rehype-shikiji

rehype plugin for Shikiji.

Install

npm i -D rehype-shikiji

Usage

import { unified } from 'unified'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import rehypeStringify from 'rehype-stringify'
import rehypeShikiji from 'rehype-shikiji'

const file = await unified()
  .use(remarkParse)
  .use(remarkRehype)
  .use(rehypeShikiji, {
    // or `theme` for a single theme
    themes: {
      light: 'vitesse-light',
      dark: 'vitesse-dark',
    }
  })
  .use(rehypeStringify)
  .process(await fs.readFile('./input.md'))

Fine-grained Bundle

By default, the full bundle of shikiji will be imported. If you are Shikiji's fine-grained bundle, you can import rehypeShikijiFromHighlighter from rehype-shikiji/core and pass your own highlighter:

import { unified } from 'unified'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import rehypeStringify from 'rehype-stringify'
import rehypeShikijiFromHighlighter from 'rehype-shikiji/core'

import { fromHighlighter } from 'markdown-it-shikiji/core'
import { getHighlighterCore } from 'shikiji/core'
import { getWasmInlined } from 'shikiji/wasm'

const highlighter = await getHighlighterCore({
  themes: [
    import('shikiji/themes/vitesse-light.mjs')
  ],
  langs: [
    import('shikiji/langs/javascript.mjs'),
  ],
  loadWasm: getWasmInlined
})

const raw = await fs.readFile('./input.md')
const file = await unified()
  .use(remarkParse)
  .use(remarkRehype)
  .use(rehypeShikijiFromHighlighter, highlighter, {
    // or `theme` for a single theme
    themes: {
      light: 'vitesse-light',
      dark: 'vitesse-dark',
    }
  })
  .use(rehypeStringify)
  .processSync(raw) // it's also possible to process synchronously

Features

Line Highlight

In addition to the features of shikiji, this plugin also supports line highlighting. You can add {1,3-4} after the language name to highlight the specified lines. For example:

# Hello World

```js {1,3-4}
console.log('line1') // highlighted
console.log('line2')
console.log('line3') // highlighted
console.log('line4') // highlighted
```