Enhance Markdown with callouts, Expressive Code blocks, image caption directives, video embeds, styled links, badges, and details.
This guide has made slight changes based on the markdown-mdx-extended-features.
Calloutsh2
Supported by the rehype-callouts , you can configure the plugin in plugins/index.ts.
If you change the theme configuration (default: 'vitepress'), you will also need to update the imported CSS file in src/styles/pro.css (@import 'rehype-callouts/theme/yourconfig').
<!-- Callout type names are case-insensitive: 'Note', 'NOTE', and 'note' are equivalent. -->
<!-- vitepress -->
<!-- This is a _non-collapsible_ callout -->
> [!note]> Note content.
> [!tip]> Tip content.
> [!important]> Important content.
> [!warning]> Warning content.
> [!caution]> Caution content.
> [!caution]- This is a **collapsible** callout> Caution content.
> [!note]+ This is a **collapsible** callout> Note content.Note content.
Tip content.
Important content.
Warning content.
Caution content.
This is a collapsible callout
Caution content.
This is a collapsible callout
Note content.
Fully-featured Code Blocksh2
Supported by astro-expressive-code with @expressive-code/plugin-collapsible-sections and @expressive-code/plugin-line-numbers plugins to add styling and extra functionality for code blocks.
To customize code block themes or functionality, modify the ec.config.mjs file at the project root after reviewing the Configuring Expressive Code, such as change themes, enable word wrap, or toggle line numbers.
Here’s a quick preview of what’s possible. Check the detailed guide for more info.
Syntax highlightingh4
console.log('This code is syntax highlighted!')ANSI colors:- Regular: Red Green Yellow Blue Magenta Cyan- Bold: Red Green Yellow Blue Magenta Cyan- Dimmed: Red Green Yellow Blue Magenta Cyan
256 colors (showing colors 160-177):160 161 162 163 164 165166 167 168 169 170 171172 173 174 175 176 177
Full RGB colors:ForestGreen - RGB(34, 139, 34)
Text formatting: Bold Dimmed Italic UnderlineCode editor framesh5
// Use `title="my-test-file.js"`console.log('Title attribute example')// Use `// src/content/index.ts`console.log('File name comment example')Terminal framesh5
echo "This terminal frame has no title"Write-Output "This one has a title!"Marking full lines & line rangesh5
// Line 1 - targeted by line number// Line 2// Line 3// Line 4 - targeted by line number// Line 5// Line 6// Line 7 - targeted by range "7-8"// Line 8 - targeted by range "7-8"Selecting line marker types (mark, ins, del)h5
function demo() { console.log('this line is marked as deleted') // This line and the next one are marked as inserted console.log('this is the second inserted line')
return 'this line uses the neutral default marker type'}Adding labels to line markersh5
<button role="button" {...props} value={value} className={buttonClassName} disabled={disabled} active={active}> {children && !active && (typeof children === 'string' ? <span>{children}</span> : children)}</button>Adding long labels on their own linesh5
<button role="button" {...props} value={value} className={buttonClassName} disabled={disabled} active={active}> {children && !active && (typeof children === 'string' ? <span>{children}</span> : children)}</button>Using diff-like syntaxh5
this line will be marked as insertedthis line will be marked as deletedthis is a regular linefunction thisIsJavaScript() { // This entire block gets highlighted as JavaScript, // and we can still add diff markers to it! console.log('Old code to be removed') console.log('New and shiny code!')}Marking individual text inside linesh5
// Plaintext search stringsfunction demo() { // Mark any given text inside lines return 'Multiple matches of the given text are supported'}Marking individual text inside linesh5
// Regular expressionsconsole.log('The words yes and yep will be marked.')# Regular expressionsecho "Test" > /home/test.txt// Regular expressionsIf you only want to mark certain parts matched by your regular expression, you can use capture groups.
For example, the expression `/ye(s|p)/` will match yes and yep, but only mark the character s or p:// Regular expressionsTo prevent this special treatment of capture groups, you can convert them to non-capturing groups by adding ?: after the opening parenthesis. For example:
This block uses `/ye(?:s|p)/`, which causes the fullmatching words "yes" and "yep" to be marked.// Selecting inline marker types (mark, ins, del)function demo() { console.log('These are inserted and deleted marker types') // The return statement uses the default marker type return true}Configuring word wrap per blockh5
// Example with wrapfunction getLongString() { return 'This is a very long string that will most probably not fit into the available space unless the container is extremely wide'}// Example with wrap=falsefunction getLongString() { return 'This is a very long string that will most probably not fit into the available space unless the container is extremely wide'}Configuring indentation of wrapped linesh5
// Example with preserveIndent (enabled by default)function getLongString() { return 'This is a very long string that will most probably not fit into the available space unless the container is extremely wide'}// Example with preserveIndent=falsefunction getLongString() { return 'This is a very long string that will most probably not fit into the available space unless the container is extremely wide'}Collapsible sectionsh5
5 collapsed lines
// All this boilerplate setup code will be collapsedimport { someBoilerplateEngine } from '@example/some-boilerplate'import { evenMoreBoilerplate } from '@example/even-more-boilerplate'
const engine = someBoilerplateEngine(evenMoreBoilerplate())
// This part of the code will be visible by defaultengine.doSomething(1, 2, 3, calcFn)
function calcFn() { // You can have multiple collapsed sections3 collapsed lines
const a = 1 const b = 2 const c = a + b
// This will remain visible console.log(`Calculation result: ${a} + ${b} = ${c}`) return c}
4 collapsed lines
// All this code until the end of the block will be collapsed againengine.closeConnection()engine.freeMemory()engine.shutdown({ reason: 'End of example boilerplate code' })Displaying line numbers per blockh5
// This code block will show line numbersconsole.log('Greetings from line 2!')console.log('I am on line 3')// Line numbers are disabled for this blockconsole.log('Hello?')console.log('Sorry, do you know what line I am on?')// Changing the starting line numberconsole.log('Greetings from line 5!')console.log('I am on line 6')Image Caption & Linkh2
Use the :::image directive from remark-directive-sugar to wrap images in a container for captions, clickable links, and more. Customize via the image option in plugins/index.ts (remarkDirectiveSugar) and style under /* :::image */ in src/styles/pro.css.
image-figureh3
:::image-figure[caption]{<figcaption> attrs}: The square brackets define the <figcaption> text (defaults to the alt text from ![]() if omitted), while the curly braces are used for inline styles or supported attributes to the generated <figcaption> element.
(<img> attrs): Standard Markdown image with optional attributes in parentheses, enabled by remark-imgattr, for customizing the generated <img> element.
:::image-figure[caption]{<figcaption> attrs}: The square brackets define the <figcaption> text (defaults to the alt text from ![]() if omitted), while the curly braces are used for inline styles or supported attributes to the generated <figcaption> element.
(<img> attrs): Standard Markdown image with optional attributes in parentheses, enabled by remark-imgattr, for customizing the generated <img> element.
:::image-figure[This Is a **Figcaption** with _`<figure>` Attrs_]{style="text-align:center;color:orange"}:::
:::image-figure[This is a **figcaption** with _`<img>` attrs_.](style: width:600px;):::
<!-- 💡 Use `(class:no-zoom)` to disable zoom -->
:::image-figure[This is a **figcaption** with `class:no-zoom`.](class:no-zoom):::
<!-- 💡 If no `[caption]`, use `[alt]` as figcaption. -->
:::image-figure![If `[caption]` not set, the alt text from `![]()` will be used as the figcaption.](assets/cover.png):::
<!-- 💡 Images for light (img-light) and dark (img-dark) modes --><!-- ⚠️ At least one line must separate two image syntaxes (![]()), or won't work. -->
:::image-figure[This example shows different images for light (add `class:img-light`) and dark (add `class:img-dark`) modes.](class:img-light)
(class:img-dark):::
<!-- ❌ If no text is available for the figcaption, it won't work. -->
:::image-figure:::
<figure> Attrs
<img> attrs.
class:no-zoom.![If [caption] not set, the alt text from ![]() will be used as the figcaption.](/_astro/cover.BKthU1GI_Z1usp9B.webp)


class:img-light) and dark (add class:img-dark) modes.Setting an image’s width attribute directly may cause blurriness. Learn more
image-ah3
The custom directive wraps an image inside a link, making it clickable.
:::image-a{<a> attrs}: Define the link (href), styles, or classes in the curly braces for <a> element.
(<img> attrs): Same as above.
:::image-a{href="https://github.com/Dnzzk2/Litos"}:::
:::image-a{href="https://github.com/Dnzzk2/Litos" style="display:block" .custom-class}(style: margin-bottom: -1rem; transform:scaleX(1.1) scaleY(1.1);, loading: eager):::
::::image-a{href="https://github.com/Dnzzk2/Litos"}:::image-figure[This example shows `:::image-a` wraps around `:::image-figure` (both are interchangeable).]:::::::
<!-- ❌ No external links provided, it won't work.-->
:::image-a:::

:::image-a wraps around :::image-figure (both are interchangeable).image-figure-polaroidh3
Polaroid style images with a border and shadow.
In order to ensure the style size on the phone, I have set a minimum width of 300px, and you can modify and expand the style in src/styles/picture.css.
:::::image-div-polaroid:::image-figure-polaroid[This is a **figcaption** with _`<img>` attrs_.]::::::::
:::::image-div-polaroid:::image-figure-polaroid
cover.png::::::::
:::::image-div-polaroid:::image-figure-polaroid::::::::
<!-- change style -->
:::::image-div-polaroid:::image-figure-polaroid{style="width:500px;"}::::::::This is a figcaption with <img> attrs.


cover.png


Video Embeddingh2
Use the ::video directive from remark-directive-sugar for consistent video embedding across different platforms. Customize via the video option in plugins/index.ts and style under /* ::video */ in src/styles/pro.css.
Say example.md contains:
<!-- Embed a YouTube video -->
::video-youtube{#gxBkghlglTg}
<!-- Embed a Bilibili video with a custom `title` attr -->
::video-bilibili[custom title]{id=BV1MC4y1c7Kv}
<!-- Embed a Vimeo video with class `no-scale` to disable scaling -->
::video-vimeo{id=912831806 class='no-scale'}
<!-- ::video-vimeo{id=912831806 .no-scale} -->
<!-- Embed a custom video URL (must use `id`, not `#`) -->
::video{id=https://www.youtube-nocookie.com/embed/gxBkghlglTg}Then example.mdx renders as:
Styled Link(:link)h2
Use the :link directive from remark-directive-sugar to add links with avatars or favicons for GitHub, npm, or custom URLs. Customize via the link option in plugins/index.ts and style under /* :link */ in src/styles/pro.css.
Link to a GitHub user or organization (prepend id with @)
Example 1: :link[Dnzzk2]{#@Dnzzk2} links to the GitHub profile of the project maintainer, Dnzzk2.
Example 2: :link[Vite]{id=@vitejs} links to the GitHub profile of the Vite organization.
Example 3: :link{#@Dnzzk2 tab=repositories} links directly to the repositories tab of the GitHub user, like Dnzzk2. For GitHub users, valid tab options: 'repositories','projects', 'packages', 'stars', 'sponsoring', 'sponsors'.
Example 4: :link{#@vitejs tab=org-people} links directly to the people section of a GitHub organization, like vitejs. For GitHub organizations, valid tab options: 'org-repositories', 'org-projects', 'org-packages', 'org-sponsoring', and 'org-people'.
Link to a GitHub repository
Example 5: :link[Astro]{#withastro/astro} or :link[Astro]{id=withastro/astro} creates a link to Astro repo.
Link to an npm package
Example 6: :link{#remark-directive-sugar} links to the npm homepage of the remark-directive-sugar.
Example 7: :link{id=remark-directive-sugar tab=dependencies} links to the dependencies section of the remark-directive-sugar on npm. For npm package, valid tab options: 'readme', 'code', 'dependencies', 'dependents', and 'versions'.
Link to a custom URL (must use id, not #)
Example 8: :link{id=https://developer.mozilla.org/en-US/docs/Web/JavaScript} creates an external link to the developer.mozilla.org/en-US/docs/Web....
Example 9: :link[Google]{id=https://www.google.com/} creates an external link to the Google.
Customization
Example 10: :link[Vite]{id=@vitejs url=https://vite.dev/} creates a Vite to https://vite.dev/ instead of https://github.com/vitejs by using the url.
Example 11: :link[Vite]{id=@vitejs img=https://vitejs.dev/logo.svg} creates a Vite that displays a custom logo by using the img.
Example 12: :link{id=Dnzzk2/Litos class=github} creates a Dnzzk2/Litos with class=github (or .github) to override the default style of a GitHub repository.
Example 13: :link[Litos Themes]{id=https://github.com/Dnzzk2/Litos img=https://github.githubassets.com/assets/mona-e50f14d05e4b.png} fully customizes a link. Litos Themes
Badgesh2
Use the :badge directive from remark-directive-sugar to display small pieces of information, such as status or category.
The theme provides the following one predefined badges. You can customize them via the badge option in plugins/index.ts and style them under /* :badge */ in src/styles/pro.css.
badge-n: NEW
Additionally, you can direct use :badge[text]{attrs} for easy visual customization of badges. For example: :badge[ISSUE]{style="background-color: #bef264"} will display as ISSUE. If no color is specified, the default appearance will look like This.
Details Dropdownh2
:::details::summary[Details Dropdown]
- List item 1- List item 2- List item 3- List item 4 :::Details Dropdown
- List item 1
- List item 2
- List item 3
- List item 4
Additionally, it also supports usage similar to the examples in remark-directive.
rehype-callouts
remark-imgattr
Dnzzk2
Vite
Astro