Why do we pass null to XMLHttpRequest.send?
If you’ll take a look at an old specification of XMLHttpRequest, it seems like as though the W3C did not require that the parameter be optional at one point, which may have led to people supplying an explicit null value ‘just in case’. (search for ‘SHOULD support the send’) http://web.archive.org/web/20060409155734/http://www.w3.org/TR/XMLHttpRequest/ Another plausible reason I’ve come … Read more