npm install react-markdown

import React from "react";
import "./styles.css";

import ReactMarkdown from "react-markdown";

export default function App() {
  const markdown = `
  # Header 1
  ## Header 2

  _ italic _

  ** bold **

  <b> bold Html </b>
  `;

  return (
    <div className="App">
      <ReactMarkdown source={markdown} />
    </div>
  );
}

return (
    <div className="App">
      <ReactMarkdown source={markdown} />
    </div>
  );

function App() {
	return <ReactMarkdown source={source}
						  renderers={{
						  	inlineCode: InlineCodeBlock
						  }}
}

function InlineCodeBlock(props) {
	return (
		<span style={{background: '##ff0'}}>
			{props.value}
		</span>
	)
}

const parseHtml = htmlParser ({
   isValidNode : ( node ) => node . type ! == ' script ' ,

      processingInstructions : [
     / * ... * / 
  ]
})

< ReactMarkdown  astPlugins = { [ parseHtml ] }  allowDangerousHtml  children = { markdown } />

function App() {
	return <ReactMarkdown source={markdown}
						  skipHtml={false}
                          escapeHtml={false}
                          astPlugins={[parseHtml]}
                          renderers={{}}/>
}