- [#4176](https://github.com/withastro/astro/pull/4176) [`2675b8633`](https://github.com/withastro/astro/commit/2675b8633c5d5c45b237ec87940d5eaf1bfb1b4b) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Support frontmatter injection for MD and MDX using remark and rehype plugins
* [#4137](https://github.com/withastro/astro/pull/4137) [`471c6f784`](https://github.com/withastro/astro/commit/471c6f784e21399676c8b2002665ffdf83a1c59e) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Speed up internal markdown builds with new vite-plugin markdown
- [#4169](https://github.com/withastro/astro/pull/4169) [`16034f0dd`](https://github.com/withastro/astro/commit/16034f0dd5b3683e9e022dbd413e85bd18d2b031) Thanks [@hippotastic](https://github.com/hippotastic)! - Fix double-escaping of non-highlighted code blocks in Astro-flavored markdown
- [#4114](https://github.com/withastro/astro/pull/4114) [`64432bcb8`](https://github.com/withastro/astro/commit/64432bcb873efd0e4297c00fc9583a1fe516dfe7) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Refactor `@astrojs/mdx` and `@astrojs/markdown-remark` to use `@astrojs/prism` instead of duplicating the code
- [`ba11b3399`](https://github.com/withastro/astro/commit/ba11b33996d79c32da947986edb0f32dbcc04aaf) Thanks [@RafidMuhymin](https://github.com/RafidMuhymin)! - fixed generated slugs in markdown that ends with a dash
* [#4016](https://github.com/withastro/astro/pull/4016) [`00fab4ce1`](https://github.com/withastro/astro/commit/00fab4ce135eb799cac69140403d7724686733d6) Thanks [@bholmesdev](https://github.com/bholmesdev)! - The use of components and JSX expressions in Markdown are no longer supported by default.
For long term support, migrate to the `@astrojs/mdx` integration for MDX support (including `.mdx` pages!).
Not ready to migrate to MDX? Add the legacy flag to your Astro config to re-enable the previous Markdown support.
```js
// https://astro.build/config
export default defineConfig({
legacy: {
astroFlavoredMarkdown: true,
},
});
```
- [#4031](https://github.com/withastro/astro/pull/4031) [`6e27a5fdc`](https://github.com/withastro/astro/commit/6e27a5fdc21276cad26cd50e16a2709a40a7cbac) Thanks [@natemoo-re](https://github.com/natemoo-re)! - **BREAKING** Renamed Markdown utility function `getHeaders()` to `getHeadings()`.
### Patch Changes
- [#4008](https://github.com/withastro/astro/pull/4008) [`399d7e269`](https://github.com/withastro/astro/commit/399d7e269834d11c046b390705a9a53d3738f3cf) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Avoid parsing JSX, components, and Astro islands when using "plain" md mode. This brings `markdown.mode: 'md'` in-line with our docs description.
- [#3911](https://github.com/withastro/astro/pull/3911) [`ca45c0c27`](https://github.com/withastro/astro/commit/ca45c0c270f5ca3f7d2fb113a235d415cecdb333) Thanks [@JuanM04](https://github.com/JuanM04)! - Don't throw when Shiki doesn't recognize a language
- [#3669](https://github.com/withastro/astro/pull/3669) [`93e1020b1`](https://github.com/withastro/astro/commit/93e1020b1e8549b08cf5646e1ebc3ae34e14ebc8) Thanks [@natemoo-re](https://github.com/natemoo-re)! - Tooling: reintroduce smoke test across example projects
- [#3638](https://github.com/withastro/astro/pull/3638) [`80c71c7c`](https://github.com/withastro/astro/commit/80c71c7c56d15dc05ec0c5a848130aad222d7d51) Thanks [@tony-sull](https://github.com/tony-sull)! - Fix: HTML comments in markdown code blocks should not be wrapped in JS comments
* [#3612](https://github.com/withastro/astro/pull/3612) [`fca58cfd`](https://github.com/withastro/astro/commit/fca58cfd91b68501ec82350ab023170b208d8ce7) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Fix: "vpath" import error when building for netlify edge
- [#3410](https://github.com/withastro/astro/pull/3410) [`cfae9760`](https://github.com/withastro/astro/commit/cfae9760b252052b6189e96398b819a4337634a8) Thanks [@natemoo-re](https://github.com/natemoo-re)! - Significantally more stable behavior for "Markdown + Components" usage, which now handles component serialization much more similarly to MDX. Also supports switching between Components and Markdown without extra newlines, removes wrapping `<p>` tags from standalone components, and improves JSX expression handling.
- [#3234](https://github.com/withastro/astro/pull/3234) [`de123b28`](https://github.com/withastro/astro/commit/de123b28b3ff398b800cb598f20326ca85a0fb60) Thanks [@JuanM04](https://github.com/JuanM04)! - Removed `rehype-slug` in favor of our own implementation. The behavior of the slugging should remain the same
* [#3234](https://github.com/withastro/astro/pull/3234) [`de123b28`](https://github.com/withastro/astro/commit/de123b28b3ff398b800cb598f20326ca85a0fb60) Thanks [@JuanM04](https://github.com/JuanM04)! - Moved some type from `astro` to `@astrojs/markdown-remark`
- [`53162534`](https://github.com/withastro/astro/commit/53162534450e160f65b95e7ef1523a106347ca28) Thanks [@FredKSchott](https://github.com/FredKSchott)! - - Removed `renderMarkdownWithFrontmatter` because it wasn't being used
- All options of `renderMarkdown` are now required — see the exported interface `AstroMarkdownOptions`
- New types: RemarkPlugin, RehypePlugin and ShikiConfig
- [#2824](https://github.com/withastro/astro/pull/2824) [`0a3d3e51`](https://github.com/withastro/astro/commit/0a3d3e51a66af80fa949ba0f5e2104439d2be634) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Change shiki to our default markdown syntax highlighter. This includes updates to all relevant starter projects that used Prism-specific styles.
### Patch Changes
- [#2870](https://github.com/withastro/astro/pull/2870) [`d763ec18`](https://github.com/withastro/astro/commit/d763ec183ea391ad79ca16bf2b2e76848fc1180c) Thanks [@FredKSchott](https://github.com/FredKSchott)! - Fix a shiki performance issue affecting large sites
- [#2824](https://github.com/withastro/astro/pull/2824) [`0a3d3e51`](https://github.com/withastro/astro/commit/0a3d3e51a66af80fa949ba0f5e2104439d2be634) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Change shiki to our default markdown syntax highlighter. This includes updates to all relevant starter projects that used Prism-specific styles.
- [#2628](https://github.com/withastro/astro/pull/2628) [`9b7e2ab2`](https://github.com/withastro/astro/commit/9b7e2ab2516cd36520364490df8e3482008292e3) Thanks [@JuanM04](https://github.com/JuanM04)! - Fixed shiki to work with `{ "type": "module" }`
- [#2534](https://github.com/withastro/astro/pull/2534) [`cfeaa941`](https://github.com/withastro/astro/commit/cfeaa9414acdecec6f5d66ee0e33fe4fde574eee) Thanks [@JuanM04](https://github.com/JuanM04)! - Now you can use local plugins by passing a function instead of an `import`
* [#2518](https://github.com/withastro/astro/pull/2518) [`2bc91543`](https://github.com/withastro/astro/commit/2bc91543ceeb5f3dd45e201bf75d79f186e85141) Thanks [@JuanM04](https://github.com/JuanM04)! - Added the ability to use custom themes and langs with Shiki (`<Code/>` and `@astrojs/markdown-remark`)
- [#2497](https://github.com/withastro/astro/pull/2497) [`6fe1b027`](https://github.com/withastro/astro/commit/6fe1b0279fce5a7a0e90ff79746ea0b641da3e21) Thanks [@JuanM04](https://github.com/JuanM04)! - Add Shiki as an alternative to Prism
- [#2534](https://github.com/withastro/astro/pull/2534) [`cfeaa941`](https://github.com/withastro/astro/commit/cfeaa9414acdecec6f5d66ee0e33fe4fde574eee) Thanks [@JuanM04](https://github.com/JuanM04)! - Now you can use local plugins by passing a function instead of an `import`
* [#2518](https://github.com/withastro/astro/pull/2518) [`2bc91543`](https://github.com/withastro/astro/commit/2bc91543ceeb5f3dd45e201bf75d79f186e85141) Thanks [@JuanM04](https://github.com/JuanM04)! - Added the ability to use custom themes and langs with Shiki (`<Code/>` and `@astrojs/markdown-remark`)
- [#2497](https://github.com/withastro/astro/pull/2497) [`6fe1b027`](https://github.com/withastro/astro/commit/6fe1b0279fce5a7a0e90ff79746ea0b641da3e21) Thanks [@JuanM04](https://github.com/JuanM04)! - Add Shiki as an alternative to Prism
- [#2202](https://github.com/withastro/astro/pull/2202) [`45cea6ae`](https://github.com/withastro/astro/commit/45cea6aec5a310fed4cb8da0d96670d6b99a2539) Thanks [@jonathantneal](https://github.com/jonathantneal)! - Officially drop support for Node v12. The minimum supported version is now Node v14.15+,
- d396943: Add support for [`remark`](https://github.com/remarkjs/remark#readme) and [`rehype`](https://github.com/rehypejs/rehype#readme) plugins for both `.md` pages and `.astro` pages using the [`<Markdown>`](/docs/guides/markdown-content.md) component.
For example, the `astro.config.mjs` could be updated to include the following. [Read the Markdown documentation](/docs/guides/markdown-content.md) for more information.
> **Note** Enabling custom `remarkPlugins` or `rehypePlugins` removes Astro's built-in support for [GitHub-flavored Markdown](https://github.github.com/gfm/) support, [Footnotes](https://github.com/remarkjs/remark-footnotes) syntax, [Smartypants](https://github.com/silvenon/remark-smartypants). You must explicitly add these plugins to your `astro.config.mjs` file, if desired.
