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https://issues.apache.org/jira/browse/MYFACES-4588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17697589#comment-17697589
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Melloware commented on MYFACES-4588:
------------------------------------

Yeah that is saying ONLY use `document.body` if `node` is NULL or undefined.  I 
think it needs to be two separate searches not an either or.

> faces.getClientWindow does not retreive client id
> -------------------------------------------------
>
>                 Key: MYFACES-4588
>                 URL: https://issues.apache.org/jira/browse/MYFACES-4588
>             Project: MyFaces Core
>          Issue Type: Bug
>          Components: General
>    Affects Versions: 4.0.0
>            Reporter: Volodymyr Siedlecki
>            Assignee: Werner Punz
>            Priority: Major
>
> Code
> web.xml:
> {color:#d4d4d4} {color}
> {code:java}
> <context-param>
> <param-name>jakarta.faces.CLIENT_WINDOW_MODE</param-name>
> <param-value>url</param-value>
> </context-param>{code}
> {color:#808080}
> {color}
> facelet' script:
> {color:#d4d4d4} {color}
> {code:java}
> var clientWindowId = faces.getClientWindow(document.forms[0]);{code}
> When *faces.{color:#dcdcaa}getClientWindow{color}* is called, it returns null 
> when it should return the client id instead.
> The older JS looks to retrieve the id from the this element (client is not 
> part of the URL on the first request):
> {code:java}
> <input type="hidden" id="j_id__v_0:jakarta.faces.ClientWindow:1" 
> name="jakarta.faces.ClientWindow" value="-tw96zi9et">{code}
> 3.0 JS:
> [https://github.com/apache/myfaces/blob/3.0.x/api/src/main/javascript/META-INF/resources/myfaces/_impl/core/Impl.js#L862-L881]
> 4.0 JS:
> [https://github.com/apache/myfaces/blob/15baed38ba3425c9e8b988906ab5958bf491ec86/api/src/client/typescript/faces/impl/AjaxImpl.ts#L470-L515]



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