ajax - jQuery: weird behavior - XHTTPResponses vs promises/wrappers -

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having code:

(function($) {      $(function(){         $("div.cotizador ul > li > a.cotizador").click(function(){             var data = {                 concesionaria: $(this).data("concesionaria"),                 modelo: $(this).data("modelo")             };              var promise = $.get("ir-a-concesionaria", data, function(data){                 if ("success" in data) {                     window.location.href = data.success.redirect;                 } else {                     alert("no se puede seleccionar el modelo especificado. consulte con el administrador del sitio.");                 }             }, "application/json");             console.log(data);             console.log(promise);             promise.fail(function(xhr, errortype, errordescription){                 alert("ocurrió un error interno. intente nuevamente más tarde");             });         });     });  })(jquery);

(currently doesn't matter html triggers callback).

when instruction console.log(promise) reached, google chrome shows in console debug message:

xmlhttprequest {statustext: "", status: 0, response: "", responsetype: "", responsexml: null…}

this means: returned result $.get not promise-wrapped xhttp (and so, .fail method not exist).

meanwhile, debugging data object gives {modelo:"xxx", concesionaria:"yyy"} assuming "xxx" , "yyy" have well-defined , expected values (this means: data defined , has no errors when error i'm talking triggered).

however when copy-paste code console, , replace data argument literal object, e.g.:

jquery.get("ir-a-concesionaria", {modelo:'toyota-gt86', concesionaria:'casabaca'}, function(data){     if ("success" in data) {         window.location.href = data.success.redirect;     } else {         alert("no se puede seleccionar el modelo especificado. consulte con el administrador del sitio.");     } }, "application/json");

the returned object (as seen in google chrome's console) promise-wrapped object (as told in documentation).

question: why happening?

(even when non-helpful: i'm using drupal 7)

found answer (drupal sucks):

first, 1.4.4 version of jquery loaded. then, function called. finally, 1.10.1 version of jquery loaded. after that, repeated test case and, of course, worked -.-''.


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