Book Image

Building Enterprise JavaScript Applications

By : Daniel Li
Book Image

Building Enterprise JavaScript Applications

By: Daniel Li

Overview of this book

With the over-abundance of tools in the JavaScript ecosystem, it's easy to feel lost. Build tools, package managers, loaders, bundlers, linters, compilers, transpilers, typecheckers - how do you make sense of it all? In this book, we will build a simple API and React application from scratch. We begin by setting up our development environment using Git, yarn, Babel, and ESLint. Then, we will use Express, Elasticsearch and JSON Web Tokens (JWTs) to build a stateless API service. For the front-end, we will use React, Redux, and Webpack. A central theme in the book is maintaining code quality. As such, we will enforce a Test-Driven Development (TDD) process using Selenium, Cucumber, Mocha, Sinon, and Istanbul. As we progress through the book, the focus will shift towards automation and infrastructure. You will learn to work with Continuous Integration (CI) servers like Jenkins, deploying services inside Docker containers, and run them on Kubernetes. By following this book, you would gain the skills needed to build robust, production-ready applications.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
The Importance of Good Code

Converting to Redux

Let’s start by installing Redux:

$ yarn add redux

There’s also an official React binding that provides the connect method that helps you connect a component to the store:

$ yarn add react-redux

You may also want to install the Redux DevTools ( as it'll make debugging with Redux much easier.

Creating the store

As mentioned previously, the entire state of the application is stored as a single object inside a construct called the store. The store is central to a Redux application, so let’s create it. Inside src/index.jsx, add the following lines:

import { createStore } from 'redux';

 const initialState = {};
 const reducer = function (state = initialState, action) {
   return state;
 const store = createStore(reducer, initialState);

The createStore method accepts three parameters:

  • reducerfunction: A function that takes in the current state and an action, and uses them to generate a new state.
  • initialStateany: The initial state. The initialState...