JavaScript With Syntax For Types
A strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.
Microsoft's 2012 attempt to make JavaScript survivable at scale: a typed superset that compiles down to plain JS. Types are structural and inferred, so most code needs few annotations, yet entire bug classes disappear at compile time. It won: Angular, Vue 3, Next.js and most modern libraries are written in it, and it took the #1 spot on GitHub in 2025 (Octoverse), overtaking both Python and JavaScript. For any team beyond a prototype, it is the default choice.
Who it's for
JavaScript teams who want static types to scale codebases with confidence.
Official links
Keep exploring
95 in catalog
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