CodeSampleX

示例

@babel/core 7.24.7: parseAsync

已验证示例 — npm @babel/core 7.24.7: parseAsync. contract 在 node 22 · linux debian/x64 · docker 上运行并通过： parseAsync parses JavaScript source code asynchronously…

sha256:a35da823a1c13984e9a3c8840481dc601234035ac43cc6ea4573f9a6f91a8a5b

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境 契约 阶段 运行日期
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-05

案例

HOW
目标
verify pkg:npm/%40babel/core@7.24.7
包
符号
  • @babel/core.parseAsync
环境
node 22.23.2
创建时间
2026-09-05T08:11:22Z

契约

  1. parseAsync parses JavaScript source code asynchronously into an AST File node with Program body
  2. parseAsync returns File AST with default sourceType module and program body containing parsed statements
  3. parseAsync supports parserOpts plugins such as jsx to parse syntax extensions asynchronously
  4. parseAsync populates tokens array when parserOpts.tokens is true
  5. parseAsync returns null when filename matches ignore pattern in options
  6. parseAsync rejects with a SyntaxError having BABEL_PARSE_ERROR code on invalid syntax
  7. parseAsync handles concurrent parse operations independently via Promise.all

文件

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

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 pkg:npm/%40babel/core@7.24.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.24.7
Demonstrate these symbols/APIs:
  - @babel/core.parseAsync
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - 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:sha256:822abc9b49725fd9bb3356f728f5ec576b1534960a90f4a1c3d8bf0d685b2f2c","constraints":{"executionContext":"node"},"contract":["parseAsync parses JavaScript source code asynchronously into an AST File node with Program body","parseAsync returns File AST with default sourceType module and program body containing parsed statements","parseAsync supports parserOpts plugins such as jsx to parse syntax extensions asynchronously","parseAsync populates tokens array when parserOpts.tokens is true","parseAsync returns null when filename matches ignore pattern in options","parseAsync rejects with a SyntaxError having BABEL_PARSE_ERROR code on invalid syntax","parseAsync handles concurrent parse operations independently via Promise.all"],"goal":"verify pkg:npm/%40babel/core@7.24.7","kind":"HOW","packages":["pkg:npm/%40babel/core@7.24.7"],"schemaVersion":1,"symbols":["@babel/core.parseAsync"]},"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/core@7.24.7"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.24.7","symbols":["@babel/core.parseAsync"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-parseasync",
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package.json
{
  "name": "sample-babel-parseasync",
  "version": "1.0.0",
  "description": "verify @babel/core.parseAsync in pkg:npm/%40babel/core@7.24.7",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/core": "7.24.7"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/core@7.24.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.24.7"
  ],
  "symbols": [
    "@babel/core.parseAsync"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const babel = require('@babel/core');

/**
 * Parses JavaScript source code asynchronously using @babel/core.parseAsync.
 *
 * @param {string} code - The source code to parse.
 * @param {object} [options={}] - Optional Babel configuration options.
 * @returns {Promise<object|null>} The parsed AST or null if ignored.
 */
async function parseCodeAsync(code, options = {}) {
  const defaultOptions = {
    configFile: false,
    babelrc: false,
    ...options
  };
  return babel.parseAsync(code, defaultOptions);
}

/**
 * Parses JSX code asynchronously using @babel/core.parseAsync with jsx parser plugin.
 *
 * @param {string} code - The JSX source code to parse.
 * @returns {Promise<object|null>} The parsed AST.
 */
async function parseJsxAsync(code) {
  return parseCodeAsync(code, {
    parserOpts: {
      plugins: ['jsx']
    }
  });
}

/**
 * Parses code asynchronously and extracts lexical tokens.
 *
 * @param {string} code - The source code to tokenize and parse.
 * @returns {Promise<Array<object>>} Array of AST tokens.
 */
async function extractTokensAsync(code) {
  const ast = await parseCodeAsync(code, {
    parserOpts: {
      tokens: true
    }
  });
  return ast && ast.tokens ? ast.tokens : [];
}

module.exports = {
  parseCodeAsync,
  parseJsxAsync,
  extractTokensAsync
};
test/contract.js
const assert = require('assert');
const babel = require('@babel/core');
const { parseCodeAsync, parseJsxAsync, extractTokensAsync } = require('../src/index');

(async () => {
  // 1. parseAsync parses JavaScript source code asynchronously into an AST File node with Program body
  {
    const ast = await parseCodeAsync('const answer = 42;');
    assert(ast !== null, 'AST should not be null');
    assert.strictEqual(ast.type, 'File', 'Root node must be File');
    assert.strictEqual(ast.program.type, 'Program', 'Root node must contain a Program node');
    assert.strictEqual(ast.program.body.length, 1, 'Program body must contain 1 statement');
    assert.strictEqual(ast.program.body[0].type, 'VariableDeclaration');
    assert.strictEqual(ast.program.body[0].declarations[0].id.name, 'answer');
  }

  // 2. parseAsync returns File AST with default sourceType module and program body containing parsed statements
  {
    const ast = await parseCodeAsync('export const name = example;');
    assert(ast !== null, 'AST should not be null');
    assert.strictEqual(ast.type, 'File');
    assert.strictEqual(ast.program.sourceType, 'module', 'Default sourceType must be module');
    assert.strictEqual(ast.program.body[0].type, 'ExportNamedDeclaration');
  }

  // 3. parseAsync supports parserOpts plugins such as jsx to parse syntax extensions asynchronously
  {
    const ast = await parseJsxAsync('const element = <span className="greeting">Hello</span>;');
    assert(ast !== null, 'AST should not be null');
    assert.strictEqual(ast.type, 'File');
    assert.strictEqual(ast.program.body[0].type, 'VariableDeclaration');
    const init = ast.program.body[0].declarations[0].init;
    assert.strictEqual(init.type, 'JSXElement');
    assert.strictEqual(init.openingElement.name.name, 'span');
  }

  // 4. parseAsync populates tokens array when parserOpts.tokens is true
  {
    const tokens = await extractTokensAsync('let count = 0;');
    assert(Array.isArray(tokens), 'Tokens must be an array');
    assert(tokens.length > 0, 'Tokens array must not be empty');
    assert(tokens.some((t) => t.value === 'count' || (t.type && t.type.label === 'name')));
  }

  // 5. parseAsync returns null when filename matches ignore pattern in options
  {
    const result = await parseCodeAsync('const ignored = true;', {
      filename: 'ignored-file.js',
      ignore: [/ignored-file/]
    });
    assert.strictEqual(result, null, 'Ignored file must return null AST');
  }

  // 6. parseAsync rejects with a SyntaxError having BABEL_PARSE_ERROR code on invalid syntax
  {
    let rejected = false;
    try {
      await parseCodeAsync('const invalid = ;');
    } catch (err) {
      rejected = true;
      assert(err instanceof SyntaxError, 'Error must be an instance of SyntaxError');
      assert.strictEqual(err.code, 'BABEL_PARSE_ERROR', 'Error code must be BABEL_PARSE_ERROR');
    }
    assert(rejected, 'Invalid syntax must cause rejection');
  }

  // 7. parseAsync handles concurrent parse operations independently via Promise.all
  {
    const inputs = [
      'const a = 1;',
      'const b = 2;',
      'const c = 3;'
    ];
    const results = await Promise.all(inputs.map((code) => parseCodeAsync(code)));
    assert.strictEqual(results.length, 3, 'Must return results for all inputs');
    results.forEach((ast, idx) => {
      assert(ast !== null, `Result ${idx} must not be null`);
      assert.strictEqual(ast.program.body[0].declarations[0].init.value, idx + 1);
    });
  }

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

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