Adds isNode check.

plugins/tungsten-event-intent/index.js

@@ -1,3 +1,5 @@
+/* eslint-env browser */
+
 /**
  * Module to handle "intent" delay on events
  */

plugins/tungsten-event-mouseenter/index.js

@@ -1,15 +1,32 @@
+/* eslint-env browser */
+
 /**
  * Module to handle the shimming in delegated mouseenter events
  */
 'use strict';
 
+/**
+ * Check if passed object is a valid DOM Node
+ * @param  {Object}  node  object to be validated
+ * @return {Boolean}       whether object is a DOM node
+ */
+function isNode(node) {
+  return typeof Node === 'object' ? node instanceof Node :
+    node && typeof node === 'object' && typeof node.nodeType === 'number' &&
+    typeof node.nodeName === 'string';
+}
+
 /**
  * Fallback contains check from http://stackoverflow.com/a/6131052
  * @param  {Element} container Container element
  * @param  {Element} maybe     Element that may be within container
  * @return {Boolean}           Whether container contains maybe
  */
 function contains(container, maybe) {
+  if (!isNode(container) || !isNode(maybe)) {
+    return false;
+  }
+
   // 16 is for a nodeType constant: window.Node.DOCUMENT_POSITION_CONTAINED_BY,
   // but the window.Node object is not available in IE8
   return container.contains ? container.contains(maybe) :

test/plugins/tungsten-event-mouseenter/index_spec.js

@@ -1,5 +1,5 @@
 'use strict';
-var mouseenterleaveBind = require('../../../plugins/tungsten-event-mouseenter');
+var mouseEnterLeaveBind = require('../../../plugins/tungsten-event-mouseenter');
 describe('mouseenter_and_mouseleave_events', function() {
   var elem, otherElem, handler, obj;
   beforeEach(function() {
@@ -23,14 +23,28 @@ describe('mouseenter_and_mouseleave_events', function() {
         });
       };
       spyOn(obj, 'bindEventFn').and.callThrough();
-      mouseenterleaveBind(elem, 'mouseenter', '.js-foo', handler, {}, obj.bindEventFn);
+      mouseEnterLeaveBind(elem, 'mouseenter', '.js-foo', handler, {}, obj.bindEventFn);
       jasmineExpect(obj.bindEventFn).toHaveBeenCalledWith(elem, 'mouseover', '.js-foo', jasmine.any(Function), {});
     });
     it('should not call bindVirtualEvent when event is not mouseenter event', function() {
       var spy = jasmine.createSpy('spy');
-      mouseenterleaveBind(elem, 'notmouseenter', '.js-foo', handler, {}, spy);
+      mouseEnterLeaveBind(elem, 'notmouseenter', '.js-foo', handler, {}, spy);
       jasmineExpect(spy).not.toHaveBeenCalled();
     });
+    it('should not call handler function when currentTarget is not a DOM node', function() {
+      obj.bindEventFn = function(el, eventName, selector, method) {
+        method({
+          currentTarget: {},
+          target: elem,
+          originalEvent: {
+            relatedTarget: otherElem
+          }
+        });
+      };
+      handler = jasmine.createSpy('handler');
+      mouseEnterLeaveBind(elem, 'mouseenter', '.js-foo', handler, {}, obj.bindEventFn);
+      jasmineExpect(handler).not.toHaveBeenCalled();
+    });
 
   });
 
@@ -46,14 +60,28 @@ describe('mouseenter_and_mouseleave_events', function() {
         });
       };
       spyOn(obj, 'bindEventFn').and.callThrough();
-      mouseenterleaveBind(elem, 'mouseleave', '.js-foo', handler, {}, obj.bindEventFn);
+      mouseEnterLeaveBind(elem, 'mouseleave', '.js-foo', handler, {}, obj.bindEventFn);
       jasmineExpect(obj.bindEventFn).toHaveBeenCalledWith(elem, 'mouseout', '.js-foo', jasmine.any(Function), {});
     });
     it('should not call bindVirtualEvent when event is not mouseleave event', function() {
       var spy = jasmine.createSpy('spy');
-      mouseenterleaveBind(elem, 'notmouseleave', '.js-foo', handler, {}, spy);
+      mouseEnterLeaveBind(elem, 'notmouseleave', '.js-foo', handler, {}, spy);
       jasmineExpect(spy).not.toHaveBeenCalled();
     });
+    it('should not call handler function when currentTarget is not a DOM node', function() {
+      obj.bindEventFn = function(el, eventName, selector, method) {
+        method({
+          currentTarget: {},
+          target: elem,
+          originalEvent: {
+            relatedTarget: otherElem
+          }
+        });
+      };
+      handler = jasmine.createSpy('handler');
+      mouseEnterLeaveBind(elem, 'mouseleave', '.js-foo', handler, {}, obj.bindEventFn);
+      jasmineExpect(handler).not.toHaveBeenCalled();
+    });
 
   });
 });