From 2d165e1ecd3b32581a0b31f6eba9c42425f738df Mon Sep 17 00:00:00 2001
From: Max Lynch <max@drifty.com>
Date: Wed, 26 Oct 2016 21:13:06 -0500
Subject: [PATCH] fix(scroll): fix scroll to top on iOS

---
 src/util/events.ts | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/util/events.ts b/src/util/events.ts
index 72f5f06bf9..5c01fa1fec 100644
--- a/src/util/events.ts
+++ b/src/util/events.ts
@@ -1,4 +1,4 @@
-import { nativeTimeout } from '../util/dom';
+import { nativeTimeout, nativeRaf } from '../util/dom';
 import { Platform } from '../platform/platform';
 import { ScrollView } from '../util/scroll-view';
 
@@ -135,7 +135,29 @@ export function setupEvents(platform: Platform): Events {
       let content = <HTMLElement>el.closest('.scroll-content');
       if (content) {
         var scroll = new ScrollView(content);
-        scroll.scrollTo(0, 0, 300);
+          // We need to stop scrolling if it's happening and scroll up
+
+        content.style['WebkitBackfaceVisibility'] = 'hidden';
+        content.style['WebkitTransform'] = 'translate3d(0,0,0)';
+
+        nativeRaf(function() {
+          content.style.overflow = 'hidden';
+
+          function finish() {
+            content.style.overflow = '';
+            content.style['WebkitBackfaceVisibility'] = '';
+            content.style['WebkitTransform'] = '';
+          }
+
+          let didScrollTimeout = setTimeout(() => {
+            finish();
+          }, 400);
+
+          scroll.scrollTo(0, 0, 300).then(() => {
+            clearTimeout(didScrollTimeout);
+            finish();
+          });
+        });
       }
     });