From 9ef3f8d2ed6a2ba6e3b5eab8e50983a1abb1c957 Mon Sep 17 00:00:00 2001
From: Juriy Zaytsev <kangax@gmail.com>
Date: Fri, 13 Nov 2009 12:27:10 -0500
Subject: [PATCH] Eliminate runtime forking and long method lookup in
 `Element.hasAttribute`.

---
 CHANGELOG      |  2 ++
 src/dom/dom.js | 12 ++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index f762443..a194049 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Eliminate runtime forking and long method lookup in `Element.hasAttribute`. (kangax)
+
 * Remove redundant ternary. (kangax)
 
 * Avoid repeating declaration statements where it makes sense, for slightly better runtime performance and minification. (kangax)
diff --git a/src/dom/dom.js b/src/dom/dom.js
index a3db44c..7876327 100644
--- a/src/dom/dom.js
+++ b/src/dom/dom.js
@@ -2036,10 +2036,14 @@ Element.extend = (function() {
   return extend;
 })();
 
-Element.hasAttribute = function(element, attribute) {
-  if (element.hasAttribute) return element.hasAttribute(attribute);
-  return Element.Methods.Simulated.hasAttribute(element, attribute);
-};
+if (document.documentElement.hasAttribute) {
+  Element.hasAttribute = function(element, attribute) {
+    return element.hasAttribute(attribute);
+  };
+}
+else {
+  Element.hasAttribute = Element.Methods.Simulated.hasAttribute;
+}
 
 /**
  *  Element.addMethods(methods) -> undefined