CodeSampleX

Exemplo

@babel/plugin-transform-arrow-functions 8.0.1: pluginTransformArrowFunctions

Amostra verificada para npm @babel/plugin-transform-arrow-functions 8.0.1: pluginTransformArrowFunctions. O contrato rodou em node 22 · linux alpine/x64 …

sha256:f044dfabf15ed4a9343f92179114e9aaa6dfa538a5b1d75ff4d68f2275296e65

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-26

Caso

HOW
Objetivo
verify pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1
Pacotes
Símbolos
  • pluginTransformArrowFunctions
Criado
2026-08-26T05:10:13Z

Contrato

  1. transforms concise body arrow functions to standard function expressions with explicit return
  2. transforms block body arrow functions with multiple parameters to standard function expressions
  3. transforms parameterless arrow functions to standard function expressions

Arquivos

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

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 pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1
Demonstrate these symbols/APIs:
  - pluginTransformArrowFunctions

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:sha256:15a25801d21f41f6de518ed7b5e4f1d6a47d1e7efc03f2beff313a2a6d4de346","contract":["transforms concise body arrow functions to standard function expressions with explicit return","transforms block body arrow functions with multiple parameters to standard function expressions","transforms parameterless arrow functions to standard function expressions"],"goal":"verify pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1"],"schemaVersion":1,"symbols":["pluginTransformArrowFunctions"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1","symbols":["pluginTransformArrowFunctions"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-arrow-functions",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "@babel/core": "8.0.1",
    "@babel/plugin-transform-arrow-functions": "8.0.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1"
  ],
  "symbols": [
    "pluginTransformArrowFunctions"
  ]
}
src/index.mjs
import { transformSync } from "@babel/core";
import pluginTransformArrowFunctions from "@babel/plugin-transform-arrow-functions";

/**
 * Transforms arrow functions in JavaScript code into ES5 standard functions.
 * @param {string} code - Source JavaScript code.
 * @param {object} [options] - Plugin configuration options.
 * @returns {string} - Transformed JavaScript code.
 */
export function transformArrowFunctions(code, options = {}) {
  const result = transformSync(code, {
    plugins: [[pluginTransformArrowFunctions, options]],
    configFile: false,
    babelrc: false,
  });
  return result?.code ?? "";
}

export { pluginTransformArrowFunctions };
test/contract.mjs
import assert from "node:assert/strict";
import { transformArrowFunctions, pluginTransformArrowFunctions } from "../src/index.mjs";

assert.equal(typeof pluginTransformArrowFunctions, "function", "pluginTransformArrowFunctions should be a function");

// Test 1: Transform concise body arrow function
{
  const input = "const square = (x) => x * x;";
  const output = transformArrowFunctions(input);
  assert(!output.includes("=>"), "Output must not contain arrow function syntax");
  assert(output.includes("function (x)"), "Output must contain regular function");
  assert(output.includes("return x * x;"), "Output must have explicit return");
}

// Test 2: Transform block body arrow function with multiple parameters
{
  const input = "const sum = (a, b) => { return a + b; };";
  const output = transformArrowFunctions(input);
  assert(!output.includes("=>"), "Output must not contain arrow function syntax");
  assert(output.includes("function (a, b)"), "Output must contain regular function");
  assert(output.includes("return a + b;"), "Output must preserve block return");
}

// Test 3: Transform parameterless arrow function
{
  const input = "const getConstant = () => 42;";
  const output = transformArrowFunctions(input);
  assert(!output.includes("=>"), "Output must not contain arrow function syntax");
  assert(output.includes("function ()"), "Output must contain regular function");
  assert(output.includes("return 42;"), "Output must have explicit return");
}

console.log("All contract tests passed successfully.");

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