astro/packages/integrations/mdx/README.md

@astrojs/mdx 📝

This Astro integration enables the usage of MDX components and allows you to create pages as .mdx files.

• Why MDX?
• Installation
• Usage
• Configuration
• Examples
• Troubleshooting
• Contributing
• Changelog

Why MDX?

MDX is the defacto solution for embedding components, such as interactive charts or alerts, within Markdown content. If you have existing content authored in MDX, this integration makes migrating to Astro a breeze.

Want to learn more about MDX before using this integration?
Check out “What is MDX?”, a deep-dive on the MDX format.

Installation

Quick Install

The astro add command-line tool automates the installation for you. Run one of the following commands in a new terminal window. (If you aren't sure which package manager you're using, run the first command.) Then, follow the prompts, and type "y" in the terminal (meaning "yes") for each one.

# Using NPM
npx astro add mdx
# Using Yarn
yarn astro add mdx
# Using PNPM
pnpx astro add mdx

Then, restart the dev server by typing CTRL-C and then npm run astro dev in the terminal window that was running Astro.

Because this command is new, it might not properly set things up. If that happens, feel free to log an issue on our GitHub and try the manual installation steps below.

Manual Install

First, install the @astrojs/mdx package using your package manager. If you're using npm or aren't sure, run this in the terminal:

npm install @astrojs/mdx

Then, apply this integration to your astro.config.* file using the integrations property:

astro.config.mjs

import { defineConfig } from 'astro/config';
import mdx from '@astrojs/mdx';

export default defineConfig({
  // ...
  integrations: [mdx()],
});

Finally, restart the dev server.

Usage

To write your first MDX page in Astro, head to our UI framework documentation. You'll explore:

• 📦 how framework components are loaded,
• 💧 client-side hydration options, and
• 🪆 opportunities to mix and nest frameworks together

Client Directives are still required in .mdx files.

Note

: .mdx files adhere to strict JSX syntax rather than Astro's HTML-like syntax.

Also check our Astro Integration Documentation for more on integrations.

Configuration

remarkPlugins

Default plugins: remark-gfm, remark-smartypants

Remark plugins allow you to extend your Markdown with new capabilities. This includes auto-generating a table of contents, applying accessible emoji labels, and more. We encourage you to browse awesome-remark for a full curated list!

We apply GitHub-flavored Markdown and Smartypants by default. This brings some niceties like auto-generating clickable links from text (ex. https://example.com) and formatting quotes for readability. When applying your own plugins, you can choose to preserve or remove these defaults.

To apply plugins while preserving Astro's default plugins, use a nested extends object like so:

// astro.config.mjs
import remarkToc from 'remark-toc';

export default {
  integrations: [mdx({
    // apply remark-toc alongside GitHub-flavored markdown and Smartypants
    remarkPlugins: { extends: [remarkToc] },
  })],
}

To apply plugins without Astro's defaults, you can apply a plain array:

// astro.config.mjs
import remarkToc from 'remark-toc';

export default {
  integrations: [mdx({
    // apply remark-toc alone, removing other defaults
    remarkPlugins: [remarkToc],
  })],
}

rehypePlugins

Default plugins: none

Rehype plugins allow you to transform the HTML that your Markdown generates. We recommend checking the Remark plugin catalog first before considering rehype plugins, since most users want to transform their Markdown syntax instead. If HTML transforms are what you need, we encourage you to browse awesome-rehype for a full curated list of plugins!

To apply rehype plugins, use the rehypePlugins configuration option like so:

// astro.config.mjs
import rehypeMinifyHtml from 'rehype-minify';

export default {
  integrations: [mdx({
    rehypePlugins: [rehypeMinifyHtml],
  })],
}

Examples

• The Astro MDX example shows how to use MDX files in your Astro project.

Troubleshooting

For help, check out the #support-threads channel on Discord. Our friendly Support Squad members are here to help!

You can also check our Astro Integration Documentation for more on integrations.

Contributing

This package is maintained by Astro's Core team. You're welcome to submit an issue or PR!

Changelog

See CHANGELOG.md for a history of changes to this integration.