CodeSampleX

示例

puppeteer-core 24.4.0

已验证示例 — npm puppeteer-core 24.4.0. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： assert puppeteer._isPuppeteerCore is true

sha256:324d1beade001aad063805874760963ec2d7c18a6e8eb473168ab5637714a00c

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 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…		 2026-08-23

案例

HOW
目标
verify pkg:npm/puppeteer-core@24.4.0
包
创建时间
2026-08-23T15:23:47Z

契约

  1. assert puppeteer._isPuppeteerCore is true
  2. assert puppeteer.launch requires executablePath or channel in puppeteer-core
  3. assert puppeteer.connect requires exactly one connection option
  4. assert puppeteer.launch rejects with descriptive error when executablePath is invalid
  5. assert KnownDevices provides mobile device descriptors including iPhone 15
  6. assert PredefinedNetworkConditions provides network emulation profiles including Slow 3G and Fast 4G
  7. assert puppeteer.defaultArgs generates standard Chromium launch arguments including user flags
  8. assert TimeoutError, PuppeteerError, and ProtocolError are exported Error subclasses

文件

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • 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 pkg:npm/puppeteer-core@24.4.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/puppeteer-core@24.4.0

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:sha256:4ec7e0a2bdec4e5e04d2f9371e36539a77fd11f8e60fab339d836b9cc99649a9","contract":["assert puppeteer._isPuppeteerCore is true","assert puppeteer.launch requires executablePath or channel in puppeteer-core","assert puppeteer.connect requires exactly one connection option","assert puppeteer.launch rejects with descriptive error when executablePath is invalid","assert KnownDevices provides mobile device descriptors including iPhone 15","assert PredefinedNetworkConditions provides network emulation profiles including Slow 3G and Fast 4G","assert puppeteer.defaultArgs generates standard Chromium launch arguments including user flags","assert TimeoutError, PuppeteerError, and ProtocolError are exported Error subclasses"],"goal":"verify pkg:npm/puppeteer-core@24.4.0","kind":"HOW","packages":["pkg:npm/puppeteer-core@24.4.0"],"schemaVersion":1},"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/puppeteer-core@24.4.0"],"schemaVersion":1,"subject":"pkg:npm/puppeteer-core@24.4.0","verifierAdapter":"node-typescript@1"}
index.js
import puppeteer, {
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
} from 'puppeteer-core';

/**
 * Checks if the loaded puppeteer module is puppeteer-core.
 *
 * @returns {boolean} True if puppeteer-core.
 */
export function isPuppeteerCore() {
  return puppeteer._isPuppeteerCore === true;
}

/**
 * Gets a known mobile or tablet device descriptor by name.
 *
 * @param {string} deviceName - Name of the device.
 * @returns {import('puppeteer-core').Device | undefined} Device descriptor object or undefined.
 */
export function getDeviceDescriptor(deviceName) {
  return KnownDevices[deviceName];
}

/**
 * Gets predefined network emulation conditions.
 *
 * @param {'Slow 3G' | 'Fast 3G' | 'Slow 4G' | 'Fast 4G'} conditionName - Network condition name.
 * @returns {import('puppeteer-core').NetworkConditions | undefined} Network condition metrics.
 */
export function getNetworkCondition(conditionName) {
  return PredefinedNetworkConditions[conditionName];
}

/**
 * Gets default launch arguments computed for Chromium by Puppeteer.
 *
 * @param {import('puppeteer-core').PuppeteerNodeLaunchOptions} [options] - Launch options.
 * @returns {string[]} List of command-line flags.
 */
export function getChromiumDefaultArgs(options) {
  return puppeteer.defaultArgs(options);
}

export {
  puppeteer,
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
};
package-lock.json
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package.json
{
  "name": "sample-puppeteer-core-verification",
  "version": "1.0.0",
  "description": "Clean-room sample verifying pkg:npm/puppeteer-core@24.4.0",
  "main": "index.js",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "puppeteer-core": "24.4.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/puppeteer-core@24.4.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/puppeteer-core@24.4.0"
  ]
}
test/contract.mjs
import assert from 'node:assert';
import puppeteer, {
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
} from 'puppeteer-core';
import {
  isPuppeteerCore,
  getDeviceDescriptor,
  getNetworkCondition,
  getChromiumDefaultArgs
} from '../index.js';

// 1. puppeteer._isPuppeteerCore flag verification
assert.strictEqual(isPuppeteerCore(), true, 'isPuppeteerCore() must return true');
assert.strictEqual(puppeteer._isPuppeteerCore, true, 'puppeteer._isPuppeteerCore must be true');

// 2. puppeteer.launch without executablePath or channel rejects in puppeteer-core
await assert.rejects(
  async () => {
    await puppeteer.launch();
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /An `executablePath` or `channel` must be specified for `puppeteer-core`/);
    return true;
  }
);

// 3. puppeteer.connect requires connection options
await assert.rejects(
  async () => {
    await puppeteer.connect({});
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /Exactly one of browserWSEndpoint, browserURL or transport must be passed to puppeteer.connect/);
    return true;
  }
);

// 4. puppeteer.launch with non-existent executablePath rejects
await assert.rejects(
  async () => {
    await puppeteer.launch({ executablePath: '/nonexistent/mock/path' });
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /Browser was not found at the configured executablePath/);
    return true;
  }
);

// 5. KnownDevices verification
const iphone = getDeviceDescriptor('iPhone 15');
assert(iphone, 'KnownDevices["iPhone 15"] must be defined');
assert.strictEqual(iphone.name, 'iPhone 15');
assert.strictEqual(typeof iphone.userAgent, 'string');
assert(iphone.userAgent.includes('iPhone OS 17_5'));
assert.deepStrictEqual(iphone.viewport, {
  width: 393,
  height: 659,
  deviceScaleFactor: 3,
  isMobile: true,
  hasTouch: true,
  isLandscape: false
});

// 6. PredefinedNetworkConditions verification
const slow3G = getNetworkCondition('Slow 3G');
assert.deepStrictEqual(slow3G, {
  download: 50000,
  upload: 50000,
  latency: 2000
});
const fast4G = getNetworkCondition('Fast 4G');
assert.deepStrictEqual(fast4G, {
  download: 1012500,
  upload: 168750,
  latency: 165
});

// 7. puppeteer.defaultArgs argument generation
const defaultArgs = getChromiumDefaultArgs({
  args: ['--custom-test-flag']
});
assert(Array.isArray(defaultArgs));
assert(defaultArgs.includes('--custom-test-flag'));
assert(defaultArgs.some(arg => arg.startsWith('--disable-background-networking')));

// 8. Error classes
const timeoutErr = new TimeoutError('Navigation timeout of 30000 ms exceeded');
assert(timeoutErr instanceof Error);
assert.strictEqual(timeoutErr.name, 'TimeoutError');
assert.strictEqual(timeoutErr.message, 'Navigation timeout of 30000 ms exceeded');

const puppeteerErr = new PuppeteerError('General puppeteer error');
assert(puppeteerErr instanceof Error);
assert.strictEqual(puppeteerErr.name, 'PuppeteerError');

const protocolErr = new ProtocolError('Protocol error message');
assert(protocolErr instanceof Error);
assert.strictEqual(protocolErr.name, 'ProtocolError');

console.log('Contract assertions passed.');

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