Package

source-map-js

Generates and consumes source maps

v1.2.1, 8 Sept 2024BSD-3-ClauseCommonJSTypes: Bundled

$ npm install source-map-js

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 137.3m; +200% over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 2 years ago; v1.2.1
GitHub stars: 102; 14 forks
Open issues / PRs: 6 / 2
Contributors: 73
Commits, last 52 weeks: 70

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.

137,333,014 downloads last week, 653,259,036 in the last month. The 12-month change of +200% compares the average of the last 4 weeks with the first 4 weeks of the series.

Maintenance

Releases, last 12 months: 08 in total
Latest version: 1.2.1, 8 Sept 20242 years ago
First published: 7 Feb 2021
Last push to GitHub: 10 May 2026137 days before the snapshot
Repository archived: No
Open issues: 6
Open pull requests: 2
Commits, last 52 weeks: 70
Dependents on npm: 1,465

Major versions

v1 first release 1.0.0, 4 Nov 2021
v0 first release 0.6.2, 7 Feb 2021

Recent releases

Version	Published
1.2.1	8 Sept 2024
1.2.0	19 Mar 2024
1.1.0	17 Mar 2024
1.0.3	17 Mar 2024
1.0.2	18 Jan 2022
1.0.1	8 Nov 2021
1.0.0	4 Nov 2021
0.6.2	7 Feb 2021

Compatibility

Module format: CommonJSFrom package.json type, main and exports fields
TypeScript types: Bundled
Node.js engine range: >=0.10.0
Runtimes: -
Unpacked size (npm): 137 kB
Dependencies (0): None

Install

npm install source-map-js

CDN

jsDelivr: 1.7m requests in 30 days

jsDelivrhttps://cdn.jsdelivr.net/npm/source-map-js@1.2.1/
unpkghttps://unpkg.com/source-map-js@1.2.1/
esm.shhttps://esm.sh/source-map-js@1.2.1

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

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