React component names must start with an uppercase letter code example

Example: using dot notation in jsx

//Let's implement <Menu> <Menu.Item>Wow, anubra266</Menu.Item></Menu>
// menu.js
import React, { Component } from 'react';

export default const MenuItem = ({ children }) => <li>{children}</li>;

export default class Menu extends Component {
  static Item = MenuItem;

  render() {
    return (
      <ul>{this.props.children}</ul>
    );
  }
}

//----------------------------------------------------------------
//App.js
import React from 'react';
import { render } from 'react-dom';
import Menu from './menu';

const App = () => (
  <Menu>
    <Menu.Item>Home</Menu.Item>
    <Menu.Item>Blog</Menu.Item>
    <Menu.Item>About</Menu.Item>
  </Menu>
);

render(<App />, document.getElementById('root'));