A Beginner Guide to React JS

In recent times, The popularity of the React JS framework has increased incredibly. It is used by the leading IT companies based on its advantages. React JS is a declarative and efficient Javascript framework.

The React framework is a resourceful tool to create user interfaces. It enables the development of dynamic, interactive user interfaces with flexibility and ease. This article is the beginner guide to know and learn about React JS.

React JS

In simple terms, React JS is an open-source front-end JavaScript library. It is maintained by Facebook and a community of individual developers and companies. React is widely used as a base in building single-page websites and mobile applications. It is very easy to use and to create a reusable UI/UX.

Features of React JS

  • JavaScript Syntax Extension: JSX is one of the good features and an extension to javascript. It is the coimbation of HTML and JavaScript. It is easy to use and understandable.
  • Components: The web page is divided into multiple components using React JS.each component is a part of the UI design which has its own logic and design. It is like pure javascript functions. Components can be used as functions and classes.It splits the logic into reusable independent code. It has a state, props which makes easy implementation.
  • Virtual DOM: React uses virtual DOM instead of real DOM to increase the application speed. It is an in-memory data -structure cache.DOM stands for document object model. It is an exact copy of the real DOM.
  • Performance: As React uses virtual DOM, It updates only the modified parts, DOM executes in memory and creates separate components. So that leads to faster development and increased performance.
  • One-way data binding: Based on the name, it is a one-direction flow. The data in react flows only in one direction which means from top to bottom. From the parent components to child components, the data flows. This is the working process and keeps everything modular and fast.
  • Extension: React has many extensions to create full-fledged UI applications. It supports mobile app development and server-side rendering. React is extended with Flux, Redux, React Native, etc.
  • Simplicity: It is component-based and makes the code reusable. React JS uses JSX that makes code easy to understand and debug with less code.
  • Conditional Statements: JSX allows us to write conditional statements. According to the conditions, the data in the browser is displayed.

Need to learn React JS

  • Based on the declarative syntax, React is a simpler way of learning and developing applications.
  • Basically It is faster to develop with quick, easy, and less room for human error.React uses “Learn once, write anywhere”.
  • After understanding the basic architecture, React can be used to develop fully functioning apps for both Android and iOS.
  • React has a massive community to maintain and grow the open-source library. It has great tools like React Profiler and React devtools.
  • With components, React saves time and money on development. It allows us to build dynamic user interfaces.
  • React is the friendly open source JavaScript library for SEO purposes to crawl Google. It makes full use of JS’s capabilities.
  • Compared to other libraries, React is easy to learn,use and debug. It is used by many famous companies. React JS is used to develop rich UI for both desktop and mobile apps.

Installation of React JS

Let’s see the steps to set up an environment for the successful development of ReactJS applications. Prerequisite
  • NodeJS and NPM(Node Package Manager)
  • React and React DOM
  • Webpack
  • Babel
NodeJS is the platform needed for the React JS development. First install Node JS, then start installing React using npm. Install ReactJS in two ways
  • Using webpack and babel.
  • Using the create-react-app command.
Webpack is a module bundler that takes dependent modules, manages, loads and compiles them to a single file. Use this file and develop apps using command line or, configuring using webpack.config file. Babel is a JavaScript compiler and transpiler. It converts one source code to another on all browsers.

React Components

Basically, React Component is the core building block of React. It makes the task of building UIs much easier. React component helps to render its user interface and update it. It also manages the events that belong to its user interface. The three important concepts of React component are
  • Properties − To receive input.
  • Events − To manage DOM events.
  • State − To stay as a stateful component.

Types of React components

Functional Components: These are simply javascript functions that may or may not receive data as parameters. Class Components: The Class components can be created using JavaScript ES6 class and can pass data between class components.

Introduction to JSX

JSX is a JavaScript Extension Syntax and the core concept of React.It is used to write HTML and JavaScript together easily. It is faster as it performs optimizations and easier to create templates.

React Training

To master React JS, learn from scratch to lay a strong foundation and develop the skills using real time practices. Get professional help to follow the right track. Job oriented learning is effective as it assists in building a successful career path. Credo Systemz React Training in Chennai is the best choice that fulfills the above criteria. It helps the aspirants to land in their dream IT job.


To sum up, React JS is one of the popular frameworks with a lot of job opportunities. This article explains the importance of react JS, its features, basics and much more. Enroll in React JS Training in Chennai and update your career with much more career opportunities.

Related Tags

Trending Courses

DevOps Training in Chennai | Salesforce Training in Chennai | Machine Learning Training in Chennai | Python Training in Chennai | Primavera Training in Chennai | PMP Training in Chennai | AWS Training in Chennai | Full Stack Developer Course in Chennai | Selenium Training in Chennai