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Package

opossum

A fail-fast circuit breaker for promises and callbacks

v10.0.0, 24 Jun 2026Apache-2.0-Types: NonePromises and async control flow
$ npm install opossum
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Key numbers

As of 25 Sept 2026
Weekly downloads
845k
+192% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
0
Direct, from package.json
Last release
3 months ago
v10.0.0
GitHub stars
1.7k
113 forks
Open issues / PRs
8 / 2
Contributors
-
Commits, last 52 weeks
15

Downloads

Last week 2026-09-15 to 2026-09-21
0500k1m1.5mSept 2025Mar 2026Sept 2026High 1.3m (14 Jul 2026)Low 231.5k (23 Dec 2025)
Weekly npm downloads, one point per week, weeks starting 23 Sept 2025 to 15 Sept 2026. The y axis starts at zero.

845,003 downloads last week, 4,646,481 in the last month. The 12-month change of +192% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
168 in total
Latest version
10.0.0, 24 Jun 20263 months ago
First published
1 Nov 2016
Last push to GitHub
21 Aug 202634 days before the snapshot
Repository archived
No
Open issues
8
Open pull requests
2
Commits, last 52 weeks
15
Dependents on npm
-

Major versions

  1. v10 first release 10.0.0, 24 Jun 2026
  2. v9 first release 9.0.0, 5 Jun 2025
  3. v8 first release 8.0.0, 25 May 2023
  4. v7 first release 7.0.0, 13 Oct 2022
  5. v6 first release 6.0.0, 18 Mar 2021
  6. v5 first release 5.0.0, 20 Feb 2020
  7. v4 first release 4.0.0, 21 Aug 2019
  8. v3 first release 3.0.0, 26 Jul 2019
  9. v2 first release 2.0.0, 5 Jun 2019
  10. v1 first release 1.0.0, 6 Apr 2017
  11. v0 first release 0.1.0, 1 Nov 2016

Recent releases

VersionPublished
10.0.024 Jun 2026
9.0.05 Jun 2025
8.5.029 May 2025
8.4.027 Nov 2024
8.3.111 Nov 2024
8.3.028 Oct 2024
8.2.023 Oct 2024
8.1.430 Apr 2024
8.1.36 Nov 2023
8.1.25 Oct 2023
8.1.113 Sept 2023
8.1.01 Aug 2023
8.0.131 May 2023
8.0.025 May 2023

Compatibility

Module format
-Not determined from package.json
TypeScript types
None
Node.js engine range
^26 || ^24 || ^22
Runtimes
-
Unpacked size (npm)
383 kB
Dependencies (0)
None

Install

npm install opossum

CDN

  • jsDelivrhttps://cdn.jsdelivr.net/npm/opossum@10.0.0/
  • unpkghttps://unpkg.com/opossum@10.0.0/
  • esm.shhttps://esm.sh/opossum@10.0.0
Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

Indexability: Indexed.