Quick Answer
What is React?
React is a JavaScript library for building fast, component-based user interfaces.
Programming
React
Also known as: ReactJS, React.js
By Glintr Editorial TeamReviewed by Glintr Learn ReviewersUpdated 5 min readArea: Programming
Definition
Created by Meta, React lets developers describe UIs as reusable components that update efficiently when data changes. Its declarative model, hooks API, and vast ecosystem make it the most widely used front-end library today.
Applications
- Single-page applications
- Progressive web apps
- Design systems and component libraries
- Cross-platform apps with React Native
Advantages
- Component reusability
- Huge ecosystem and community
- Backed by Meta
Limitations
- Requires build tooling
- Rapid ecosystem churn
Related Concepts
- JavaScriptJavaScript is the programming language of the web, running in every modern browser.
- Web DevelopmentWeb Development is the practice of building websites and web applications — front-end interfaces, back-end services and the systems that connect them.
- App DevelopmentApp Development is the practice of building software applications, most commonly for mobile devices.