combineReducers Function in Redux

In Redux, the combineReducers function is a utility that allows you to combine multiple reducers into a single reducer function. This is especially useful in large applications where the state is divided into different slices, each managed by a separate reducer. Instead of manually combining each reducer, combineReducers simplifies this process and ensures that each slice of state is handled by the appropriate reducer.

Purpose of combineReducers

• Modular Reducers: Helps in keeping the application modular by splitting the state management into smaller, focused reducers. Each reducer manages a specific part or “slice” of the state.
• Automatic State Mapping: It automatically maps the returned state of each individual reducer to the corresponding slice of the state.
• Simplified Structure: Combines multiple reducers into one, making it easier to maintain and scale the application.

Syntax of combineReducers

import { combineReducers } from 'redux';

const rootReducer = combineReducers({
  slice1: slice1Reducer,
  slice2: slice2Reducer,
  slice3: slice3Reducer,
  // Add more reducers for each slice of the state
});

Here:

• slice1, slice2, and slice3 represent different slices of the…