What is React?
A JavaScript library for building user interfaces from composable components — the most-used frontend library in 2026.
React, released by Facebook in 2013, introduced the component model that defines modern frontend development: build small reusable pieces (components), compose them into bigger ones, and let React efficiently update the DOM when state changes. React itself is a library, not a framework — most production React apps use Next.js (the dominant React framework) or Remix to handle routing, data fetching, and server rendering. InBuild generates React components and exports them as Next.js projects.