# nytimes/pourover

A library for simple, fast filtering and sorting of large collections in the browser.   There is a community-maintained fork that addresses a handful of post-NYT issues available via @hhsnopek's https://github.com/hhsnopek/pourover

Repository: https://github.com/nytimes/pourover
Canonical: https://ross.abutalabs.com/products/pourover
Language: JavaScript
License: NOASSERTION
License Family: other
Archived: true
Last push: 2015-12-16T08:13:09+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4523, "days_push": 3913, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2375, forks 112 (observed 2026-08-28T04:06:42.029016+00:00)

## What it is
PourOver is a JavaScript library for fast filtering, sorting, and composing queries over large collections (hundreds of thousands of items) entirely in the browser. It enables data-exploration apps and archives that render query results instantly without database calls.

## Use cases
- filter and sort 100,000+ items in the browser at 60fps
- build client-side data exploration apps without a backend
- compose union, intersect, and difference queries over collections
- build searchable archives or interactive newsroom features
- cache and page through large datasets in the browser

## When to choose
- you need instant client-side filtering of large datasets without server round-trips
- you want composable, memoized queries that update incrementally as data changes
- you're building a browser-based archive or data-exploration interface

## When to avoid
- you need a maintained library with active community support - the original repo is minimally maintained and a community fork exists
- your data lives on a server and you need server-side search or a real search engine
- you need modern ES module tooling - the library depends on Underscore.js and targets legacy browsers

## Facets
- artifact type: library
- maturity: maintenance
- function: search-engine, data-visualization
- domain: web-development, frontend, analytics
- platform: browser
- tags: client-side-filtering, in-browser-querying, large-collections, sorting, data-exploration, underscore, search, javascript

## Member repositories
- nytimes/pourover (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:42.029016+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 2026-08-30T02:35:03.762035+00:00, confidence not recorded.
  - readme: https://github.com/nytimes/pourover (fetched 2026-08-28T04:06:42.029016+00:00, sha a21fbd0badab)
- Data as of 2026-08-30T08:39:29.467469+00:00.