javascript - jQuery post data showing in console.log but triggering 'Uncaught TypeError: object is not a function' with alert() -


i'm stuck here. i'm trying do ajax post add event fullcalendar (which might irrelevant). i'm returning integer php json_encode , trying check value in post success function. value shows correctly in console when try alert it gives error: uncaught typeerror: object not function

here's code:

                $('[data-form=shtotakim]').submit(function(e){                 e.preventdefault();                  $.fn.spin.presets.ss = {                     lines: 9, // number of lines draw                     length: 5, // length of each line                     width: 2, // line thickness                     radius: 3, // radius of inner circle                     corners: 1, // corner roundness (0..1)                     rotate: 0, // rotation offset                     direction: 1, // 1: clockwise, -1: counterclockwise                     color: '#fff', // #rgb or #rrggbb or array of colors                     speed: 1.3, // rounds per second                     trail: 53, // afterglow percentage                     shadow: false, // whether render shadow                     hwaccel: false, // whether use hardware acceleration                     classname: 'spinner', // css class assign spinner                     zindex: 2e9, // z-index (defaults 2000000000)                     top: 'auto', // top position relative parent in px                     left: '34px' // left position relative parent in px                 };                  var = $(this).find('button');                  but.text('').prop('disabled', true).attr('style', 'height: 30px;');                 $('[data-type=spinner]').spin('ss');                  var url = $(this).attr('action');                 var data = $(this).serialize() + '&date=' + $('[data-type=date]').html();                  // var title = "title";                 $.post(url, data, function(data){                     $('[data-type=spinner]').spin(false);                     but.text('aggiungi').prop('disabled', false).removeattr('style');                      // checking part                     console.log(data);                     alert(data);                     if(data == 4)                     {                         alert('hello world');                     }                      $('#calendar').fullcalendar('refetchevents');                     ev = new object();                 }, 'json');             });


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