CodeSampleX

サンプル

@babel/core 7.24.7: transformSync

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

sha256:bbbe1bc0a2d44cd0940b4de378e1089503b7643e10fd93680e87adebd6fe4148

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.transformSync in pkg:npm/%40babel/core@7.24.7
パッケージ
シンボル
  • @babel/core.transformSync
環境
node 22.23.2
作成日
2026-09-05T07:45:50Z

コントラクト

  1. transformSync synchronously transforms JavaScript code and returns an object with generated code string
  2. transformSync applies custom plugin visitors synchronously to modify AST identifiers
  3. transformSync generates source maps when sourceMaps option is enabled
  4. transformSync returns AST node when ast option is set to true
  5. transformSync returns null when filename matches ignore pattern
  6. transformSync throws 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
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package-lock.json
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package.json
{
  "name": "sample-babel-transformsync",
  "version": "1.0.0",
  "description": "verify @babel/core.transformSync 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.transformSync in pkg:npm/%40babel/core@7.24.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.24.7"
  ],
  "symbols": [
    "@babel/core.transformSync"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const babel = require('@babel/core');

/**
 * Transforms JavaScript code synchronously using @babel/core.transformSync.
 *
 * @param {string} code - The source code to transform.
 * @param {object} [options={}] - Optional Babel transform options.
 * @returns {object|null} The transformation result with code, map, and ast.
 */
function transformCode(code, options = {}) {
  const defaultOptions = {
    configFile: false,
    babelrc: false,
    ...options
  };
  return babel.transformSync(code, defaultOptions);
}

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

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

module.exports = {
  transformCode,
  transformWithVisitor,
  transformWithSourceMap
};
test/contract.js
const assert = require('assert');
const babel = require('@babel/core');
const { transformCode, transformWithVisitor, transformWithSourceMap } = require('../src/index');

// 1. transformSync synchronously transforms JavaScript code and returns an object with generated code string
{
  const input = 'const x = 1 + 2;';
  const result = transformCode(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. transformSync applies custom plugin visitors synchronously to modify AST identifiers
{
  const input = 'const oldName = 42;';
  const result = transformWithVisitor(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. transformSync generates source maps when sourceMaps option is enabled
{
  const input = 'function add(a, b) { return a + b; }';
  const result = transformWithSourceMap(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. transformSync returns AST node when ast option is set to true
{
  const input = 'const value = "hello";';
  const result = transformCode(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. transformSync returns null when filename matches ignore pattern
{
  const input = 'const skipped = true;';
  const result = transformCode(input, {
    filename: 'ignored-file.js',
    ignore: [/ignored-file/]
  });
  assert.strictEqual(result, null, 'Ignored file transformation must return null');
}

// 6. transformSync throws a SyntaxError with BABEL_PARSE_ERROR code when given invalid JavaScript syntax
{
  assert.throws(
    () => {
      transformCode('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.');

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