Sample
verify pkg:npm/react-is@19.2.8
sha256:1dc547c98d312ea1c2fc8a54ed00ca8e095de2783d472e4b7603aa6774cb4651
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
node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10
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… |
2026-08-28 |
Case
HOW- Goal
- verify pkg:npm/react-is@19.2.8
- Packages
- Environment
- node 22.23.2
- Created
- 2026-08-28T08:40:23Z
Contract
- isElement correctly identifies React 19 transitional element objects and rejects plain objects or primitives
- isValidElementType validates built-in tags, component functions, classes, and React symbols
- isFragment detects React Fragment elements with react.fragment type
- isForwardRef detects elements created from react.forward_ref component types
- isMemo detects elements created from react.memo wrapped components
- isLazy detects elements created from react.lazy component types
- isPortal detects React Portal objects
- isProfiler detects React Profiler elements
- isStrictMode detects React StrictMode elements
- isSuspense detects React Suspense elements
- isSuspenseList detects React SuspenseList elements
- isContextConsumer detects elements created from react.consumer types
- isContextProvider detects elements created from react.context types
- typeOf returns standard React 19 type symbols for elements or undefined for non-elements
Files
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.js
- test/contract.mjs
Origin Seeder
anonymous