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https://issues.apache.org/jira/browse/CB-11394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15456354#comment-15456354
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Joe Bowser commented on CB-11394:
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Is this about the backbutton or menubutton?
> backbutton eventlistener should be able to let cordova execute the default
> native behaviour
> -------------------------------------------------------------------------------------------
>
> Key: CB-11394
> URL: https://issues.apache.org/jira/browse/CB-11394
> Project: Apache Cordova
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Android
> 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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