Package

map.groupby

An ESnext spec-compliant `Map.groupBy` shim/polyfill/replacement that works as far down as ES3.

v1.0.5, 12 Sept 2025MITCommonJSTypes: NonePolyfills and shims

$ npm install map.groupby

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 2k; +180% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 4; Direct, from package.json
Last release: 1 year ago; v1.0.5
GitHub stars: 1; 1 forks
Open issues / PRs: 1 / 0
Contributors: -
Commits, last 52 weeks: 1

Downloads

Last week 2026-09-15 to 2026-09-21

Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

1,985 downloads last week, 10,878 in the last month. The 12-month change of +180% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: -
Latest version: 1.0.5, 12 Sept 20251 year ago
First published: -
Last push to GitHub: 30 Dec 2025269 days before the snapshot
Repository archived: No
Open issues: 1
Open pull requests: 0
Commits, last 52 weeks: 1
Dependents on npm: 3

Major versions

Recent releases

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: None
Node.js engine range: >= 0.4
Runtimes: -
Unpacked size (npm): 18 kB
Dependencies (4): es-mapcall-bindes-abstractdefine-properties

Install

npm install map.groupby

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/map.groupby@1.0.5/
unpkghttps://unpkg.com/map.groupby@1.0.5/
esm.shhttps://esm.sh/map.groupby@1.0.5

Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Not indexed (discovery only): downloads_week 1985 < 10000.