javascript - Js variable does not update in ajax -


i use jstree , want reload new data cannot send new data.

var $driver = 0;  $(document).ready(function () {     $('#tree_folder').jstree({         'core': {             'check_callback': true,             "themes": {                 "responsive": false             },             'data': {                 type: "post",                 url: "doc.aspx/folder",                 data: function () { return '{"driver":"' + $driver + '"}' },                 contenttype: "application/json"             }         }     }); });           $(document).on('click', '.tile', function () {     var $item = $(this);         var $driver = $item.attr('data-driver');         //  alert($driver);         $('#tree_folder').jstree('refresh'); });

i got new value when clicked, send old default data every time. above in alert function, can give me right value although json post send default 1 data written function

function () { return '{"driver":"' + $driver + '"}' }

how can new value variable?

remove var before $driver .tile click function created global previously,

try this,

$(document).on('click', '.tile', function () {     var $item = $(this);         $driver = $item.attr('data-driver');   // remove var line     //  alert($driver);         $('#tree_folder').jstree('refresh'); });

also use cache:false in jstree like,

function getdriver() {     return '{"driver":"' + $driver+ '"}'; }  $(document).ready(function () {     $('#tree_folder').jstree({         'core': {             'check_callback': true,             "themes": {                 "responsive": false             },             cache: false, // cache false             'data': {                 type: "post",                 url: "doc.aspx/folder",                 data: getdriver(), // updated driver                 contenttype: "application/json"             }         }     }); });

also take on change ajax options in jstree server


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