<pre class="shiki github-dark shaku"><code>/** * @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…