Ajax Request Response

AJAX (Asynchronous Javascript and XML)

This is a client side script that use to get and pass data from and to the server or database without completely refreshing or without any post back. Mainly use to update a web page partially.

simple ajax request/response

$.ajax({

type:'GET', //this specifies the type of the request. ex:- GET , POST

url:'getDataFromThisURL.php', //this specifies the url which should be redirect when the ajax                                                                 //response executes

data:{key:value}, //this is optional. if we have to pass any data(ex:-form data) then we should pass                                  //that data like this. in here KEY is the variable which will pass with the request                                    //and the VALUE is 
                             //the value we want to assign to that KEY variable and pass with the request

success:function(responseData){ //success - this is the block where ajax caught the positive response.
                                                     //(if there is no errors)
//manipulate the response data
},

error:function(xhr,status,error){
//this is where ajax caught any errors occur while the ajax request executes
}

});