Sometimes we need to make AJAX call in our Web page. The purpose of AJAX call is that you want to get/submit data without refreshing your page or you want to submit your form by calling an API. We can do this very easily by using ajax() method of jQuery.

Example: In the below code I'm making an AJAX call to login a user

//Ajax login user at launch
    function ajaxLoginWebUser()
    {
    	 $.ajax({
    			url: 'loginWebUser', //Here you will pass the API url you want to call
    			type : 'get',
    			async : true,
    			cache: false,
    			data : {
    				userEmail : userEmail
    			},
           beforeSubmit: function() { },
           success: function(response) {
        	   if(response.status == 'OK')
       		   {
        		   alert("success...";
       		   }
        	   else
        	   {
        		   alert("FAILED, Try again ... "+response.message);
        	   }
    	   },
    			error : function() { alert("FAILED, Try again ... " + "System error occured, please try again ...");}
         
       });
    }

Hope this will help you :)