HW/final_project/src/store/reducers/local-store-reducer.js

function localStoreReducer(reducer, localStorageKey) {
    function localStoredReducer(state, action) {
        if (state === undefined) {
            try {
                return JSON.parse(localStorage[localStorageKey]);
            } catch (e) { }
        }
        const newState = reducer(state, action);
        localStorage[localStorageKey] = JSON.stringify(newState);
        return newState;
    }
    return localStoredReducer;
}