JS Regex url validation

Question

I tried to validate url with or without http No matter what i did the function return false. I checked my regex string in this site: http://regexr.com/ And its seen as i expect.

Answer 1

I change the function to Match + make a change here with the slashes and its work: (http(s)?://.)

The fixed function:

function isUrlValid(userInput) {
    var res = userInput.match(/(http(s)?:\/\/.)?(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)/g);
    if(res == null)
        return false;
    else
        return true;
}