is-potential-custom-element-name 1.0.1

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:npm/is-potential-custom-element-name@1.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/is-potential-custom-element-name@1.0.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:8959ae93f1d8a51ebdf9b76dace989dcf90318d483c68fc00353596e6bbab9ef","constraints":{"executionContext":"node"},"contract":["returns true for valid potential custom element names containing hyphens","returns false for names missing hyphens","returns false for names starting with uppercase letters or digits","returns false for names containing invalid characters"],"goal":"verify pkg:npm/is-potential-custom-element-name@1.0.1","kind":"HOW","packages":["pkg:npm/is-potential-custom-element-name@1.0.1"],"schemaVersion":1},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/is-potential-custom-element-name@1.0.1"],"schemaVersion":1,"subject":"pkg:npm/is-potential-custom-element-name@1.0.1","verifierAdapter":"node-typescript@1"}

const isPotentialCustomElementName = require('is-potential-custom-element-name');

function validateCustomElementName(name) {
  return isPotentialCustomElementName(name);
}

module.exports = {
  validateCustomElementName
};

{
  "name": "sample-is-potential-custom-element-name",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-is-potential-custom-element-name",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "is-potential-custom-element-name": "1.0.1"
      }
    },
    "node_modules/is-potential-custom-element-name": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/is-potential-custom-element-name/-/is-potential-custom-element-name-1.0.1.tgz",
      "integrity": "sha512-bCYeRA2rVibKZd+s2625gGnGF/t7DSqDs4dP7CrLA1m7jKWz6pps0LpYLJN8Q64HtmPKJ1hrN3nzPNKFEKOUiQ==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-is-potential-custom-element-name",
  "version": "1.0.0",
  "description": "Clean-room verification sample for is-potential-custom-element-name",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "is-potential-custom-element-name": "1.0.1"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/is-potential-custom-element-name@1.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/is-potential-custom-element-name@1.0.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "runtime": "node@22.23.2"
  }
}

const assert = require('node:assert');
const isPotentialCustomElementName = require('is-potential-custom-element-name');
const { validateCustomElementName } = require('../index.js');

// Valid potential custom element names containing hyphens
assert.strictEqual(isPotentialCustomElementName('my-element'), true);
assert.strictEqual(isPotentialCustomElementName('foo-bar'), true);
assert.strictEqual(isPotentialCustomElementName('x-tag'), true);
assert.strictEqual(isPotentialCustomElementName('custom-element-1'), true);
assert.strictEqual(isPotentialCustomElementName('annotation-xml'), true);
assert.strictEqual(validateCustomElementName('my-element'), true);

// Invalid element names missing hyphens
assert.strictEqual(isPotentialCustomElementName('foo'), false);
assert.strictEqual(isPotentialCustomElementName('div'), false);
assert.strictEqual(isPotentialCustomElementName('custom'), false);
assert.strictEqual(validateCustomElementName('div'), false);

// Invalid element names starting with uppercase or digits
assert.strictEqual(isPotentialCustomElementName('Foo-bar'), false);
assert.strictEqual(isPotentialCustomElementName('My-Element'), false);
assert.strictEqual(isPotentialCustomElementName('0-tag'), false);
assert.strictEqual(isPotentialCustomElementName('-tag'), false);

// Invalid characters
assert.strictEqual(isPotentialCustomElementName('baz-©'), false);