@tiptap/pm 3.11.0: Node

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/pm.Node in pkg:npm/%40tiptap/pm@3.11.0
Kind: HOW

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

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:sha256:8bd1e30d28dc574fc879398c3502d5ce4924d4fbda004cd2d3b10e5d872d1788","contract":["Node is a class constructor exported by @tiptap/pm/model","schema.node creates a Node instance representing a document element","Node properties reflect structural kind, text content, and child count","Node.fromJSON deserializes a JSON object into a valid Node instance","node.toJSON serializes the node hierarchy into a plain JSON object","node.eq performs deep structural equality comparison between nodes","node.cut extracts a slice of the node within the specified character positions","node.forEach iterates over the direct children of the node","Node.fromJSON throws RangeError when node type is unrecognized in schema"],"goal":"verify @tiptap/pm.Node in pkg:npm/%40tiptap/pm@3.11.0","kind":"HOW","packages":["pkg:npm/%40tiptap/pm@3.11.0"],"schemaVersion":1,"symbols":["@tiptap/pm.Node"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40tiptap/pm@3.11.0"],"schemaVersion":1,"subject":"pkg:npm/%40tiptap/pm@3.11.0","symbols":["@tiptap/pm.Node"],"verifierAdapter":"node-typescript@1"}

import { Node } from '@tiptap/pm/model';
import { schema } from '@tiptap/pm/schema-basic';

export { Node, schema };
export default Node;

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      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
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      "license": "MIT"
    },
    "node_modules/w3c-keyname": {
      "version": "2.2.8",
      "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
      "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-tiptap-pm-node",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "@tiptap/pm": "3.11.0"
  }
}

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

import assert from 'node:assert/strict';
import { Node, schema } from '../index.mjs';

// 1. Node is a class constructor exported by @tiptap/pm/model
{
  assert.equal(typeof Node, 'function');
}

// 2. schema.node creates a Node instance representing a document element
{
  const textNode = schema.text('Hello World');
  const paragraph = schema.node('paragraph', null, [textNode]);
  const doc = schema.node('doc', null, [paragraph]);

  assert.ok(textNode instanceof Node);
  assert.ok(paragraph instanceof Node);
  assert.ok(doc instanceof Node);
}

// 3. Node properties reflect structural kind, text content, and child count
{
  const textNode = schema.text('Sample text');
  const paragraph = schema.node('paragraph', null, [textNode]);
  const doc = schema.node('doc', null, [paragraph]);

  assert.equal(doc.isBlock, true);
  assert.equal(doc.isInline, false);
  assert.equal(doc.isText, false);
  assert.equal(paragraph.isBlock, true);
  assert.equal(textNode.isInline, true);
  assert.equal(textNode.isText, true);

  assert.equal(doc.textContent, 'Sample text');
  assert.equal(paragraph.textContent, 'Sample text');
  assert.equal(textNode.textContent, 'Sample text');
  assert.equal(doc.childCount, 1);
  assert.ok(doc.child(0).eq(paragraph));
}

// 4. Node.fromJSON deserializes a JSON object into a valid Node instance
{
  const json = {
    type: 'doc',
    content: [
      {
        type: 'paragraph',
        content: [
          {
            type: 'text',
            text: 'Deserialized content'
          }
        ]
      }
    ]
  };
  const doc = Node.fromJSON(schema, json);
  assert.ok(doc instanceof Node);
  assert.equal(doc.type.name, 'doc');
  assert.equal(doc.textContent, 'Deserialized content');
}

// 5. node.toJSON serializes the node hierarchy into a plain JSON object
{
  const textNode = schema.text('Serialized');
  const p = schema.node('paragraph', null, [textNode]);
  const doc = schema.node('doc', null, [p]);

  const json = doc.toJSON();
  assert.equal(json.type, 'doc');
  assert.equal(Array.isArray(json.content), true);
  assert.equal(json.content[0].type, 'paragraph');
  assert.equal(json.content[0].content[0].text, 'Serialized');
}

// 6. node.eq performs deep structural equality comparison between nodes
{
  const doc1 = schema.node('doc', null, [
    schema.node('paragraph', null, [schema.text('Match')])
  ]);
  const doc2 = schema.node('doc', null, [
    schema.node('paragraph', null, [schema.text('Match')])
  ]);
  const doc3 = schema.node('doc', null, [
    schema.node('paragraph', null, [schema.text('Different')])
  ]);

  assert.equal(doc1.eq(doc2), true);
  assert.equal(doc1.eq(doc3), false);
}

// 7. node.cut extracts a slice of the node within the specified character positions
{
  const p = schema.node('paragraph', null, [schema.text('Antigravity CodeSampleX')]);
  const doc = schema.node('doc', null, [p]);
  const cutDoc = doc.cut(1, 12);

  assert.ok(cutDoc instanceof Node);
  assert.equal(cutDoc.textContent, 'Antigravity');
}

// 8. node.forEach iterates over the direct children of the node
{
  const p1 = schema.node('paragraph', null, [schema.text('First')]);
  const p2 = schema.node('paragraph', null, [schema.text('Second')]);
  const doc = schema.node('doc', null, [p1, p2]);

  const collected = [];
  doc.forEach((child, offset, index) => {
    collected.push({ text: child.textContent, offset, index });
  });

  assert.equal(collected.length, 2);
  assert.equal(collected[0].text, 'First');
  assert.equal(collected[0].index, 0);
  assert.equal(collected[1].text, 'Second');
  assert.equal(collected[1].index, 1);
}

// 9. Node.fromJSON throws RangeError when node type is unrecognized in schema
{
  assert.throws(
    () => Node.fromJSON(schema, { type: 'unknown_type' }),
    { name: 'RangeError' }
  );
}

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