paldepind/flyd

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1565 stars · 82 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Flyd is a minimalistic, modular functional reactive programming library for JavaScript built around composable observable streams. Its core is under 200 SLOC and exposes curried, functional-style operators with support for transducers and the Fantasy Land monad specification.

Use cases

• manage values that change over time reactively in JavaScript
• combine event streams from clicks or inputs without heavy frameworks
• build custom reactive abstractions on a tiny stream core
• use transducers with Ramda to transform streams
• replace RxJS with a smaller, more functional FRP library

When to choose

• you want a tiny, transparent FRP core you can fully understand
• you prefer curried functional operators over method chaining
• you need modular extensibility and atomic updates
• bundle size and simplicity matter more than ecosystem size

When to avoid

• you need a large ecosystem of operators and community support like RxJS
• you want built-in scheduling, backpressure, or concurrency primitives
• you need TypeScript-first tooling or active ongoing development
• you are building modern apps where signals or RxJS are already available

Facets

library · maturity maintenance

state-management web-development frontend developer-tools browser cross-platform frp reactive-programming streams functional-programming observables nodejs

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