<pre class="language-javascript"><code class="language-javascript">
/**
 * @param {string} str
 * @return {boolean}
 */
function isValidIP(str) {
 let IPv4Regex = new RegExp(/^((\d|[1-9]\d|1\d\d|2[0-5][0-5])\.){4}$/)
 let IPv6Regex = new RegExp(/^([0-9a-fA-F]{1,4}:){8}$/)
 return IPv4Regex.test(str + '.') || IPv6Regex.test(str + ':')
}
</code></pre>

RegExp

IPV4 An IPv4 Address is represented in dot-decimal notation, consisting of 4 numbers( called 'octet'), each ranging from 0 to 255, like 1.22.33.255. I…