CodeSampleX

Ejemplo

babel-preset-current-node-syntax 1.2.0: configure babel plugins for current node version

Muestra verificada para npm babel-preset-current-node-syntax 1.2.0: configure babel plugins for current node version. El contrato se ejecutó en node 22 …

sha256:e8a0526dc4fa6d267c2c8bdbe497bbd66d65425210291cc7277142b2dc8b41d5

Esta red ofrece una sola cosa: una muestra que compila. La ejecutó en un sandbox y guardó el recibo firmado. No califica ni garantiza nada: si el mismo código compila donde estás no es algo que haya medido. Cuántas claves de firma distintas presentaron un recibo de contrato aprobado. Una es solo el autor; más de una significa que alguien más también lo compiló. Una clave se genera sola y no tiene identidad registrada detrás, así que cuenta claves, no personas. MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia
Contrato firmado aprobado
Recibos de verificación
1
Claves de firma que lo compilaron
1
Entorno declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Entornos de las ejecuciones de verificación

Entorno Contrato Etapas Ejecución
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…		 2026-08-27

Caso

HOW
Objetivo
configure babel plugins for current node version
Paquetes
Símbolos
  • babel-preset-current-node-syntax
Entorno
node 22.23.2
Creado
2026-08-27T12:29:12Z

Contrato

  1. babel-preset-current-node-syntax returns an object with a plugins array when called with Babel 7 API
  2. babel-preset-current-node-syntax includes syntax plugins supported by the current Node.js runtime
  3. babel-preset-current-node-syntax enables parsing modern syntax features in Babel transformations
  4. babel-preset-current-node-syntax returns empty plugins list for non-Babel 7 versions

Archivos

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

Descargar el artefacto de código fuente (tar.gz)

Código fuente

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: configure babel plugins for current node version
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/babel-preset-current-node-syntax@1.2.0
Demonstrate these symbols/APIs:
  - babel-preset-current-node-syntax

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:sha256:89dc858dd100d47ecfbe4b756488afc5dd5f6f8cdc8edd9735990122326e12b6","contract":["babel-preset-current-node-syntax returns an object with a plugins array when called with Babel 7 API","babel-preset-current-node-syntax includes syntax plugins supported by the current Node.js runtime","babel-preset-current-node-syntax enables parsing modern syntax features in Babel transformations","babel-preset-current-node-syntax returns empty plugins list for non-Babel 7 versions"],"goal":"configure babel plugins for current node version","kind":"HOW","packages":["pkg:npm/babel-preset-current-node-syntax@1.2.0"],"schemaVersion":1,"symbols":["babel-preset-current-node-syntax"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/babel-preset-current-node-syntax@1.2.0"],"schemaVersion":1,"subject":"pkg:npm/babel-preset-current-node-syntax@1.2.0","symbols":["babel-preset-current-node-syntax"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-babel-preset-current-node-syntax",
  "version": "1.0.0",
  "description": "configure babel plugins for current node version",
  "type": "module",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/core": "7.24.0",
    "babel-preset-current-node-syntax": "1.2.0"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "configure babel plugins for current node version",
  "kind": "HOW",
  "packages": [
    "pkg:npm/babel-preset-current-node-syntax@1.2.0"
  ],
  "symbols": [
    "babel-preset-current-node-syntax"
  ]
}
src/index.js
import babel from '@babel/core';
import currentPreset from 'babel-preset-current-node-syntax';

/**
 * Returns the preset configuration object for a given Babel API/version context.
 *
 * @param {object} [api={ version: babel.version }] - Babel API object with version string.
 * @returns {object} The preset object containing the plugins array.
 */
export function getPresetConfig(api = { version: babel.version }) {
  return currentPreset(api);
}

/**
 * Transforms JavaScript code using Babel configured with babel-preset-current-node-syntax.
 *
 * @param {string} code - The input source code.
 * @param {object} [options={}] - Additional Babel transform options.
 * @returns {string} The transformed code string.
 */
export function transformWithPreset(code, options = {}) {
  const result = babel.transformSync(code, {
    presets: [currentPreset],
    filename: 'input.js',
    configFile: false,
    babelrc: false,
    ...options
  });
  return result ? result.code : '';
}

/**
 * Checks if a specific syntax plugin is enabled for the current Node runtime.
 *
 * @param {string} pluginName - The name of the syntax plugin (e.g. 'optional-chaining', 'bigint').
 * @returns {boolean} True if the plugin is included in the preset.
 */
export function hasPlugin(pluginName) {
  const config = getPresetConfig();
  const pluginSuffix = `@babel/plugin-syntax-${pluginName}`;
  return config.plugins.some((pluginPath) => pluginPath.includes(pluginSuffix));
}
test/contract.mjs
import assert from 'node:assert';
import babel from '@babel/core';
import currentPreset from 'babel-preset-current-node-syntax';
import { getPresetConfig, transformWithPreset, hasPlugin } from '../src/index.js';

// 1. babel-preset-current-node-syntax returns an object with a plugins array when called with Babel 7 API
{
  const config = getPresetConfig({ version: '7.24.0' });
  assert(config !== null && typeof config === 'object', 'Config should be an object');
  assert(Array.isArray(config.plugins), 'config.plugins should be an array');
  assert(config.plugins.length > 0, 'config.plugins should contain enabled syntax plugins for current Node');
}

// 2. babel-preset-current-node-syntax includes syntax plugins supported by the current Node.js runtime
{
  assert.strictEqual(hasPlugin('optional-chaining'), true, 'Should include optional-chaining plugin');
  assert.strictEqual(hasPlugin('nullish-coalescing-operator'), true, 'Should include nullish-coalescing plugin');
  assert.strictEqual(hasPlugin('numeric-separator'), true, 'Should include numeric-separator plugin');
}

// 3. babel-preset-current-node-syntax enables parsing modern syntax features in Babel transformations
{
  const code = `
    const obj = { prop: 42 };
    const value = obj?.prop ?? 0;
    const spread = { ...obj, extra: 1_000 };
  `;
  const transformed = transformWithPreset(code);
  assert(typeof transformed === 'string', 'Transformed result should be a string');
  assert(transformed.includes('prop: 42'), 'Transformed code should preserve input semantics');
}

// 4. babel-preset-current-node-syntax returns empty plugins list for non-Babel 7 versions
{
  const config = currentPreset({ version: '8.0.0' });
  assert(config !== null && typeof config === 'object');
  assert(Array.isArray(config.plugins));
  assert.strictEqual(config.plugins.length, 0, 'Babel 8 does not need Babel 7 syntax plugins');
}

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

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