Gain insights into Redux, an open-source library for managing app state. Learn about Redux store creation, middleware, state management, error handling, testing, and building robust applications.

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Redux

In this course, you will take a deep dive into Redux, an open-source JavaScript library for managing application state.

You will start by running through what Redux is, general concepts, and basic implementation. With the basics out of the way, you will begin working on building a recipe book application, adding more bells and whistles to it as the course progresses. You will learn to create a Redux store, how to work with middleware, state management, error handling, testing, and a whole lot more.

By the end, you will have advanced knowledge of one the most popular libraries among React and Angular developers. You will have the skills to create highly performant and consistent.

The Ultimate Guide to Redux

One of the main strengths of Redux is the separation of state (data) management from the presentation and logic layers. The design of the state layout can be performed separately from the design of the UI and any complex logic flows due to the  division of responsibilities.

To illustrate this concept of separation, let’s consider our recipe book application. The app can manage multiple recipe books, each having multiple recipes. A recipe, in turn, is an object containing a list of ingredients, preparation instructions, images, a favorite flag, etc.:

~~~~~~~
const state = {
  books: [
    {
      id: 21,
      name: 'Breakfast',
      recipes: [
        {
          id: 63,
          name: 'Omelette',
          favorite: true,
          preparation: 'How to prepare...',
          ingredients: [...]
        },
        {...},
        {...}
      ]
    },
    {...},
    {...}
  ]
};
~~~~~~~

This state layout contains all the required information and conforms exactly to the description of our application. However, it requires complex nested reducers, and access to deeply nested data is complicated. While still workable, these problems lead to convoluted code. 

Let's explore both of them in detail in the following lessons.

In this lesson, we introduce state management and why it is necessary.

Introduction to Redux

Basic Redux Implementation

Cloning a Redux Boilerplate

Complete Redux Project

Creating a Store

Decorating the Store

Actions and Action Creators

Redux Thunk

Redux-Actions Library

Reducers

Avoiding Mutations

Introduction to Middleware

Your First Middleware

Middleware

State Management

Keeping a Normalized State

Persistence State

Real-World State

Server Communication

Moving Code from Action Creators

Error Handling

Server Communication II

Transforming Data

Chaining Requests

Managing Side Effects

Messaging Patterns

WebSockets

WebSocket Authentication

Testing

Testing Action Creators

Async Action Creators

Testing Reducers

Testing Middleware

Testing Async Middleware

Integration Tests

Evolution Of Redux

Final Assessment

Introduction