React Base Fiddle (JSX)

Starting point for creating JSFiddles with React.

by Lucas Bittar Magnani

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" // <-- name input field
          type="text"
          value={data.price || ''} // <-- use data.price or fallback value
          onChange={(e) => handleProductChange(e, index)} // <-- pass event and 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]);

  // Update signature to also take index
  const handleProductChange = (e, index) => {
      const { name, value } = e.target; // <-- destructure name and value
      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} // <-- pass callback handler
        />)
      )}
    </ul>
  );
}

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