feature: vor und nachteile

praesentation/node_modules/is-ip/index.js

@@ -0,0 +1,43 @@
+import ipRegex from 'ip-regex';
+import {isMatch} from 'super-regex';
+
+const maxIPv4Length = 15;
+const maxIPv6Length = 45;
+
+const options = {
+	timeout: 400,
+};
+
+export function isIP(string) {
+	if (string.length > maxIPv6Length) {
+		return false;
+	}
+
+	return isMatch(ipRegex({exact: true}), string, options);
+}
+
+export function isIPv6(string) {
+	if (string.length > maxIPv6Length) {
+		return false;
+	}
+
+	return isMatch(ipRegex.v6({exact: true}), string, options);
+}
+
+export function isIPv4(string) {
+	if (string.length > maxIPv4Length) {
+		return false;
+	}
+
+	return isMatch(ipRegex.v4({exact: true}), string, options);
+}
+
+export function ipVersion(string) {
+	if (isIPv6(string)) {
+		return 6;
+	}
+
+	if (isIPv4(string)) {
+		return 4;
+	}
+}