A JavaScript library for building user interfaces, developed by Meta. It lets you compose UIs from reusable components, manage state declaratively, and update the DOM efficiently through a virtual representation. React is the foundation of countless web applications and the entry point to the modern front-end ecosystem.
React is a JavaScript library for building user interfaces from small, reusable pieces called components. It was created at Facebook (now Meta) and released in 2013. The core idea is simple: instead of manipulating the browser’s DOM directly, you describe what the UI should look like for a given state, and React handles the updates….
Before you write a single line of React, you need a place to run it. React is a JavaScript library, and JavaScript needs a runtime. The browser provides one, but the development workflow — running a dev server, installing dependencies, running tests — happens outside the browser. That is where Node.js and the package managers…
Vite is the build tool that the React ecosystem now recommends for new projects. It was created by Evan You, the creator of Vue, and it replaces the older Create React App (CRA) tooling that was the standard for years. The difference is dramatic: CRA’s dev server takes roughly 15 seconds to start, while Vite’s…
A React project is not just a folder of JavaScript files. It is a structure with defined roles: the entry point, the root component, the assets, the configuration, and the build output. Knowing where each piece lives — and why — is the difference between a project you can navigate and one you spend hours…
JSX is the syntax that lets you write markup inside JavaScript. It looks like HTML, but it is not HTML. It is a syntax extension that the compiler transforms into JavaScript function calls. Every React component returns JSX. Every React application is built from JSX. Understanding the rules of JSX is the first step to…