Example for on-tag-adding function

[vimal7370]

I can't seem to get the chaining correct.

A part of, or the whole code below I am using is incorrect. Is it possible for someone to share a simple working on-tag-adding function?

I am trying to post to a URL, and based on the response code, I want the tag to be added or removed from < tags-input >

        $http.post( ... ).then(function(res) {
          if (res.status == 204) {
            return $q.when(true);
          } else {
            return $q.reject(false);
          }
        }, function(err) {
          return $q.reject(false);
        }).then(function(a) { return $q.reject(a); });

Thank you!