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https://issues.apache.org/jira/browse/TAP5-1?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649338#action_12649338
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Thiago H. de Paula Figueiredo commented on TAP5-1:
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I would really like this href="#" behaviour to be rolled back, because it
completely prevents the graceful degradation of AJAX links. One other possible
solution would be to generate links as before, but use JavaScript to disable
them. When the DOM is fully loaded, reenable the links through JavaScript.
> Clicking on a link that updates a zone before the page has fully loaded will
> result in a full page update and, often, a server-side exception
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-1
> URL: https://issues.apache.org/jira/browse/TAP5-1
> Project: Tapestry 5
> Issue Type: Bug
> Affects Versions: 5.0.15
> Reporter: Geoff Callender
> Assignee: Howard M. Lewis Ship
> Fix For: 5.0.16
>
>
> I have a page with 2 ActionLinks - the first link updates the whole page; the
> second link specifies a zone.
> If you click on the two links in quick succession then an exception is
> thrown. Alternatively, just Reload the page and click on the second link
> before the page has finished reloading and you'll get the same exception.
> Here's the page, with source:
> http://202.177.217.122:8080/jumpstart/examples/javascript/ajax
> Here's the exception:
> A component event handler method returned the value [EMAIL PROTECTED] Return
> type org.apache.tapestry5.internal.structure.BlockImpl can not be handled.
> Configured return types are java.lang.Class, java.lang.String, java.net.URL,
> org.apache.tapestry5.Link, org.apache.tapestry5.StreamResponse,
> org.apache.tapestry5.runtime.Component.
> I understand that Tapestry doesn't hook up zones etc. until the DOM is
> loaded. It's also been suggested to "check Request#isXhr in your event
> handler to see if it's an AJAX request - if it's not you can't return a
> Block, so you'll have to figure out another way to do what needs to be done."
> However, since this symptom will afflict every AJAX ActionLink
> out-of-the-box, it would be nice if the framework handled it so we don't have
> to code around it.
> Geoff
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