Sample
react 18.3.1: Differentiate React development vs production runtime contracts across NODE_ENV branching, jsxDEV stubbing, element immutability, and minified error invariant decoding
Verified sample for npm react 18.3.1: Differentiate React development vs production runtime contracts across NODE_ENV branching, jsxDEV stubbing, element…
sha256:a8e74b80a92c127ce2b29ee4d261faaea5cb092cc5869188facceec927b1a737
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
- Differentiate React development vs production runtime contracts across NODE_ENV branching, jsxDEV stubbing, element immutability, and minified error invariant decoding
- Packages
- Symbols
-
- react.createElement
- react/jsx-dev-runtime.jsxDEV
- react/jsx-runtime.jsx
- react.useLayoutEffect
- react-dom/client.createRoot
- react-dom/server.renderToString
- Environment
- node
- Created
- 2026-08-16T12:42:21Z
Contract
- assert NODE_ENV non-production values (staging, test, undefined) strictly default to development bundles with frozen element props
- assert react/jsx-dev-runtime exports jsxDEV as undefined in production and throws TypeError when invoked by dev-compiled builds
- assert element and props immutability via Object.freeze is enforced in development but stripped in production enabling in-place mutation
- assert ReactDOMClient invariant errors format with human-readable explanations in development but compress into minified URL error codes in production
- assert SSR diagnostic warnings for client-only hooks (useLayoutEffect) log to console.error in development and are completely eliminated in production
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs