Sample
date-fns 4.1.0: Configure date-fns global defaults with setDefaultOptions and handle locale object and week numbering rules without string tag errors
Verified sample for npm date-fns 4.1.0: Configure date-fns global defaults with setDefaultOptions and handle locale object and week numbering rules without…
sha256:ab08efd4bb62dbdbd02c9cfbd6a6a24927747d96b3d1c03b6f213e2cc2f25803
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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
- Configure date-fns global defaults with setDefaultOptions and handle locale object and week numbering rules without string tag errors
- Packages
- Symbols
-
- setDefaultOptions
- getDefaultOptions
- startOfWeek
- getWeek
- format
- Environment
- node
- Created
- 2026-08-16T07:07:10Z
Contract
- assert passing string locale code throws TypeError at runtime
- assert setDefaultOptions with Locale object formats localized dates globally
- assert startOfWeek inherits weekStartsOn from global locale configuration
- assert call-site options take precedence over global defaultOptions
- assert ISO-8601 week calculation requires firstWeekContainsDate 4 alongside weekStartsOn 1
- assert unsetting an explicit option with undefined reverts to locale default
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs