如何在React中点击按钮时过滤产品

import React, { Component } from 'react';

class ProductList extends Component {
  constructor(props) {
    super(props);
    this.state = {
      products: [
        { id: 1, name: 'Product 1', category: 'Category 1' },
        { id: 2, name: 'Product 2', category: 'Category 2' },
        { id: 3, name: 'Product 3', category: 'Category 1' },
        { id: 4, name: 'Product 4', category: 'Category 2' },
      ],
      filter: '',
    };
  }

  handleFilterChange = (event) => {
    this.setState({ filter: event.target.value });
  };

  render() {
    const { products, filter } = this.state;
    const filteredProducts = products.filter((product) =>
      product.category.includes(filter)
    );

    return (
      <div>
        <input
          type="text"
          value={filter}
          onChange={this.handleFilterChange}
          placeholder="Enter filter keyword"
        />
        <ul>
          {filteredProducts.map((product) => (
            <li key={product.id}>{product.name}</li>
          ))}
        </ul>
      </div>
    );
  }
}

export default ProductList;