React Base Fiddle (JSX)

Starting point for creating JSFiddles with React.

HTML

<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

Babel + JSX

const ProductForm = ({ data, index, handleProductChange }) => {
    return (
      <li>
        <h2>{data.title}</h2>
        <label>Price:</label>
        <input name="price" type="text" value={data.price || ""} onChange={(e) => handleProductChange(e, index)} />
      </li>
    );
  }

const App = () => {

	// List of products
	const [products, setProducts] = React.useState([
  {
  	title: 'My Product',
  },
  {
  	title: 'My Product 2',
  }
  ]);
  
  
  // Simple debug to track changes
  React.useEffect(() => {
  	console.log('PRODUCTS', products);
  }, [products]);
  
  const handleProductChange = (e, index) => {
      const { name, value } = e.target;
      const allProducts = [...products];
      const selectedProduct = {...allProducts[index]};
      allProducts[index] = {
        ...selectedProduct,
        [name]: value
      };
      setProducts([ ...allProducts ]);
    }
  
  return <ul>{products.map((item, index) => <ProductForm key={item.title} index={index} data={item} handleProductChange={handleProductChange} />)}</ul>;
}

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