fix(events): extract eventHandler to new function scope.

Author: rkirov

modules/core/src/compiler/view.js

@@ -379,18 +379,7 @@ export class ProtoView {
  // TODO(rado): if there is directive at this element that injected an
  // event emitter for that eventType do not attach the handler.
  MapWrapper.forEach(binder.events, (expr, eventName) => {
- DOM.on(element, eventName, (event) => {
- if (event.target === element) {
- // Most of the time the event will be fired only when the view is
- // in the live document. However, in a rare circumstance the
- // view might get dehydrated, in between the event queuing up and
- // firing.
- // TODO(rado): replace with
- // expr.eval(new ContextWithVariableBindings(view.context, {'$event': event}));
- // when eval with variable bindinds works.
- if (view.hydrated()) expr.eval(view.context);
- }
- });
+ ProtoView._addNativeEventListener(element, eventName, expr, view);
  });
  }
  }
@@ -401,6 +390,21 @@ export class ProtoView {
  return view;
  }
 
+ static _addNativeEventListener(element: Element, eventName: string, expr, view: View) {
+ DOM.on(element, eventName, (event) => {
+ if (event.target === element) {
+ // Most of the time the event will be fired only when the view is
+ // in the live document. However, in a rare circumstance the
+ // view might get dehydrated, in between the event queuing up and
+ // firing.
+ // TODO(rado): replace with
+ // expr.eval(new ContextWithVariableBindings(view.context, {'$event': event}));
+ // when eval with variable bindinds works.
+ if (view.hydrated()) expr.eval(view.context);
+ }
+ });
+ }
+
  _parentElementLightDom(protoElementInjector:ProtoElementInjector, preBuiltObjects:List):LightDom {
  var p = protoElementInjector.parent;
  return isPresent(p) ? preBuiltObjects[p.index].lightDom : null;