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Package

immer

Create your next immutable state by mutating the current one

v11.1.18, 19 Aug 2026MITESM + CommonJSTypes: BundledState management
$ npm install immer
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Key numbers

As of 25 Sept 2026
Weekly downloads
46m
+202% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
0
Direct, from package.json
Last release
1 month ago
v11.1.18
GitHub stars
29k
884 forks
Open issues / PRs
31 / 22
Contributors
223
Commits, last 52 weeks
122

Downloads

Last week 2026-09-15 to 2026-09-21
020m40m60m80mSept 2025Mar 2026Sept 2026High 60.2m (25 Aug 2026)Low 11.8m (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.

45,972,855 downloads last week, 221,442,686 in the last month. The 12-month change of +202% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months
21175 in total
Latest version
11.1.18, 19 Aug 20261 month ago
First published
7 Oct 2016
Last push to GitHub
12 Sept 202612 days before the snapshot
Repository archived
No
Open issues
31
Open pull requests
22
Commits, last 52 weeks
122
Dependents on npm
6,380

Major versions

  1. v11 first release 11.0.0, 23 Nov 2025
  2. v10 first release 10.0.0, 17 Apr 2023
  3. v9 first release 9.0.0, 19 Mar 2021
  4. v8 first release 8.0.0, 17 Nov 2020
  5. v7 first release 7.0.0, 10 Jun 2020
  6. v6 first release 6.0.0, 3 Mar 2020
  7. v5 first release 5.0.0, 30 Oct 2019
  8. v4 first release 4.0.0, 11 Sept 2019
  9. v3 first release 3.0.0, 17 Apr 2019
  10. v2 first release 2.0.0, 2 Feb 2019
  11. v1 first release 1.0.0, 31 Jan 2018
  12. v0 first release 0.0.1, 7 Oct 2016

Recent releases

VersionPublished
11.1.1819 Aug 2026
11.1.1716 Aug 2026
11.1.165 Aug 2026
11.1.1516 Jul 2026
11.1.1416 Jul 2026
11.1.1316 Jul 2026
11.1.1216 Jul 2026
11.1.113 Jul 2026
11.1.103 Jul 2026
11.1.91 Jul 2026
11.1.88 May 2026
11.1.76 May 2026
11.1.64 May 2026
11.1.54 May 2026

Compatibility

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

Install

npm install immer

CDN

jsDelivr: 401.4k requests in 30 days
  • jsDelivrhttps://cdn.jsdelivr.net/npm/immer@11.1.18/
  • unpkghttps://unpkg.com/immer@11.1.18/
  • esm.shhttps://esm.sh/immer@11.1.18

Alternatives

PackageWeekly downloadsGzipLast releaseModuleComparison
mutative755.2k-1 year agoESM + CommonJSimmer vs mutative
redux-immutable540.6k-9 years agoCommonJS-

Comparisons

Related

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

Indexability: Indexed.