Functional programming in TypeScript
Fp-ts is functional programming in TypeScript. Licensed under MIT, it is very popular in the JavaScript ecosystem with 4.3M weekly downloads.
Fp-ts has an good overall health score of 74/100. Its strongest dimension is popularity (100/100), while maintenance (40/100) is the area with most room for improvement. This package is in good shape overall.
Effect-TS has emerged as the functional programming toolkit for TypeScript, superseding fp-ts. Downloads, mental models, error handling, concurrency, and whether the complexity is worth it.
2026-03-09T00:00:00.000ZEffect-TS vs fp-ts compared for functional programming in TypeScript. Learn about the fp-ts merger, Effect's fiber model, and when each approach makes sense in 2026.
2026-03-08T00:00:00.000Z