webpack-bootstrap-ui-kit/src/js/ajax/apollo/cache.js

import { InMemoryCache } from "@apollo/client";

//import { IonicStorageModule } from '@ionic/storage';
//import { persistCache, IonicStorageWrapper } from 'apollo3-cache-persist';
import { persistCacheSync, LocalStorageWrapper } from "apollo3-cache-persist";

const cache = new InMemoryCache();

// await before instantiating ApolloClient, else queries might run before the cache is persisted
//await persistCache({
persistCacheSync({
  cache,
  storage: new LocalStorageWrapper(window.localStorage),
  key: "web-persist",
  maxSize: 1048576, // 1Mb
  //new IonicStorageWrapper(IonicStorageModule),
});

export { cache };