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I'm a beginner to javascript. Now, I'm trying to make a form to post back to server. There are some "input" that contains ip address which should be validate before submitting. Now I have done a javascript function which work well. But now I'm trying to add this function into jquery selection. Just confuse how to do it.

This is my validate javascript code.

function ValidateIPaddress(Ipfield)  
    var ipformat = /^(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]?)$/;  

        return true;  
        return false;


and this is now how I implement for this validation.

<input type= "text" name= "LocalIP" style= "margin-right:10px " value="" class="ip" onfocusout="ValidateIPaddress(document.getElementById('LocalIp'))" id="LocalIp" >            Remote VIP Address :             
                <input type= "text" name= "RemoteVIPAddr" style= "margin-right:10px" value="" class="ip"  onfocusout="ValidateIPaddress(document.getElementById('RemoteIp'))" id="RemoteIp" >
                Remote VIP Port :             
                <input type= "text" name= "RemoteVIPPort" style= "margin-right:10px" value="5004" class="ip"  onfocusout="ValidatePort(document.getElementById('RemoteVIPPort'))" id="RemoteVIPPort">

Now I want to use jquery selection to always check if there are some invalid input. Which is something like this but with my own design function.

$("input.ip:visible").filter(function() { return this.ValidateIPaddress === true }).addClass("invalid");

Anyone has idea bout it?

You're not calling ValidateIPAddress in your filter function, you're just testing whether the DOM element has a non-empty property named ValidateIPAddress. It should be:

$("input.ip:visible").filter(function() {
    return ValidateIPAddress(this);

javascript regular expression to check for IP addresses, May be late but, someone could try: Example of VALID IP address Example of INVALID IP address Before we share with you how to validate IP address in javascript, you should know everything about IP address. What is IP address? An IP address, or simply an “IP,” is a unique address that identifies a device on the Internet or a local network. It allows a system to be recognized by other systems connected via the Internet protocol.

And if one needs to accept also CIDR format IP/{0-32} please update the 2 lines as below:

if (!ip.match(/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(\/([0-9]|[12][0-9]|3[0-2]))?$/)) {
return ip.split('/')[0].split('.').filter(octet => octet >= 0 && octet <= 255).length === 4;

JavaScript : IP address validation, Example of valid IP address. Example of invalid IP address. JavaScript code to validate an IP address function ValidateIPaddress(ipaddress) { if (/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.( Explanation of the said Regular expression (IP address) Note: Last two parts of the regular expression is similar to above. IP address validation. Every computer connected to the Internet is identified by a unique four-part string, known as its Internet Protocol (IP) address. An IP address consists of four numbers (each between 0 and 255) separated by periods.

Try this:

isIP(ip) {
  if (typeof(ip) !== 'string')
    return false;
  if (!ip.match(/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/)) {
    return false;
  return ip.split('.').filter(octect => octect >= 0 && octect <= 255).length === 4;


Javascript-Check IP Address using Regex, Free trial. 65+ Blazor Native Components – Try them free. Learn More. Javascript -Check IP Address using Regex� JavaScript Validation (IP Address) Verify the value of an IP address. Check for special cases such as and Cool!JavaScript Validation (IP Address) - Validation (IP Address) Your JavaScript is DISABLED. This site requires JavaScript for the best web experiments.

Regular expression for IP Address Validation, RegEx for ip address regex java,ip address regex c#,grep ip address regex,ip address regex python,ip address regex javascript,perl ip address regex,regex ip � Following solution will validate the entered IP address value including format & it's value also. It will accept min and max If invalid IP address entered then code will highlight the input control in pink color & clear the text otherwise will keep valid value as entered. Put the input tag on page:

Checking for valid IP addresses using JavaScript Regular Expressions, When we try this simple page, and enter the simplest of IP addresses, (i.e., "0.0. 0.0"), and press the Tab key to have the validate() function� Validate IP Address - LeetCode Write a function to check whether an input string is a valid IPv4 address or IPv6 address or neither. IPv4 addresses are canonically represented in dot-decimal notation, which consists of four decimal numbers, each ranging from 0 to 255, separated by dots ("."), e.g., ;

Code of IP Address validation in JavaScript – Example of form , In this tutorial, we will try to answer the following questions;. What is IP address? Examples of valid IP addresses; Examples of invalid IP addresses; Code example� Micah, there is no way possible to get an ip address with pure javascript. I suggest you do some reading on NAT and how that works. You need a server to echo your internet IP address back to you – Chad Grant Oct 17 '14 at 0:54

  • Write a validation function that returns true or false. Then you can use it in both the filter function and in ValidateIPAddress.
  • I updated my question statement
  • This is what I try but it seems not working.
  • this.ValidateIPAddress == true doesn't call the function.
  • And ValidateIPAddress is not a DOM method.