flow-typed/flow-typed

Health v2 · maintenance only

Adoption not part of the score

3757 stars · 1310 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A central repository of high-quality third-party Flow library type definitions (libdefs), plus a CLI tool to install and manage them in Flow projects. It lets Flow type-check code that uses untyped third-party JavaScript libraries.

Use cases

• install flow type definitions for third-party libraries
• type-check untyped npm packages with flow
• find libdefs for a javascript library
• write and contribute flow library definitions
• keep flow typedefs up to date with package versions

When to choose

• your project uses Flow and depends on libraries not written in Flow
• you want typed auto-complete and error checking for third-party modules
• you need a maintained source of community Flow libdefs

When to avoid

• your project uses TypeScript instead of Flow
• you only use libraries that ship their own Flow types
• you need active feature development rather than maintenance

Facets

library · maturity maintenance

type-system cli developer-tools developer-tools programming-languages cli cross-platform flow flowtype libdefs type-definitions npm javascript nodejs

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