simple promise-based ajax function for get and post

pget.js

//a promise-based ajax io
function pGet(url, data) {
  return new Promise(function(y, n) {
	var e = new XMLHttpRequest();
	e.responseType="document";
	e.onload=x=>y(e.response);
	if(n) e.onerror=x=>n(e);
	e.open(data?"POST":"GET", url, true);
	setTimeout(e.send.bind(e,data), 0);
  });
}