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From "Joe Bowser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CB-13947) Back button behavior doesn't revert to default when removing listeners
Date Mon, 05 Mar 2018 19:17:00 GMT

    [ https://issues.apache.org/jira/browse/CB-13947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16386578#comment-16386578
] 

Joe Bowser commented on CB-13947:
---------------------------------

This sounds more like a cordova-js error than a cordova-android error.

> Back button behavior doesn't revert to default when removing listeners
> ----------------------------------------------------------------------
>
>                 Key: CB-13947
>                 URL: https://issues.apache.org/jira/browse/CB-13947
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: cordova-android, cordova-js
>    Affects Versions: cordova-android-7.0.0
>            Reporter: Cedric Reichenbach
>            Assignee: Joe Bowser
>            Priority: Major
>
> When adding a `backbutton` event listener to `document`, Cordova disables default back
button behavior (which is usually closing the app).
> Later, when removing the last event listener, it should re-enable default behavior, but
does not.
> h2. Technical details
> Internally, cordova seems to use a channel to handle document event listener registrations,
which should update the override state on every listener addition/removal: [https://github.com/apache/cordova-android/blob/eddad666ff60129bf716cee61c24d3d65741640f/bin/templates/project/assets/www/cordova.js#L1664]
> However, debugging indicates that `onHasSubscribersChange` is only triggered once, when
adding a listener for the first time, but never on removal.



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