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Compressed walkthroughs of frameworks, languages and developer tooling, usually in about a hundred seconds.

Fireship - Fast Paced Developer Tutorials

The reference most developers actually keep open: language guide, full API listings, and runnable examples for every built in object.

A structured tour of types, generics, narrowing and module resolution for anyone moving from JavaScript to a typed codebase.

Introductory material on the event loop, modules, streams and file access for running JavaScript outside the browser.

The official interactive guide to components, state, effects and hooks, written by the team that maintains the library.

Routing, rendering, data fetching and deployment guides for the React framework, with side by side app and pages examples.