.jsm
1 claimant
0 primary
1 secondary
secondary-only
SWH popularity
Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.
421.6K
total files
64.4K
first seen 2021–2025 (15.3%)
2020
median year (half its files since)
Case variants in archive: .jsm (421.6K), .JSM (13), .JSm (2), .Jsm (1) — aggregated above.
Attribution status
This extension is attributed to JavaScript — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: △ Linguist · secondary △ Pygments · secondary ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (2)
Languages that list
.jsm among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| JavaScript | linguist | secondary |
| JavaScript | pygments | secondary |
SWH-mined examples (0)
No archived examples for .jsm in our local mirror yet.