commas

frontend/src/hook/usePersist.js

@@ -0,0 +1,16 @@
+import { useEffect } from 'react';
+
+const DEFAULT_STATE_KEY = 'state';
+
+export const usePersistedContext = (context, key = DEFAULT_STATE_KEY) => {
+  const persistedContext = localStorage.getItem(key);
+  return persistedContext ? JSON.parse(persistedContext) : context;
+};
+
+export const usePersistedReducer = ([state, dispatch], key = DEFAULT_STATE_KEY) => {
+  useEffect(
+    () => localStorage.setItem(key, JSON.stringify(state)),
+    [key, state],
+  );
+  return [state, dispatch];
+};