ajax Getting started with ajax Sync - Async ajax requests

Example

Asynchronous ajax call

With this type of ajax call, code does not wait for the call to complete.

$('form.ajaxSubmit').on('submit',function(){
    // initilization...
    var form   = $(this);
    var formUrl    = form.attr('action');
    var formType   = form.attr('method');
    var formData   = form.serialize();
    
    $.ajax({
        url: formUrl,
        type: formType,
        data: formData,
        async: true,
        success: function(data) {
            // .....
        }
    });
    //// code flows through without waiting for the call to complete
    return false;
});

Synchronous ajax call

With this type of ajax call, code waits for the call to complete.

$('form.ajaxSubmit').on('submit',function(){
    // initilization...
    var form   = $(this);
    var formUrl    = form.attr('action');
    var formType   = form.attr('method');
    var formData   = form.serialize();
    var data = $.ajax({
            url: formUrl,
            type: formType,
            data: formData,
            async: false
        }).responseText;
    //// waits for call to complete
    return false;
});