js ip地址的格式校验

const ipv4Regex = /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;

function isValidIPv4(ip) {
    return ipv4Regex.test(ip);
}

console.log(isValidIPv4('192.168.1.1')); // true
console.log(isValidIPv4('256.256.256.256')); // false

const ipv6Regex = /^(?:[A-F0-9]{1,4}:){7}[A-F0-9]{1,4}$/i;

function isValidIPv6(ip) {
    return ipv6Regex.test(ip);
}

console.log(isValidIPv6('2001:0db8:85a3:0000:0000:8a2e:0370:7334')); // true
console.log(isValidIPv6('2001:0db8:85a3::8a2e:0370:7334')); // false (简化版本需要更复杂的正则表达式)