Return serialized form without null-value fields

script.js

// Удаление null-полей из модели
var cleanedForm = function(form) {
    "use strict";
    var thisArray = $("#" + form).serializeArray();
    
    $.each(thisArray, function(index, item) {
        if (item.value.toString().toLowerCase() == "null") {
            delete thisArray[index];
        }
    });

    return thisArray;
};