A demo of react-markdown

react-markdown is a markdown component for React.

👉 Changes are re-rendered as you type.

👈 Try writing some markdown on the left.

Overview

• Follows CommonMark
• Optionally follows GitHub Flavored Markdown
• Renders actual React elements instead of using dangerouslySetInnerHTML
• Lets you define your own components (to render MyHeading instead of h1)
• Has a lot of plugins

Table of contents

Here is an example of a plugin in action (remark-toc). This section is replaced by an actual table of contents.

Syntax highlighting

Here is an example of a plugin to highlight code: rehype-highlight.

import React from 'react'
import ReactDOM from 'react-dom'
import ReactMarkdown from 'react-markdown'
import rehypeHighlight from 'rehype-highlight'

ReactDOM.render(
    <ReactMarkdown rehypePlugins={[rehypeHighlight]}>{'# Your markdown here'}</ReactMarkdown>,
    document.querySelector('#content')
)

Pretty neat, eh?

GitHub flavored markdown (GFM)

For GFM, you can also use a plugin: remark-gfm. It adds support for GitHub-specific extensions to the language: tables, strikethrough, tasklists, and literal URLs.

These features do not work by default. 👆 Use the toggle above to add the plugin.

Feature	Support
CommonMark	100%
GFM	100% w/ remark-gfm

strikethrough

• task list
• checked item

https://example.com

HTML in markdown

⚠️ HTML in markdown is quite unsafe, but if you want to support it, you can use rehype-raw. You should probably combine it with rehype-sanitize.

👆 Use the toggle above to add the plugin.

Components

You can pass components to change things:

import React from 'react'
import ReactDOM from 'react-dom'
import ReactMarkdown from 'react-markdown'
import MyFancyRule from './components/my-fancy-rule.js'

ReactDOM.render(
    <ReactMarkdown
        components={{
            // Use h2s instead of h1s
            h1: 'h2',
            // Use a component instead of hrs
            hr: ({node, ...props}) => <MyFancyRule {...props} />
        }}
    >
        # Your markdown here
    </ReactMarkdown>,
    document.querySelector('#content')
)

More info?

Much more info is available in the readme on GitHub!

---

index.js
// asyncをつける
async function displayUser() {
    // getUser()は非同期処理。awaitをつける
    let result = await getUser();
    console.log(result);
}