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https://issues.apache.org/jira/browse/MYFACES-4700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17906644#comment-17906644
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Thomas Andraschko commented on MYFACES-4700:
--------------------------------------------
yeah, actually makes sense
> Javascript AJAX: displayError only when no faces.ajax.addOnError listener was
> registred
> ---------------------------------------------------------------------------------------
>
> Key: MYFACES-4700
> URL: https://issues.apache.org/jira/browse/MYFACES-4700
> Project: MyFaces Core
> Issue Type: Improvement
> Reporter: Thomas Andraschko
> Assignee: Werner Punz
> Priority: Major
> Fix For: 5.0.0, 4.0.3, 4.1.1
>
>
> Currently writing some docs for PF exception handling and there is one
> difference in Mojarra and MyFaces:
> In Mojarra, the error is only shown via alert, when no listener was registred
> and its ProjectStage Development:
> https://github.com/eclipse-ee4j/mojarra/blob/master/impl/src/main/resources/META-INF/resources/jakarta.faces/faces-uncompressed.js#L1442
> In MyFaces, we always use console (or alert if configured) to log the error,
> also if listeners are defined.
> I think we should at least only use console or alert, if no global listener
> is defined. Or only in ProjectStage Development? WDYT [~werpu]?
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