Book Image

Getting Started with React

By : Doel Sengupta, Manu Singhal, Danillo Corvalan
Book Image

Getting Started with React

By: Doel Sengupta, Manu Singhal, Danillo Corvalan

Overview of this book

ReactJS, popularly known as the V (view) of the MVC architecture, was developed by the Facebook and Instagram developers. It follows a unidirectional data flow, virtual DOM, and DOM difference that are generously leveraged in order to increase the performance of the UI. Getting Started with React will help you implement the Reactive paradigm to build stateless and asynchronous apps with React. We will begin with an overview of ReactJS and its evolution over the years, followed by building a simple React component. We will then build the same react component with JSX syntax to demystify its usage. You will see how to configure the Facebook Graph API, get your likes list, and render it using React. Following this, we will break the UI into components and you’ll learn how to establish communication between them and respond to users input/events in order to have the UI reflect their state. You’ll also get to grips with the ES6 syntaxes. Moving ahead, we will delve into the FLUX and its architecture, which is used to build client-side web applications and complements React’s composable view components by utilizing a unidirectional data flow. Towards the end, you’ll find out how to make your components reusable, and test and deploy them into a production environment. Finally, we’ll briefly touch on other topics such as React on the server side, Redux and some advanced concepts.
Table of Contents (18 chapters)
Getting Started with React
About the Authors
About the Reviewers

The ReactJS anatomy

Before going any further into JSX, we need to understand some basic rules to build ReactJS components. First, we're going to detail the basic methods that you've already used to create and render components. Then, we'll move to some rules to create them, and finally, we'll talk about children components.

Creating a component

In order to create a component, we need to use the React.createClass function. ReactJS components are basically classes. This method returns a ReactJS component definition that has a method named render, which is mandatory to implement. There are many other methods to configure your component and change its behavior that we are going to cover throughout the book.

This is an example of how to use the createClass and render method:

var HelloMessage = React.createClass({
  render: function() {
    return (
      <h1>Have a good day!</h1>


It's a good practice to name all the classes and components in PascalCase. In addition to...