Data Propagation

The ProductList component that we defined in the previous section is impractical. Let's take a look at it again:

import React from 'react';
import './ProductList.css';

class ProductList extends React.Component {
  render() {
    return <ul>
      <li>
        <h3>Traditional Merlot</h3>
        <p>A bottle of middle weight wine, lower in tannins (smoother), 
           with a more red-fruited flavor profile.</p>
      </li>
      <li>
        <h3>Classic Chianti</h3>
        <p>A medium-bodied wine characterized by a marvelous freshness with 
           a lingering, fruity finish</p>
      </li>
      <li>
        <h3>Chardonnay</h3>
        <p>A dry full-bodied white wine with spicy, bourbon-y notes in an 
           elegant bottle</p>
      </li>
      <li>
        <h3>Brunello di Montalcino</h3>
        <p>A bottle of red wine with...