# remeda/remeda

A utility library for JavaScript and TypeScript.

Repository: https://github.com/remeda/remeda
Canonical: https://ross.abutalabs.com/products/remeda
Homepage: http://remedajs.com
Language: TypeScript
License: MIT
License Family: permissive
Topics: typescript, utility, functional, programming
Last push: 2026-08-26T13:42:33+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 3040, "days_push": 7, "days_rel": 8, "gap_med": 3, "n_releases_24m": 78}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5419, forks 170 (observed 2026-08-28T04:09:17.886668+00:00)

## What it is
Remeda is a utility library for JavaScript and TypeScript offering everyday helper functions for arrays, objects, and more. It is written entirely in TypeScript and supports both data-first and data-last (curried) calling styles with lazy pipe evaluation.

## Use cases
- replace lodash with a fully typed utility library
- functional programming utilities for TypeScript
- pipe and curry array transformations
- type-safe array and object manipulation
- tree-shakable utility functions for bundlers
- migrate from lodash or ramda

## When to choose
- you write TypeScript and want precise, deeply integrated types
- you want both data-first and curried data-last styles
- you need tree-shakable ESM/CJS utilities
- you want lazy evaluation with pipe

## When to avoid
- you need a huge breadth of utilities like lodash
- your project is plain JavaScript with no type checking
- you depend on lodash-specific plugins or ecosystem

## Facets
- artifact type: library
- maturity: active
- function: developer-tools
- domain: developer-tools, web-development, frontend, programming-languages
- platform: bun, cross-platform
- tags: typescript, functional-programming, utility-functions, lodash-alternative, ramda-alternative, tree-shakable, data-first, data-last, currying, pipe, nodejs, deno

## Member repositories
- remeda/remeda (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:17.886668+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:56:56.995417+00:00, confidence not recorded.
  - readme: https://github.com/remeda/remeda (fetched 2026-08-28T04:09:17.886668+00:00, sha 09290f6eea65)
  - homepage: http://remedajs.com (fetched 2026-08-29T08:52:37.562375+00:00, sha aee52720b7a3)
  - site_page: https://remedajs.com/docs (fetched 2026-08-29T08:52:37.571585+00:00, sha 99770200a200)
- Data as of 2026-08-30T08:39:29.467469+00:00.