Sample
express 4.18.2: Express defaults the application `query parser` setting to `'extended'`, parsing bracketed query string keys into nested objects and arrays.
Verified sample for npm express 4.18.2: Express defaults the application `query parser` setting to `'extended'`, parsing bracketed query string keys into…
sha256:58c08df4e2e12d0989f56f61a509551f26f9a7c7fce4300a49d1d6aa357a209c
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.
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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 |
2026-08-17 |
| 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
- Express defaults the application `query parser` setting to `'extended'`, parsing bracketed query string keys into nested objects and arrays.
- Packages
- Symbols
-
- express
- Environment
- node
- Created
- 2026-08-17T06:38:17Z
Contract
- When the `query parser` setting is left unset on an Express application, Express defaults `app.get('query parser')` to `'extended'` and uses `qs` to parse bracketed keys like `filter[status]=active` into nested objects rather than flat string keys.
- assert.strictEqual(app.get('query parser'), 'extended')
- assert.strictEqual(app.get('etag'), 'weak')
- assert.strictEqual(app.get('subdomain offset'), 2)
- assert.strictEqual(app.get('x-powered-by'), true)
- assert.strictEqual(app.get('trust proxy'), false)
- assert.deepStrictEqual(req.query, { filter: { status: 'active', limit: '10' }, tags: ['backend', 'express'] })
- assert(res.headers['etag'].startsWith('W/"'))
- assert.strictEqual(res.headers['x-powered-by'], 'Express')
- assert.deepStrictEqual(req.subdomains, ['v1', 'api'])
- assert.deepStrictEqual(req.ips, [])
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs