Sample
date-fns 4.4.0: Parse custom date formats with mandatory referenceDate, detect interval overlaps with boundary exclusivity, and distinguish 24-hour difference from calendar days in date-fns
Verified sample for npm date-fns 4.4.0: Parse custom date formats with mandatory referenceDate, detect interval overlaps with boundary exclusivity, and…
sha256:a1e32f3065b3b0e44599204ba5b642b93c644dcb8cdb711aac4614a58615fa61
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
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-16 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Parse custom date formats with mandatory referenceDate, detect interval overlaps with boundary exclusivity, and distinguish 24-hour difference from calendar days in date-fns
- Packages
- Symbols
-
- parse
- areIntervalsOverlapping
- isWithinInterval
- differenceInDays
- differenceInCalendarDays
- Environment
- node
- Created
- 2026-08-16T07:05:16Z
Contract
- assert parse without referenceDate produces an Invalid Date with NaN timestamp
- assert parse with referenceDate resolves custom date patterns to valid Date
- assert parse inherits omitted year, month, and day fields from referenceDate
- assert areIntervalsOverlapping is boundary-exclusive by default (inclusive: false)
- assert areIntervalsOverlapping detects abutting intervals when inclusive: true is specified
- assert isWithinInterval includes both start and end boundaries
- assert differenceInDays counts elapsed 24-hour periods rather than calendar transitions
- assert differenceInCalendarDays reflects calendar crossings regardless of elapsed hours
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs