What are the various ajax functions available in Jquery ?

Ajax allows the user to exchange data with a server and update parts of a page without reloading the entire page. Some of the functions of ajax are as follows:

$.ajax(): This is considered to be the most low level and basic of functions. It is used to send requests . This function can be performed without a selector.

$.ajaxSetup(): This function is used to define and set the options for various ajax calls.

For example.

$.ajaxSetup({
"type":"POST",
"url":"ajax.php",
"success":function(data){
$("#bar")
.css("background","yellow")
.html(data);
}
});

Shorthand ajax methods: They comprise of simply the wrapper function that call $.ajax() with certain parameters already set.

$.getJSON(): this is a special type of shorthand function which is used to accept the url to which the requests are sent. Also optional data and optional callback functions are possible in such functions.