JSFiddle - React, Tailwind, and code Playground

JavaScript

var word = "[0000:0000:0000::0000:0000:0001]"
var url = "http://example.com";
var ipv4 = "212.212.100.110";
var ipv6 = "0000:0000:0000::0000:0000:0001";

var reg = /[\w\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF.-]+\.[a-zA-Z]{2,6}|(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))|((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])/;

if (reg.test(word)) {
    alert("VALID URL " + word);
} else {
	alert("INVALID URL " + word);
}

if (reg.test(url)) {
    alert("VALID URL " + url);
} else {
	alert("INVALID URL " + url);
}

if (reg.test(ipv4)) {
    alert("VALID IPV4 " + ipv4);
} else {
	alert("INVALID IPV4 " + ipv4);
}

if (reg.test(ipv6)) {
    alert("VALID IPV6 " + ipv6);
} else {
	alert("INVALID IPV6 " + ipv6);
}