Fixing TransitionEnd event.

tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 String _cachedBrowserPrefix;
 
 String get _browserPrefix {
   if (_cachedBrowserPrefix == null) {
     if (_Device.isFirefox) {
       _cachedBrowserPrefix = '-moz-';
     } else if (_Device.isIE) {
       _cachedBrowserPrefix = '-ms-';
     } else if (_Device.isOpera) {
       _cachedBrowserPrefix = '-o-';
     } else {
       _cachedBrowserPrefix = '-webkit-';
     }
   }
   return _cachedBrowserPrefix;
 }
 
+String _cachedBrowserPropertyPrefix;
+
+/// Prefix as used for JS property names.
+String get _browserPropertyPrefix {
+  if (_cachedBrowserPropertyPrefix == null) {
+    if (_Device.isFirefox) {
+      _cachedBrowserPropertyPrefix = 'moz';
+    } else if (_Device.isIE) {
+      _cachedBrowserPropertyPrefix = 'ms';
+    } else if (_Device.isOpera) {
+      _cachedBrowserPropertyPrefix = 'o';
+    } else {
+      _cachedBrowserPropertyPrefix = 'webkit';
+    }
+  }
+  return _cachedBrowserPropertyPrefix;
+}
+
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   factory $CLASSNAME() => _$(CLASSNAME)FactoryProvider.create$CLASSNAME();
   factory $CLASSNAME.css(String css) =>
       _$(CLASSNAME)FactoryProvider.create$(CLASSNAME)_css(css);
 
 $!MEMBERS
 
   String getPropertyValue(String propertyName) {
     var propValue = _getPropertyValue(propertyName);
     return propValue != null ? propValue : '';
   }
 
 $if DART2JS
   void setProperty(String propertyName, String value, [String priority]) {
     JS('void', '#.setProperty(#, #, #)', this, propertyName, value, priority);
     // Bug #2772, IE9 requires a poke to actually apply the value.
     if (JS('bool', '!!#.setAttribute', this)) {
       JS('void', '#.setAttribute(#, #)', this, propertyName, value);
     }
   }
+
+  /**
+   * Checks to see if CSS Transitions are supported.
+   */
+  static bool get supportsTransitions {
+    if (JS('bool', '"transition" in document.body.style')) {
+      return true;
+    }
+    var propertyName = '${_browserPropertyPrefix}Transition';
+    return JS('bool', '# in document.body.style', propertyName);
+  }
+$else
+  /**
+   * Checks to see if CSS Transitions are supported.
+   */
+  static bool get supportsTransitions => true;
 $endif
 
   // TODO(jacobr): generate this list of properties using the existing script.
   /** Gets the value of "align-content" */
   String get alignContent =>
     getPropertyValue('${_browserPrefix}align-content');
 
   /** Sets the value of "align-content" */
   void set alignContent(String value) {
     setProperty('${_browserPrefix}align-content', value, '');
@@ skipping 2909 matching lines @@
   /** Gets the value of "transform-style" */
   String get transformStyle =>
     getPropertyValue('${_browserPrefix}transform-style');
 
   /** Sets the value of "transform-style" */
   void set transformStyle(String value) {
     setProperty('${_browserPrefix}transform-style', value, '');
   }
 
   /** Gets the value of "transition" */
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.FIREFOX)
+  @SupportedBrowser(SupportedBrowser.IE, '10')
+  @SupportedBrowser(SupportedBrowser.SAFARI)
   String get transition =>
     getPropertyValue('${_browserPrefix}transition');
 
   /** Sets the value of "transition" */
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.FIREFOX)
+  @SupportedBrowser(SupportedBrowser.IE, '10')
+  @SupportedBrowser(SupportedBrowser.SAFARI)
   void set transition(String value) {
     setProperty('${_browserPrefix}transition', value, '');
   }
 
   /** Gets the value of "transition-delay" */
   String get transitionDelay =>
     getPropertyValue('${_browserPrefix}transition-delay');
 
   /** Sets the value of "transition-delay" */
   void set transitionDelay(String value) {
@@ skipping 200 matching lines @@
 
   /** Gets the value of "zoom" */
   String get zoom =>
     getPropertyValue('zoom');
 
   /** Sets the value of "zoom" */
   void set zoom(String value) {
     setProperty('zoom', value, '');
   }
 }