Redux in Action

Chapter 5. Middleware

This chapter covers

• Defining what Redux middleware is
• Writing your own middleware
• Composing middleware
• Learning when to use middleware

We’ve covered most of the usual suspects you’d find in a React/Redux application: actions, reducers, and the store. To update a state in your application using Redux, you need all three. You have one more core actor that’s key to this whole operation: middleware. If you’ve spent any time in chapter 4, you’ve already come face-to-face with middleware and lived to tell the tale. When you added redux-thunk to the Parsnip project, you learned how to apply middleware to Redux using the applyMiddleware function, but not necessarily how to create your own. In this chapter, we’ll look more in ...