Sample
Verify React 18.2.0 createElement symbol typing, element ref separation, Children traversal and key prefixing, cloneElement, memo, and forwardRef wrappers
sha256:f4fe7fad4e5332e7ba61ae6f9a2f6369fe58bfe63e6f18cd6e988685ff3b4103
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
- 1
- Signing keys that built it
- 1
Declared environment
linux 24 · ubuntu · glibc 2.39 x64 npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5… |
2026-08-26 |
Case
HOW- Goal
- Verify React 18.2.0 createElement symbol typing, element ref separation, Children traversal and key prefixing, cloneElement, memo, and forwardRef wrappers
- Packages
- Symbols
-
- React.Children
- React.cloneElement
- React.createElement
- React.forwardRef
- React.isValidElement
- React.memo
- Created
- 2026-08-26T07:45:00Z
Contract
- React.createElement constructs elements with Symbol.for('react.element') typeof, attaches ref directly to element.ref (leaving props.ref undefined), and places key on element.key.
- React.isValidElement validates Symbol.for('react.element') instances and returns false for component functions, memo/forwardRef definitions, plain objects, primitives, and null/undefined.
- React.cloneElement shallowly copies and overrides props, replaces or preserves ref/key, coerces key: null to string 'null', and replaces children when trailing arguments are supplied.
- React.Children.toArray flattens nested arrays, strips null/undefined/booleans, preserves 0 and empty strings, assigns hierarchical key prefixes, and treats React.Fragment as opaque.
- React.Children.count recursively tallies every child slot including null/undefined/booleans, while React.Children.only enforces a single valid React element child and throws on arrays or primitives.
- React.Children.map returns null or undefined on null or undefined input, flattens returned arrays, and omits null or undefined mapper return values.
- React.memo and React.forwardRef construct wrapper objects with distinctive $$typeof symbols (react.memo, react.forward_ref), custom comparison or render references, and valid element instantiation.
Files
- NOTES.md
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- test/contract.mjs
Origin Seeder
anonymous