示例

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

已验证示例 — npm @babel/plugin-transform-arrow-functions 8.0.1: pluginTransformArrowFunctions. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过.

sha256:f044dfabf15ed4a9343f92179114e9aaa6dfa538a5b1d75ff4d68f2275296e65

MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据: 签名契约通过
验证回执: 1
构建过它的签名密钥: 1

声明的环境 linux 24 · ubuntu · glibc 2.39 x64 npm

验证运行环境

环境	契约	阶段	运行日期
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

案例

HOW

目标: verify pluginTransformArrowFunctions in pkg:npm/%40babel/plugin-transform-arrow-functions@8.0.1
包: @babel/plugin-transform-arrow-functions 8.0.1
符号: pluginTransformArrowFunctions
创建时间: 2026-08-26T05:10:13Z

契约

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

文件

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

下载源代码构件 (tar.gz)

源代码

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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