import { configureStore, createSlice } from '@reduxjs/toolkit'; const slice = createSlice({ name: 'test', initialState: { part1: { title: 'Hello World!', x: 1, }, part2: { title: 'Hello OtherWorld!', x: 2, }, }, reducers: { increment1: (state) => { state.part1.x++; }, increment2: (state) => { state.part2.x++; }, }, }); export const actions = slice.actions; const store = configureStore({ reducer: { test: slice.reducer }, }); export default store;