@tiptap/extension-text-style 3.11.0

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/%40tiptap/extension-text-style@3.11.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40tiptap/extension-text-style@3.11.0

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.

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{
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  "version": "1.0.0",
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      "version": "1.0.0",
      "license": "MIT-0",
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      }
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      "license": "MIT",
      "funding": {
        "type": "github",
        "url": "https://github.com/sponsors/ueberdosis"
      },
      "peerDependencies": {
        "@tiptap/pm": "^3.11.0"
      }
    },
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        "type": "github",
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      "license": "MIT",
      "peer": true
    }
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@tiptap/core": "3.11.0",
    "@tiptap/extension-text-style": "3.11.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40tiptap/extension-text-style@3.11.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40tiptap/extension-text-style@3.11.0"
  ]
}

import assert from "node:assert/strict";
import { Node, getSchema } from "@tiptap/core";
import {
  TextStyle,
  Color,
  BackgroundColor,
  FontFamily,
  FontSize,
  LineHeight,
  TextStyleKit,
} from "@tiptap/extension-text-style";

// Contract assertion 1: Verify extension identities and mark attributes
assert.strictEqual(TextStyle.name, "textStyle");
assert.strictEqual(TextStyle.type, "mark");
assert.strictEqual(typeof TextStyle.configure, "function");

// Contract assertion 2: Verify configuration with HTMLAttributes
const configured = TextStyle.configure({
  HTMLAttributes: { class: "custom-styled-text" },
  mergeNestedSpanStyles: false,
});
assert.strictEqual(configured.name, "textStyle");
assert.strictEqual(configured.options.HTMLAttributes.class, "custom-styled-text");
assert.strictEqual(configured.options.mergeNestedSpanStyles, false);

// Contract assertion 3: Verify companion text style extensions are properly exported
assert.strictEqual(Color.name, "color");
assert.strictEqual(BackgroundColor.name, "backgroundColor");
assert.strictEqual(FontFamily.name, "fontFamily");
assert.strictEqual(FontSize.name, "fontSize");
assert.strictEqual(LineHeight.name, "lineHeight");
assert.strictEqual(TextStyleKit.name, "textStyleKit");

// Contract assertion 4: Verify schema compilation and mark creation
const Doc = Node.create({ name: "doc", topNode: true, content: "block+" });
const Paragraph = Node.create({ name: "paragraph", group: "block", content: "inline*" });
const Text = Node.create({ name: "text", group: "inline" });

const schema = getSchema([Doc, Paragraph, Text, TextStyle]);
assert(schema.marks.textStyle, "textStyle mark exists in schema");
assert.strictEqual(schema.marks.textStyle.name, "textStyle");

const mark = schema.marks.textStyle.create();
assert.strictEqual(mark.type.name, "textStyle");

const textNode = schema.text("Verified textStyle mark", [mark]);
assert.strictEqual(textNode.text, "Verified textStyle mark");
assert.strictEqual(textNode.marks.length, 1);
assert.strictEqual(textNode.marks[0].type.name, "textStyle");

console.log("PASS: @tiptap/extension-text-style contract verified");