Discriminated unions are the most important TypeScript feature, and everyone should be using them more.

Added to korrents 17 Sept 2026 · How quotes work · Something wrong? Tell us

Shared subject first, then similar wording. They may agree or disagree.

• A programming language is a ten-year play: version one has issues, version two fixes them, version three is finally good — and only then does adoption start. AHAnders Hejlsberg13 May 2026TypeScript
• A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come. AHAnders Hejlsberg13 May 2026TypeScript
• Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer. AHAnders Hejlsberg13 May 2026TypeScript
• For a TypeScript team, Rust belongs on the backend — API servers — and not in the front end. ARAlice Ryhl20 May 2026TypeScript
• If you can use Effect for TypeScript, you should -- to the point of not starting a new project without it. DMDillon Mulroy9 Jan 2026TypeScript

See this claim on the map