Sample
express 5.2.1: Access parent route parameters inside nested express.Router instances using mergeParams: true
Verified sample for npm express 5.2.1: Access parent route parameters inside nested express.Router instances using mergeParams: true. The contract ran on…
sha256:f8ca69ed2b8293632a86541498c8a534e2e59536a647c9c4e6f3d7cd2ad45f88
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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
- Access parent route parameters inside nested express.Router instances using mergeParams: true
- Packages
- Symbols
-
- express.Router
- req.params
- Environment
- node
- Created
- 2026-08-16T06:29:57Z
Contract
- assert child router without mergeParams drops parent route parameters with undefined values
- assert child router with mergeParams: true inherits ancestor route parameters across nested tiers
- assert child parameter shadows ancestor parameter when parameter names collide
- assert req.baseUrl and req.path are partitioned at the child router mount point
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/index.mjs
- test/contract.mjs