Javascript document.referrer with full querystring

I am trying to get the full referring url to a page via javascript.

So far the closet I have come is

var lastUrl = document.referrer;

This does not include the query attached to the url.

var lastUrl = document.URL;

returns the current URL with the querystring intact.

Is there anyway of easily obtaining the referring url along with the referring query.

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Link to original article：https://stackoverflow.com/questions/23682718/javascript-document-referrer-with-full-querystring