microsoft/typescript
★ 111,539 stars
Covered in week 2026-W20 · the 2026-05 report
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
What typescript is
TypeScript is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to readable, standards-based JavaScript. Try it out at the playground, and stay up to date via our blog and Twitter account.
From the repository README · read it on GitHub →
Transcript
195 million downloads a week and you're still writing plain JavaScript. TypeScript adds static types that catch bugs right in your editor, before they ever reach production. Type a dot and your IDE knows exactly what you can call. That's the power of 108,000 GitHub stars backing the most adopted developer tool on the planet, trusted by Google, Airbnb, and Slack. Your refactors become safe and entire categories of bugs simply disappear. Worth a star? Link in description.