rehype-prism

The unified plugin used to highlight code block in html with Prism.

Usage

This package is ESM only: Node 12+ and unified 10 is needed to use it and it must be imported instead of required.

import { unified } from 'unified'
import rehype from 'rehype'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import rehypePrism from 'rehype-prism'
import rehypeStringify from 'rehype-stringify'

// you have to load css manual
import 'prismjs/themes/prism-coy.css'
import 'prismjs/plugins/line-numbers/prism-line-numbers.css'

// load languages manual
// import 'prismjs/components/prism-{language}'
import 'prismjs/components/prism-go'
import 'prismjs/components/prism-java'
import 'prismjs/components/prism-python'

// parse markdown to html
unified()
  .use(remarkParse)
  .use(remarkRehype)
  // it should be after rehype
  .use(rehypePrism, { plugins: ['line-numbers'] })
  .use(rehypeStringify)
  .parse(/* markdown string */)
// .processSync(/* markdown string */)

// parse code block in html string
rehype()
  .use(rehypePrism)
  .use(rehypeStringify)
  .parse(/* html string */)
// .processSync(/* html string */)

Server Side Render

PrismJS will auto highlight all code at pre code after browser document loaded.

Disabled prism autoHighlight before import 'rehype-prism'. there are two way to do this:

• set the window.Prism = { manual: true }

• use the attribute data-manual on the <script> element you used for prism.

  <script src="prism.js" data-manual></script>

Some plugins will not work. Because it's only work in browser.

Load Plugins

The names to use can be found here.

Plugins Reimplemented By rehype-prism

The table list plugins that cannot running on the server side. Therefor it has been re-implemented by rehype-prism.

Plugin Name
line-numbers
toolbar
copy-to-clipboard

I haven't tested all prism plugins. If there are another plugins not work, submit issue on github.

Load More Languages

• Use babel-plugin-prismjs.(Recommend)
• Use loadLanguages() provided by prismjs.(don't use loadLanguages() with Webpack or another bundler)

Load Themes

• If you use babel-plugin-prismjs. import 'prismjs' will auto load the theme setted in babel-plugin-prismjs config.
• Import theme css manual. e.g. import 'prismjs/themes/prism-coy.css'

If in doubt, please submit an issue.

Contributing & Development

If there is any doubt, it is very welcome to discuss the issue together. Please read Contributor Covenant Code of Conduct and CONTRIBUTING.

Changelog

2.2.2 (2023-03-29)

Bug Fixes

• don't import primjs toolbar and copy-to-clipboard plugins (1bab898)