Package

is-extendable

Returns true if a value is a plain object, array or function.

v1.0.1, 11 Sept 2017MITCommonJSTypes: Bundled

$ npm install is-extendable

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 53.8m; +4% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 1; Direct, from package.json
Last release: 9 years ago; v1.0.1
GitHub stars: 19; 5 forks
Open issues / PRs: 0 / 1
Contributors: 4
Commits, last 52 weeks: 0

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.

53,768,367 downloads last week, 211,984,265 in the last month. The 12-month change of +4% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 04 in total
Latest version: 1.0.1, 11 Sept 20179 years ago
First published: 29 Jun 2015
Last push to GitHub: 20 Aug 20211,861 days before the snapshot
Repository archived: No
Open issues: 0
Open pull requests: 1
Commits, last 52 weeks: 0
Dependents on npm: 739

Major versions

v1 first release 1.0.0, 20 Jul 2017
v0 first release 0.1.0, 29 Jun 2015

Recent releases

Version	Published
1.0.1	11 Sept 2017
1.0.0	20 Jul 2017
0.1.1	4 Jul 2015
0.1.0	29 Jun 2015

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: >=0.10.0
Runtimes: -
Unpacked size (npm): -
Dependencies (1): is-plain-object

Install

npm install is-extendable

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/is-extendable@1.0.1/
unpkghttps://unpkg.com/is-extendable@1.0.1/
esm.shhttps://esm.sh/is-extendable@1.0.1

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

Indexability: Not indexed (discovery only): no category.