javascript - How can I repopulate the jquery UI datepicker from an Ajax response -

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i've been using this question guide associating events jquery ui datepicker.

i have dates , events highlighting current month works fine. question how can refresh calendar new events ( new set of social events on calendar stored in spektrixapp.events) based on further ajax call (see onchangemonthyear in code below)

spektrixapp = {};  (function($) {      $.post(         // see tip #1 how declare global javascript variables         spektrixajax.ajaxurl,         {             // here declare parameters send along request             // means following action hooks fired:             // wp_ajax_nopriv_spektrix_get_events , wp_ajax_spektrix_get_events             action : 'spektrix_get_events',              // other parameters can added along "action"             monthid : 9         },         function( response ) {             spektrixapp.events = response;             //console.log(events[1]);             $("#spektrix-event-calendar" ).datepicker({                  beforeshowday: function(date) {                      var result = [true, '', null];                     var matching = $.grep(spektrixapp.events, function(event) {                         //console.log(new date(event.date).valueof() );                         datetohighlight = new date(event.date).valueof();                         return datetohighlight === date.valueof();                     });                      if (matching.length) {                         result = [true, 'highlight', null];                     }                      return result;                 },                  onselect: function(datetext) {                      $('#spektrix-dialog').empty(); //empty target div                     var date,                         selecteddate = new date(datetext),                         = 0,                         event = null;                         daysevents = [];                      /* determine if user clicked event: */                     while (i < events.length && !event) {                         //console.log(events[i].date);                         date = new date(spektrixapp.events[i].date);                          if (selecteddate.valueof() === date.valueof()) {                             event = spektrixapp.events[i];                             daysevents.push(event);                         }                         i++;                     }                     if (daysevents) {                        for(i = 0; < daysevents.length; i++) {                         /* if event defined, perform action here; show tooltip, navigate url, etc. */                         var day = new date(event.date).getdate().tostring();                         $('#spektrix-dialog').append('<div><a href="/whats-on/'+slugify(event.title)+'">'+event.title+'</a></div>');                      }                      }                 },                  onchangemonthyear: function(year, month,instance) {                     jquery.post(                         // see tip #1 how declare global javascript variables                         spektrixajax.ajaxurl,                         {                             // here declare parameters send along request                             // means following action hooks fired:                             // wp_ajax_nopriv_spektrix_get_events , wp_ajax_spektrix_get_events                             action : 'spektrix_get_events',                              // other parameters can added along "action"                             monthid : month                         },                         function( response ) {                             spektrixapp.events = response;                             $("#spektrix-event-calendar" ).datepicker("refresh");                          }                     );                 }              });              //console.log(events);         }     );    })(jquery);  function slugify(input) {     return input.replace(/\s+/g, '-').tolowercase(); }

your code not work reason of using ajax request in onchangemonthyear event handler. beforeshowday called before spektrixapp.events change in onchangemonthyear. solve problem can change jquery.post jquery.ajax , add option 

async : false

to ajax request declaration in onchangemonthyear event handler.

please see example jsfiddle


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