How to Execute the function after Ajax call is complete

Question

I have two functions,in 1st function having ajax call,so i want the 2nd function to be execute after ajax call (here i am reloading the page)complete,can you please help me?
Here the below code

<div id="exapnd_or_collapse_div" class="exapnd_or_collapse_div" onclick="changeLayout();">
<script>
function changeLayout () {
    alert('change layout');

    try {
        jQuery.ajax({
            url:'<%=resourceURL.toString()%>',
            dataType: "text",
            data:{
                <portlet:namespace  />cmd:'changeLayout'
            },
            error: function(){
             alert("AJAXError");
            },
            type: "post",

            success: function(data) {

                if("success" == data) {

                    location.reload();
                }
            }
        }).done(function(){
            exapndCollapse(); 
          });


    } catch(e) {
        alert('waiting: ' + e);
    }
};

function expandCollapse() {


            jQuery("div.Search_Styled-dropDown").css("display", "none");
            jQuery("span.menu-text").css("display", "none");

            jQuery("ul.Common_ul").css("display", "none");
            jQuery("img.module_images").css("width", "25px");
            jQuery("img.module_images").css("margin-top", "20px");
        jQuery("img.module_images").css("height", "21px");
            jQuery("#search_box").css("display", "none");   
        jQuery("#Escaped_toggle").css("margin-right", "94%");   
        }
</script>

Answer 1

As you know Ajax is to make Asynchronous request. It means client no need to wait till you get the response from server. So during this Ajax object goes different states ( ie from 0 to 4 ). Those are:

• 0: request not initialized
• 1: server connection established
• 2: request received
• 3: processing request
• 4: request finished and response is ready

So as per your requirement there is two solution:

• either you make synchronous request (but it is not recommended)
• you need to call your 2nd function when readystate value is 4

Refer below code, it will help you:

function changeLayout() {
    try{
        jQuery.ajax({
            url:'<%=resourceURL.toString()%>',
            dataType: "text",
            data:{
                <portlet:namespace  />cmd:'changeLayout'
            },
            type: "post",

            beforeSend: function(){
                //before send this method will be called
            },
            success: function(data) {
                //when response recieved then this method will be called.
            }
            complete: function(){
                //after completed request then this method will be called.
            },
            error: function(){
                //when error occurs then this method will be called.
            }
        });
    }catch (e) {
        alert(e);
    }
}

Hope this will help you :)

Answer 2

Try this but i have created example change the code as per your requirement

function exapndCollapse(){

    //execute your script here
    //if u want reload the page means write your script here

}

function changeLayout () {
var myval = 'test';
    $.ajax({
          url:'script.php',
          type: "POST",
          data: {"myval":myval},
          success: function(data){
              //call the after ajax success 
              exapndCollapse(); //whatever the function call 
          },error: function() { 
              console.log("error");
          } // This is always fired
   });   
};