CodeSampleX

Exemple

babel-plugin-polyfill-corejs3 0.11.1

Échantillon vérifié pour npm babel-plugin-polyfill-corejs3 0.11.1. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:b4e8c39cf0f204193946496f29c5b2456223736b32fbcdc5f917a2bcbc67cb16

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-04

Cas

HOW
Objectif
verify pkg:npm/babel-plugin-polyfill-corejs3@0.11.1
Paquets
Créé
2026-09-04T23:21:39Z

Contrat

  1. Target core-js version specification filters modern API polyfills according to release availability
  2. Plugin validates version configuration string and rejects invalid format with descriptive error
  3. Async function declarations in usage-global mode trigger automatic injection of Promise dependencies
  4. Array spread elements trigger common iterator polyfills while object spread elements do not
  5. Delegated yield expressions in generator functions automatically trigger common iterator polyfills
  6. Array pattern destructuring triggers iterator polyfills for iterable unpacking
  7. Usage-pure mode rewrites Symbol.iterator in binary expressions into pure is-iterable helper invocations

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code 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 pkg:npm/babel-plugin-polyfill-corejs3@0.11.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/babel-plugin-polyfill-corejs3@0.11.1

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
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package-lock.json
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package.json
{
  "name": "sample-babel-plugin-polyfill-corejs3",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "babel-plugin-polyfill-corejs3": "0.11.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/babel-plugin-polyfill-corejs3@0.11.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/babel-plugin-polyfill-corejs3@0.11.1"
  ]
}
src/index.mjs
import * as babel from '@babel/core';
import polyfillCorejs3Plugin from 'babel-plugin-polyfill-corejs3';

const babelCore = babel.default || babel;
export const plugin = polyfillCorejs3Plugin.default || polyfillCorejs3Plugin;

/**
 * Transforms JavaScript source code using @babel/core and babel-plugin-polyfill-corejs3.
 * @param {string} code - Source code to transform.
 * @param {object} pluginOptions - Configuration options passed to babel-plugin-polyfill-corejs3.
 * @param {object} [babelOptions] - Additional options passed to Babel transformSync.
 * @returns {string} Transformed JavaScript code.
 */
export function transformWithPlugin(code, pluginOptions = {}, babelOptions = {}) {
  const result = babelCore.transformSync(code, {
    configFile: false,
    babelrc: false,
    plugins: [[plugin, pluginOptions]],
    ...babelOptions
  });
  return result ? result.code : '';
}

/**
 * Transforms code in usage-global mode with customizable core-js version and target environments.
 * @param {string} code - Source code to transform.
 * @param {object} [options] - Additional plugin options (version, targets, proposals, etc.).
 * @returns {string} Transformed JavaScript code.
 */
export function transformUsageGlobalWithOptions(code, options = {}) {
  const { version = '3.20', targets = { ie: '11' }, ...rest } = options;
  return transformWithPlugin(code, {
    method: 'usage-global',
    version,
    targets,
    ...rest
  });
}

/**
 * Transforms code in usage-pure mode with customizable options.
 * @param {string} code - Source code to transform.
 * @param {object} [options] - Additional plugin options.
 * @returns {string} Transformed JavaScript code.
 */
export function transformUsagePureWithOptions(code, options = {}) {
  const { targets = { ie: '11' }, ...rest } = options;
  return transformWithPlugin(code, {
    method: 'usage-pure',
    targets,
    ...rest
  });
}

/**
 * Extracts injected import specifiers from transformed source code.
 * @param {string} code - Transformed JavaScript source containing import declarations.
 * @returns {string[]} List of module specifier strings.
 */
export function extractImportSpecifiers(code) {
  const imports = [];
  const regex = /import\s+(?:[^"'\n]+\s+from\s+)?["']([^"']+)["']/g;
  let match;
  while ((match = regex.exec(code)) !== null) {
    imports.push(match[1]);
  }
  return imports;
}
test/contract.mjs
import assert from 'node:assert/strict';
import {
  transformUsageGlobalWithOptions,
  transformUsagePureWithOptions,
  extractImportSpecifiers
} from '../src/index.mjs';

// 1. Target core-js version specification filters modern API polyfills according to release availability
{
  const code = 'const exists = Object.hasOwn(data, "key");';
  const outV30 = transformUsageGlobalWithOptions(code, { version: '3.0' });
  const outV320 = transformUsageGlobalWithOptions(code, { version: '3.20' });

  const importsV30 = extractImportSpecifiers(outV30);
  const importsV320 = extractImportSpecifiers(outV320);

  assert.equal(
    importsV30.includes('core-js/modules/es.object.has-own.js'),
    false,
    'core-js 3.0 must not inject es.object.has-own because Object.hasOwn requires newer core-js'
  );
  assert.equal(
    importsV320.includes('core-js/modules/es.object.has-own.js'),
    true,
    'core-js 3.20 must inject es.object.has-own when targeting IE 11'
  );
}

// 2. Plugin validates version configuration string and rejects invalid format with descriptive error
{
  assert.throws(
    () => {
      transformUsageGlobalWithOptions('const x = 1;', { version: 'invalid' });
    },
    {
      message: /Invalid version: invalid/
    },
    'Plugin must reject invalid version strings'
  );
}

// 3. Async function declarations in usage-global mode trigger automatic injection of Promise dependencies
{
  const code = 'async function fetchStatus() { return 200; }';
  const output = transformUsageGlobalWithOptions(code);
  const imports = extractImportSpecifiers(output);

  assert.equal(
    imports.includes('core-js/modules/es.promise.js'),
    true,
    'usage-global must inject es.promise when encountering async function declarations'
  );
}

// 4. Array spread elements trigger common iterator polyfills while object spread elements do not
{
  const arraySpreadCode = 'const items = [...elements];';
  const objectSpreadCode = 'const record = { ...properties };';

  const arraySpreadOutput = transformUsageGlobalWithOptions(arraySpreadCode);
  const objectSpreadOutput = transformUsageGlobalWithOptions(objectSpreadCode);

  const arrayImports = extractImportSpecifiers(arraySpreadOutput);
  const objectImports = extractImportSpecifiers(objectSpreadOutput);

  assert.equal(
    arrayImports.includes('core-js/modules/es.array.iterator.js'),
    true,
    'Array spread element must inject es.array.iterator'
  );
  assert.equal(
    objectImports.includes('core-js/modules/es.array.iterator.js'),
    false,
    'Object spread expression must not inject es.array.iterator'
  );
}

// 5. Delegated yield expressions in generator functions automatically trigger common iterator polyfills
{
  const code = 'function* delegateGenerator() { yield* stream; }';
  const output = transformUsageGlobalWithOptions(code);
  const imports = extractImportSpecifiers(output);

  assert.equal(
    imports.includes('core-js/modules/es.array.iterator.js'),
    true,
    'yield* expression must trigger common iterator injection'
  );
}

// 6. Array pattern destructuring triggers iterator polyfills for iterable unpacking
{
  const code = 'const [primary, secondary] = source;';
  const output = transformUsageGlobalWithOptions(code);
  const imports = extractImportSpecifiers(output);

  assert.equal(
    imports.includes('core-js/modules/es.array.iterator.js'),
    true,
    'Array destructuring pattern must trigger iterator polyfill injection'
  );
}

// 7. Usage-pure mode rewrites Symbol.iterator in binary expressions into pure is-iterable helper invocations
{
  const code = 'const iterable = Symbol.iterator in collection;';
  const output = transformUsagePureWithOptions(code);
  const imports = extractImportSpecifiers(output);

  assert.ok(
    imports.some(imp => imp.includes('core-js-pure/features/is-iterable.js')),
    'usage-pure must inject is-iterable pure helper'
  );
  assert.ok(
    output.includes('_isIterable(collection)'),
    'usage-pure must rewrite "Symbol.iterator in collection" to _isIterable(collection)'
  );
}

console.log('All contract assertions passed successfully.');

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