Ramda
A JavaScript utility library for writing functional-style code without changing your data.
- Stars
- 24.1k
- Forks
- 1.5k
- Licence
- MIT
- Language
- JavaScript
- Last update
- 25 days ago
- Type
- Library
What it is
Ramda is a JavaScript library of helper functions for transforming data in a functional style. Its functions are automatically curried and take the data as the last argument, so you can chain small functions into pipelines. It is designed so that it never mutates the data you pass in.
- Transforming arrays and plain objects with map, filter and reduce-style helpers
- Building reusable functions by partially applying arguments to Ramda functions
- Composing a sequence of simple functions that each pass data to the next
- Loading Ramda directly in a browser page with a script tag
Great for
- JavaScript developers who want to write functional-style data transformations
- Teams that prefer immutable data handling and small composable functions
- Developers building function pipelines from simpler functions
- Projects that can install an npm package and use modern JavaScript modules
Not ideal for
- Developers who want a general-purpose toolkit mixing paradigms; the README says Ramda is focused on functional style specifically
- Beginners who are not yet comfortable with functions as values, since currying and composition take practice to read
- Projects that need the library to enforce immutability; the README says Ramda does not enforce it
How to get it
- 1
Install with a package manager
You'll need: Node.js
Install from npm
npm install ramda - 2
Run it
- Run npm install ramda in your project
- Import the library in your code with import * as R from 'ramda'
- Call a function such as R.map(identity, [1, 2, 3]) to confirm it works
- Browse the API documentation at https://ramdajs.com/docs/ for other functions
- 3
Get the most out of it
- Import only the functions you need, or use a bundler with tree-shaking, to reduce bundle size
- Use the partial build command from the README to create a smaller custom file with selected functions
- Browse the Cookbook wiki for functions built from Ramda
- Pin an exact version in browser script tags rather than using latest
Downloads
Strengths
- Functions are automatically curried, which makes building new functions from old ones straightforward
- Data is supplied last in arguments, which the README says supports pipeline-style code
- Published as an npm package with browser, Deno and ES module builds
Trade-offs
- Functional style with currying can be harder to read for developers new to the approach
- The README notes that using the 'latest' CDN link risks breaking changes, so versions should be pinned
- Tree-shaking results depend on the bundler and setup, according to the README
How it compares
| Project | Stars | Type | Level | Updated | Best for |
|---|---|---|---|---|---|
| ramda (this) | 24.1k | Library | intermediate | 25 days ago | JavaScript developers who want to write functional-style data transformations |
| immutable-js | 33k | Library | intermediate | 5 days ago | JavaScript developers managing application state that is updated often |
Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.