确实有办法。使用普通的旧xmlhttpobjects我监视了readyState。就绪状态4表示请求已结束。就绪状态3表示我可以获得一些输出并等待更多:
request.onreadystatechange=function(){ switch(request.readyState) { case 4: console.log("all good things come to an end"); break; case 3: console.log("o, hai!" + request.responseText); break; }}


