reactintro/21.thinkreact.final.html at master · linyutg/reactintro · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>think in react - final</title>
    <meta charset="utf-8" />
    <style>
      body {
        font-family: -apple-system, sans-serif;
      }
    </style>
  </head>
  <body>
    <div id="app"></div>
    <script src="react/react.js"></script>
    <script src="react/react-dom.js"></script>
    <script src="react/babel.js"></script>
    <script type="text/babel">
      const { useState } = React;

      function FilterableProductTable({ products }) {
        const [filterText, setFilterText] = useState("");
        const [inStockOnly, setInStockOnly] = useState(false);

        return (
          <div>
            <SearchBar
              filterText={filterText}
              inStockOnly={inStockOnly}
              onFilterTextChange={setFilterText}
              onInStockOnlyChange={setInStockOnly}
            />
            <ProductTable products={products} filterText={filterText} inStockOnly={inStockOnly} />
          </div>
        );
      }

      function ProductCategoryRow({ category }) {
        return (
          <tr>
            <th colSpan="2">{category}</th>
          </tr>
        );
      }

      function ProductRow({ product }) {
        const name = product.stocked ? (
          product.name
        ) : (
          <span style={{ color: "red" }}>{product.name}</span>
        );

        return (
          <tr>
            <td>{name}</td>
            <td>{product.price}</td>
          </tr>
        );
      }

      function ProductTable({ products, filterText, inStockOnly }) {
        const rows = [];
        let lastCategory = null;

        products.forEach((product) => {
          if (product.name.toLowerCase().indexOf(filterText.toLowerCase()) === -1) {
            return;
          }
          if (inStockOnly && !product.stocked) {
            return;
          }
          if (product.category !== lastCategory) {
            rows.push(<ProductCategoryRow category={product.category} key={product.category} />);
          }
          rows.push(<ProductRow product={product} key={product.name} />);
          lastCategory = product.category;
        });

        return (
          <table>
            <thead>
              <tr>
                <th>Name</th>
                <th>Price</th>
              </tr>
            </thead>
            <tbody>{rows}</tbody>
          </table>
        );
      }

      function SearchBar({ filterText, inStockOnly, onFilterTextChange, onInStockOnlyChange }) {
        return (
          <form>
            <input
              type="text"
              value={filterText}
              placeholder="Search..."
              onChange={(e) => onFilterTextChange(e.target.value)}
            />
            <br />
            <label>
              <input
                type="checkbox"
                checked={inStockOnly}
                onChange={(e) => onInStockOnlyChange(e.target.checked)}
              />{" "}
              Only show products in stock
            </label>
          </form>
        );
      }

      const PRODUCTS = [
        { category: "Fruits", price: "$1", stocked: true, name: "Apple" },
        { category: "Fruits", price: "$1", stocked: true, name: "Dragonfruit" },
        { category: "Fruits", price: "$2", stocked: false, name: "Passionfruit" },
        { category: "Vegetables", price: "$2", stocked: true, name: "Spinach" },
        { category: "Vegetables", price: "$4", stocked: false, name: "Pumpkin" },
        { category: "Vegetables", price: "$1", stocked: true, name: "Peas" },
      ];

      function App() {
        return <FilterableProductTable products={PRODUCTS} />;
      }

      ReactDOM.render(<App />, document.getElementById("app"));
    </script>
  </body>
</html>