Simple closure for cross browser XHR instance

Submitted by hemanth on Mon, 11/14/2011 - 14:53

Yes that is right, there are many libraries to handle XHR, but raw JS is always fun!

There are many ways of doing this, but here is a unique way of getting an XHR instance.

A simple closure, that tries to create a simple XHR instance :

var req = (function () {
    try {
        return new(this.XMLHttpRequest || ActiveXObject)('MSXML2.XMLHTTP.3.0')
    } catch (e) {}
})();

The 'req' var dump on V8 would be like :

{
readyState ":0,"
onloadstart ":null,"
withCredentials ":false,"
onerror ":null,"
onabort ":null,"
status ":0,"
responseXML ":null,"
onload ":null,"
onprogress ":null,"
upload ":{"
onloadstart ":null,"
onabort ":null,"
onerror ":null,"
onload ":null,"
onprogress ":null},"
statusText ":"","
responseText ":"","
UNSENT ":0,"
OPENED ":1,"
HEADERS_RECEIVED ":2,"
LOADING ":3,"
DONE ":4
}

So, thus a silly script was made just for the LOLz of it! Do suggest your way ;)

Share this