refactored isIP method

utils/isIP.js

@@ -3,25 +3,8 @@
 // Parses a string, and returns true if it is an IP Address.
 
 function isIP(str) {
-	const segments = str
-		.split(".")
-		.map(Number);
-	if (!segments.length === 4) {
-		return false;
-	}
-	for(let i = 0; i < segments.length; i++) {
-		const segment = segments[i];
-		if (Number.isNaN(segment)) {
-			return false;
-		}
-		if (segment < 1 || segment > 255) {
-			return false;
-		}
-	}
-	if (segments[3] > 254) {
-		return false;
-	}
-	return true;
+	const IPv4 = /^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/
+	return IPv4.test(str);
 }
 
 module.exports = isIP;