Introduction to Redux

Introduction to Redux

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1. Getting Started

In this section we will learn what Redux is, why it is useful, and most importantly when it is useful. We will also learn how to set up a basic react-redux application.

When to use Redux?

Setting up a React-Redux Application

2. Fundamental Concepts

In this section we will go through the fundamental concepts of Redux that are necessary to understand the workings of a Redux application. We will use code examples to understand the concepts and in the following section we will use them practically.

Store Dispatch Method

Redux Data Flow

3. Redux in Practice

In the previous section we looked at the basic concepts. In this section we use those basic concepts to understand some more complicated concepts and the structure of a Redux application. In the end we will also look at the Counter application to put together all the pieces of our knowledge together.

Redux Application Structure

Modifying the Template for Use

Creating the Redux Store

Creating a Slice

Understanding Slice

Using Selectors to access State

Modifying State by Dispatching Actions

Thunk Functions

Rules for Reducers

Understanding the Counter Application

4. Creating a React-Redux Application

This chapter is focused on practice hence we will utilize the knowledge we acquired in previous sections to create a practical application using Redux along with React.

The Application

Setting Up the Application

Creating the UI Skeleton

Creating the Profile Slice

Creating the Posts Slice

Completing the Posts feature

Displaying Number of Posts and Users

Adding CSS Styling

Зміст курсу

Introduction to Redux

When to use Redux?

Redux is a great tool for state management, however we should be careful about when to use it. As discussed before, it is a tool used for managing states in large applications.

Implementing Redux in a small application might not be too useful, unless we have to manage a lot of states. In larger applications we will inevitably need a proper system for managing states otherwise it will become difficult to debug and expand.

Implementing Redux in a React application is more work in the short term but pays off in the longer term in the case of larger scaled applications.

We can consider these two basic points when deciding about using Redux:

There is a considerable amount of data changing over time;
There is a need for a single source of states and a system for easily managing them.

As demonstrated in the previous chapter, we can use top-level components in React as a source of multiple shared states, but it gets unorganized and hard to maintain eventually. Redux has the upper hand in this case since it’s designed exactly for that.

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