CodeSampleX

サンプル

@babel/core 7.24.7: transformAsync

検証済みサンプル — npm @babel/core 7.24.7: transformAsync. node 22 · linux debian/x64 · docker で contract を実行し、成功しました: transformAsync asynchronously transforms…

sha256:f7acc2c4fea6c81a496dae79231ff2fd88bef331ede1c94b90332c910b01da48

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 @babel/core.transformAsync in pkg:npm/%40babel/core@7.24.7
パッケージ
シンボル
  • transformAsync
環境
node 22.23.2
作成日
2026-09-05T08:07:28Z

コントラクト

  1. transformAsync asynchronously transforms JavaScript code and returns a promise resolving to an object with generated code string
  2. transformAsync applies custom plugin visitors to modify AST identifiers
  3. transformAsync generates source maps when sourceMaps option is enabled
  4. transformAsync returns AST node when ast option is set to true
  5. transformAsync returns null when filename matches ignore pattern
  6. transformAsync rejects with a SyntaxError with BABEL_PARSE_ERROR code when given invalid JavaScript syntax

ファイル

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

ソースアーティファクトをダウンロード (tar.gz)

ソース

csx.json
{"case":{"caseId":"case:sha256:b43b0cdd3a13d626c5f88108266f467013ccb499103136e2c5cf756e345408b1","contract":["transformAsync asynchronously transforms JavaScript code and returns a promise resolving to an object with generated code string","transformAsync applies custom plugin visitors to modify AST identifiers","transformAsync generates source maps when sourceMaps option is enabled","transformAsync returns AST node when ast option is set to true","transformAsync returns null when filename matches ignore pattern","transformAsync rejects with a SyntaxError with BABEL_PARSE_ERROR code when given invalid JavaScript syntax"],"goal":"verify @babel/core.transformAsync in pkg:npm/%40babel/core@7.24.7","kind":"HOW","packages":["pkg:npm/%40babel/core@7.24.7"],"schemaVersion":1,"symbols":["transformAsync"]},"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@7.24.7"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.24.7","symbols":["transformAsync"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-babel-transformasync",
  "version": "1.0.0",
  "description": "verify @babel/core.transformAsync in pkg:npm/%40babel/core@7.24.7",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/core": "7.24.7"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/core.transformAsync in pkg:npm/%40babel/core@7.24.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.24.7"
  ],
  "symbols": [
    "transformAsync"
  ]
}
src/index.js
const babel = require('@babel/core');

/**
 * Transforms JavaScript code asynchronously using @babel/core.transformAsync.
 *
 * @param {string} code - The source code to transform.
 * @param {object} [options={}] - Optional Babel transform options.
 * @returns {Promise<object|null>} Promise resolving to transformation result.
 */
async function transformCodeAsync(code, options = {}) {
  const defaultOptions = {
    configFile: false,
    babelrc: false,
    ...options
  };
  return babel.transformAsync(code, defaultOptions);
}

/**
 * Transforms code asynchronously with a custom AST visitor plugin.
 *
 * @param {string} code - The source code to transform.
 * @param {object} visitor - AST visitor map.
 * @returns {Promise<object|null>} Promise resolving to transformation result.
 */
async function transformWithVisitorAsync(code, visitor) {
  const customPlugin = () => ({
    visitor
  });
  return transformCodeAsync(code, {
    plugins: [customPlugin]
  });
}

/**
 * Transforms code asynchronously and produces a source map.
 *
 * @param {string} code - The source code to transform.
 * @param {string} [filename='source.js'] - Virtual filename for source mapping.
 * @returns {Promise<object|null>} Promise resolving to transformation result with source map.
 */
async function transformWithSourceMapAsync(code, filename = 'source.js') {
  return transformCodeAsync(code, {
    filename,
    sourceMaps: true
  });
}

module.exports = {
  transformCodeAsync,
  transformWithVisitorAsync,
  transformWithSourceMapAsync
};
test/contract.js
const assert = require('assert');
const babel = require('@babel/core');
const {
  transformCodeAsync,
  transformWithVisitorAsync,
  transformWithSourceMapAsync
} = require('../src/index');

async function runContractTests() {
  // 1. transformAsync asynchronously transforms JavaScript code and returns a promise resolving to an object with generated code string
  {
    const input = 'const x = 1 + 2;';
    const result = await transformCodeAsync(input);
    assert(result !== null, 'Result should not be null');
    assert.strictEqual(typeof result.code, 'string', 'Result must contain code string');
    assert(result.code.includes('const x = 1 + 2;'), 'Transformed code should contain statement');
  }

  // 2. transformAsync applies custom plugin visitors to modify AST identifiers
  {
    const input = 'const oldName = 42;';
    const result = await transformWithVisitorAsync(input, {
      Identifier(path) {
        if (path.node.name === 'oldName') {
          path.node.name = 'newName';
        }
      }
    });
    assert(result !== null, 'Result should not be null');
    assert(result.code.includes('const newName = 42;'), 'Identifier must be renamed');
    assert(!result.code.includes('oldName'), 'Old identifier should not be present');
  }

  // 3. transformAsync generates source maps when sourceMaps option is enabled
  {
    const input = 'function add(a, b) { return a + b; }';
    const result = await transformWithSourceMapAsync(input, 'calc.js');
    assert(result !== null, 'Result should not be null');
    assert(result.map !== null && typeof result.map === 'object', 'Source map should be generated');
    assert.strictEqual(result.map.version, 3, 'Source map version should be 3');
    assert(Array.isArray(result.map.sources), 'Source map sources should be an array');
    assert(result.map.sources.includes('calc.js'), 'Sources should include calc.js');
    assert.strictEqual(typeof result.map.mappings, 'string', 'Mappings should be a string');
  }

  // 4. transformAsync returns AST node when ast option is set to true
  {
    const input = 'const value = "hello";';
    const result = await transformCodeAsync(input, { ast: true });
    assert(result !== null, 'Result should not be null');
    assert(result.ast !== null && typeof result.ast === 'object', 'AST must be returned when ast: true');
    assert.strictEqual(result.ast.type, 'File', 'AST root node must be File');
    assert.strictEqual(result.ast.program.type, 'Program', 'AST must contain Program node');
  }

  // 5. transformAsync returns null when filename matches ignore pattern
  {
    const input = 'const skipped = true;';
    const result = await transformCodeAsync(input, {
      filename: 'ignored-file.js',
      ignore: [/ignored-file/]
    });
    assert.strictEqual(result, null, 'Ignored file transformation must return null');
  }

  // 6. transformAsync rejects with a SyntaxError with BABEL_PARSE_ERROR code when given invalid JavaScript syntax
  {
    await assert.rejects(
      async () => {
        await transformCodeAsync('const broken = ;');
      },
      (err) => {
        return err instanceof SyntaxError && err.code === 'BABEL_PARSE_ERROR';
      },
      'Invalid syntax must throw SyntaxError with BABEL_PARSE_ERROR code'
    );
  }

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

runContractTests().catch((err) => {
  console.error(err);
  process.exit(1);
});

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