Vanilla AJAX

ajax.js

//Vanilla JS
var r = new XMLHttpRequest();
r.open("POST", "/path/to/php", true);
r.onreadystatechange = function () {
  if (r.readyState != 4 || r.status != 200) return;
	console.log("Success: " + r.responseText);
};
r.send("banana=yellow");

//jQuery
$.ajax( {
    type: 'POST',
    url: '/analytics/goods_feed/?addGoods=1',
    data: 'action=3&type=4',
    beforeSend: function() {
        $('#platforms').addClass('wait');
    }
})
    .done(function(data) {
        console.log(data);
    })
    .fail(function(data) {
        console.log(data);
    })
    .always(function() {
        console.log(data);
    });