Function onReadyStateChange

tests/eventsource.js:329–344

(event)

      }
    };
    var onReadyStateChange = function (event) {
      if (xhr != undefined) { // Opera 12
        if (xhr.readyState === 4) {
          if (!("onload" in xhr) || !("onerror" in xhr) || !("onabort" in xhr)) {
            onFinish(xhr.responseText === "" ? "error" : "load", event);
          }
        } else if (xhr.readyState === 3) {
          if (!("onprogress" in xhr)) { // testing XMLHttpRequest#responseText too many times is too slow in IE 11
            // and in Firefox 3.6
            onProgress();
          }
        } else if (xhr.readyState === 2) {
          onStart();
        }
      }
    };
    var onTimeout = function () {
      timeout = setTimeout(function () {
        onTimeout();