Question

How to validate IP address in JavaScript

Answer 1

function checkIPAddress(ip)  {
  let regex = /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;
  if (ip.match(regex)) {
     console.log("Ok");
     return true;
  }
  else {
    console.log("Error");
    return false;
  }
}

checkIPAddress("240.135.156.123")


/*
run:

Ok

*/

 

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