javascript - Can I "rename" the methods 'then' and 'catch' when I'm returning a promise?

Question

I would like to change the name and write "exito" (success in spanish) instead of .then() and "error" instead of catch().

Here is my code.

How can I manage with this?

var url = 'http://devmsadasds'; var object = null;

            var dataServicio = new dataService(url, object, $scope, $routeParams, $controller, $timeout, $http, $q);
                dataServicio.ajaxPeticion(url, object, $scope, $routeParams, $controller, $timeout, $http, $q)
                 .then( function(response){
                     $scope.datosVista = response;
                 })
                 .catch( function(err){
                     alert(err);
                 });

            }


          function dataService(url, object, $scope, $routeParams, $controller, $timeout, $http, $q) {
                return {
                        ajaxPeticion : ajaxPeticion
                    }

                function ajaxPeticion(url, object, $scope, $routeParams, $controller, $timeout, $http, $q) {
                    if(object === null || object === undefined) {
                        var metodo = 'GET';
                }
                else {
                        var metodo = 'POST';
                }

                    var deferred = $q.defer();
                    var promise = deferred.promise;

                    $http({
                            method: metodo,
                            url: url,
                            data: object,
                            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
                    })
                    .then(function(response) {
                        if(response.data.jsonMC.resultado === false || response.status != 200 || response.data.jsonMC.respuesta === null) {
                            deferred.reject(response.data.jsonMC.error);
                        }
                        else {
                            deferred.resolve(response.data.jsonMC.respuesta);
                        }
                    }, function errorCallback(response) {
                        deferred.rejected(response.data.jsonMC.error);
                    });

                    return promise;
                }

            }

Answer 1

You could, but to be honest I cannot really see the utility. You are going to create a way that all the developers (or you) will get used to a method which actually doesn't exist, your code will never be understood from outside people who don't know about this "convention". At the same moment, every library of whatever uses "normal promises", will use the then and not your method.

By the way, this should simply do what you want for simple JavaScript, you can do the same for AngularJS with the $q service:

Promise.prototype.exito = Promise.prototype.then;

Promise.prototype.exito = Promise.prototype.then;
new Promise((resolve, reject) => {
  setTimeout(function() {console.log('finished'); resolve('resolved');}, 2500);
}).exito(function(data){ console.log(data); });