From 20fc9ae34329f6f02ba32f4a239d2ac1a9172310 Mon Sep 17 00:00:00 2001
From: or-else <or.else@gmail.com>
Date: Wed, 20 Sep 2017 12:00:54 -0700
Subject: [PATCH] scroll only on material changes

---
 index.html | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/index.html b/index.html
index 14ebb42d..ec4501f0 100644
--- a/index.html
+++ b/index.html
@@ -2358,8 +2358,9 @@
       },
 
       // Scroll last message into view on component update e.g. on message received.
-      componentDidUpdate: function() {
-        if (this.messagesScroller) {
+      componentDidUpdate: function(prevProps, prevState) {
+        if (this.messagesScroller &&
+          (prevState.title != this.state.title || prevState.messages.length != this.state.messages.length)) {
           this.messagesScroller.scrollTop = this.messagesScroller.scrollHeight - this.state.scrollPosition;
         }
       },
@@ -2415,7 +2416,6 @@
             topic: props.topic,
             scrollPosition: 0
           });
-
           tryToResubscribe = true;
         }