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

Component properties

In the Chapter 2, Exploring JSX and ReactJS Anatomy, we talked a lot about ReactJS properties and used them throughout our examples, but so far, we've just used them like HTML properties. They play a role that is far beyond that. It's common to use them to pass data through your components tree that defines your view; to pass configuration properties that come from parent components; to pass callbacks for user input, UI/custom events that need to be triggered outside, and so on.

Properties of a ReactJS component can't be changed once the component is rendered in the DOM.

Properties define the declarative interface of the component. In a h1 element that renders a name property, for example, you can't change this name once it's rendered, unless you create another instance of the component and render it in the same place in the DOM, replacing the old rendered component.

var GreetingsComponent = React.createClass({
  render: function() {
    return (