In this lesson you:

• Learned about Redux middleware and wrote your own simple logging middleware
• Encountered thunks and learned about how valuable thunks are for deferring computation

const remindMeLater = task => { 
  return () => {
    remindMeTo(task)
  } 
} 

• Discovered redux-thunk, a middleware that allows you to write asynchronous action creators that return thunks instead of objects

• Automatically enabled redux-thunk by using configureStore

import { configureStore } from '@reduxjs/toolkit;

• Took a deep dive into the middleware’s source code, in order to understand how the middleware actually works
• Wrote your own asynchronous action creators in the format that redux-thunk expects

const getUser = (id) => {
  return async (dispatch, getState) => {
    const payload = await fetchUser(id)
    dispatch({type: 'users/addUser', payload: payload})
  }
}

If you’d like to learn more, you can read the redux-thunk documentation and visit the Redux Toolkit site to see how configureStore includes redux-thunk by default.