CodeSampleX

Exemple

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

Échantillon vérifié pour npm @babel/plugin-transform-arrow-functions 8.0.1: pluginTransformArrowFunctions. Le contrat s'est exécuté sur node 22 · linux…

sha256:f044dfabf15ed4a9343f92179114e9aaa6dfa538a5b1d75ff4d68f2275296e65

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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

Cas

HOW
Objectif
verify pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1
Paquets
Symboles
  • pluginTransformArrowFunctions
Créé
2026-08-26T05:10:13Z

Contrat

  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

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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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