Package

side-channel

Store information about any JS value in a side channel. Uses WeakMap if available.

v1.1.1, 8 Jun 2026MITCommonJSTypes: Bundled

$ npm install side-channel

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 127.5m; +127% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 5; Direct, from package.json
Last release: 3 months ago; v1.1.1
GitHub stars: 17; 9 forks
Open issues / PRs: 0 / 0
Contributors: 4
Commits, last 52 weeks: 6

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.

127,542,027 downloads last week, 618,175,924 in the last month. The 12-month change of +127% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 18 in total
Latest version: 1.1.1, 8 Jun 20263 months ago
First published: 2 Dec 2019
Last push to GitHub: 8 Jun 2026108 days before the snapshot
Repository archived: No
Open issues: 0
Open pull requests: 0
Commits, last 52 weeks: 6
Dependents on npm: 1,439

Major versions

v1 first release 1.0.1, 2 Dec 2019

Recent releases

Version	Published
1.1.1	8 Jun 2026
1.1.0	11 Dec 2024
1.0.6	29 Feb 2024
1.0.5	6 Feb 2024
1.0.4	29 Dec 2020
1.0.3	23 Aug 2020
1.0.2	20 Dec 2019
1.0.1	2 Dec 2019

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: >= 0.4
Runtimes: -
Unpacked size (npm): 22 kB
Dependencies (5): es-errorsobject-inspectside-channel-mapside-channel-listside-channel-weakmap

Install

npm install side-channel

CDN

jsDelivr: 322k requests in 30 days

jsDelivrhttps://cdn.jsdelivr.net/npm/side-channel@1.1.1/
unpkghttps://unpkg.com/side-channel@1.1.1/
esm.shhttps://esm.sh/side-channel@1.1.1

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

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