Javascript没有办法获取对象的副本？

Question

所以我有一个对象

var ajaxOptions = {
            url: ajaxurl,
            type: 'POST',
            async: false,
            success: function (retval) {
                if (!JSON.parse(retval))
                { 
                    alert("Error occurred.");
                }
                else
                {
                    jQuery('#member-modal').modal('hide');
                    location.reload();
                }
            },
            cache: false,
            contentType: false,
            processData: false
        };

我想在我的几段代码中重用，比如

var theseOptions = ajaxOptions; 
theseOptions.data = new FormData($('#thisform')[0]); 
$.ajax(theseOptions);
// ... somewhere else in code ... 
var thoseOptions = ajaxOptions; 
thoseOptions.data = new FormData($('#thatform')[0]);
thoseOptions.someOtherOption = "hehehe";
$.ajax(thoseOptions);
// ... somewhere else in code ...
var poopOptions = ajaxOptions; 
poopOptions.data = new FormData($('#poopform')[0]);
$.ajax(poopOptions);  

问题是，据我所知，我的var实际上是对现有ajaxOptions的引用，例如，当我运行

时

$.ajax(poopOptions);

键值对someOtherOptions : "hehehe"仍然存在。实际上我必须做类似

的事情

var theseOptions = ajaxOptions; 
theseOptions.data = new FormData($('#thisform')[0]);
$.ajax(theseOptions);  
delete thoseOptions.data; // now ajaxOptions is back to what it originally was
// ... somewhere else in code ... 
var thoseOptions = ajaxOptions; 
theseOptions.data = new FormData($('#thatform')[0]);
theseOptions.someOtherOption = "hehehe";
$.ajax(thoseOptions); 
delete thoseOptions.data; delete thoseOptions.someOtherOption; // // now ajaxOptions is back to what it originally was
// ... somewhere else in code ...
var poopOptions = ajaxOptions; 
poopOptions.data = new FormData($('#poopform')[0]);
$.ajax(poopOptions);  
delete poopOptions.data; // now ajaxOptions is back to what it originally was

或者我可能需要做类似

的事情

function getAjaxBaseOptions ( ) 
{
    return {
                url: ajaxurl,
                type: 'POST',
                async: false,
                success: function (retval) {
                    if (!JSON.parse(retval))
                    { 
                        alert("Error occurred.");
                    }
                    else
                    {
                        jQuery('#member-modal').modal('hide');
                        location.reload();
                    }
                },
                cache: false,
                contentType: false,
                processData: false
            };

}

var theseOptions = getAjaxBaseOptions(); 
theseOptions.data = new FormData($('#thisform')[0]); 
$.ajax(theseOptions);
// ... somewhere else in code ... 
var thoseOptions = getAjaxBaseOptions(); 
thoseOptions.data = new FormData($('#thatform')[0]);
thoseOptions.someOtherOption = "hehehe";
$.ajax(thoseOptions);
// ... somewhere else in code ...
var poopOptions = getAjaxBaseOptions(); 
poopOptions.data = new FormData($('#poopform')[0]);
$.ajax(poopOptions); 

这看起来有点荒谬。在Javascript中真的没有直接复制对象的原生方式吗？ WTF？