- [#7104](https://github.com/withastro/astro/pull/7104) [`826e02890`](https://github.com/withastro/astro/commit/826e0289005f645b902375b98d5549c6a95ccafa) Thanks [@bluwy](https://github.com/bluwy)! - Specify `"files"` field to only publish necessary files
- [#6932](https://github.com/withastro/astro/pull/6932) [`49514e4ce`](https://github.com/withastro/astro/commit/49514e4ce40fedb39bf7decd2c296258efbdafc7) Thanks [@bluwy](https://github.com/bluwy)! - Upgrade shiki to v0.14.1. This updates the shiki theme colors and adds the theme name to the `pre` tag, e.g. `<pre class="astro-code github-dark">`.
- [#6824](https://github.com/withastro/astro/pull/6824) [`2511d58d5`](https://github.com/withastro/astro/commit/2511d58d586af080a78e5ef8a63020b3e17770db) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Add support for using optimized and relative images in MDX files with `experimental.assets`
- [#6604](https://github.com/withastro/astro/pull/6604) [`7f7a8504b`](https://github.com/withastro/astro/commit/7f7a8504b5c2df4c99d3025931860c0d50992510) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fix using optimized images in Markdown not working
- [#6555](https://github.com/withastro/astro/pull/6555) [`f5fddafc2`](https://github.com/withastro/astro/commit/f5fddafc248bb1ef57b7349bfecc25539ae2b5ea) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Add a `validateOptions` hook to the Image Service API in order to set default options and validate the passed options
- [#6344](https://github.com/withastro/astro/pull/6344) [`694918a56`](https://github.com/withastro/astro/commit/694918a56b01104831296be0c25456135a63c784) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Add a new experimental flag (`experimental.assets`) to enable our new core Assets story.
This unlocks a few features:
- A new built-in image component and JavaScript API to transform and optimize images.
- Relative images with automatic optimization in Markdown.
- Support for validating assets using content collections.
- and more!
See [Assets (Experimental)](https://docs.astro.build/en/guides/assets/) on our docs site for more information on how to use this feature!
- [#6213](https://github.com/withastro/astro/pull/6213) [`afbbc4d5b`](https://github.com/withastro/astro/commit/afbbc4d5bfafc1779bac00b41c2a1cb1c90f2808) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Updated compilation settings to disable downlevelling for Node 14
- [#5687](https://github.com/withastro/astro/pull/5687) [`e2019be6f`](https://github.com/withastro/astro/commit/e2019be6ffa46fa33d92cfd346f9ecbe51bb7144) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Give remark and rehype plugins access to user frontmatter via frontmatter injection. This means `data.astro.frontmatter` is now the _complete_ Markdown or MDX document's frontmatter, rather than an empty object.
This allows plugin authors to modify existing frontmatter, or compute new properties based on other properties. For example, say you want to compute a full image URL based on an `imageSrc` slug in your document frontmatter:
```ts
export function remarkInjectSocialImagePlugin() {
return function (tree, file) {
const { frontmatter } = file.data.astro;
frontmatter.socialImageSrc = new URL(frontmatter.imageSrc, 'https://my-blog.com/').pathname;
};
}
```
When using Content Collections, you can access this modified frontmatter using the `remarkPluginFrontmatter` property returned when rendering an entry.
**Migration instructions**
Plugin authors should now **check for user frontmatter when applying defaults.**
For example, say a remark plugin wants to apply a default `title` if none is present. Add a conditional to check if the property is present, and update if none exists:
```diff
export function remarkInjectTitlePlugin() {
return function (tree, file) {
const { frontmatter } = file.data.astro;
+ if (!frontmatter.title) {
frontmatter.title = 'Default title';
+ }
}
}
```
This differs from previous behavior, where a Markdown file's frontmatter would _always_ override frontmatter injected via remark or reype.
- [#5785](https://github.com/withastro/astro/pull/5785) [`16107b6a1`](https://github.com/withastro/astro/commit/16107b6a10514ef1b563e585ec9add4b14f42b94) Thanks [@delucis](https://github.com/delucis)! - Drop support for legacy Astro-flavored Markdown
- [#5684](https://github.com/withastro/astro/pull/5684) [`a9c292026`](https://github.com/withastro/astro/commit/a9c2920264e36cc5dc05f4adc1912187979edb0d) & [#5769](https://github.com/withastro/astro/pull/5769) [`93e633922`](https://github.com/withastro/astro/commit/93e633922c2e449df3bb2357b3683af1d3c0e07b) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Refine Markdown and MDX configuration options for ease-of-use.
- **Replace the `extendDefaultPlugins` option** with a `gfm` boolean and a `smartypants` boolean. These are enabled by default, and can be disabled to remove GitHub-Flavored Markdown and SmartyPants.
- Ensure GitHub-Flavored Markdown and SmartyPants are applied whether or not custom `remarkPlugins` or `rehypePlugins` are configured. If you want to apply custom plugins _and_ remove Astro's default plugins, manually set `gfm: false` and `smartypants: false` in your config.
You may have disabled Astro's built-in plugins (GitHub-Flavored Markdown and Smartypants) with the `extendDefaultPlugins` option. This has now been split into 2 flags to disable each plugin individually:
Additionally, applying remark and rehype plugins **no longer disables**`gfm` and `smartypants`. You will need to opt-out manually by setting `gfm` and `smartypants` to `false`.
- Support _all_ Markdown configuration options (except `drafts`) from your MDX integration config. This includes `syntaxHighlighting` and `shikiConfig` options to further customize the MDX renderer.
- Simplify `extendPlugins` to an `extendMarkdownConfig` option. MDX options will default to their equivalent in your Markdown config. By setting `extendMarkdownConfig` to false, you can "eject" to set your own syntax highlighting, plugins, and more.
-`extendMarkdownConfig` (`true` by default) to toggle Markdown config inheritance. This replaces the `extendPlugins: 'markdown'` option.
-`gfm` (`true` by default) and `smartypants` (`true` by default) to toggle GitHub-Flavored Markdown and SmartyPants in MDX. This replaces the `extendPlugins: 'defaults'` option.
- [#5825](https://github.com/withastro/astro/pull/5825) [`52209ca2a`](https://github.com/withastro/astro/commit/52209ca2ad72a30854947dcb3a90ab4db0ac0a6f) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Baseline the experimental `contentCollections` flag. You're free to remove this from your astro config!
```diff
import { defineConfig } from 'astro/config';
export default defineConfig({
- experimental: { contentCollections: true }
})
```
- [#5806](https://github.com/withastro/astro/pull/5806) [`7572f7402`](https://github.com/withastro/astro/commit/7572f7402238da37de748be58d678fedaf863b53) Thanks [@matthewp](https://github.com/matthewp)! - Make astro a `peerDependency` of integrations
This marks `astro` as a `peerDependency` of several packages that are already getting `major` version bumps. This is so we can more properly track the dependency between them and what version of Astro they are being used with.
- [#5785](https://github.com/withastro/astro/pull/5785) [`16107b6a1`](https://github.com/withastro/astro/commit/16107b6a10514ef1b563e585ec9add4b14f42b94) Thanks [@delucis](https://github.com/delucis)! - Drop support for legacy Astro-flavored Markdown
- [#5825](https://github.com/withastro/astro/pull/5825) [`52209ca2a`](https://github.com/withastro/astro/commit/52209ca2ad72a30854947dcb3a90ab4db0ac0a6f) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Baseline the experimental `contentCollections` flag. You're free to remove this from your astro config!
```diff
import { defineConfig } from 'astro/config';
export default defineConfig({
- experimental: { contentCollections: true }
})
```
- [#5806](https://github.com/withastro/astro/pull/5806) [`7572f7402`](https://github.com/withastro/astro/commit/7572f7402238da37de748be58d678fedaf863b53) Thanks [@matthewp](https://github.com/matthewp)! - Make astro a peerDependency of integrations
This marks `astro` as a peerDependency of several packages that are already getting `major` version bumps. This is so we can more properly track the dependency between them and what version of Astro they are being used with.
- [#5769](https://github.com/withastro/astro/pull/5769) [`93e633922`](https://github.com/withastro/astro/commit/93e633922c2e449df3bb2357b3683af1d3c0e07b) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Introduce a `smartypants` flag to opt-out of Astro's default SmartyPants plugin.
```js
{
markdown: {
smartypants: false,
}
}
```
#### Migration
You may have disabled Astro's built-in plugins (GitHub-Flavored Markdown and Smartypants) with the `extendDefaultPlugins` option. This has now been split into 2 flags to disable each plugin individually:
-`markdown.gfm` to disable GitHub-Flavored Markdown
- [#5687](https://github.com/withastro/astro/pull/5687) [`e2019be6f`](https://github.com/withastro/astro/commit/e2019be6ffa46fa33d92cfd346f9ecbe51bb7144) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Give remark and rehype plugins access to user frontmatter via frontmatter injection. This means `data.astro.frontmatter` is now the _complete_ Markdown or MDX document's frontmatter, rather than an empty object.
This allows plugin authors to modify existing frontmatter, or compute new properties based on other properties. For example, say you want to compute a full image URL based on an `imageSrc` slug in your document frontmatter:
```ts
export function remarkInjectSocialImagePlugin() {
return function (tree, file) {
const { frontmatter } = file.data.astro;
frontmatter.socialImageSrc = new URL(frontmatter.imageSrc, 'https://my-blog.com/').pathname;
};
}
```
#### Content Collections - new `remarkPluginFrontmatter` property
We have changed _inject_ frontmatter to _modify_ frontmatter in our docs to improve discoverability. This is based on support forum feedback, where "injection" is rarely the term used.
To reflect this, the `injectedFrontmatter` property has been renamed to `remarkPluginFrontmatter`. This should clarify this plugin is still separate from the `data` export Content Collections expose today.
#### Migration instructions
Plugin authors should now **check for user frontmatter when applying defaults.**
For example, say a remark plugin wants to apply a default `title` if none is present. Add a conditional to check if the property is present, and update if none exists:
```diff
export function remarkInjectTitlePlugin() {
return function (tree, file) {
const { frontmatter } = file.data.astro;
+ if (!frontmatter.title) {
frontmatter.title = 'Default title';
+ }
}
}
```
This differs from previous behavior, where a Markdown file's frontmatter would _always_ override frontmatter injected via remark or reype.
- [#5684](https://github.com/withastro/astro/pull/5684) [`a9c292026`](https://github.com/withastro/astro/commit/a9c2920264e36cc5dc05f4adc1912187979edb0d) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Refine Markdown and MDX configuration options for ease-of-use.
#### Markdown
- **Remove `remark-smartypants`** from Astro's default Markdown plugins.
- **Replace the `extendDefaultPlugins` option** with a simplified `gfm` boolean. This is enabled by default, and can be disabled to remove GitHub-Flavored Markdown.
- Ensure GitHub-Flavored Markdown is applied whether or not custom `remarkPlugins` or `rehypePlugins` are configured. If you want to apply custom plugins _and_ remove GFM, manually set `gfm: false` in your config.
#### MDX
- Support _all_ Markdown configuration options (except `drafts`) from your MDX integration config. This includes `syntaxHighlighting` and `shikiConfig` options to further customize the MDX renderer.
- Simplify `extendDefaults` to an `extendMarkdownConfig` option. MDX options will default to their equivalent in your Markdown config. By setting `extendMarkdownConfig` to false, you can "eject" to set your own syntax highlighting, plugins, and more.
#### Migration
To preserve your existing Markdown and MDX setup, you may need some configuration changes:
##### Smartypants manual installation
[Smartypants](https://github.com/silvenon/remark-smartypants) has been removed from Astro's default setup. If you rely on this plugin, [install `remark-smartypants`](https://github.com/silvenon/remark-smartypants#installing) and apply to your `astro.config.*`:
```diff
// astro.config.mjs
import { defineConfig } from 'astro/config';
+ import smartypants from 'remark-smartypants';
export default defineConfig({
markdown: {
+ remarkPlugins: [smartypants],
}
});
```
##### Migrate `extendDefaultPlugins` to `gfm`
You may have disabled Astro's built-in plugins (GitHub-Flavored Markdown and Smartypants) with the `extendDefaultPlugins` option. Since Smartypants has been removed, this has been renamed to `gfm`.
```diff
// astro.config.mjs
import { defineConfig } from 'astro/config';
export default defineConfig({
markdown: {
- extendDefaultPlugins: false,
+ gfm: false,
}
});
```
Additionally, applying remark and rehype plugins **no longer disables**`gfm`. You will need to opt-out manually by setting `gfm` to `false`.
##### Migrate MDX's `extendPlugins` to `extendMarkdownConfig`
You may have used the `extendPlugins` option to manage plugin defaults in MDX. This has been replaced by 2 flags:
-`extendMarkdownConfig` (`true` by default) to toggle Markdown config inheritance. This replaces the `extendPlugins: 'markdown'` option.
-`gfm` (`true` by default) to toggle GitHub-Flavored Markdown in MDX. This replaces the `extendPlugins: 'defaults'` option.
The `rehypeHeadingIds` plugin injects IDs for all headings in a Markdown document and can now also handle MDX inputs if needed. You can import and use this plugin if you need heading IDs to be injected _before_ other rehype plugins run.
- [#4474](https://github.com/withastro/astro/pull/4474) [`ac0321824`](https://github.com/withastro/astro/commit/ac03218247763e4782824e220a384fd20ae6d769) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Add "extends" to markdown plugin config to preserve Astro defaults
* [#4138](https://github.com/withastro/astro/pull/4138) [`839097c84`](https://github.com/withastro/astro/commit/839097c84e830542c17c18d8337a88de8885c356) Thanks [@gtnbssn](https://github.com/gtnbssn)! - Makes remark-rehype options available in astro.config.mjs
- [#4474](https://github.com/withastro/astro/pull/4474) [`ac0321824`](https://github.com/withastro/astro/commit/ac03218247763e4782824e220a384fd20ae6d769) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Add "extends" to markdown plugin config to preserve Astro defaults
* [#4138](https://github.com/withastro/astro/pull/4138) [`839097c84`](https://github.com/withastro/astro/commit/839097c84e830542c17c18d8337a88de8885c356) Thanks [@gtnbssn](https://github.com/gtnbssn)! - Makes remark-rehype options available in astro.config.mjs
- [#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.
