What is React and why use it What is React? Definition: React is a free and open-source JavaScript library developed by Facebook for building user interfaces, especially single-page applications (SPAs), where data changes frequently over time. Core Concept: React allows developers to create large web
Functional components and props Functional components are the most common and modern way to build UI in React. They are simple JavaScript functions that return JSX and describe what the UI should look like. Props, short for “properties,” allow data to be passed from a
Introduction to React Hooks React Hooks are functions that let you use state and other React features in functional components. They were introduced to simplify component logic and eliminate the need for class-based components in most cases. Why Hooks Were Introduced Before Hooks, state and
Controlled vs uncontrolled components Controlled and uncontrolled components are two approaches to handling form inputs and user data in React. Understanding their differences is key to managing form state effectively and building predictable user interfaces. What Are Controlled Components Controlled components have their form data
Installing and configuring React Router React Router is a popular library for managing navigation and routing in React applications. It enables developers to create single-page applications (SPAs) with multiple views and URL-based navigation. Installing React Router To start using React Router, you need to install
Lifting State up Lifting state up in React refers to the practice of moving shared state to the closest common ancestor of components that need to access or modify that state. It allows sibling components to communicate and remain synchronized through a shared parent. Why
Fetching data using fetch and Axios Data fetching is a core part of building dynamic web applications. In React, two common approaches for making HTTP requests are the native fetch API and the third-party library Axios. Both allow you to retrieve data from external sources
Code splitting with React.lazy and Suspense Code splitting is a performance optimization technique that breaks your React application into smaller bundles, loading only the code needed for the current view. This improves initial load times and overall app responsiveness. What Is React.lazy React.lazy is a
Building React apps for production Building React apps for production involves optimizing performance, reducing bundle size, and preparing your app for deployment using tools and configurations that ensure fast, efficient, and secure delivery to users. Key Steps in Production Builds Use npm run build or
Unit testing with Jest Unit testing with Jest in React involves testing individual components or functions in isolation to ensure they work as expected. Jest is a popular JavaScript testing framework developed by Meta, and it’s commonly used with React for its simplicity, speed, and