Philipp Kursawe created CB-11394:
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             Summary: backbutton eventlistener does not respect 
event.defaultPrevented
                 Key: CB-11394
                 URL: https://issues.apache.org/jira/browse/CB-11394
             Project: Apache Cordova
          Issue Type: Bug
          Components: AllPlatforms
            Reporter: Philipp Kursawe


When we override the "menubutton" with a custom handler, cordova completly 
skips handling of the native behaviour (as written in the docs).
It does this even though the events `defaultPrevented` property is set to 
`false`. A proper implementation of event handling would look into this 
property  and act accordingly.

Not sure how this could be introduced now without breaking old code.
Probably old code never returns a value from the event handler. So a patch 
could check if the return value is `===true` then it should perform the default 
native behaviour of that button.



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