Parse XHR data

Question

Hi, i was wondering if there were any good resources people knew of that help with writing the WinJS.xhr functions. I have mine working to a point. I'm able to POST and GET data from my MySQL database. I don't know how to parse the data. 

With this code:

WinJS.xhr({
                url: "http://url",
                type: "get",
                headers: { "Content-type": "application/x-www-form-urlencoded" },
            })
                .done(function complete(result) {
                    xhrDiv5.innerText = JSON.stringify(result.response); 

I get this:

"{\"Id\":1,\"Name\":\"Tomato Soup\",\"Category\":\"Groceries\",\"Price\":1.39}"

I want to be able to parse through the data, but don't know how. 

Thanks!