React js -在表单中应用正则表达式

import React, { useState } from 'react';

const MyForm = () => {
  const [inputValue, setInputValue] = useState('');
  const [isValid, setIsValid] = useState(true);

  const handleInputChange = (e) => {
    const value = e.target.value;
    setInputValue(value);

    // 使用正则表达式验证输入值
    const regex = /^[A-Za-z]+$/; // 只允许字母
    setIsValid(regex.test(value));
  };

  const handleSubmit = (e) => {
    e.preventDefault();
    if (isValid) {
      // 处理表单提交逻辑
    } else {
      // 显示错误消息或其他处理
    }
  };

  return (
    <form onSubmit={handleSubmit}>
      <input type="text" value={inputValue} onChange={handleInputChange} />
      <button type="submit">提交</button>
      {!isValid && <p>请输入字母</p>}
    </form>
  );
};

export default MyForm;