CodeSampleX

サンプル

babel-plugin-polyfill-corejs3 0.11.1: exclude

検証済みサンプル — npm babel-plugin-polyfill-corejs3 0.11.1: exclude. node 22 · linux debian/x64 · docker で contract を実行し、成功しました: The exclude option suppresses…

sha256:1371347a8cdcedc78d45294dfe15a8409e628db30cc19bf6387bc0665f92200a

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

検証実行環境

環境 コントラクト ステージ 実行日
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…		 2026-09-05

ケース

HOW
ゴール
verify exclude in pkg:npm/babel-plugin-polyfill-corejs3@0.11.1
パッケージ
シンボル
  • exclude
環境
node 22.23.2
作成日
2026-09-05T02:11:48Z

コントラクト

  1. The exclude option suppresses polyfill injection for specified modules when targeting environments requiring polyfills
  2. Regular expression patterns in exclude options filter out entire matching namespaces of polyfills
  3. Multiple exclude patterns specified as an array suppress all matching polyfills simultaneously
  4. The entry-global method omits excluded polyfill modules from expanded core-js bundle imports
  5. The usage-pure method respects exclude options by omitting pure helper rewriting for excluded APIs
  6. Specifying a non-matching polyfill module pattern in exclude throws an option validation error
  7. Specifying conflicting polyfills in both include and exclude options throws a configuration error
  8. An empty exclude array is accepted without error and preserves default polyfill injection behavior

ファイル

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

ソースアーティファクトをダウンロード (tar.gz)

ソース

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 exclude in 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
Demonstrate these symbols/APIs:
  - exclude

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:sha256:74f8fff3f321f6d4b3d8ba92c9110a3c978319af08e777e0a129b6bae63e38d5","contract":["The exclude option suppresses polyfill injection for specified modules when targeting environments requiring polyfills","Regular expression patterns in exclude options filter out entire matching namespaces of polyfills","Multiple exclude patterns specified as an array suppress all matching polyfills simultaneously","The entry-global method omits excluded polyfill modules from expanded core-js bundle imports","The usage-pure method respects exclude options by omitting pure helper rewriting for excluded APIs","Specifying a non-matching polyfill module pattern in exclude throws an option validation error","Specifying conflicting polyfills in both include and exclude options throws a configuration error","An empty exclude array is accepted without error and preserves default polyfill injection behavior"],"goal":"verify exclude in pkg:npm/babel-plugin-polyfill-corejs3@0.11.1","kind":"HOW","packages":["pkg:npm/babel-plugin-polyfill-corejs3@0.11.1"],"schemaVersion":1,"symbols":["exclude"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/babel-plugin-polyfill-corejs3@0.11.1"],"schemaVersion":1,"subject":"pkg:npm/babel-plugin-polyfill-corejs3@0.11.1","symbols":["exclude"],"verifierAdapter":"node-typescript@1"}
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 exclude in pkg:npm/babel-plugin-polyfill-corejs3@0.11.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/babel-plugin-polyfill-corejs3@0.11.1"
  ],
  "symbols": [
    "exclude"
  ]
}
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 - Source code to transform.
 * @param {object} pluginOptions - Options passed to babel-plugin-polyfill-corejs3.
 * @param {object} [babelOptions] - Additional Babel transformSync options.
 * @returns {string} 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 : '';
}

/**
 * Extracts injected import specifiers from transformed source code.
 * @param {string} code - Transformed JavaScript source containing import declarations.
 * @returns {string[]} List of imported 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 { transformWithCorejs3, extractInjectedImports } from '../src/index.mjs';

// 1. The exclude option suppresses polyfill injection for specified modules when targeting environments requiring polyfills
{
  const code = 'const p = new Promise(resolve => resolve(1)); const ok = [1, 2].includes(1);';
  const defaultOutput = transformWithCorejs3(code, {
    method: 'usage-global',
    targets: { ie: '11' }
  });
  const excludedOutput = transformWithCorejs3(code, {
    method: 'usage-global',
    targets: { ie: '11' },
    exclude: ['es.promise']
  });

  const defaultImports = extractInjectedImports(defaultOutput);
  const excludedImports = extractInjectedImports(excludedOutput);

  assert.equal(
    defaultImports.includes('core-js/modules/es.promise.js'),
    true,
    'Default output targeting IE 11 should inject es.promise'
  );
  assert.equal(
    excludedImports.includes('core-js/modules/es.promise.js'),
    false,
    'Excluded module es.promise must not be injected'
  );
  assert.equal(
    excludedImports.includes('core-js/modules/es.array.includes.js'),
    true,
    'Non-excluded module es.array.includes should still be injected'
  );
}

// 2. Regular expression patterns in exclude options filter out entire matching namespaces of polyfills
{
  const code = 'const ok = [1, 2].includes(1); const flat = [1, [2]].flat(); const p = new Promise(r => r());';
  const regexExcludedOutput = transformWithCorejs3(code, {
    method: 'usage-global',
    targets: { ie: '11' },
    exclude: [/^es\.array\./]
  });

  const imports = extractInjectedImports(regexExcludedOutput);

  assert.equal(
    imports.includes('core-js/modules/es.array.includes.js'),
    false,
    'Regex exclude /^es\\.array\\./ must suppress es.array.includes'
  );
  assert.equal(
    imports.includes('core-js/modules/es.array.flat.js'),
    false,
    'Regex exclude /^es\\.array\\./ must suppress es.array.flat'
  );
  assert.equal(
    imports.includes('core-js/modules/es.promise.js'),
    true,
    'Non-matching modules such as es.promise must remain injected'
  );
}

// 3. Multiple exclude patterns specified as an array suppress all matching polyfills simultaneously
{
  const code = 'const p = new Promise(r => r()); const ok = [1].includes(1); const str = "a".padStart(3);';
  const multiExcludedOutput = transformWithCorejs3(code, {
    method: 'usage-global',
    targets: { ie: '11' },
    exclude: ['es.promise', /^es\.string\./]
  });

  const imports = extractInjectedImports(multiExcludedOutput);

  assert.equal(
    imports.includes('core-js/modules/es.promise.js'),
    false,
    'String rule in array must suppress es.promise'
  );
  assert.equal(
    imports.includes('core-js/modules/es.string.pad-start.js'),
    false,
    'Regex rule in array must suppress es.string.pad-start'
  );
  assert.equal(
    imports.includes('core-js/modules/es.array.includes.js'),
    true,
    'Non-excluded modules must still be injected'
  );
}

// 4. The entry-global method omits excluded polyfill modules from expanded core-js bundle imports
{
  const entryCode = 'import "core-js";';
  const defaultEntryOutput = transformWithCorejs3(entryCode, {
    method: 'entry-global',
    targets: { ie: '11' }
  });
  const excludedEntryOutput = transformWithCorejs3(entryCode, {
    method: 'entry-global',
    targets: { ie: '11' },
    exclude: ['es.promise']
  });

  const defaultImports = extractInjectedImports(defaultEntryOutput);
  const excludedImports = extractInjectedImports(excludedEntryOutput);

  assert.equal(
    defaultImports.includes('core-js/modules/es.promise.js'),
    true,
    'entry-global targeting IE 11 should inject es.promise'
  );
  assert.equal(
    excludedImports.includes('core-js/modules/es.promise.js'),
    false,
    'entry-global with exclude: ["es.promise"] must omit es.promise'
  );
}

// 5. The usage-pure method respects exclude options by omitting pure helper rewriting for excluded APIs
{
  const code = 'const ok = [1, 2].includes(1);';
  const defaultPureOutput = transformWithCorejs3(code, {
    method: 'usage-pure',
    targets: { ie: '11' }
  });
  const excludedPureOutput = transformWithCorejs3(code, {
    method: 'usage-pure',
    targets: { ie: '11' },
    exclude: ['es.array.includes']
  });

  assert.equal(
    defaultPureOutput.includes('_includesInstanceProperty('),
    true,
    'Default usage-pure should rewrite to helper'
  );
  assert.equal(
    excludedPureOutput.includes('_includesInstanceProperty('),
    false,
    'Excluded method in usage-pure must not be rewritten to pure helper'
  );
  assert.equal(
    excludedPureOutput.includes('[1, 2].includes(1)'),
    true,
    'Original expression must be preserved when excluded'
  );
}

// 6. Specifying a non-matching polyfill module pattern in exclude throws an option validation error
{
  assert.throws(
    () => {
      transformWithCorejs3('const x = 1;', {
        method: 'usage-global',
        exclude: ['non-existent-polyfill-identifier']
      });
    },
    {
      message: /The following "exclude" patterns didn't match any polyfill/
    },
    'Invalid exclude pattern must throw validation error'
  );
}

// 7. Specifying conflicting polyfills in both include and exclude options throws a configuration error
{
  assert.throws(
    () => {
      transformWithCorejs3('const x = 1;', {
        method: 'usage-global',
        include: ['es.promise'],
        exclude: ['es.promise']
      });
    },
    {
      message: /The following polyfills were matched both by "include" and "exclude" patterns/
    },
    'Overlapping include and exclude must throw conflict error'
  );
}

// 8. An empty exclude array is accepted without error and preserves default polyfill injection behavior
{
  const code = 'const ok = [1, 2].includes(1);';
  const output = transformWithCorejs3(code, {
    method: 'usage-global',
    targets: { ie: '11' },
    exclude: []
  });
  const imports = extractInjectedImports(output);
  assert.equal(
    imports.includes('core-js/modules/es.array.includes.js'),
    true,
    'Empty exclude array should preserve default injection'
  );
}

console.log('All 8 contract assertions passed successfully.');

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