CodeSampleX

Sample

@babel/core 7.29.7: loadOptions

Verified sample for npm @babel/core 7.29.7: loadOptions. The contract ran on node 22 · linux alpine/x64 · docker and passed: loadOptions resolves and…

sha256:42e583f4c9fd0be28677ae2e0354fe4b5e4e22d81ad2736f1ddaf374658ea873

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…		 2026-08-23

Case

HOW
Goal
verify @babel/core.loadOptions in pkg:npm/%40babel/core@7.29.7
Packages
Symbols
  • @babel/core.loadOptions
Environment
node 22.23.2
Created
2026-08-23T06:19:47Z

Contract

  1. loadOptions resolves and normalizes passed configuration options into an option descriptor object
  2. loadOptions returns null when the input filename matches an ignore pattern
  3. loadOptions normalizes inline plugin functions into active plugin descriptors
  4. loadOptions merges environment-specific configuration when envName is configured
  5. loadOptions applies matching overrides based on filename test patterns
  6. loadOptions throws an error when unknown or invalid configuration options are passed

Files

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

Download the source artifact (tar.gz)

Source

PROMPT.md
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 @babel/core.loadOptions in pkg:npm/%40babel/core@7.29.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.29.7
Demonstrate these symbols/APIs:
  - @babel/core.loadOptions

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.
csx.json
{"case":{"caseId":"case:sha256:af9e3a6e7bf01573c2d077d85eb740b331fd42c8a7f7238f92500daf4d12ec29","contract":["loadOptions resolves and normalizes passed configuration options into an option descriptor object","loadOptions returns null when the input filename matches an ignore pattern","loadOptions normalizes inline plugin functions into active plugin descriptors","loadOptions merges environment-specific configuration when envName is configured","loadOptions applies matching overrides based on filename test patterns","loadOptions throws an error when unknown or invalid configuration options are passed"],"goal":"verify @babel/core.loadOptions in pkg:npm/%40babel/core@7.29.7","kind":"HOW","packages":["pkg:npm/%40babel/core@7.29.7"],"schemaVersion":1,"symbols":["@babel/core.loadOptions"]},"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/%40babel/core@7.29.7"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.29.7","symbols":["@babel/core.loadOptions"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-load-options",
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  "lockfileVersion": 3,
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package.json
{
  "name": "sample-babel-load-options",
  "version": "1.0.0",
  "description": "verify @babel/core.loadOptions in pkg:npm/%40babel/core@7.29.7",
  "license": "MIT-0",
  "dependencies": {
    "@babel/core": "7.29.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/core.loadOptions in pkg:npm/%40babel/core@7.29.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.29.7"
  ],
  "symbols": [
    "@babel/core.loadOptions"
  ]
}
src/index.js
const babel = require('@babel/core');

/**
 * Loads and normalizes Babel configuration options using @babel/core.loadOptions.
 *
 * @param {object} [options={}] - Custom Babel options.
 * @returns {object|null} The resolved configuration descriptor object, or null if ignored.
 */
function loadBabelOptions(options = {}) {
  const defaultOptions = {
    configFile: false,
    babelrc: false,
    ...options
  };
  return babel.loadOptions(defaultOptions);
}

/**
 * Loads configuration options with custom inline plugins.
 *
 * @param {Array<Function|object>} plugins - Babel plugins to include.
 * @param {object} [options={}] - Additional options.
 * @returns {object|null} The resolved configuration descriptor with normalized plugins.
 */
function loadOptionsWithPlugins(plugins = [], options = {}) {
  return loadBabelOptions({
    plugins,
    ...options
  });
}

/**
 * Loads configuration options merged with environment-specific settings.
 *
 * @param {string} envName - Target environment name (e.g. 'production', 'development').
 * @param {object} envConfig - Environment specific configuration mapping.
 * @param {object} [options={}] - Base configuration options.
 * @returns {object|null} The resolved configuration descriptor with environment overrides.
 */
function loadEnvironmentOptions(envName, envConfig = {}, options = {}) {
  return loadBabelOptions({
    envName,
    env: envConfig,
    ...options
  });
}

/**
 * Loads configuration options and applies filename-matching overrides.
 *
 * @param {string} filename - Virtual filename for pattern evaluation.
 * @param {Array<object>} overrides - Array of override configuration blocks.
 * @param {object} [options={}] - Base configuration options.
 * @returns {object|null} The resolved configuration descriptor with matched overrides.
 */
function loadOptionsForFile(filename, overrides = [], options = {}) {
  return loadBabelOptions({
    filename,
    overrides,
    ...options
  });
}

/**
 * Checks if a specific file path is ignored according to ignore patterns.
 *
 * @param {string} filename - The file path to test.
 * @param {Array<string|RegExp>} ignorePatterns - Array of ignore patterns.
 * @returns {boolean} True if the file is ignored (loadOptions returns null).
 */
function isIgnoredFile(filename, ignorePatterns = []) {
  const result = loadBabelOptions({
    filename,
    ignore: ignorePatterns
  });
  return result === null;
}

module.exports = {
  loadBabelOptions,
  loadOptionsWithPlugins,
  loadEnvironmentOptions,
  loadOptionsForFile,
  isIgnoredFile
};
test/contract.js
const assert = require('assert');
const {
  loadBabelOptions,
  loadOptionsWithPlugins,
  loadEnvironmentOptions,
  loadOptionsForFile,
  isIgnoredFile
} = require('../src/index');

// 1. loadOptions resolves and normalizes passed configuration options into an option descriptor object
{
  const opts = loadBabelOptions({
    sourceMaps: true,
    minified: true,
    compact: true
  });
  assert(opts !== null && typeof opts === 'object', 'loadOptions should return a resolved config object');
  assert.strictEqual(opts.sourceMaps, true, 'sourceMaps option should be preserved');
  assert.strictEqual(opts.minified, true, 'minified option should be preserved');
  assert.strictEqual(opts.compact, true, 'compact option should be preserved');
  assert(Array.isArray(opts.plugins), 'plugins array should be initialized');
  assert(Array.isArray(opts.presets), 'presets array should be initialized');
  assert(typeof opts.targets === 'object' && opts.targets !== null, 'targets object should be initialized');
}

// 2. loadOptions returns null when the input filename matches an ignore pattern
{
  const ignoredPath = '/workspace/project/ignored-module.js';
  const notIgnoredPath = '/workspace/project/included-module.js';
  const ignorePatterns = ['/workspace/project/ignored-module.js'];

  assert.strictEqual(
    isIgnoredFile(ignoredPath, ignorePatterns),
    true,
    'loadOptions must return null for ignored files'
  );
  assert.strictEqual(
    isIgnoredFile(notIgnoredPath, ignorePatterns),
    false,
    'loadOptions must return options object for non-ignored files'
  );
}

// 3. loadOptions normalizes inline plugin functions into active plugin descriptors
{
  let visitedIdentifier = false;
  const customPlugin = function() {
    return {
      visitor: {
        Identifier() {
          visitedIdentifier = true;
        }
      }
    };
  };

  const opts = loadOptionsWithPlugins([customPlugin]);
  assert(opts !== null, 'loadOptions with plugins should return config object');
  assert.strictEqual(opts.plugins.length, 1, 'plugins array should contain 1 normalized plugin descriptor');
  assert.strictEqual(typeof opts.plugins[0].visitor, 'object', 'plugin descriptor should contain visitor object');
  assert.strictEqual(typeof opts.plugins[0].visitor.Identifier, 'object', 'visitor Identifier handler should be defined');
}

// 4. loadOptions merges environment-specific configuration when envName is configured
{
  const envConfig = {
    production: {
      minified: true,
      comments: false
    },
    development: {
      minified: false,
      comments: true
    }
  };

  const prodOpts = loadEnvironmentOptions('production', envConfig);
  assert(prodOpts !== null, 'prodOpts should return config object');
  assert.strictEqual(prodOpts.minified, true, 'production env should set minified to true');
  assert.strictEqual(prodOpts.comments, false, 'production env should set comments to false');

  const devOpts = loadEnvironmentOptions('development', envConfig);
  assert(devOpts !== null, 'devOpts should return config object');
  assert.strictEqual(devOpts.minified, false, 'development env should set minified to false');
  assert.strictEqual(devOpts.comments, true, 'development env should set comments to true');
}

// 5. loadOptions applies matching overrides based on filename test patterns
{
  const overrides = [
    {
      test: /\.jsx$/,
      sourceType: 'module',
      comments: false
    },
    {
      test: /\.json$/,
      sourceType: 'script',
      comments: true
    }
  ];

  const jsxOpts = loadOptionsForFile('component.jsx', overrides);
  assert(jsxOpts !== null, 'jsxOpts should return config object');
  assert.strictEqual(jsxOpts.sourceType, 'module', 'JSX file should match JSX override sourceType');
  assert.strictEqual(jsxOpts.comments, false, 'JSX file should match JSX override comments');

  const jsOpts = loadOptionsForFile('script.js', overrides, { sourceType: 'unambiguous' });
  assert(jsOpts !== null, 'jsOpts should return config object');
  assert.strictEqual(jsOpts.sourceType, 'unambiguous', 'Non-matching JS file should retain base sourceType');
}

// 6. loadOptions throws an error when unknown or invalid configuration options are passed
{
  assert.throws(
    () => {
      loadBabelOptions({
        invalidBabelConfigProperty: true
      });
    },
    (err) => {
      return err instanceof Error && err.message.includes('Unknown option: .invalidBabelConfigProperty');
    },
    'Unknown option must throw validation error'
  );
}

console.log('All @babel/core.loadOptions contract assertions passed successfully.');

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