FormData file uploads

XMLHttpRequest Level 2 FormData is super. Loving it.

var fd = new FormData();
fd.append("key", "value");
var files = dropEvent.dataTransfer.files;
for (var i=0; i<files.length; i++)
  fd.append("file", files[i]);

var xhr = new XMLHttpRequest();
xhr.open("POST", "/upload");
xhr.send(fd);