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Package

mem-fs

Simple in-memory vinyl file store

v6.0.0, 24 Aug 2026MITESM onlyTypes: Bundled
$ npm install mem-fs
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Key numbers

As of 25 Sept 2026
Weekly downloads
1m
+4% over 12 months
Gzip bundle size
-
No Bundlephobia data
Dependencies
2
Direct, from package.json
Last release
1 month ago
v6.0.0
GitHub stars
128
15 forks
Open issues / PRs
0 / 1
Contributors
-
Commits, last 52 weeks
482

Downloads

Last week 2026-09-15 to 2026-09-21
0500k1m1.5m2mSept 2025Mar 2026Sept 2026High 1.5m (25 Aug 2026)Low 508.9k (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.

1,014,766 downloads last week, 5,050,368 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
522 in total
Latest version
6.0.0, 24 Aug 20261 month ago
First published
6 Nov 2014
Last push to GitHub
5 Sept 202619 days before the snapshot
Repository archived
No
Open issues
0
Open pull requests
1
Commits, last 52 weeks
482
Dependents on npm
-

Major versions

  1. v6 first release 6.0.0, 24 Aug 2026
  2. v5 first release 5.0.0, 16 Aug 2026
  3. v4 first release 4.0.0, 15 Oct 2023
  4. v3 first release 3.0.0, 17 Apr 2023
  5. v2 first release 2.0.0, 22 Apr 2021
  6. v1 first release 1.0.0, 6 Nov 2014

Recent releases

VersionPublished
6.0.024 Aug 2026
5.0.016 Aug 2026
4.1.512 Jul 2026
4.1.426 Feb 2026
4.1.310 Jan 2026
4.1.212 Dec 2024
4.1.112 Oct 2024
4.1.026 Feb 2024
4.0.015 Oct 2023
3.0.017 Apr 2023
2.3.014 Feb 2023
2.2.126 May 2021
2.2.025 May 2021
2.1.030 Apr 2021

Compatibility

Module format
ESM onlyFrom package.json type, main and exports fields
TypeScript types
Bundled
Node.js engine range
>=18.0.0
Runtimes
-
Unpacked size (npm)
9.2 kB
Dependencies (2)
vinylvinyl-file
Peer dependencies (2)
@types/node@types/vinyl

Install

npm install mem-fs

CDN

  • jsDelivrhttps://cdn.jsdelivr.net/npm/mem-fs@6.0.0/
  • unpkghttps://unpkg.com/mem-fs@6.0.0/
  • esm.shhttps://esm.sh/mem-fs@6.0.0
Sources: npm registry, npm downloads API, GitHub API. Data fetched 25 Sept 2026.

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