Persist State of Redux on Refresh in React.js - redux

Question

I am using redux in react.js When i refresh the application, redux state also get refreshed. How can I persist the redux state, without using the local storage.
I don't want to know about redux-persist/redux-storage package

Answer 1

In Main Class:
import PersistedStore from "./PersistedStore";
ReactDOM.render(
<Provider store={PersistedStore.getDefaultStore().store}><MainClass />
</Provider>,
document.getElementById('root')
);
add the following class to your project
import {
createStore
} from "redux";
import rootreducer from './RootReducer'
const LOCAL_STORAGE_NAME = "localData";
class PersistedStore {
// Singleton property
static DefaultStore = null;
// Accessor to the default instance of this class
static getDefaultStore() {
if (PersistedStore.DefaultStore === null) {
PersistedStore.DefaultStore = new PersistedStore();
}
return PersistedStore.DefaultStore;
}
// Redux store
_store = null;
// When class instance is used, initialize the store
constructor() {
this.initStore()
}
// Initialization of Redux Store
initStore() {
this._store = createStore(rootReducer, PersistedStore.loadState());
this._store.subscribe(() => {
PersistedStore.saveState(this._store.getState());
});
}
// Getter to access the Redux store
get store() {
return this._store;
}
// Loading persisted state from localStorage, no need to access
// this method from the outside
static loadState() {
try {
let serializedState = localStorage.getItem(LOCAL_STORAGE_NAME);
if (serializedState === null) {
return PersistedStore.initialState();
}
return JSON.parse(serializedState);
} catch (err) {
return PersistedStore.initialState();
}
}
// Saving persisted state to localStorage every time something
// changes in the Redux Store (This happens because of the subscribe()
// in the instore-method). No need to access this method from the outside
static saveState(state) {
try {
let serializedState = JSON.stringify(state);
localStorage.setItem(LOCAL_STORAGE_NAME, serializedState);
} catch (err) {}
}
// Return whatever you want your initial state to be
static initialState() {
return {};
}
}
export default PersistedStore;