JS Validation IP:Port

Question

I have a question, on how to validate IP:Port together. example:

192.158.2.10:80 <--Valid

192.158.2.10 <---Invalid

So the port is a must, I fo

Answer 1

A regular expression would have to be ridiculously long in order to validate that the numbers fall within the acceptable range. Instead, I'd use this:

function validateIpAndPort(input) {
    var parts = input.split(":");
    var ip = parts[0].split(".");
    var port = parts[1];
    return validateNum(port, 1, 65535) &&
        ip.length == 4 &&
        ip.every(function (segment) {
            return validateNum(segment, 0, 255);
        });
}

function validateNum(input, min, max) {
    var num = +input;
    return num >= min && num <= max && input === num.toString();
}

Demo jsfiddle.net/eH2e5