Difference between class component and functional component : In React.js, there are two main types of components: class components and functional components. Both types of components serve the same fundamental purpose, Class Component : Class components are the older way of defining components in React. They are ES6 classes that extend the React.Component base class. Class components have a render method, which returns the JSX (JavaScript XML) that represents the component's UI. You can use lifecycle methods like componentDidMount , componentDidUpdate , and componentWillUnmount to manage component behavior and side effects. Class components can also hold and manage component states using the setState method. example : import React , { Component } from 'react' ; class MyComponent extends Component { render ( ) { return < div > Hello, I'm a class component! </ div > ; } } Functional component : Functional components are a more recent addit...
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React Js (Introduction) React.js, often referred to as React, is an open-source JavaScript library created and maintained by Facebook. It is a powerful and popular front-end framework Component-Based: React is built around the concept of reusable components. Developers create modular UI elements that can be easily composed to build complex user interfaces. This component-based architecture promotes code reusability and maintainability. Virtual DOM: React uses a Virtual DOM (Document Object Model) to optimize rendering performance. It efficiently updates only the parts of the user interface that have changed, minimizing browser reflows and improving application speed. Unidirectional Data Flow: React enforces a one-way data flow, which simplifies data management and reduces the risk of bugs. Cross-Platform: React can be used to build web applications as well as mobile applications for iOS and Android through React Native. JSX (JavaScript XML): React uses JSX, an XML-like syntax exte...