Book Image

Learning Redux

By : Daniel Bugl
Book Image

Learning Redux

By: Daniel Bugl

Overview of this book

The book starts with a short introduction to the principles and the ecosystem of Redux, then moves on to show how to implement the basic elements of Redux and put them together. Afterward, you are going to learn how to integrate Redux with other frameworks, such as React and Angular. Along the way, you are going to develop a blog application. To practice developing growing applications with Redux, we are going to start from nothing and keep adding features to our application throughout the book. You are going to learn how to integrate and use Redux DevTools to debug applications, and access external APIs with Redux. You are also going to get acquainted with writing tests for all elements of a Redux application. Furthermore, we are going to cover important concepts in web development, such as routing, user authentication, and communication with a backend server After explaining how to use Redux and how powerful its ecosystem can be, the book teaches you how to make your own abstractions on top of Redux, such as higher-order reducers and middleware. By the end of the book, you are going to be able to develop and maintain Redux applications with ease. In addition to learning about Redux, you are going be familiar with its ecosystem, and learn a lot about JavaScript itself, including best practices and patterns.
Table of Contents (13 chapters)

Creating higher-order functions

There are two kinds of higher-order functions:

  • Functions that take a function as an argument (for example, a callback pattern)
  • Functions that return a function as their result

So, higher-order functions are simply functions that deal with functions. Higher-order reducer functions (also called higher-order reducers) are functions that wrap (take and return) reducer functions. We will talk more about these later.

Functions as arguments

The first type of higher-order functions are functions that take other functions as arguments:

function someFn (fn) { ... }

You might be familiar with this from the callback pattern, which used to be very common when working with asynchronous JavaScript. We pass...