Sample
whatwg-mimetype 3.0.0
Verified sample for npm whatwg-mimetype 3.0.0. The contract ran on node 22 · linux alpine/x64 · docker and passed: MIMEType constructor parses valid MIME…
sha256:7e6cce8f75f782c4a14117dc306228551e26222f9401bfbcd8c5d9f04a42e488
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 1
- Signing keys that built it
- 1
Declared environment
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-20 |
Case
HOW- Goal
- verify pkg:npm/whatwg-mimetype@3.0.0
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-20T14:33:36Z
Contract
- MIMEType constructor parses valid MIME type strings into type, subtype, and essence
- MIMEType constructor throws an Error when given an invalid MIME type string
- MIMEType.parse returns a MIMEType instance for valid input and null for invalid input
- MIMEType instance properties type and subtype can be mutated with ASCII lowercase validation
- MIMEType instance parameters property allows getting, setting, checking, and deleting MIME parameters
- MIMEType toString serializes the MIME type with its parameters according to the WHATWG specification
- MIMEType isHTML, isXML, and isJavaScript predicate methods accurately identify media types
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.js
Origin Seeder
anonymous