React JS | Introduction

Hello everyone! I am happy to have started an exciting journey of React.js with the guidance of Bikash Karki experts at Nepal Mega College. Let’s learn and grow together in this dynamic area of website development. Join me as I explore React.js

React is a very useful component when creating web applications. React.js is one of the most popular free and open-source JavaScript Library. It was developed by Facebook team on 2012 . It was first deployed on Facebook's news feed and later on Instagram.

Why React JS

React is a tool for building UI components.

React Gives the component based architecture:

• component based architecture is a design and development approach that focuses on turning elements into separate reusable components.

Virtual DOM:

• The virtual DOM in React.js is a lightweight copy of the real DOM that React uses to optimize updates.
• When changes occur, React updates the virtual DOM first, compares it with the previous version to find differences, and then efficiently updates only the changed parts in the real DOM.
• This process improves performance by minimizing direct DOM manipulations.

Support JSX

• JSX allow developers to write HTML syntax within JavaScript, so code is more ridable.

html syntax like : 
    <div>
       <h1>Hello World</h1>
    </div>
        

It is declarative programming:

• Declarative programming is a non-imperative style of programming in which programs describe their desired results without explicitly listing commands or steps that must be performed.

It support single page application:

• Single Page Application is a web application that loads a single HTML page and dynamically updates the content as the user interacts with it. It allows users to use websites without loading whole new pages from the server, which increase the performance and more dynamic experience.