
+  window.addEventListener("beforeunload", () => {
+    const appCache = JSON.stringify(Array.from(map.entries()));
+    localStorage.setItem("app-cache", appCache);
+  });
+  return map;
+}
+
 export default App;