From 70f1309579d0f4d08e23a874e205006382226cc1 Mon Sep 17 00:00:00 2001
From: xbr <2212268909@qq.com>
Date: Sat, 6 Jan 2018 19:17:24 +0800
Subject: [PATCH] fixed #544: while layer.onclick set to null int the handler,
 but the handler still execute.

---
 lib/fastclick.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/fastclick.js b/lib/fastclick.js
index 86bf83e0..972c232e 100644
--- a/lib/fastclick.js
+++ b/lib/fastclick.js
@@ -22,6 +22,7 @@
 	 */
 	function FastClick(layer, options) {
 		var oldOnClick;
+		var oldOnClickNoop = function () {};
 
 		options = options || {};
 
@@ -167,9 +168,11 @@
 			// - the old one won't work if passed to addEventListener directly.
 			oldOnClick = layer.onclick;
 			layer.addEventListener('click', function(event) {
-				oldOnClick(event);
+				if (layer.onclick === oldOnClickNoop) {
+					oldOnClick(event);
+				}
 			}, false);
-			layer.onclick = null;
+			layer.onclick = oldOnClickNoop;
 		}
 	}