All I have is a fb url for fb login for my webapp. I need to load the url, check if the url has some keywords and Authenticate the user. The problem is when I try to load the url in the browser, I coundn't check the url since it goes out of the project and fb does not support iframe also. How can I load the url and check for the change?

I have tried the following code:

  $scope.FbLogin = function ()
       {
           var i = 0;
           window.location.replace("fburl");
           while (i == 0)
           {
               var fburl = window.location.href;
               if (fburl.includes('&email'))
               {
                  //my logic
               }
           }

At window.location.replace("fburl"), I lose the control over the project which is obvious. Iframe cant be used....Any other ways?