CodeSampleX

Beispiel

babel-plugin-polyfill-corejs3 0.11.1

Verifiziertes Beispiel für npm babel-plugin-polyfill-corejs3 0.11.1. Der Vertrag lief auf node 22 · linux debian/x64 · docker und bestand.

sha256:0ec004dda831e0a3d534421325e7758a3550f308fcdbb668afc0dc8b6dbf4a0f

Dieses Netzwerk bietet eine Sache: ein Sample, das baut. Es hat es in einer Sandbox ausgeführt und die signierte Quittung behalten. Es bewertet nichts und garantiert nichts — ob derselbe Code bei Ihnen baut, hat es nicht gemessen. Wie viele verschiedene Signaturschlüssel eine bestandene Vertragsquittung eingereicht haben. Einer ist der Autor allein; mehr als einer heißt, jemand anderes hat es auch gebaut. Ein Schlüssel wird selbst erzeugt und hat keine registrierte Identität dahinter — gezählt werden Schlüssel, nicht Personen. MIT-0

Ausführungsbelege

Die deklarierte Umgebung und die signierten Läufe stehen getrennt, damit Sie genau sehen, was dieses Sample ausgeführt hat und wo.

Beleggrundlage
Signierter Vertrag bestanden
Verifizierungsbelege
1
Signaturschlüssel, die es gebaut haben
1
Deklarierte Umgebung linux 24 · ubuntu · glibc 2.39 x64 npm

Umgebungen der Verifizierungsläufe

Umgebung Contract Stufen Lauf
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

Fall

HOW
Ziel
verify pkg:npm/babel-plugin-polyfill-corejs3@0.11.1
Pakete
Erstellt
2026-09-04T23:17:20Z

Contract

  1. Babel transformSync with usage-global method injects core-js module imports for used built-ins while preserving call sites
  2. Babel transformSync with usage-pure method rewrites built-in calls to imported core-js-pure helpers without global pollution
  3. Babel transformSync with entry-global method replaces bare core-js import with granular polyfill imports for the specified targets
  4. Target browser environment filtering omits polyfill imports for features already supported natively by the target
  5. Syntax-level iteration constructs such as for-of loops automatically trigger injection of common iterator polyfills
  6. Proposals option controls whether experimental ECMAScript proposal polyfills are included during injection

Dateien

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

Quellartefakt herunterladen (tar.gz)

Quelltext

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 code using @babel/core and babel-plugin-polyfill-corejs3.
 * @param {string} code - The source code to transform.
 * @param {object} pluginOptions - Options passed to babel-plugin-polyfill-corejs3.
 * @param {object} [babelOptions] - Additional Babel transformSync options.
 * @returns {string} The transformed JavaScript code.
 */
export function transformWithCorejs3(code, pluginOptions = {}, babelOptions = {}) {
  const result = babelCore.transformSync(code, {
    configFile: false,
    babelrc: false,
    plugins: [[plugin, pluginOptions]],
    ...babelOptions
  });
  return result ? result.code : '';
}

/**
 * Transforms code using usage-global mode (injects global polyfill imports).
 * @param {string} code - The source code.
 * @param {object} [targets] - Browser/environment targets.
 * @param {object} [extraOptions] - Additional plugin options.
 * @returns {string} Transformed code.
 */
export function transformUsageGlobal(code, targets = { ie: '11' }, extraOptions = {}) {
  return transformWithCorejs3(code, {
    method: 'usage-global',
    targets,
    ...extraOptions
  });
}

/**
 * Transforms code using usage-pure mode (rewrites calls to pure helpers without polluting globals).
 * @param {string} code - The source code.
 * @param {object} [targets] - Browser/environment targets.
 * @param {object} [extraOptions] - Additional plugin options.
 * @returns {string} Transformed code.
 */
export function transformUsagePure(code, targets = { ie: '11' }, extraOptions = {}) {
  return transformWithCorejs3(code, {
    method: 'usage-pure',
    targets,
    ...extraOptions
  });
}

/**
 * Transforms code using entry-global mode (expands bare core-js import into target polyfills).
 * @param {string} code - The source code.
 * @param {object} [targets] - Browser/environment targets.
 * @param {object} [extraOptions] - Additional plugin options.
 * @returns {string} Transformed code.
 */
export function transformEntryGlobal(code, targets = { chrome: '120' }, extraOptions = {}) {
  return transformWithCorejs3(code, {
    method: 'entry-global',
    targets,
    ...extraOptions
  });
}

/**
 * Extracts injected import specifiers from transformed code.
 * @param {string} code - Transformed code containing import statements.
 * @returns {string[]} Array of import module paths.
 */
export function extractInjectedImports(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 {
  transformUsageGlobal,
  transformUsagePure,
  transformEntryGlobal,
  extractInjectedImports
} from '../src/index.mjs';

// 1. Babel transformSync with usage-global method injects core-js module imports for used built-ins while preserving call sites
{
  const input = 'const ok = [1, 2].includes(1); const p = new Promise(resolve => resolve(ok));';
  const output = transformUsageGlobal(input, { ie: '11' });
  const imports = extractInjectedImports(output);

  assert.ok(
    imports.includes('core-js/modules/es.array.includes.js'),
    'usage-global must inject es.array.includes'
  );
  assert.ok(
    imports.includes('core-js/modules/es.promise.js'),
    'usage-global must inject es.promise'
  );
  assert.ok(
    output.includes('[1, 2].includes(1)'),
    'usage-global must preserve method call site without rewriting'
  );
  assert.ok(
    output.includes('new Promise'),
    'usage-global must preserve Promise constructor call site'
  );
}

// 2. Babel transformSync with usage-pure method rewrites built-in calls to imported core-js-pure helpers without global pollution
{
  const input = 'const ok = [1, 2].includes(1); const p = new Promise(resolve => resolve(ok));';
  const output = transformUsagePure(input, { ie: '11' });
  const imports = extractInjectedImports(output);

  assert.ok(
    imports.some(imp => imp.includes('core-js-pure/stable/instance/includes.js')),
    'usage-pure must import pure includes helper from core-js-pure'
  );
  assert.ok(
    imports.some(imp => imp.includes('core-js-pure/stable/promise/index.js')),
    'usage-pure must import pure Promise helper from core-js-pure'
  );
  assert.ok(
    output.includes('_includesInstanceProperty('),
    'usage-pure must rewrite includes() to pure helper wrapper call'
  );
  assert.ok(
    output.includes('new _Promise('),
    'usage-pure must rewrite new Promise to pure constructor alias'
  );
  assert.ok(
    !imports.some(imp => imp.startsWith('core-js/modules/')),
    'usage-pure must not inject global core-js module imports'
  );
}

// 3. Babel transformSync with entry-global method replaces bare core-js import with granular polyfill imports for the specified targets
{
  const input = 'import "core-js";';
  const output = transformEntryGlobal(input, { chrome: '120' });
  const imports = extractInjectedImports(output);

  assert.ok(
    !output.includes('import "core-js";') && !output.includes("import 'core-js';"),
    'entry-global must remove bare core-js import'
  );
  assert.ok(
    imports.length > 20,
    'entry-global must expand core-js into granular module imports'
  );
  assert.ok(
    imports.every(imp => imp.startsWith('core-js/modules/')),
    'entry-global imports must point to core-js/modules/'
  );
}

// 4. Target browser environment filtering omits polyfill imports for features already supported natively by the target
{
  const input = 'const ok = [1, 2].includes(1); const p = new Promise(resolve => resolve(ok));';
  const output = transformUsageGlobal(input, { chrome: '120' });
  const imports = extractInjectedImports(output);

  assert.equal(
    imports.length,
    0,
    'Chrome 120 natively supports includes and Promise, so no polyfill imports should be injected'
  );
}

// 5. Syntax-level iteration constructs such as for-of loops automatically trigger injection of common iterator polyfills
{
  const input = 'for (const item of [1, 2]) { console.log(item); }';
  const output = transformUsageGlobal(input, { ie: '11' });
  const imports = extractInjectedImports(output);

  assert.ok(
    imports.includes('core-js/modules/es.array.iterator.js'),
    'for-of loop must trigger es.array.iterator polyfill'
  );
  assert.ok(
    imports.includes('core-js/modules/es.string.iterator.js'),
    'for-of loop must trigger es.string.iterator polyfill'
  );
  assert.ok(
    imports.includes('core-js/modules/web.dom-collections.iterator.js'),
    'for-of loop must trigger web.dom-collections.iterator polyfill'
  );
}

// 6. Proposals option controls whether experimental ECMAScript proposal polyfills are included during injection
{
  const input = 'const x = Math.clamp ? Math.clamp(1, 0, 2) : 1;';
  const withoutProposals = transformUsageGlobal(input, { ie: '11' }, { proposals: false });
  const withProposals = transformUsageGlobal(input, { ie: '11' }, { proposals: true });

  const importsWithout = extractInjectedImports(withoutProposals);
  const importsWith = extractInjectedImports(withProposals);

  assert.ok(
    !importsWithout.includes('core-js/modules/esnext.math.clamp.js'),
    'proposals: false must not inject proposal polyfills like esnext.math.clamp'
  );
  assert.ok(
    importsWith.includes('core-js/modules/esnext.math.clamp.js'),
    'proposals: true must inject proposal polyfills like esnext.math.clamp'
  );
}

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

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