@tiptap/extension-underline 3.11.0: name

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 @tiptap/extension-underline.name in pkg:npm/%40tiptap/extension-underline@3.11.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40tiptap/extension-underline@3.11.0
Demonstrate these symbols/APIs:
  - @tiptap/extension-underline.name

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.

{"case":{"caseId":"case:sha256:4c8ecd6dfbb264cfc8f2dd1b9875457ec8676357f3a4529a26bd7e59a7d1da6a","contract":["Underline is exported as both default and named export","Underline.name is the exact string 'underline'","Underline is a mark extension with type 'mark'","Underline config contains valid name, addOptions, parseHTML, and renderHTML","Configured Underline extension preserves extension name 'underline'","Helper functions expose Underline extension and correct extension name"],"goal":"verify @tiptap/extension-underline.name in pkg:npm/%40tiptap/extension-underline@3.11.0","kind":"HOW","packages":["pkg:npm/%40tiptap/extension-underline@3.11.0"],"schemaVersion":1,"symbols":["@tiptap/extension-underline.name"]},"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/%40tiptap/extension-underline@3.11.0"],"schemaVersion":1,"subject":"pkg:npm/%40tiptap/extension-underline@3.11.0","symbols":["@tiptap/extension-underline.name"],"verifierAdapter":"node-typescript@1"}

import { Underline } from '@tiptap/extension-underline';

/**
 * Returns the name of the Underline extension.
 *
 * @returns {string} The extension name ('underline').
 */
export function getUnderlineExtensionName() {
  return Underline.name;
}

/**
 * Configures the Underline extension with custom options.
 *
 * @param {object} [options={}] - Extension options such as HTMLAttributes.
 * @returns {object} Configured Underline extension instance.
 */
export function createUnderlineExtension(options = {}) {
  return Underline.configure(options);
}

export { Underline };
export default Underline;

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  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-tiptap-extension-underline",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
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      }
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      "license": "MIT",
      "peer": true,
      "funding": {
        "type": "github",
        "url": "https://github.com/sponsors/ueberdosis"
      },
      "peerDependencies": {
        "@tiptap/pm": "3.31.3"
      }
    },
    "node_modules/@tiptap/extension-underline": {
      "version": "3.11.0",
      "resolved": "https://registry.npmjs.org/@tiptap/extension-underline/-/extension-underline-3.11.0.tgz",
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      "license": "MIT",
      "funding": {
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      "peerDependencies": {
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        "url": "https://github.com/sponsors/ueberdosis"
      }
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      "peer": true,
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        "prosemirror-view": "^1.0.0"
      }
    },
    "node_modules/prosemirror-history": {
      "version": "1.5.0",
      "resolved": "https://registry.npmjs.org/prosemirror-history/-/prosemirror-history-1.5.0.tgz",
      "integrity": "sha512-zlzTiH01eKA55UAf1MEjtssJeHnGxO0j4K4Dpx+gnmX9n+SHNlDqI2oO1Kv1iPN5B1dm5fsljCfqKF9nFL6HRg==",
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      "peer": true,
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      }
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      "peer": true
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      "license": "MIT",
      "peer": true
    }
  }
}

{
  "name": "sample-tiptap-extension-underline",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "main": "index.mjs",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@tiptap/extension-underline": "3.11.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @tiptap/extension-underline.name in pkg:npm/%40tiptap/extension-underline@3.11.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40tiptap/extension-underline@3.11.0"
  ],
  "symbols": [
    "@tiptap/extension-underline.name"
  ]
}

import assert from 'node:assert/strict';
import UnderlineDefault, { Underline } from '@tiptap/extension-underline';
import { getUnderlineExtensionName, createUnderlineExtension } from '../index.mjs';

// 1. Underline is exported as both default and named export
assert.ok(Underline, 'Underline named export must be defined');
assert.strictEqual(UnderlineDefault, Underline, 'Default export must match named export Underline');

// 2. Underline.name is the exact string 'underline'
assert.strictEqual(typeof Underline.name, 'string', 'Underline.name must be a string');
assert.strictEqual(Underline.name, 'underline', 'Underline.name must be "underline"');

// 3. Underline is a mark extension with type 'mark'
assert.strictEqual(Underline.type, 'mark', 'Underline extension type must be "mark"');

// 4. Underline config object matches extension specification
assert.strictEqual(typeof Underline.config, 'object', 'Underline.config must be an object');
assert.strictEqual(Underline.config.name, 'underline', 'Underline.config.name must be "underline"');
assert.strictEqual(typeof Underline.config.addOptions, 'function', 'addOptions must be a function');
assert.strictEqual(typeof Underline.config.parseHTML, 'function', 'parseHTML must be a function');
assert.strictEqual(typeof Underline.config.renderHTML, 'function', 'renderHTML must be a function');

// 5. Configured Underline extension preserves extension name
const configured = Underline.configure({ HTMLAttributes: { class: 'custom-underline' } });
assert.strictEqual(configured.name, 'underline', 'Configured extension must preserve name "underline"');

// 6. Helper functions expose extension and correct name
assert.strictEqual(getUnderlineExtensionName(), 'underline', 'getUnderlineExtensionName must return "underline"');
const helperExtension = createUnderlineExtension();
assert.strictEqual(helperExtension.name, 'underline', 'createUnderlineExtension must return extension named "underline"');

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