I have a simple URL validator. The url validator works as probably every other validator.

Now I want, if the URL passed, take the https://, http:// and remove it for var b.

So what I've done is I made a another Regex which captures https://, http://, ftp:// etc and say if the url passed the long test, get the second test and replace it with empty string.

Here is what I came up with:

$(button).on('click', function () {

   var url = $('#in').val();



   var match = /^([a-z][a-z0-9*-.]*)://(?:(?:(?:[w.-+!$&'()*+,;=]|%[0-9a-f]{2})+:)*(?:[w.-+%!$&'()*+,;=]|%[0-9a-f]{2})+@)?(?:(?:[a-z0-9-.]|%[0-9a-f]{2})+|(?:[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})]))(?::[0-9]+)?(?:[/|?](?:[w#!:.?+=&@!$'~*,;/()[]-]|%[0-9a-f]{2})*)?$/;

   var protomatch = /^(https?|ftp)://(.*)/;





   if (match.test(url)) { // IF VALID

      console.log(url + ' is valid');



      // if valid replace http, https, ftp etc with empty

      var b = url.replace(protomatch.test(url), '');

      console.log(b)



   } else { // IF INVALID

      console.log('not valid')

   }



});

Why this doesn't work?