docusaurus/lib/core/devEntry.js

import React from 'react';
import {render} from 'react-dom';
import {BrowserRouter, Route, Switch, Link} from 'react-router-dom';
import blogMetadata from '@generated/blogMetadata';
import docsMetadata from '@generated/docsMetadata';
import Blog from './blog';
import Docs from './docs';

const renderBlog = props => {
  const metadata = blogMetadata.find(blog => blog.path === props.match.path);
  return <Blog content={metadata.content} {...props} />;
};
const renderDocs = props => {
  const metadata = docsMetadata.find(doc => doc.path === props.match.path);
  return <Docs content={metadata.content} {...props} />;
};

class App extends React.Component {
  render() {
    return (
      <BrowserRouter>
        <div>
          <Switch>
            {blogMetadata.map(({path, content}) => (
              <Route key={path} exact path={path} render={renderBlog} />
            ))}
            {docsMetadata.map(({path}) => (
              <Route key={path} exact path={path} render={renderDocs} />
            ))}
          </Switch>
        </div>
      </BrowserRouter>
    );
  }
}
render(<App />, document.getElementById('app'));