CodeSampleX

Sample

Mount components with react-dom/client createRoot, manage updates, and unmount cleanly

sha256:573b6a8bb7fbc989be02e796af80006779e0fff5d293a99eb99d01ff1bde9d65

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…		 2026-08-26

Case

HOW
Goal
Mount components with react-dom/client createRoot, manage updates, and unmount cleanly
Packages
Symbols
  • createRoot
  • react-dom/client.createRoot
Environment
node 22.23.2
Created
2026-08-26T14:34:21Z

Contract

  1. createRoot is exported as a function from react-dom/client
  2. createRoot throws descriptive error when given null or invalid container
  3. mountRoot synchronously renders component hierarchy into container
  4. updateRoot updates mounted component in place without replacing root container
  5. createRoot identifierPrefix configures prefix for useId hook
  6. unmountRoot clears container DOM children and fires unmount cleanups
  7. calling render on unmounted root throws error preventing stale updates

Files

  • NOTES.md
  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

anonymous