globalthis 1.0.4: globalThis

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 globalThis in pkg:npm/globalthis@1.0.4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/globalthis@1.0.4
Demonstrate these symbols/APIs:
  - globalThis
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - 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:sha256:4fb8da08df30713e87cf45b51b765eba5ec790be2653da9e04e58c212b2c28f7","constraints":{"executionContext":"node"},"contract":["getGlobalObject returns the runtime global object containing ECMAScript built-in globals","getGlobalObject returns the same reference as runtime globalThis","getPolyfill returns polyfill implementation for globalThis","shimGlobalThis installs globalThis property on global object and returns global reference","hasGlobalProperty checks existence of global built-ins and returns false for nonexistent keys","setGlobalProperty writes and getGlobalProperty reads custom values on global scope","deleteGlobalProperty removes custom properties from global scope","globalthis exports fallback implementation object"],"goal":"verify globalThis in pkg:npm/globalthis@1.0.4","kind":"HOW","packages":["pkg:npm/globalthis@1.0.4"],"schemaVersion":1,"symbols":["globalThis"]},"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","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/globalthis@1.0.4"],"schemaVersion":1,"subject":"pkg:npm/globalthis@1.0.4","symbols":["globalThis"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-globalthis",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-globalthis",
      "version": "1.0.0",
      "dependencies": {
        "globalthis": "1.0.4"
      }
    },
    "node_modules/define-data-property": {
      "version": "1.1.4",
      "resolved": "https://registry.npmjs.org/define-data-property/-/define-data-property-1.1.4.tgz",
      "integrity": "sha512-rBMvIzlpA8v6E+SJZoo++HAYqsLrkg7MSfIinMPFhmkorw7X+dOXVJQs+QT69zGkzMyfDnIMN2Wid1+NbL3T+A==",
      "license": "MIT",
      "dependencies": {
        "es-define-property": "^1.0.0",
        "es-errors": "^1.3.0",
        "gopd": "^1.0.1"
      },
      "engines": {
        "node": ">= 0.4"
      },
      "funding": {
        "url": "https://github.com/sponsors/ljharb"
      }
    },
    "node_modules/define-properties": {
      "version": "1.2.1",
      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.2.1.tgz",
      "integrity": "sha512-8QmQKqEASLd5nx0U1B1okLElbUuuttJ/AnYmRXbbbGDWh6uS208EjD4Xqq/I9wK7u0v6O08XhTWnt5XtEbR6Dg==",
      "license": "MIT",
      "dependencies": {
        "define-data-property": "^1.0.1",
        "has-property-descriptors": "^1.0.0",
        "object-keys": "^1.1.1"
      },
      "engines": {
        "node": ">= 0.4"
      },
      "funding": {
        "url": "https://github.com/sponsors/ljharb"
      }
    },
    "node_modules/es-define-property": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.1.tgz",
      "integrity": "sha512-e3nRfgfUZ4rNGL232gUgX06QNyyez04KdjFrF+LTRoOXmrOgFKDg4BCdsjW8EnT69eqdYGmRpJwiPVYNrCaW3g==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
      }
    },
    "node_modules/es-errors": {
      "version": "1.3.0",
      "resolved": "https://registry.npmjs.org/es-errors/-/es-errors-1.3.0.tgz",
      "integrity": "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
      }
    },
    "node_modules/globalthis": {
      "version": "1.0.4",
      "resolved": "https://registry.npmjs.org/globalthis/-/globalthis-1.0.4.tgz",
      "integrity": "sha512-DpLKbNU4WylpxJykQujfCcwYWiV/Jhm50Goo0wrVILAv5jOr9d+H+UR3PhSCD2rCCEIg0uc+G+muBTwD54JhDQ==",
      "license": "MIT",
      "dependencies": {
        "define-properties": "^1.2.1",
        "gopd": "^1.0.1"
      },
      "engines": {
        "node": ">= 0.4"
      },
      "funding": {
        "url": "https://github.com/sponsors/ljharb"
      }
    },
    "node_modules/gopd": {
      "version": "1.2.0",
      "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
      "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
      },
      "funding": {
        "url": "https://github.com/sponsors/ljharb"
      }
    },
    "node_modules/has-property-descriptors": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/has-property-descriptors/-/has-property-descriptors-1.0.2.tgz",
      "integrity": "sha512-55JNKuIW+vq4Ke1BjOTjM2YctQIvCT7GFzHwmfZPGo5wnrgkid0YQtnAleFSqumZm4az3n2BS+erby5ipJdgrg==",
      "license": "MIT",
      "dependencies": {
        "es-define-property": "^1.0.0"
      },
      "funding": {
        "url": "https://github.com/sponsors/ljharb"
      }
    },
    "node_modules/object-keys": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
      "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
      }
    }
  }
}

{
  "name": "sample-globalthis",
  "version": "1.0.0",
  "private": true,
  "main": "src/index.js",
  "dependencies": {
    "globalthis": "1.0.4"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify globalThis in pkg:npm/globalthis@1.0.4",
  "kind": "HOW",
  "packages": [
    "pkg:npm/globalthis@1.0.4"
  ],
  "symbols": [
    "globalThis"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const globalThisPolyfill = require('globalthis');

/**
 * Returns the environment's global object.
 * @returns {object} The global object.
 */
function getGlobalObject() {
  return globalThisPolyfill();
}

/**
 * Returns the polyfill implementation for globalThis.
 * @returns {object} The resolved global object or polyfill implementation.
 */
function getPolyfill() {
  return globalThisPolyfill.getPolyfill();
}

/**
 * Shims globalThis onto the global object and returns the global reference.
 * @returns {object} The global object with globalThis guaranteed.
 */
function shimGlobalThis() {
  return globalThisPolyfill.shim();
}

/**
 * Checks if a property exists on the global object.
 * @param {string|symbol} key - Property key to check.
 * @returns {boolean} True if present.
 */
function hasGlobalProperty(key) {
  const globalObj = globalThisPolyfill();
  return Object.prototype.hasOwnProperty.call(globalObj, key) || key in globalObj;
}

/**
 * Reads a property value from the global scope.
 * @param {string|symbol} key - Property key to retrieve.
 * @returns {*} The property value.
 */
function getGlobalProperty(key) {
  const globalObj = globalThisPolyfill();
  return globalObj[key];
}

/**
 * Sets a property on the global scope.
 * @param {string|symbol} key - Property key.
 * @param {*} value - Value to set.
 * @returns {*} The set value.
 */
function setGlobalProperty(key, value) {
  const globalObj = globalThisPolyfill();
  globalObj[key] = value;
  return value;
}

/**
 * Deletes a property from the global scope.
 * @param {string|symbol} key - Property key to delete.
 * @returns {boolean} True if deleted successfully.
 */
function deleteGlobalProperty(key) {
  const globalObj = globalThisPolyfill();
  return delete globalObj[key];
}

module.exports = {
  getGlobalObject,
  getPolyfill,
  shimGlobalThis,
  hasGlobalProperty,
  getGlobalProperty,
  setGlobalProperty,
  deleteGlobalProperty,
};

const assert = require('node:assert/strict');
const {
  getGlobalObject,
  getPolyfill,
  shimGlobalThis,
  hasGlobalProperty,
  getGlobalProperty,
  setGlobalProperty,
  deleteGlobalProperty,
} = require('../src/index.js');
const globalThisPolyfill = require('globalthis');

async function main() {
  // 1. getGlobalObject returns the runtime global object containing ECMAScript built-in globals
  const globalObj = getGlobalObject();
  assert.equal(typeof globalObj, 'object');
  assert.notEqual(globalObj, null);
  assert.equal(globalObj.Array, Array);
  assert.equal(globalObj.Object, Object);
  assert.equal(globalObj.Math, Math);
  assert.equal(globalObj.JSON, JSON);
  assert.equal(globalObj.Promise, Promise);

  // 2. getGlobalObject returns the same reference as runtime globalThis
  assert.equal(globalObj, globalThis);

  // 3. getPolyfill returns polyfill implementation for globalThis
  const polyfill = getPolyfill();
  assert.equal(typeof polyfill, 'object');
  assert.equal(polyfill.Array, Array);
  assert.equal(polyfill.Math, Math);

  // 4. shimGlobalThis installs globalThis property on global object and returns global reference
  const shimmed = shimGlobalThis();
  assert.equal(shimmed, globalObj);
  assert.equal(shimmed.globalThis, shimmed);

  // 5. hasGlobalProperty checks existence of global built-ins and returns false for nonexistent keys
  assert.equal(hasGlobalProperty('Array'), true);
  assert.equal(hasGlobalProperty('Math'), true);
  assert.equal(hasGlobalProperty('__csx_nonexistent_prop_xyz__'), false);

  // 6. setGlobalProperty writes and getGlobalProperty reads custom values on global scope
  const testKey = '__csx_sample_globalthis_prop__';
  const testValue = { sample: 'verified', active: true };
  setGlobalProperty(testKey, testValue);
  assert.equal(hasGlobalProperty(testKey), true);
  assert.deepEqual(getGlobalProperty(testKey), testValue);

  // 7. deleteGlobalProperty removes custom properties from global scope
  const deleted = deleteGlobalProperty(testKey);
  assert.equal(deleted, true);
  assert.equal(hasGlobalProperty(testKey), false);
  assert.equal(getGlobalProperty(testKey), undefined);

  // 8. globalthis exports fallback implementation object
  assert.equal(typeof globalThisPolyfill.implementation, 'object');
  assert.notEqual(globalThisPolyfill.implementation, null);

  console.log('Contract verified successfully');
}

main().catch((err) => {
  console.error('Contract test failed:', err);
  process.exit(1);
});