rehype-react
rehype plugin to transform to React
Last updated 2 months ago by wooorm .
MIT · Repository · Bugs · Original npm · Tarball · package.json
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rehype-react

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rehype plugin to transform to React.

Install

npm:

npm install rehype-react

Use

The following example shows how to create a Markdown input textarea, and corresponding rendered HTML output. The Markdown is processed to add a Table of Contents, highlight code blocks, and to render GitHub mentions (and other cool GH features).

import React from 'react'
import ReactDOM from 'react-dom'
import unified from 'unified'
import markdown from 'remark-parse'
import slug from 'remark-slug'
import toc from 'remark-toc'
import github from 'remark-github'
import remark2rehype from 'remark-rehype'
import highlight from 'rehype-highlight'
import rehype2react from 'rehype-react'

var processor = unified()
  .use(markdown)
  .use(slug)
  .use(toc)
  .use(github, {repository: 'rehypejs/rehype-react'})
  .use(remark2rehype)
  .use(highlight)
  .use(rehype2react, {createElement: React.createElement})

class App extends React.Component {
  constructor() {
    super()
    this.state = {text: '# Hello\n\n## Table of Contents\n\n## @rhysd'}
    this.onChange = this.onChange.bind(this)
  }

  onChange(ev) {
    this.setState({text: ev.target.value})
  }

  render() {
    return (
      <div>
        <textarea value={this.state.text} onChange={this.onChange} />
        <div id="preview">
          {processor.processSync(this.state.text).result}
        </div>
      </div>
    )
  }
}

ReactDOM.render(<App />, document.querySelector('#root'))

Yields (in id="preview", on first render):

<div><h1 id="hello">Hello</h1>
<h2 id="table-of-contents">Table of Contents</h2>
<ul>
<li><a href="#rhysd">@rhysd</a></li>
</ul>
<h2 id="rhysd"><a href="https://github.com/rhysd"><strong>@rhysd</strong></a></h2></div>

API

origin.use(rehype2react[, options])

rehype (hast) plugin to transform to React.

Typically, unified compilers return string. This compiler returns a ReactElement. When using .process or .processSync, the value at file.result (or when using .stringify, the return value), is a ReactElement. When using TypeScript, cast the type on your side.

ℹ️ In unified@9.0.0, the result of .process changed from file.contents to file.result.

options
options.createElement

How to create elements or components (Function). You should typically pass React.createElement.

options.Fragment

Create fragments instead of an outer <div> if available (symbol). You should typically pass React.Fragment.

options.components

Override default elements (such as <a>, <p>, etcetera) by passing an object mapping tag names to components (Object.<Component>, default: {}).

For example, to use <MyLink> components instead of <a>, and <MyParagraph> instead of <p>, so something like this:

  // …
  .use(rehype2react, {
    createElement: React.createElement,
    components: {
      a: MyLink,
      p: MyParagraph
    }
  })
  // …
options.prefix

React key prefix (string, default: 'h-').

options.passNode

Pass the original hast node as props.node to custom React components (boolean, default: false).

Security

Use of rehype-react can open you up to a cross-site scripting (XSS) attack if the tree is unsafe. Use rehype-sanitize to make the tree safe.

Related

Contribute

See contributing.md in rehypejs/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

License

MIT © Titus Wormer, modified by Tom MacWright, Mapbox, and rhysd.

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