free things to use in react code example

Example 1: what is react

React is a JavaScript library for building user interfaces.

It is maintained by Facebook and a community of individual developers and
companies.

React can be used as a base in the development of single-page or mobile
applications.

Example 2: react.js

class ShoppingList extends React.Component {
  render() {
    return (
      <div className="shopping-list">
        <h1>Shopping List for {this.props.name}</h1>
        <ul>
          <li>Instagram</li>
          <li>WhatsApp</li>
          <li>Oculus</li>
        </ul>
      </div>
    );
  }
}

// Example usage: <ShoppingList name="Mark" />