Getting Serverside data on handling event

[jeena binex]

Below is a snippet of my Client Side Code in Java script

 google.visualization.events.addListener(chart, 'select', selectHandler);

function selectHandler(e) {

             alert('A chart was selected');

           

       // Want to call server side data here , how do I do ?

}

[SJW]

Ajax:

 var postData = [];

 postData.push({name: 'key', value: '200'});

 $.ajax({
   url: "get-data.php",
   method: "POST",
   data: postData,
   dataType: "json",
   async: false,
   success: function (response) {
      data = response;    
   },
   error: function(xhr, status, error){
      do something;
   }
 });