From 00fc6b1b1a9ebd5ded5b0ff333949575995824a5 Mon Sep 17 00:00:00 2001
From: LongYinan <lynweklm@gmail.com>
Date: Tue, 11 Oct 2016 20:43:08 +0800
Subject: [PATCH] fix(Observable/Ajax): mount properties to origin
 readystatechange function

---
 src/observable/dom/AjaxObservable.ts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/observable/dom/AjaxObservable.ts b/src/observable/dom/AjaxObservable.ts
index 506589ed1dc..f279bddd8dc 100644
--- a/src/observable/dom/AjaxObservable.ts
+++ b/src/observable/dom/AjaxObservable.ts
@@ -325,7 +325,7 @@ export class AjaxSubscriber<T> extends Subscriber<Event> {
       (<any>xhr.onerror).progressSubscriber = progressSubscriber;
     }
 
-    xhr.onreadystatechange = function xhrReadyStateChange(e) {
+    function xhrReadyStateChange(e: ProgressEvent) {
       const { subscriber, progressSubscriber, request } = (<any>xhrReadyStateChange);
       if (this.readyState === 4) {
         // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
@@ -354,9 +354,10 @@ export class AjaxSubscriber<T> extends Subscriber<Event> {
         }
       }
     };
-    (<any>xhr.onreadystatechange).subscriber = this;
-    (<any>xhr.onreadystatechange).progressSubscriber = progressSubscriber;
-    (<any>xhr.onreadystatechange).request = request;
+    xhr.onreadystatechange = xhrReadyStateChange;
+    (<any>xhrReadyStateChange).subscriber = this;
+    (<any>xhrReadyStateChange).progressSubscriber = progressSubscriber;
+    (<any>xhrReadyStateChange).request = request;
   }
 
   unsubscribe() {