js邮箱的格式

const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

function validateEmail(email) {
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(email);
}

// 测试示例
console.log(validateEmail("example@example.com")); // true
console.log(validateEmail("example.example.com")); // false
console.log(validateEmail("example@.com")); // false
console.log(validateEmail("example@com")); // false

const strictEmailRegex = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;

function validateStrictEmail(email) {
  const strictEmailRegex = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
  return strictEmailRegex.test(email);
}

// 测试示例
console.log(validateStrictEmail("example@example.com")); // true
console.log(validateStrictEmail("example.example.com")); // false
console.log(validateStrictEmail("example@.com")); // false
console.log(validateStrictEmail("example@com")); // false
console.log(validateStrictEmail("user.name+tag+sorting@example.com")); // true