markdown-it 14.3.1: render

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 render in pkg:npm/markdown-it@14.3.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/markdown-it@14.3.1
Demonstrate these symbols/APIs:
  - render

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:b73ce062f5d20f9cadd3f5fcd593b3930cdd2b7678e48af95973f261d7e8a3aa","contract":["markdown-it instance exports render as a function","render converts markdown headings to h1 and h2 HTML elements","render converts emphasis markers to strong and em HTML elements","render converts markdown links to HTML anchor tags with href attribute","render converts unordered and ordered list syntax into HTML lists","render returns an empty string when given an empty input string","module index wrapper render matches markdown-it instance render output"],"goal":"verify render in pkg:npm/markdown-it@14.3.1","kind":"HOW","packages":["pkg:npm/markdown-it@14.3.1"],"schemaVersion":1,"symbols":["render"]},"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/markdown-it@14.3.1"],"schemaVersion":1,"subject":"pkg:npm/markdown-it@14.3.1","symbols":["render"],"verifierAdapter":"node-typescript@1"}

import MarkdownIt from 'markdown-it';

export const md = new MarkdownIt();

/**
 * Renders markdown text to HTML string using markdown-it.
 *
 * @param {string} src - Source markdown string.
 * @param {object} [env] - Environment sandbox object.
 * @returns {string} Rendered HTML.
 */
export function render(src, env) {
  return md.render(src, env);
}

export default MarkdownIt;

{
  "name": "sample-markdown-it-render",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-markdown-it-render",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "markdown-it": "14.3.1"
      }
    },
    "node_modules/argparse": {
      "version": "2.0.1",
      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
      "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
      "license": "Python-2.0"
    },
    "node_modules/entities": {
      "version": "4.5.0",
      "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
      "integrity": "sha512-V0hjH4dGPh9Ao5p0MoRY6BVqtwCjhz6vI5LT8AJ55H+4g9/4vbHx1I54fS0XuclLhDHArPQCiMjDxjaL8fPxhw==",
      "license": "BSD-2-Clause",
      "engines": {
        "node": ">=0.12"
      },
      "funding": {
        "url": "https://github.com/fb55/entities?sponsor=1"
      }
    },
    "node_modules/linkify-it": {
      "version": "5.0.2",
      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-5.0.2.tgz",
      "integrity": "sha512-ONTm2jCMAVZjgQa/Fy1kScXsuOoF5NPTsoFBdE1KVIZ2vAh/r9+Bqo+0jINCBYnavTPQZz38QzFTme79ENoN3Q==",
      "funding": [
        {
          "type": "github",
          "url": "https://github.com/sponsors/puzrin"
        },
        {
          "type": "github",
          "url": "https://github.com/sponsors/markdown-it"
        }
      ],
      "license": "MIT",
      "dependencies": {
        "uc.micro": "^2.0.0"
      }
    },
    "node_modules/markdown-it": {
      "version": "14.3.1",
      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-14.3.1.tgz",
      "integrity": "sha512-4Ej49aYTDFIQ+uBkfX8GBvJGccoARxxPep+7aWTs55ozbjQJpW9M26Fe53vnGgvLeVzva/amzjQQaQu9w0vMhA==",
      "funding": [
        {
          "type": "github",
          "url": "https://github.com/sponsors/puzrin"
        },
        {
          "type": "github",
          "url": "https://github.com/sponsors/markdown-it"
        }
      ],
      "license": "MIT",
      "dependencies": {
        "argparse": "^2.0.1",
        "entities": "^4.5.0",
        "linkify-it": "^5.0.2",
        "mdurl": "^2.0.0",
        "punycode.js": "^2.3.1",
        "uc.micro": "^2.1.0"
      },
      "bin": {
        "markdown-it": "bin/markdown-it.mjs"
      }
    },
    "node_modules/mdurl": {
      "version": "2.1.0",
      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-2.1.0.tgz",
      "integrity": "sha512-1+HBaOx0zi/dQWht8rNv9MYf9qqpqL/kxI0hXImU6Y547zM6Sni8BQibt7ifgMcYtQg41ao3Ivd6cnSM86inpg==",
      "license": "MIT"
    },
    "node_modules/punycode.js": {
      "version": "2.3.1",
      "resolved": "https://registry.npmjs.org/punycode.js/-/punycode.js-2.3.1.tgz",
      "integrity": "sha512-uxFIHU0YlHYhDQtV4R9J6a52SLx28BCjT+4ieh7IGbgwVJWO+km431c4yRlREUAsAmt/uMjQUyQHNEPf0M39CA==",
      "license": "MIT",
      "engines": {
        "node": ">=6"
      }
    },
    "node_modules/uc.micro": {
      "version": "2.1.0",
      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
      "integrity": "sha512-ARDJmphmdvUk6Glw7y9DQ2bFkKBHwQHLi2lsaH6PPmz/Ka9sFOBsBluozhDltWmnv9u/cF6Rt87znRTPV+yp/A==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-markdown-it-render",
  "version": "1.0.0",
  "type": "module",
  "main": "index.mjs",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "markdown-it": "14.3.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify render in pkg:npm/markdown-it@14.3.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/markdown-it@14.3.1"
  ],
  "symbols": [
    "render"
  ]
}

import assert from 'node:assert/strict';
import MarkdownIt from 'markdown-it';
import { render } from '../index.mjs';

const md = new MarkdownIt();

// 1. markdown-it instance exports render as a function
assert.equal(typeof md.render, 'function');
assert.equal(typeof render, 'function');

// 2. render converts markdown headings to h1 and h2 HTML elements
assert.equal(md.render('# Title\n## Subtitle'), '<h1>Title</h1>\n<h2>Subtitle</h2>\n');

// 3. render converts emphasis markers to strong and em HTML elements
assert.equal(md.render('**bold** and *italic*'), '<p><strong>bold</strong> and <em>italic</em></p>\n');

// 4. render converts markdown links to HTML anchor tags with href attribute
assert.equal(md.render('[example](https://example.com)'), '<p><a href="https://example.com">example</a></p>\n');

// 5. render converts unordered and ordered list syntax into HTML lists
assert.equal(md.render('- item 1\n- item 2'), '<ul>\n<li>item 1</li>\n<li>item 2</li>\n</ul>\n');
assert.equal(md.render('1. first\n2. second'), '<ol>\n<li>first</li>\n<li>second</li>\n</ol>\n');

// 6. render returns an empty string when given an empty input string
assert.equal(md.render(''), '');

// 7. module index wrapper render matches markdown-it instance render output
assert.equal(render('# Hello World'), md.render('# Hello World'));
assert.equal(render('**test**'), md.render('**test**'));

console.log('All markdown-it render contract assertions passed.');