React Introduction — Learn Step by Step

Akash Gadhiya
2 min readSep 28, 2021


React Introduction — Learn Step by Step

React is a library for building fast and beautiful web applications. Jordan Walke was the author of React. He was a software engineer at Facebook. Today we will learn and understand React Introduction step by step.

Let’s start with React Introduction.

React Introduction

React is a JavaScript library. It was created and maintained by Facebook. Also used for building User Interfaces. React was initially released on May 29, 2013. It was written in JavaScript.

Prerequisite for React

Before starting with React, you should know the following areas:

  1. HTML
  2. CSS
  3. JavaScript

It is good to have additional knowledge:

  1. How does the browser render the DOM?
  2. Basic SCSS / CSS materials such as box model, position, etc.
  3. JavaScript core concepts. Ex- Hosting, Call, Apply, Bind, Higher-Order Function, Closure, and Object-Oriented JavaScript.
  4. The basic concept of web apps. Ex — Ajax, SPA (single page Application), responsive web pages, etc.

Longer Definition for React

React is only responsible for the view layer of an application. It means that it is only responsible for rendering UI (User Interface). Such as text, list, buttons, links, etc. React supports live reloading browser, as well as updating whenever the UI changes.

For example, you are creating an e-commerce website. You want to maintain the number of selected items in the shopping bag. Users will add and remove items from the bags.

You can simplify it in React. The number of selected items show in a shopping bag like {selectedItems.length}. React will display it and update it whenever it changes.

React is NOT a Framework

React is a library, not a framework.

The difference between a library and a framework is:

  1. The library helps you on only one side
  2. The framework helps you on many sides

Read Also:

Thank You.



Akash Gadhiya

I enjoy using my obsessive attention to detail, my unequivocal love for making things, and my mission-driven work ethic to literally change the World.