[jira] [Commented] (TAP5-1870) javascript added while in the render phase of a component from an ajax request is never executed

["Paul Stanton (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-1870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13640131#comment-13640131 ] 

Paul Stanton commented on TAP5-1870:
------------------------------------

I've figured out that 

JavaScriptSupport.addScript 
a) works if called from setupRender/afterRender whether XHR or not
b) does not work when called from XHR event handlers

AjaxResponseRenderer.addCallback
a) works for XHR event handlers
b) does not work if called from setupRender/afterRender in an XHR request

Therefore, in the case of the setupRender/afterRender in an XHR request is tricky .. One must detect that this is the context of the call.
                
> javascript added while in the render phase of a component from an ajax request is never executed
> ------------------------------------------------------------------------------------------------
>
>                 Key: TAP5-1870
>                 URL: https://issues.apache.org/jira/browse/TAP5-1870
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.3.2, 5.3.4
>            Reporter: Paul Stanton
>              Labels: ajax, javascript, zone
>
> When a zone update occurs, the 'setupRender' is called for each component contained by that zone.
> If a script is added to ajaxResponseRenderer within the 'setupRender' method it is never executed on the page.
> eg:
> public class MyPage
> {
>     void onSomeEvent()
>     {
>         ajaxResponseRenderer.addRender(myZone); // myZone contains a MyComponent in the tml
>     }
> }
> public class MyComponent
> {
>     void setupRender()
>     {
>         if (request.isXHR())
>             ajaxResponseRenderer.addCallback(new JavaScriptCallback() { public void run(JavaScriptSupport javascriptSupport) {
>                     javascriptSupport.addScript("alert('here');");}});
>     }
> }

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