Difference between $.ajax(); and $.ajaxSetup();

Question

What is the difference between $.ajax(); and $.ajaxSetup(); in jQuery as in:

$.ajax({
    cache:false
});

and

Answer 1

The following will prevent all future AJAX requests from being cached, regardless of which jQuery method you use ($.get, $.ajax, etc.)

$(document).ready(function() {
  $.ajaxSetup({ cache: false });
});

you should use $.ajax, which will allow you to turn caching off for that instance:

$.ajax({url: "myurl", success: myCallback, cache: false});