Introduction

• React is a declarative, efficient, flexible and a open-source JavaScript library for building user interfaces.
• React lets you compose complex UIs from small and isolated pieces of code called “components”.
• React is used to build single-page applications.

History

• React was created by Jordan Walke (S.E. at Facebook).
• It’s early prototype was called “FaxJS”.
• React was first deployed on Facebook’s News Feed in 2011 and later it was used in Instagram in 2012.
• It was open-sourced at JSConf US in May 2013.

Why should we use react?

• It help us making single page applications easily.
• Its components make code reusable and it also improves codes readability.
• It can be used on server side as well as on client side.
• It uses virtual DOM, which is faster then regular DOM, and it makes app faster.

Prerequisites

• JavaScript/ECMAScript 2015
• HTML5
• CSS