---
sidebarDepth: 3
---
# Markdown Extensions
## Header Anchors
Headers automatically get anchor links applied. Rendering of anchors can be configured using the `markdown.anchor` option.
## Links
### Internal Links
Internal links are converted to router link for SPA navigation. Also, every `index.md` contained in each sub-directory will automatically be converted to `index.html` , with corresponding URL `/` .
For example, given the following directory structure:
```
.
├─ index.md
├─ foo
│ ├─ index.md
│ ├─ one.md
│ └─ two.md
└─ bar
├─ index.md
├─ three.md
└─ four.md
```
And providing you are in `foo/one.md` :
```md
[Home ](/ ) <!-- sends the user to the root index.md -->
[foo ](/foo/ ) <!-- sends the user to index.html of directory foo -->
[foo heading ](./#heading ) <!-- anchors user to a heading in the foo index file -->
[bar - three ](../bar/three ) <!-- you can omit extention -->
[bar - three ](../bar/three.md ) <!-- you can append .md -->
[bar - four ](../bar/four.html ) <!-- or you can append .html -->
```
### Page Suffix
Pages and internal links get generated with the `.html` suffix by default.
### External Links
Outbound links automatically get `target="_blank" rel="noopener noreferrer"` :
- [vuejs.org ](https://vuejs.org )
- [VitePress on GitHub ](https://github.com/vuejs/vitepress )
## Frontmatter
[YAML frontmatter ](https://jekyllrb.com/docs/front-matter/ ) is supported out of the box:
```yaml
---
title: Blogging Like a Hacker
lang: en-US
---
```
This data will be available to the rest of the page, along with all custom and theming components.
For more details, see [Frontmatter ](./frontmatter ).
## GitHub-Style Tables
**Input**
```
| Tables | Are | Cool |
| ------------- |:-------------:| -----:|
| col 3 is | right-aligned | $1600 |
| col 2 is | centered | $12 |
| zebra stripes | are neat | $1 |
```
**Output**
| Tables | Are | Cool |
| ------------- | :-----------: | -----: |
| col 3 is | right-aligned | \$1600 |
| col 2 is | centered | \$12 |
| zebra stripes | are neat | \$1 |
## Emoji :tada:
**Input**
```
:tada: :100:
```
**Output**
:tada: :100:
A [list of all emojis ](https://github.com/markdown-it/markdown-it-emoji/blob/master/lib/data/full.json ) is available.
## Table of Contents
**Input**
```
[[toc]]
```
**Output**
[[toc]]
Rendering of the TOC can be configured using the `markdown.toc` option.
## Custom Containers
Custom containers can be defined by their types, titles, and contents.
### Default Title
**Input**
```md
::: tip
This is a tip
:::
::: info
This is an info box
:::
::: warning
This is a warning
:::
::: danger
This is a dangerous warning
:::
::: details
This is a details block, which does not work in Internet Explorer or old versions of Edge.
:::
```
**Output**
::: tip
This is a tip
:::
::: info
This is an info box
:::
::: warning
This is a warning
:::
::: danger
This is a dangerous warning
:::
::: details
This is a details block, which does not work in Internet Explorer or Edge.
:::
### Custom Title
**Input**
````md
::: danger STOP
Danger zone, do not proceed
:::
::: details Click me to view the code
```js
console.log('Hello, VitePress!')
```
:::
````
**Output**
::: danger STOP
Danger zone, do not proceed
:::
::: details Click me to view the code
```js
console.log('Hello, VitePress!')
```
:::
## Syntax Highlighting in Code Blocks
VitePress uses [Prism ](https://prismjs.com ) to highlight language syntax in Markdown code blocks, using coloured text. Prism supports a wide variety of programming languages. All you need to do is append a valid language alias to the beginning backticks for the code block:
**Input**
````
```js
export default {
name: 'MyComponent',
// ...
}
```
````
**Output**
```js
export default {
name: 'MyComponent'
// ...
}
```
**Input**
````
```html
< ul >
< li v-for = "todo in todos" :key = "todo.id" >
{{ todo.text }}
< / li >
< / ul >
```
````
**Output**
```html
< ul >
< li v-for = "todo in todos" :key = "todo.id" >
{{ todo.text }}
< / li >
< / ul >
```
A [list of valid languages ](https://prismjs.com/#languages-list ) is available on Prism’
## Line Highlighting in Code Blocks
**Input**
````
```js{4}
export default {
data () {
return {
msg: 'Highlighted!'
}
}
}
```
````
**Output**
```js{4}
export default {
data () {
return {
msg: 'Highlighted!'
}
}
}
```
In addition to a single line, you can also specify multiple single lines, ranges, or both:
- Line ranges: for example `{5-8}` , `{3-10}` , `{10-17}`
- Multiple single lines: for example `{4,7,9}`
- Line ranges and single lines: for example `{4,7-13,16,23-27,40}`
**Input**
````
```js{1,4,6-8}
export default { // Highlighted
data () {
return {
msg: `Highlighted!
This line isn't highlighted,
but this and the next 2 are.`,
motd: 'VitePress is awesome',
lorem: 'ipsum',
}
}
}
```
````
**Output**
```js{1,4,6-8}
export default { // Highlighted
data () {
return {
msg: `Highlighted!
This line isn't highlighted,
but this and the next 2 are.`,
motd: 'VitePress is awesome',
lorem: 'ipsum',
}
}
}
```
## Line Numbers
You can enable line numbers for each code blocks via config:
```js
module.exports = {
markdown: {
lineNumbers: true
}
}
```
- Demo:
< picture >
< source srcset = "../images/line-numbers-mobile.gif" media = "(max-width: 719px)" >
< img class = "line-numbers-mobile-snap" src = "../images/line-numbers-mobile.gif" alt = "Image" >
< / picture >
< picture >
< source srcset = "../images/line-numbers-desktop.png" media = "(min-width: 720px)" >
< img class = "line-numbers-desktop-snap" src = "../images/line-numbers-desktop.png" alt = "Image" >
< / picture >
< style >
.line-numbers-mobile-snap {
margin: 0 -1.5rem;
width: 100vw;
max-width: none !important;
}
.line-numbers-desktop-snap {
display: none;
}
@media (min-width: 720px) {
.line-numbers-mobile-snap {
display: none;
}
.line-numbers-desktop-snap {
display: block;
}
}
< / style >
## Import Code Snippets
You can import code snippets from existing files via following syntax:
```md
<<< @/filepath
```
It also supports [line highlighting ](#line-highlighting-in-code-blocks ):
```md
<<< @/filepath {highlightLines}
```
**Input**
```md
<< < @/snippets/snippet .js { 2 }
```
**Code file**
<!-- lint disable strong - marker -->
<< < @/snippets/snippet .js
<!-- lint enable strong - marker -->
**Output**
<!-- lint disable strong - marker -->
<< < @/snippets/snippet .js { 2 }
<!-- lint enable strong - marker -->
::: tip
The value of `@` corresponds to the source root. By default it's the VitePress project root, unless `srcDir` is configured.
:::
You can also use a [VS Code region ](https://code.visualstudio.com/docs/editor/codebasics#_folding ) to only include the corresponding part of the code file. You can provide a custom region name after a `#` following the filepath (`snippet` by default):
**Input**
```md
<< < @/snippets/snippet -with-region.js { 1 }
```
**Code file**
<!-- lint disable strong - marker -->
<< < @/snippets/snippet -with-region.js
<!-- lint enable strong - marker -->
**Output**
<!-- lint disable strong - marker -->
<< < @/snippets/snippet -with-region.js # snippet { 1 }
<!-- lint enable strong - marker -->
## Advanced Configuration
VitePress uses [markdown-it ](https://github.com/markdown-it/markdown-it ) as the Markdown renderer. A lot of the extensions above are implemented via custom plugins. You can further customize the `markdown-it` instance using the `markdown` option in `.vitepress/config.js` :
```js
const anchor = require('markdown-it-anchor')
module.exports = {
markdown: {
// options for markdown-it-anchor
// https://github.com/valeriangalliat/markdown-it-anchor#permalinks
anchor: {
permalink: anchor.permalink.headerLink()
},
// options for markdown-it-table-of-contents
toc: { includeLevel: [1, 2] },
config: (md) => {
// use more markdown-it plugins!
md.use(require('markdown-it-xxx'))
}
}
}
```
