React组件渲染故障排查：按钮点击不显示弹窗表单的解决方案

const MyComponent = () => {
  // State declarations go here

  return (
    <div>
      {/* JSX elements */}
    </div>
  );
};

import React, { useState } from 'react'; // 确保引入 useState
import './App.css'; // 假设存在相应的CSS文件

const InventoryManager = () => {
  // 声明状态变量
  const [showPopup, setShowPopup] = useState(false); // 控制弹窗的显示/隐藏
  const [itemName, setItemName] = useState('');
  const [itemDescription, setItemDescription] = useState('');
  const [itemPrice, setItemPrice] = useState('');
  const [itemImage, setItemImage] = useState('');

  // 模拟添加项目逻辑（此处仅为示例，可根据实际需求扩展）
  const handleAddItem = (e) => {
    e.preventDefault(); // 阻止表单默认提交行为

    const newItem = {
      name: itemName,
      description: itemDescription,
      price: itemPrice,
      image: itemImage,
    };
    console.log('New item to add:', newItem);
    // 在实际应用中，这里会调用一个函数来将newItem添加到库存列表
    // 例如：dispatch(addItem(newItem)); 或调用父组件传递的函数

    // 重置输入字段
    setItemName('');
    setItemDescription('');
    setItemPrice('');
    setItemImage('');

    // 关闭弹窗
    setShowPopup(false);
  };

  // 清空表单字段
  const handleClearForm = () => {
    setItemName('');
    setItemDescription('');
    setItemPrice('');
    setItemImage('');
  };

  return (
    <div>
      <h1>Inventory Manager</h1>

      <div id="buttons">
        <button onClick={() => setShowPopup(true)}>Add Item</button>
      </div>

      {/* 条件渲染弹窗：当 showPopup 为 true 时才渲染 */}
      {showPopup && (
        <div id="add-item-popup" className="popup-overlay"> {/* 添加一个类用于样式 */}
          <div className="popup-content"> {/* 弹窗内容容器 */}
            <div id="popup-header">
              <h2>Add Item</h2>
              <button id="close-button" onClick={() => setShowPopup(false)}>
                X
              </button>
            </div>
            {/* 完整的表单结构 */}
            <form onSubmit={handleAddItem}>
              <div className="form-group">
                <label htmlFor="item-name">Item Name:</label>
                <input
                  type="text"
                  id="item-name"
                  value={itemName}
                  onChange={(e) => setItemName(e.target.value)}
                  placeholder="Enter item name"
                  required
                />
              </div>
              <div className="form-group">
                <label htmlFor="item-description">Description:</label>
                <textarea
                  id="item-description"
                  value={itemDescription}
                  onChange={(e) => setItemDescription(e.target.value)}
                  placeholder="Enter item description"
                  rows="3"
                ></textarea>
              </div>
              <div className="form-group">
                <label htmlFor="item-price">Price:</label>
                <input
                  type="number"
                  id="item-price"
                  value={itemPrice}
                  onChange={(e) => setItemPrice(e.target.value)}
                  placeholder="Enter item price"
                  min="0"
                  step="0.01"
                  required
                />
              </div>
              <div className="form-group">
                <label htmlFor="item-image">Image URL:</label>
                <input
                  type="text"
                  id="item-image"
                  value={itemImage}
                  onChange={(e) => setItemImage(e.target.value)}
                  placeholder="Enter image URL"
                />
              </div>
              <div className="form-actions">
                <button type="submit">Add Item</button>
                <button type="button" onClick={handleClearForm}>Clear Form</button>
              </div>
            </form>
          </div>
        </div>
      )}

      <div id="inventory-gallery">{/* Render inventory items here */}</div>
    </div>
  );
};

export default InventoryManager;