angularjspromisetest.ts

$httpProvider.interceptors.push(function($q, dependency1, dependency2) {
  return {
   'requestError': function(rejection) {
      var deferred = $q.defer();
      var promise = deferred.promise;
      return promise.reject().finally((reason) => {
        if(promise["$$state"].pending.length == 0)
        {
          alert(rejection);
        }
      }));
    },
  };
});

OR

$httpProvider.interceptors.push(function($q, dependency1, dependency2) {
  return {
   'requestError': function(rejection) {
      var deferred = $q.defer();
      var promise = deferred.promise;
      return promise.reject().catch((reason) => {
        if(deffered.CatchListener.Any())
        {
          alert(reason);
        }
      }));
    },
  };
  
  OR
  
  $httpProvider.interceptors.push(function($q, dependency1, dependency2) {
  return {
   'requestError': function(rejection) {
      var deferred = $q.defer();
      var promise = deferred.promise;
      return promise.reject().finally((reason) => {
        if(deffered.IsResolved)
        {
          alert(rejection);
        }
      }));
    },
  };
});