caolan/highland

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

3430 stars · 145 forks observed · 2026-08-28

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

Highland is a high-level streams library for Node.js and the browser that unifies synchronous and asynchronous data sources behind a single stream abstraction. It provides functional-style transforms (map, filter, reduce) over values distributed in time, interoperating with Node streams, promises, callbacks, and event emitters.

Use cases

• process async data with functional map/filter/reduce
• unify promises, callbacks, and event emitters into one stream API
• backpressure-aware streaming pipelines in Node.js
• transform Node.js streams with lodash-like utilities
• handle large files or event streams without loading everything into memory
• switch between sync and async data sources without rewriting code

When to choose

• you want a functional utility belt for Node streams and async iteration
• you need to mix synchronous and asynchronous sources in one pipeline
• you want backpressure handling without manual plumbing
• you need browser and Node.js support in one library

When to avoid

• you're starting a new project - consider modern async iterators or RxJS/observables
• you need actively maintained software with recent releases
• you only need simple promise-based async flows without streaming
• you need reactive features like time-based operators or subject semantics

Facets

library · maturity maintenance

streaming concurrency developer-tools developer-tools web-development browser streams functional-programming async node-streams transducers real-time nodejs javascript

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