React中的嵌套表单状态和一个onChange函数

import React, { useState } from 'react';

const NestedFormExample = () => {
  const [formState, setFormState] = useState({
    name: '',
    email: '',
    address: {
      street: '',
      city: '',
      state: ''
    }
  });

  const handleInputChange = (event) => {
    const { name, value } = event.target;

    // 如果表单元素是嵌套在对象中的，需要使用展开运算符来更新嵌套的状态
    if (name.includes('.')) {
      const [parent, child] = name.split('.');
      setFormState(prevState => ({
        ...prevState,
        [parent]: {
          ...prevState[parent],
          [child]: value
        }
      }));
    } else {
      setFormState(prevState => ({
        ...prevState,
        [name]: value
      }));
    }
  };

  const handleSubmit = (event) => {
    event.preventDefault();
    // 在这里可以处理表单提交逻辑
    console.log(formState);
  };

  return (
    <form onSubmit={handleSubmit}>
      <label>
        Name:
        <input
          type="text"
          name="name"
          value={formState.name}
          onChange={handleInputChange}
        />
      </label>
      <br />
      <label>
        Email:
        <input
          type="email"
          name="email"
          value={formState.email}
          onChange={handleInputChange}
        />
      </label>
      <br />
      <label>
        Street:
        <input
          type="text"
          name="address.street"
          value={formState.address.street}
          onChange={handleInputChange}
        />
      </label>
      <br />
      <label>
        City:
        <input
          type="text"
          name="address.city"
          value={formState.address.city}
          onChange={handleInputChange}
        />
      </label>
      <br />
      <label>
        State:
        <input
          type="text"
          name="address.state"
          value={formState.address.state}
          onChange={handleInputChange}
        />
      </label>
      <br />
      <button type="submit">Submit</button>
    </form>
  );
};

export default NestedFormExample;