ajax convert to js

1var person={"first_name":"Tony","last_name":"Hawk","age":31};
2var personJSONString=JSON.stringify(person); 

1$("#ajaxForm").submit(function(e){
2  e.preventDefault();
3  var action = $(this).attr("action");
4  var data = {};
5  $(this).serializeArray().map(function(x){data[x.name] = x.value;}); 
6  $.ajax({
7    type: "POST",
8    url: action,
9    data: JSON.stringify(data),
10    contentType: "application/json",
11    headers: {
12      "Accept": "application/json"
13    }
14  }).done(function() {
15     $('.success').addClass('is-active');
16  }).fail(function() {
17     alert('An error occurred please try again later.')
18  });
19});