Update dependency @astrojs/mdx to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@astrojs/mdx (source)	^3.1.7 -> ^4.0.0

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Release Notes

withastro/astro (@​astrojs/mdx)

v4.2.1

Patch Changes

• #​13448 91c9503 Thanks @​ematipico! - Upgrade to shiki v3

• Updated dependencies [91c9503]:

  • @​astrojs/markdown-remark@​6.3.1

v4.2.0

Compare Source

Minor Changes

• #​13352 cb886dc Thanks @​delucis! - Adds support for a new experimental.headingIdCompat flag

  By default, Astro removes a trailing - from the end of IDs it generates for headings ending with
  special characters. This differs from the behavior of common Markdown processors.

  You can now disable this behavior with a new configuration flag:

  // astro.config.mjs
  import { defineConfig } from 'astro/config';
  
  export default defineConfig({
    experimental: {
      headingIdCompat: true,
    },
  });

  This can be useful when heading IDs and anchor links need to behave consistently across your site
  and other platforms such as GitHub and npm.

  If you are using the rehypeHeadingIds plugin directly, you can also pass this new option:

  // astro.config.mjs
  import { defineConfig } from 'astro/config';
  import { rehypeHeadingIds } from '@​astrojs/markdown-remark';
  import { otherPluginThatReliesOnHeadingIDs } from 'some/plugin/source';
  
  export default defineConfig({
    markdown: {
      rehypePlugins: [
        [rehypeHeadingIds, { experimentalHeadingIdCompat: true }],
        otherPluginThatReliesOnHeadingIDs,
      ],
    },
  });

Patch Changes

• Updated dependencies [cb886dc, a3327ff]:
  • @​astrojs/markdown-remark@​6.3.0

v4.1.1

Compare Source

Patch Changes

• Updated dependencies []:
  • @​astrojs/markdown-remark@​6.2.1

v4.1.0

Compare Source

Minor Changes

• #​13254 1e11f5e Thanks @​p0lyw0lf! - Adds the ability to process and optimize remote images in Markdown syntax in MDX files.

  Previously, Astro only allowed local images to be optimized when included using ![]() syntax. Astro's image service could only display remote images without any processing.

  Now, Astro's image service can also optimize remote images written in standard Markdown syntax. This allows you to enjoy the benefits of Astro's image processing when your images are stored externally, for example in a CMS or digital asset manager.

  No additional configuration is required to use this feature! Any existing remote images written in Markdown will now automatically be optimized. To opt-out of this processing, write your images in Markdown using the JSX <img/> tag instead. Note that images located in your public/ folder are still never processed.

Patch Changes

• Updated dependencies [1e11f5e]:
  • @​astrojs/markdown-remark@​6.2.0

v4.0.8

Compare Source

Patch Changes

• Updated dependencies [db252e0]:
  • @​astrojs/markdown-remark@​6.1.0

v4.0.7

Compare Source

Patch Changes

• #​13011 cf30880 Thanks @​ascorbic! - Upgrades Vite

v4.0.6

Compare Source

Patch Changes

• Updated dependencies [3d89e62]:
  • @​astrojs/markdown-remark@​6.0.2

v4.0.5

Compare Source

Patch Changes

• #​12959 3a267f3 Thanks @​bluwy! - Reverts withastro/astro@9a3b48c which caused a regression for rendering inline MDX components and MDX files from content collections

v4.0.4

Compare Source

Patch Changes

• #​12921 aeb7e1a Thanks @​ascorbic! - Fixes a bug that caused Image component to be imported on MDX pages that did not include images

• #​12913 9a3b48c Thanks @​bluwy! - Makes internal check() function a no-op to allow faster component renders and prevent React 19 component warnings

v4.0.3

Compare Source

Patch Changes

• #​12799 739dbfb Thanks @​ascorbic! - Upgrades Vite to pin esbuild

v4.0.2

Compare Source

Patch Changes

• Updated dependencies [f13417b, 87231b1, a71e9b9]:
  • @​astrojs/markdown-remark@​6.0.1

v4.0.1

Compare Source

Patch Changes

• #​12594 4f2fd0a Thanks @​Princesseuh! - Fixes compatibility with Astro 5

v4.0.0

Compare Source

Major Changes

• #​12231 90ae100 Thanks @​bluwy! - Handles the breaking change in Astro where content pages (including .mdx pages located within src/pages/) no longer respond with charset=utf-8 in the Content-Type header.

  For MDX pages without layouts, @astrojs/mdx will automatically add the <meta charset="utf-8"> tag to the page by default. This reduces the boilerplate needed to write with non-ASCII characters. If your MDX pages have a layout, the layout component should include the <meta charset="utf-8"> tag.

  If you require charset=utf-8 to render your page correctly, make sure that your layout components have the <meta charset="utf-8"> tag added.

• #​12008 5608338 Thanks @​Princesseuh! - Welcome to the Astro 5 beta! This release has no changes from the latest alpha of this package, but it does bring us one step closer to the final, stable release.

  Starting from this release, no breaking changes will be introduced unless absolutely necessary.

  To learn how to upgrade, check out the Astro v5.0 upgrade guide in our beta docs site.

Minor Changes

• #​12539 827093e Thanks @​bluwy! - Drops node 21 support

• #​11741 6617491 Thanks @​bluwy! - Updates adapter server entrypoint to use @astrojs/mdx/server.js

  This is an internal change. Handling JSX in your .mdx files has been moved from Astro internals and is now the responsibility of this integration. You should not notice a change in your project, and no update to your code is required.

Patch Changes

• #​12075 a19530e Thanks @​bluwy! - Parses frontmatter ourselves

• #​11861 3ab3b4e Thanks @​bluwy! - Updates @astrojs/markdown-remark and handle its breaking changes

• #​12533 1b61fdf Thanks @​ematipico! - Fixes a case where the MDX renderer couldn't be loaded when used as a direct dependency of an Astro integration.

• Updated dependencies [3ab3b4e, 5608338, 560ef15, 83a2a64, 3ab3b4e, a19530e]:

  • @​astrojs/markdown-remark@​6.0.0

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