javascript - Safari and IE ajax issues with subsequent calls (.then) -

i've got code:

var request1 = this.add(prod_id, pack_id_combination, button, pack_qty).then(function(rdata1){   // works   this.add(prod_id, case_id_combination, button, case_qty).then(function(rdata2){         // (random) doesn't work   }.bind(this), function(req, status, error){ console.log('case error',req, status, error); }); }.bind(this), function(){ console.log('pack error'); }); 

i omitted rest of code because it's huge class , it's impossible build jsfiddle, things.

but here's facts:

• my js points php file returning data. ajax calls via add() function (see below)

• it works first call, doesn't work second call.

• on log, status = 'error', error = '' (empty, no info here)

• i know sure second add(), if called alone same params, work.

• furthermore, has these problems in safari , ie, not in chrome, ff, android

• furthermore, has these problems if tested online, while in local environment works properly.

• safari says looses connection. information can get

the add() function quite trivial:

add:function(idproduct, idcombination, callerelement, quantity){     return $.ajax({         type: 'post'         ,headers: { "cache-control": "no-cache" }         ,url: baseuri + '?rand=' + new date().gettime()         ,cache: false         ,datatype : "json"         ,data: 'controller=cart&add=1&ajax=true&qty=' + ((quantity && quantity != null) ? quantity : '1') + '&id_product=' + idproduct + '&token=' + static_token + ( (parseint(idcombination) && idcombination != null) ? '&ipa=' + parseint(idcombination): '')         ,success:function(data, status, req){             console.log('ok');         }         ,error:function(jqxhr, textstatus, errorthrown){             console.log(jqxhr.responsetext, textstatus, errorthrown);         }     }); },//end add() 

so, question: there way avoid problem? common pitfall? there common practices avoid kind of issues?

ok, issue solved using get request instead of post one.

probably both safari , ie not able correctly manage 2 subsequent ajax post requests, @ least in specific circumstances. or, jquery 2.1.3 (version used here) implementation has kind of subtle problems/bugs.

but since have random css/js issues both ie (surprise...) , safari (yes...), guess it's them , not jquery.