What is Redux Toolkit middleware and how do I use it?

What is Redux Toolkit middleware and how do I use it?

Redux Toolkit middleware is a way to extend Redux's capabilities. It allows you to intercept actions before they reach the reducer, enabling you to perform side effects, logging, or even modifying actions.

Can you give me an example of a middleware function?

Sure! Here's a simple logging middleware:

const loggerMiddleware = store => next => action => {
  console.log('Dispatching:', action);
  return next(action);
};

This middleware logs every action that is dispatched.

How do I apply this middleware in my Redux store?

You can apply middleware using the configureStore function from Redux Toolkit. Here's how:

import { configureStore } from '@reduxjs/toolkit';

const store = configureStore({
  reducer: rootReducer,
  middleware: (getDefaultMiddleware) => getDefaultMiddleware().concat(loggerMiddleware),
});

What are some common use cases for middleware?

Common use cases include logging actions, handling asynchronous requests, and managing side effects like API calls.