web development / react

React, Free

The most popular frontend library in the world, and the one most job listings ask for. Learn it from the official docs — which are genuinely excellent — and a roadmap to see the wider ecosystem. All resources free and current.

React is the dominant way to build interactive user interfaces, and it's the single most in-demand frontend skill. Make sure your JavaScript is solid first, then learn React itself — the modern official docs (react.dev) are interactive, hooks-first, and the best starting point there is. Use the roadmap to understand the surrounding ecosystem (routing, state, frameworks like Next.js).