mdxlayer

Transform your .mdx content into strongly typed, structured JSON and TypeScript declarations with minimal config. Built for performance, flexibility, and DX.

🚀 Features

• 🧠 Validates frontmatter with Tyne
• ⚡ Generates structured .json and .d.ts from .mdx content
• 🛠 Add computed fields with resolvedFields
• 📁 Language-based content grouping (en, es, all)
• 🔄 Watch mode for development
• ✅ Type-safe at every level
• 📦 Simple CLI: mdxlayer build & mdxlayer dev

📑 Requirements

• Node.js 18+ (ESM only)
• mdxlayer installed globally or locally
• MDX files must follow this rule: no spaces in filenames ✅ about.mdx ❌ about me.mdx

📦 Installation

pnpm add -D mdxlayer
# or
npm install -D mdxlayer
# or
yarn add -D mdxlayer

⚙️ Configuration

Create a mdxlayer.config.ts file:

import { defineConfig } from 'mdxlayer';
import { t } from 'tyne';

const ArticleSchema = t.object({
  title: t.string(),
  category: t.string(),
  subcategory: t.string(),
  publishedTime: t.string(),
  modifiedTime: t.string(),
  description: t.string(),
  authors: t.array(t.string()),
  avatar: t.string(),
  cover: t.string(),
  coverAlt: t.string(),
  check: t.boolean(),
  lang: t.string(),
  tags: t.array(t.string()),
});

export default defineConfig({
  docType: 'Articles',
  contentDir: 'content',
  frontmatterSchema: ArticleSchema,
  resolvedFields: {
    title_: { resolve: (doc) => doc.title, type: t.string() },
    slug: {
      resolve: (doc) => doc.file.replace(/\.mdx$/, ''),
      type: t.string(),
    },
  },
});

🧠 TypeScript Setup

Update your tsconfig.json:

{
  "compilerOptions": {
    "paths": {
      "mdxlayer/generated": ["./.mdxlayer/generated"]
    }
  },
  "include": ["./.mdxlayer/generated"]
}

📄 Example .mdx File

---
title: 'What Makes MDX Powerful'
category: 'tech'
subcategory: 'markdown'
publishedTime: '01-04-2025'
modifiedTime: '01-04-2025'
description: 'A deep dive into what makes MDX a game-changer for modern content.'
authors: ['Estarlincito']
avatar: '/assets/avatar.jpeg'
cover: '/covers/mdx.png'
coverAlt: 'MDX visual cover'
check: true
lang: 'en'
tags: ['mdx', 'content', 'markdown']
---

Hello!

<Introduction>

> Lorem ipsum dolor sit amet, consectetur adipiscing elit.

</Introduction>

<Audio src='/audio/intro.mp3' type='audio/mp3' />

> _"MDX is where content meets interactivity."_  
> **– Anonymous**

✨ Usage in Code

import { esArticles, enArticles, allArticles } from 'mdxlayer/generated';

console.log(esArticles);
console.log(enArticles);
console.log(allArticles);

🖥 CLI Commands

pnpm mdxlayer build
# Generate static JSON and index.d.ts

pnpm mdxlayer dev
# Watch mode — regenerate on file changes

pnpm mdxlayer build --config docs.config.js
# This will load settings from `docs.config.js`

mdxlayer build --config docs.config.js --out docs-content
# This will load `docs.config.js` and output to `docs-content/`

📁 Folder Structure

content/
├── what-makes-mdx-powerful.mdx

📁 Output Structure

.mdxlayer/
├── cache/
│   ├── compiled-config.js
│   ├── data.json
├── generated/
│   ├── Articles/
│   │   ├── what-makes-mdx-powerful.json
│   ├── types.d.ts
│   ├── index.d.ts
│   └── index.js
├── package.json

Plugins

next-mdxlayer

📦 Installation

pnpm add -D next-mdxlayer
# or
npm install -D next-mdxlayer
# or
yarn add -D next-mdxlayer

⚙️ Configuration

import { withMdxlayer } from 'next-mdxlayer';

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  pageExtensions: ['js', 'ts', 'jsx', 'tsx', 'mdx'],
  experimental: {
    serverActions: true,
  },
};

export default withMdxlayer(nextConfig);

 import { useMDXComponent } from 'next-mdxlayer/hook';
 import { allServices } from 'mdxlayer/generated';
 import MyAudioComponent from './audio'
 import MyIntroComponent from './intro'


 export default function MyPage() {
   const MDXComponent = useMDXComponent(allServices[0]._body.code);
   return (
     <MDXComponent
       components={{
         a: (props) => <a {...props} className="underline text-blue-600" />,
         img: (props) => <img {...props} style={{ maxWidth: '100%' }} />,
         Audio: MyAudioComponent,
         Introduction: MyIntroComponent,
       }}
     />
   );
 }

🔩 API

defineConfig(config)

Accepts the following shape:

interface Config {
  name: string;
  contentDir: string;
  frontmatterSchema: TyneType;
  resolvedFields?: Record<
    string,
    { resolve: (doc: Doc) => any | Promise<any> }
  >;
}

Doc

interface Doc {
  _filePath: string;
  _id: string;
  _body: { raw: string; code: string };
  // + fields from your frontmatterSchema
}

📝 License

This project is licensed under the MIT License – see the LICENSE file for details.

Author: Estarlin R (estarlincito.com)