shiki

This plugin will enable syntax highlighting for markdown code fence with Shiki.

Tips

Shiki is the syntax highlighter being used by VSCode. It has higher fidelity, but it could be slower than Prism.js, especially when you have a lot of code blocks.

Usage

npm i -D @vuepress/plugin-shiki@next

.vuepress/config.ts
import { shikiPlugin } from '@vuepress/plugin-shiki'

export default {
  plugins: [
    shikiPlugin({
      // options
      langs: ['ts', 'json', 'vue', 'md', 'bash', 'diff'],
    }),
  ],
}

Options

langs

Type: ShikiLang[]
Details:
Additional languages to be parsed by Shiki.
Tips
The plugin now automatically loads the languages used in your markdown files, so you don't need to specify them manually.
Also see:
- Shiki > Languages

langAlias

Type: { [lang: string]: string }
Details: Customize language aliases for Shiki.
Also see:
- Shiki > Custom Language Aliases

theme

Type: ShikiTheme
Default: 'nord'
Details: Theme of Shiki, will be applied to code blocks.
Also see:
- Shiki > Themes

themes

Type: { light: ShikiTheme; dark: ShikiTheme }
Details:
Dark / Light Dual themes of Shiki.
The styles of the 2 themes will be injected as --shiki-light and --shiki-dark to code blocks:
```
<span style="--shiki-light:lightColor;--shiki-dark:darkColor;">code</span>
```
Also see:
- Shiki > Dual Themes

lineNumbers

Type: boolean | number | 'disable'
Default: true
Details:
- number: the minimum number of lines to enable line numbers.
  For example, if you set it to 4, line numbers will only be enabled when your code block has at least 4 lines of code.
- true: enable line numbers globally.
- false: disable line numbers globally.
- 'disable': Completely disable line numbers, :line-numbers will not take effect.
You can add :line-numbers / :no-line-numbers mark in your fenced code blocks to override the value set in config, and customize the beginning number by adding = after :line-numbers. For example, :line-numbers=2 means the line numbers in code blocks will start from 2.

Input:

```ts:line-numbers
// line-numbers is enabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'
```

```ts :no-line-numbers
// line-numbers is disabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'
```

```ts :line-numbers=2
// line-numbers is enabled and start from 2
const line3 = 'This is line 3'
const line4 = 'This is line 4'
```

Output:

// line-numbers is enabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'

// line-numbers is disabled
const line2 = 'This is line 2'
const line3 = 'This is line 3'

// line-numbers is enabled and start from 2
const line3 = 'This is line 3'
const line4 = 'This is line 4'

highlightLines

Type: boolean
Default: true
Details:
Whether enable code line highlighting. You can highlight specified lines of your code blocks by adding line ranges mark in your fenced code blocks:
- Line ranges: {5-8}
- Multiple single lines: {4,7,9}
- Combined: {4,7-13,16,23-27,40}

Input:

```ts {1,7-9}
import { defaultTheme } from '@vuepress/theme-default'
import { defineUserConfig } from 'vuepress'

export default defineUserConfig({
  title: 'Hello, VuePress',

  theme: defaultTheme({
    logo: 'https://vuepress.vuejs.org/images/hero.png',
  }),
})
```

Output:

import { defaultTheme } from '@vuepress/theme-default'
import { defineUserConfig } from 'vuepress'

export default defineUserConfig({
  title: 'Hello, VuePress',

  theme: defaultTheme({
    logo: 'https://vuepress.vuejs.org/images/hero.png',
  }),
})

collapsedLines

Type: boolean | number | 'disable'
Default: 'disable'
Details: Default behavior of code block collapsing.
- number: collapse the code block starting from line number by default, for example, 12 means collapsing the code block starting from line 12.
- true: Equivalent to 15, collapsing the code block starting from line 15 by default.
- false: Add support for code block collapsing, but disable it globally
- 'disable': Completely disable code block collapsing, :collapsed-lines will not take effect.
To override global settings, you can add the :collapsed-lines / :no-collapsed-lines marker to the code block. You can also add = after :collapsed-lines to customize the starting line number being collapsed, for example, :collapsed-lines=12 means collapsing the code block starting from line 12.

Input:

<!-- Collapsed by default starting from line 15 -->

```css :collapsed-lines
html {
  margin: 0;
  background: black;
  height: 100%;
}
/* ... more code */
```

<!-- Disabled collapsed -->

```css :no-collapsed-lines
html {
  margin: 0;
  background: black;
  height: 100%;
}
/* ... more code */
```

<!-- Collapsed starting from line 10 -->

```css :collapsed-lines=10
html {
  margin: 0;
  background: black;
  height: 100%;
}
/* ... more code */
```

Output:

html {
  margin: 0;
  background: black;
  height: 100%;
}

body {
  margin: 0;
  width: 100%;
  height: inherit;
}

/* the three main rows going down the page */

body > div {
  height: 25%;
}

.thumb {
  float: left;
  width: 25%;
  height: 100%;
  object-fit: cover;
}

.main {
  display: none;
}

.blowup {
  display: block;
  position: absolute;
  object-fit: contain;
  object-position: center;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
}

.darken {
  opacity: 0.4;
}

html {
  margin: 0;
  background: black;
  height: 100%;
}

body {
  margin: 0;
  width: 100%;
  height: inherit;
}

/* the three main rows going down the page */

body > div {
  height: 25%;
}

.thumb {
  float: left;
  width: 25%;
  height: 100%;
  object-fit: cover;
}

.main {
  display: none;
}

.blowup {
  display: block;
  position: absolute;
  object-fit: contain;
  object-position: center;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
}

.darken {
  opacity: 0.4;
}

html {
  margin: 0;
  background: black;
  height: 100%;
}

body {
  margin: 0;
  width: 100%;
  height: inherit;
}

/* the three main rows going down the page */

body > div {
  height: 25%;
}

.thumb {
  float: left;
  width: 25%;
  height: 100%;
  object-fit: cover;
}

.main {
  display: none;
}

.blowup {
  display: block;
  position: absolute;
  object-fit: contain;
  object-position: center;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
}

.darken {
  opacity: 0.4;
}

codeBlockTitle

Type: boolean | CodeBlockTitleRender

type CodeBlockTitleRender = (title: string, code: string) => string

Default: true
Details: Whether to enable code block title rendering. Add title="Title" after the code block ``` to set the title.
Pass CodeBlockTitleRender to customize the title rendering.

Example:

Input:

```ts title="foo/baz.js"
console.log('hello')
```

Output:

foo/baz.js
console.log('hello')

notationDiff

Type: boolean
Default: false
Details: Whether enable notation diff.

Example:

Input:

```ts
console.log('hewwo') // [!code --]
console.log('hello') // [!code ++]
console.log('goodbye')
```

Output:

console.log('hewwo') 
console.log('hello') 
console.log('goodbye')

Also see:
- Shiki > Notation Diff

notationFocus

Type: boolean
Default: false
Details: Whether enable notation focus.

Example:

Input:

```ts
console.log('Not focused')
console.log('Focused') // [!code focus]
console.log('Not focused')
```

Output:

console.log('Not focused')
console.log('Focused') 
console.log('Not focused')

Also see:
- Shiki > Notation Focus

notationHighlight

Type: boolean
Default: false
Details: Whether enable notation highlight.

Example:

Input:

```ts
console.log('Not highlighted')
console.log('Highlighted') // [!code highlight]
console.log('Not highlighted')
```

Output:

console.log('Not highlighted')
console.log('Highlighted') 
console.log('Not highlighted')

Also see:
- Shiki > Notation Highlight

notationErrorLevel

Type: boolean
Default: false
Details: Whether enable notation error level.

Example:

Input:

```ts
console.log('No errors or warnings')
console.warn('Warning') // [!code warning]
console.error('Error') // [!code error]
```

Output:

console.log('No errors or warnings')
console.warn('Warning') 
console.error('Error')

Also see:
- Shiki > Notation Error Level

notationWordHighlight

Type: boolean
Default: false
Details: Whether enable notation word highlight.
Word highlight must be written on a separate line.

Example:

Input:

```ts
// [!code word:Hello]
const message = 'Hello World'
console.log(message) // prints Hello World
```

Output:

const message = 'Hello World'
console.log(message) // prints Hello World

Example：Highlight words based on the meta string provided on the code snippet

Input:

```js /Hello/
const msg = 'Hello World'
console.log(msg)
console.log(msg) // prints Hello World
```

Output:

const msg = 'Hello World'
console.log(msg)
console.log(msg) // prints Hello World

Also see:
- Shiki > Notation Word Highlight

whitespace

Type: boolean | 'all' | 'boundary' | 'trailing'
Default: false
Details: Whether enable whitespace characters (Space and Tab).
- true: enable whitespace, but not render any whitespace by default
- false: completely disable render whitespace, :whitespace will not take effect.
- 'all': render all whitespace
- 'boundary': render leading and trailing whitespace of the line
- 'trailing': render trailing whitespace of the line
You can add :whitespace / :no-whitespace mark in your fenced code blocks to override the value set in config, and customize the render type by adding = after :whitespace. For example :whitespace=boundary will render leading and trailing whitespace of the line.

Example:

Input:

```md :whitespace
<!-- render all whitespace -->

A text  
with trailing spaces

    indented text
```

```md :whitespace=boundary
<!-- render leading and trailing whitespace of the line -->

A text  
with trailing spaces

    indented text
```

```md :whitespace=trailing
<!-- render trailing whitespace of the line -->

A text  
with trailing spaces

    indented text
```

```md :no-whitespace
<!-- disable render whitespace -->

A text  
with trailing spaces

    indented text
```

Output:

<!-- render all whitespace -->

A text  
with trailing spaces

    indented text

<!-- render leading and trailing whitespace of the line -->

A text  
with trailing spaces

    indented text

<!-- render trailing whitespace of the line -->

A text  
with trailing spaces

    indented text

<!-- disable render whitespace -->

A text  
with trailing spaces

    indented text

Also see：
- Shiki > Render Whitespace

twoslash

Type: boolean | ShikiTwoslashOptions

interface ShikiTwoslashOptions extends TransformerTwoslashOptions {
  /**
   * Requires adding `twoslash` to the code block explicitly to run twoslash
   * @default true
   */
  explicitTrigger?: RegExp | boolean

  /**
   * twoslash options
   */
  twoslashOptions?: TransformerTwoslashOptions['twoslashOptions'] &
    VueSpecificOptions

  /**
   * The options for caching resolved types
   * @default true
   */
  typesCache?: TwoslashTypesCache | boolean
}

Default: false
Details: Whether enable twoslash.
Tips
For size reasons, the plugin does not include the @vuepress/shiki-twoslash package by default. If you want to use it, you need to install it manually.
Also see:
Example:
Input:
```
```ts twoslash
const a = 1
const b = 2
console.log(a + b)
```
```
Output:
```
const a
 = 1
const b
 = 23
console
.log
(a
 + b
)
```
Warning
For code blocks that have twoslash enabled:
- Do not add the :v-pre marker in the code block, as this will cause twoslash to fail to run properly.
- To avoid layout conflicts, code blocks will no longer display line numbers.

Advanced Options

defaultLang

Type: string
Default: ''
Details: Fallback language when the specified language is not available.

logLevel

Type: 'warn' | 'debug' | 'silent'
Default: 'warn'
Details:
Log level of Shiki language detection.
- warn: warn each unknown lang one time (default)
- debug: log every unknown code block with its file path. (default when --debug flag is set)
- silent: no warning

preWrapper

Type: boolean
Default: true
Details:
Adds extra wrapper outside <pre> tag or not.
The wrapper is required by the lineNumbers and collapsedLines. That means, if you disable preWrapper, the line line numbers and collapsed lines will also be disabled.

shikiSetup

Type: (shiki: Highlighter) => void | Promise<void>
Details: A function hook to customize Shiki highlighter instance.

transformers

Type: ShikiTransformer[]
Details:
Transformers of Shiki.
This option will be forwarded to codeToHtml() method of Shiki.
Also see:
- Shiki > Transformers