CodeSampleX

Exemplo

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

Amostra verificada para npm @babel/plugin-transform-member-expression-literals 8.0.1. O contrato rodou em node 22 · linux alpine/x64 · docker e passou.

sha256:82b6fea234568d35cd8240ee8c6a448b71393994d4760d80451f712938c8af24

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
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

Caso

HOW
Objetivo
verify pkg:npm/%40babel/plugin-transform-member-expression-literals@8.0.1
Pacotes
Ambiente
node 22.23.2
Criado
2026-08-20T19:18:49Z

Contrato

  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

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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
};
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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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