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

Exploring the state property

In the last chapter, we explored React properties (props). Just as components can have properties, they can also have states. States are primarily set to those components where it is necessary to change, for example if the component has to be updated or replaced in future. Thus, it is not mandatory to have a state for the entire component.

Components can be both stateless and stateful:

  • Stateless components are those where only props are present, but no state is defined. Thus, there will no change in these prop values for these components within the component life cycle. The only source of static data should be presented to the component instance via the props. Thus, props are immutable data for a React component.

  • Stateful components: Stateless components, are meant to represent any React component declared as a function that has no state and returns the same markup given the same props. As the name implies, stateful components are those where both props and states...