Package

is-error

Detect whether a value is an error

v2.2.2, 16 Apr 2019MITCommonJSTypes: None

$ npm install is-error

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 660k; +34% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 7 years ago; v2.2.2
GitHub stars: 15; 1 forks
Open issues / PRs: 0 / 0
Contributors: -
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.

659,951 downloads last week, 2,732,452 in the last month. The 12-month change of +34% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 05 in total
Latest version: 2.2.2, 16 Apr 20197 years ago
First published: 8 Mar 2015
Last push to GitHub: 16 Apr 20192,718 days before the snapshot
Repository archived: No
Open issues: 0
Open pull requests: 0
Commits, last 52 weeks: 0
Dependents on npm: -

Major versions

v2 first release 2.0.0, 8 Mar 2015

Recent releases

Version	Published
2.2.2	16 Apr 2019
2.2.1	21 Oct 2016
2.2.0	16 May 2015
2.1.0	10 May 2015
2.0.0	8 Mar 2015

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: None
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): 6.1 kB
Dependencies (0): None

Install

npm install is-error

CDN

jsDelivrhttps://cdn.jsdelivr.net/npm/is-error@2.2.2/
unpkghttps://unpkg.com/is-error@2.2.2/
esm.shhttps://esm.sh/is-error@2.2.2

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

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