ipValidation.js

//IP Validation

//https://www.codewars.com/kata/515decfd9dcfc23bb6000006/javascript

//Write an algorithm that will identify valid IPv4 addresses in dot-decimal format. IPs should be considered valid if they consist of four octets, with values between 0 and 255, inclusive.

// Valid inputs examples:
// Examples of valid inputs:
// 1.2.3.4
// 123.45.67.89
// Invalid input examples:
// 1.2.3
// 1.2.3.4.5
// 123.456.78.90
// 123.045.067.089
// Notes:
// Leading zeros (e.g. 01.02.03.04) are considered invalid
// Inputs are guaranteed to be a single string

function isValidIP(str) {
    const validIPRegex = /^((25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)\.){3}(25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)$/
  
    return validIPRegex.test(str)
  }