[BUGFIX canary] Honor customEvents opting out of event listeners.
#12059
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Setting `customEvents` to a hash in an application is a way to add new
listeners that the `EventDispatcher` knows about.
Often, users see this and decide that they want to disable a given event
(for example `mouseenter` and `mouseleave` events) and think they can do
something like:
```javascript
var App = Ember.Application.create({
customEvents: {
mouseenter: null,
mouseleave: null
}
});
```
Unfortunately, that just makes the `EventDispatcher` call a method named
`null` on the view/component instances (LOL).
This fixes that bug by allowing a `null` value to disable the event
listener.
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Aug 13, 2015
[BUGFIX canary] Honor `customEvents` opting out of event listeners.
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Setting
customEventsto a hash in an application is a way to add new listeners that theEventDispatcherknows about.Often, users see this and decide that they want to disable a given event (for example
mouseenterandmouseleaveevents) and think they can do something like:Unfortunately, that just makes the
EventDispatchercall a method namednullon the view/component instances (LOL).This fixes that bug by allowing a
nullvalue to disable the event listener.Fixes #11540.