Unpack the gzip via JavaScript

Question

I load csv.gz

var XHR = ("onload" in new XMLHttpRequest()) ? XMLHttpRequest : XDomainRequest;
var xhr = new XHR();

xhr.open("GET", "addres/file.csv.gz", true);
xhr.send(null);

xhr.onload = function() {
  console.log( this.responseText );<----

}
xhr.onerror = function() {
  alert( "Error " + this.status );
}

Can I unzip this archive into memory on the client(JS) for further parsing? How to do it? Help me, please.

It does not work as indicated in the responses. Do not unpack.