CodeSampleX

Sample

@rollup/plugin-commonjs 28.0.7: dynamicRequireTargets

Verified sample for npm @rollup/plugin-commonjs 28.0.7: dynamicRequireTargets. The contract ran on node 22 · linux debian/x64 · docker and passed.

sha256:3bac020ad2c6937c671060a36f638dc0157aa3d3d425b110efe2bdbd53f324cd

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
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…		 2026-09-03

Case

HOW
Goal
verify dynamicRequireTargets in pkg:npm/%40rollup/plugin-commonjs@28.0.7
Packages
Symbols
  • dynamicRequireTargets
Environment
node 22.23.2
Created
2026-09-03T09:39:50Z

Contract

  1. CommonJS dynamic require calls fail at runtime with an error prompting configuration of dynamicRequireTargets when dynamicRequireTargets is not configured.
  2. Configuring dynamicRequireTargets with glob patterns bundles matching CommonJS modules into the dynamic module registry and allows dynamic require calls to successfully resolve and execute them at runtime.
  3. Dynamic require calls across multiple target modules correctly preserve exported functions, objects, and return values.
  4. Negation glob patterns prefixed with '!' in dynamicRequireTargets exclude specified modules from being bundled, causing dynamic require calls for those excluded files to throw an error.
  5. Dynamic require calls targeting unconfigured or nonexistent file paths throw an error indicating the file could not be dynamically required.

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs
  • test/fixtures/caller.cjs
  • test/fixtures/dynamic/greeter.cjs
  • test/fixtures/dynamic/ignored.cjs
  • test/fixtures/dynamic/math.cjs
  • test/fixtures/entry.mjs

Download the source artifact (tar.gz)

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 dynamicRequireTargets in pkg:npm/%40rollup/plugin-commonjs@28.0.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40rollup/plugin-commonjs@28.0.7
Demonstrate these symbols/APIs:
  - dynamicRequireTargets
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:sha256:26ccdd503ee32a7b55241564e900cb2b884cc6a39e8136c72b86a9c07838c4d6","constraints":{"executionContext":"node"},"contract":["CommonJS dynamic require calls fail at runtime with an error prompting configuration of dynamicRequireTargets when dynamicRequireTargets is not configured.","Configuring dynamicRequireTargets with glob patterns bundles matching CommonJS modules into the dynamic module registry and allows dynamic require calls to successfully resolve and execute them at runtime.","Dynamic require calls across multiple target modules correctly preserve exported functions, objects, and return values.","Negation glob patterns prefixed with '!' in dynamicRequireTargets exclude specified modules from being bundled, causing dynamic require calls for those excluded files to throw an error.","Dynamic require calls targeting unconfigured or nonexistent file paths throw an error indicating the file could not be dynamically required."],"goal":"verify dynamicRequireTargets in pkg:npm/%40rollup/plugin-commonjs@28.0.7","kind":"HOW","packages":["pkg:npm/%40rollup/plugin-commonjs@28.0.7"],"schemaVersion":1,"symbols":["dynamicRequireTargets"]},"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/%40rollup/plugin-commonjs@28.0.7"],"schemaVersion":1,"subject":"pkg:npm/%40rollup/plugin-commonjs@28.0.7","symbols":["dynamicRequireTargets"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-rollup-plugin-commonjs-dynamic-require-targets",
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  "lockfileVersion": 3,
  "requires": true,
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      "name": "sample-rollup-plugin-commonjs-dynamic-require-targets",
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      "license": "MIT",
      "engines": {
        "node": ">=12"
      },
      "funding": {
        "url": "https://github.com/sponsors/jonschlinkert"
      }
    },
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      "bin": {
        "rollup": "dist/bin/rollup"
      },
      "engines": {
        "node": ">=18.0.0",
        "npm": ">=8.0.0"
      },
      "optionalDependencies": {
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      "license": "MIT"
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}
package.json
{
  "name": "sample-rollup-plugin-commonjs-dynamic-require-targets",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of @rollup/plugin-commonjs dynamicRequireTargets",
  "type": "module",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@rollup/plugin-commonjs": "28.0.7",
    "rollup": "4.34.8"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify dynamicRequireTargets in pkg:npm/%40rollup/plugin-commonjs@28.0.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40rollup/plugin-commonjs@28.0.7"
  ],
  "symbols": [
    "dynamicRequireTargets"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
import * as rollup from 'rollup';
import commonjs from '@rollup/plugin-commonjs';

/**
 * Bundles code using Rollup with @rollup/plugin-commonjs configured,
 * then dynamically imports the resulting ESM bundle.
 *
 * @param {string} inputPath - Entry point file path.
 * @param {object} [pluginOptions] - Options passed to @rollup/plugin-commonjs.
 * @returns {Promise<any>} The evaluated module namespace.
 */
export async function bundleWithCommonjs(inputPath, pluginOptions = {}) {
  const bundle = await rollup.rollup({
    input: inputPath,
    plugins: [
      commonjs(pluginOptions)
    ]
  });

  const { output } = await bundle.generate({ format: 'esm' });
  const base64Uri = 'data:text/javascript;base64,' + Buffer.from(output[0].code).toString('base64');
  return await import(base64Uri);
}
test/contract.mjs
import assert from 'node:assert/strict';
import { bundleWithCommonjs } from '../src/index.js';

const entryPath = 'test/fixtures/entry.mjs';

// 1. Without dynamicRequireTargets, dynamic require calls throw at runtime
{
  const mod = await bundleWithCommonjs(entryPath);
  assert.throws(
    () => mod.loadModule('greeter.cjs'),
    (err) =>
      err instanceof Error &&
      err.message.includes('Could not dynamically require') &&
      err.message.includes('dynamicRequireTargets')
  );
}

// 2. With dynamicRequireTargets matching glob pattern, modules are loaded dynamically
{
  const mod = await bundleWithCommonjs(entryPath, {
    dynamicRequireTargets: ['test/fixtures/dynamic/*.cjs']
  });

  const greeter = mod.loadModule('greeter.cjs');
  assert.equal(typeof greeter.greet, 'function');
  assert.equal(greeter.greet('CodeSampleX'), 'Hello, CodeSampleX!');

  const math = mod.loadModule('math.cjs');
  assert.equal(typeof math.add, 'function');
  assert.equal(math.add(10, 25), 35);

  const ignored = mod.loadModule('ignored.cjs');
  assert.equal(ignored.secret, 'ignored-secret');
}

// 3. Negation glob pattern prefixed with '!' excludes specified modules from bundling
{
  const mod = await bundleWithCommonjs(entryPath, {
    dynamicRequireTargets: [
      'test/fixtures/dynamic/*.cjs',
      '!test/fixtures/dynamic/ignored.cjs'
    ]
  });

  const greeter = mod.loadModule('greeter.cjs');
  assert.equal(greeter.greet('World'), 'Hello, World!');

  assert.throws(
    () => mod.loadModule('ignored.cjs'),
    (err) =>
      err instanceof Error &&
      err.message.includes('Could not dynamically require')
  );
}

// 4. Dynamic require for unconfigured or non-existent file path throws
{
  const mod = await bundleWithCommonjs(entryPath, {
    dynamicRequireTargets: ['test/fixtures/dynamic/*.cjs']
  });

  assert.throws(
    () => mod.loadModule('nonexistent.cjs'),
    (err) =>
      err instanceof Error &&
      err.message.includes('Could not dynamically require')
  );
}

console.log('Contract assertions passed successfully.');
test/fixtures/caller.cjs
function loadModule(name) {
  return require('./dynamic/' + name);
}

module.exports = { loadModule };
test/fixtures/dynamic/greeter.cjs
module.exports = {
  greet(name) {
    return 'Hello, ' + name + '!';
  }
};
test/fixtures/dynamic/ignored.cjs
module.exports = {
  secret: 'ignored-secret'
};
test/fixtures/dynamic/math.cjs
module.exports = {
  add(a, b) {
    return a + b;
  }
};
test/fixtures/entry.mjs
import { loadModule } from './caller.cjs';
export { loadModule };

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