From 36ece575ac328f77f0d5d23ae12a085a8c3e9830 Mon Sep 17 00:00:00 2001
From: Brandon Aaron <hello.brandon@aaron.sh>
Date: Wed, 13 Nov 2013 12:21:46 -0500
Subject: [PATCH] Do not fire the event if there is no change in deltaX and
 deltaY

---
 jquery.mousewheel.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/jquery.mousewheel.js b/jquery.mousewheel.js
index 72b83f8f3..d7225fabb 100755
--- a/jquery.mousewheel.js
+++ b/jquery.mousewheel.js
@@ -100,6 +100,9 @@
           delta  = detlaX * -1;
         }
 
+        // No change actually happened, no reason to go any further
+        if ( deltaY === 0 && deltaX === 0 ) { return; }
+
         // Look for lowest delta to normalize the delta values
         absDelta = Math.abs(delta);
         if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; }