render-return-types.js

import React, { Component } from "react";
import { render } from "react-dom";

class List extends Component {
  render() {
    return [
      <li key="A">First item</li>,
      <li key="B">Second item</li>,
      <li key="C">Third item</li>
    ];
  }
}

render(<List />, document.getElementById("root"));