What Is React?
Website BuilderReact is the most widely-used JavaScript library for building user interfaces, developed and maintained by Meta. It introduced a component-based architecture and a virtual DOM for efficient updates. React powers millions of websites and applications, often paired with frameworks like Next.js, Remix, or Gatsby.
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How Websites Using React Work
- Declarative, component-based UI architecture
- Virtual DOM for efficient diffing and DOM updates
- Unidirectional data flow with state and props
- Massive ecosystem of hooks, libraries, and tools
- JSX syntax combining JavaScript and HTML-like markup
- Used both as a single-page app library and with SSR frameworks
How Our Detector Identifies React
Our scanner analyzes multiple layers of a website's technical fingerprint to detect React usage.
- react.development.js or react.production.min.js in page scripts
- __REACT_FIBER_TRACING__ or __reactFiber attributes in DOM
- React DevTools hook detection in window object
- Technology stack entry listing React as the framework
- JSX-compiled output patterns in page JavaScript bundles
Websites Built With React
Real sites detected by our scanner
Related Tools & Technologies
Other website builders and platforms we detect