CodeSampleX

サンプル

@babel/plugin-transform-member-expression-literals 8.0.1

検証済みサンプル — npm @babel/plugin-transform-member-expression-literals 8.0.1. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました.

sha256:82b6fea234568d35cd8240ee8c6a448b71393994d4760d80451f712938c8af24

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 alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-20

ケース

HOW
ゴール
verify pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1
パッケージ
環境
node 22.23.2
作成日
2026-08-20T19:18:49Z

コントラクト

  1. transformMemberExpressions transforms reserved word property accesses into computed string literals
  2. transformMemberExpressions preserves valid ES3 identifiers in dot notation
  3. transformMemberExpressions transforms chained and nested reserved member expressions
  4. transformMemberExpressions transforms method calls and property reads on reserved keywords
  5. transformMemberExpressions leaves existing computed property accesses unchanged

ファイル

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • 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

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/%40babel/plugin-transform-member-expression-literals@8.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - runtime: node@22.23.2

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:c251d7c7d17a521903ca8cefee86b2bc3a54793b203b9553fa55ba83825e4b9c","constraints":{"executionContext":"node"},"contract":["transformMemberExpressions transforms reserved word property accesses into computed string literals","transformMemberExpressions preserves valid ES3 identifiers in dot notation","transformMemberExpressions transforms chained and nested reserved member expressions","transformMemberExpressions transforms method calls and property reads on reserved keywords","transformMemberExpressions leaves existing computed property accesses unchanged"],"goal":"verify pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1"],"schemaVersion":1},"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/plugin-transform-member-expression-literals@8.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1","verifierAdapter":"node-typescript@1"}
index.js
const babel = require('@babel/core');
const memberExpressionLiterals = require('@babel/plugin-transform-member-expression-literals');

/**
 * Transform JavaScript code using @babel/plugin-transform-member-expression-literals
 * to ensure reserved words in member expressions are converted to computed string literals.
 *
 * @param {string} code - The input JavaScript code to transform.
 * @param {object} [options] - Additional Babel options.
 * @returns {string} The transformed JavaScript code.
 */
function transformMemberExpressions(code, options = {}) {
  const plugin = memberExpressionLiterals.default || memberExpressionLiterals;
  const result = babel.transformSync(code, {
    plugins: [plugin],
    configFile: false,
    babelrc: false,
    comments: false,
    ...options
  });
  return result ? result.code : '';
}

module.exports = {
  transformMemberExpressions
};
package-lock.json
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package.json
{
  "name": "sample-babel-plugin-transform-member-expression-literals",
  "version": "1.0.0",
  "description": "Demonstrate @babel/plugin-transform-member-expression-literals transformations for ES3 compatibility",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "license": "MIT-0",
  "dependencies": {
    "@babel/core": "8.0.1",
    "@babel/plugin-transform-member-expression-literals": "8.0.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "runtime": "node@22.23.2"
  }
}
test/contract.js
const assert = require('assert');
const { transformMemberExpressions } = require('../index');

function runContractTests() {
  // 1. Transform reserved word property accesses into computed string literals
  const reservedCode = 'obj.default = 1; obj.catch = 2; obj.class = 3; obj.var = 4;';
  const transformedReserved = transformMemberExpressions(reservedCode);
  assert.strictEqual(
    transformedReserved,
    'obj["default"] = 1;\nobj["catch"] = 2;\nobj["class"] = 3;\nobj["var"] = 4;',
    'Reserved words used as property names should be transformed to computed string literals'
  );

  // 2. Preserve valid ES3 identifiers as dot notation
  const validCode = 'obj.validProperty = 1; obj.foo = 2; obj._private = 3; obj.$val = 4;';
  const transformedValid = transformMemberExpressions(validCode);
  assert.strictEqual(
    transformedValid,
    'obj.validProperty = 1;\nobj.foo = 2;\nobj._private = 3;\nobj.$val = 4;',
    'Valid non-reserved identifiers should remain in dot notation'
  );

  // 3. Transform chained and nested reserved member expressions
  const chainedCode = 'foo.default.bar.catch;';
  const transformedChained = transformMemberExpressions(chainedCode);
  assert.strictEqual(
    transformedChained,
    'foo["default"].bar["catch"];',
    'Nested and chained member expressions should only transform reserved word properties'
  );

  // 4. Transform method calls and property reads on reserved words
  const methodCode = 'promise.catch(handler).finally(cleanup); const x = obj.import;';
  const transformedMethod = transformMemberExpressions(methodCode);
  assert.strictEqual(
    transformedMethod,
    'promise["catch"](handler)["finally"](cleanup);\nconst x = obj["import"];',
    'Method calls and property reads on reserved identifiers should be transformed'
  );

  // 5. Leave existing computed property accesses unchanged
  const computedCode = 'obj["existing"]; obj[dynamicKey];';
  const transformedComputed = transformMemberExpressions(computedCode);
  assert.strictEqual(
    transformedComputed,
    'obj["existing"];\nobj[dynamicKey];',
    'Already computed member expressions should not be altered'
  );

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

runContractTests();

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