crelt 1.0.7

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/crelt@1.0.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/crelt@1.0.7

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:f3e046d0d45a0614977073cebfd46498b5660b76c94958c6314b0823b3ef0579","contract":["crelt creates DOM elements with tag name and attributes","crelt wraps existing DOM elements when passed as first argument","crelt appends string children as text nodes","crelt appends element and node children","crelt handles nested arrays of children flattening them recursively","crelt ignores null and undefined children","crelt throws RangeError for unsupported child node types"],"goal":"verify pkg:npm/crelt@1.0.7","kind":"HOW","packages":["pkg:npm/crelt@1.0.7"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/crelt@1.0.7"],"schemaVersion":1,"subject":"pkg:npm/crelt@1.0.7","verifierAdapter":"node-typescript@1"}

{
  "name": "crelt-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "crelt-sample",
      "version": "1.0.0",
      "dependencies": {
        "crelt": "1.0.7"
      }
    },
    "node_modules/crelt": {
      "version": "1.0.7",
      "resolved": "https://registry.npmjs.org/crelt/-/crelt-1.0.7.tgz",
      "integrity": "sha512-aK6BbWfhf4U/wCcLHKPJl/xa6VkVstRaPywWtMKGwuOLc/wZTyQYuoxgvZnNsBvv7Kg3YTBQYYBCggcviQczuA==",
      "license": "MIT"
    }
  }
}

{
  "name": "crelt-sample",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for crelt",
  "dependencies": {
    "crelt": "1.0.7"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/crelt@1.0.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/crelt@1.0.7"
  ]
}

import assert from 'node:assert';

// Minimal DOM mock for Node.js environment
class MockElement {
  constructor(tagName) {
    this.tagName = tagName.toUpperCase();
    this.nodeType = 1;
    this.attributes = {};
    this.childNodes = [];
  }

  setAttribute(name, value) {
    this.attributes[name] = String(value);
  }

  getAttribute(name) {
    return Object.prototype.hasOwnProperty.call(this.attributes, name) ? this.attributes[name] : null;
  }

  appendChild(child) {
    this.childNodes.push(child);
    return child;
  }
}

class MockTextNode {
  constructor(text) {
    this.nodeValue = String(text);
    this.nodeType = 3;
  }
}

globalThis.document = {
  createElement(tag) {
    return new MockElement(tag);
  },
  createTextNode(text) {
    return new MockTextNode(text);
  }
};

import crelt from 'crelt';

// 1. crelt creates DOM elements with tag name and attributes
const el1 = crelt('div', { id: 'test-id', class: 'container', tabIndex: 0 });
assert.strictEqual(el1.tagName, 'DIV');
assert.strictEqual(el1.getAttribute('id'), 'test-id');
assert.strictEqual(el1.getAttribute('class'), 'container');
assert.strictEqual(el1.tabIndex, 0);

// 2. crelt wraps existing DOM elements when passed as first argument
const existing = globalThis.document.createElement('section');
const el2 = crelt(existing, { 'data-mode': 'active' });
assert.strictEqual(el2, existing);
assert.strictEqual(el2.tagName, 'SECTION');
assert.strictEqual(el2.getAttribute('data-mode'), 'active');

// 3. crelt appends string children as text nodes
const el3 = crelt('p', null, 'hello', ' ', 'world');
assert.strictEqual(el3.childNodes.length, 3);
assert.strictEqual(el3.childNodes[0].nodeType, 3);
assert.strictEqual(el3.childNodes[0].nodeValue, 'hello');
assert.strictEqual(el3.childNodes[1].nodeValue, ' ');
assert.strictEqual(el3.childNodes[2].nodeValue, 'world');

// 4. crelt appends element and node children
const childSpan = crelt('span', null, 'inner');
const el4 = crelt('div', null, childSpan);
assert.strictEqual(el4.childNodes.length, 1);
assert.strictEqual(el4.childNodes[0], childSpan);
assert.strictEqual(el4.childNodes[0].childNodes[0].nodeValue, 'inner');

// 5. crelt handles nested arrays of children flattening them recursively
const el5 = crelt('ul', null, [
  crelt('li', null, 'item 1'),
  [crelt('li', null, 'item 2'), [crelt('li', null, 'item 3')]]
]);
assert.strictEqual(el5.childNodes.length, 3);
assert.strictEqual(el5.childNodes[0].childNodes[0].nodeValue, 'item 1');
assert.strictEqual(el5.childNodes[1].childNodes[0].nodeValue, 'item 2');
assert.strictEqual(el5.childNodes[2].childNodes[0].nodeValue, 'item 3');

// 6. crelt ignores null and undefined children
const el6 = crelt('div', null, null, 'valid', undefined);
assert.strictEqual(el6.childNodes.length, 1);
assert.strictEqual(el6.childNodes[0].nodeValue, 'valid');

// 7. crelt throws RangeError for unsupported child node types
assert.throws(
  () => {
    crelt('div', null, 42);
  },
  (err) => {
    return err instanceof RangeError && err.message.includes('Unsupported child node: 42');
  }
);

assert.throws(
  () => {
    crelt('div', null, { some: 'object' });
  },
  (err) => {
    return err instanceof RangeError && err.message.includes('Unsupported child node:');
  }
);

console.log('Contract passed');