diff --git a/CHANGELOG b/CHANGELOG
index 1b67198..0c30302 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Avoid breaking Element.prototype in browsers which support it. Closes #11004. [cfis, Tobie Langel]
+
* Prevent Element#cumulativeOffset, Element#getOffsetParent, Element#positionedOffset, Element#viewportOffset and Element#clonePosition from throwing an error in IE when called on a parent-less element. Closes #9416, #10192, #10248. [ronstoney, psiborg, kangax]
* Prevent Enumerable#eachSlice from entering into an endless loop if passed an argument smaller than 1. Closes #10665. [kangax, Tobie Langel]
diff --git a/src/dom.js b/src/dom.js
index d790b0e..936b408 100644
--- a/src/dom.js
+++ b/src/dom.js
@@ -57,6 +57,7 @@ if (!Node.ELEMENT_NODE) {
return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
};
Object.extend(this.Element, element || { });
+ if (element) this.Element.prototype = element.prototype;
}).call(window);
Element.cache = { };
diff --git a/test/unit/dom.html b/test/unit/dom.html
index 0a7f629..9875226 100644
--- a/test/unit/dom.html
+++ b/test/unit/dom.html
@@ -4,6 +4,9 @@
Prototype Unit test file
+
@@ -1443,6 +1446,11 @@
assertEqual('my_input_field', $(document.body.lastChild).name);
if (Prototype.Browser.IE)
assertMatch(/name=["']?my_input_field["']?/, $('my_input_field').outerHTML);
+
+ if (originalElement && Prototype.BrowserFeatures.ElementExtensions) {
+ Element.prototype.fooBar = Prototype.emptyFunction
+ assertRespondsTo('fooBar', new Element('div'));
+ }
}},
testElementGetHeight: function() {with(this) {