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https://issues.apache.org/jira/browse/WICKET-6617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16713571#comment-16713571
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ASF GitHub Bot commented on WICKET-6617:
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Github user svenmeier commented on the issue:
https://github.com/apache/wicket/pull/343
We should leave 7.x for people with support for older browsers. Let them
migrate to 8.x if they need newer features.
> Header contribution ignore <wicket:header-items/>
> -------------------------------------------------
>
> Key: WICKET-6617
> URL: https://issues.apache.org/jira/browse/WICKET-6617
> Project: Wicket
> Issue Type: Bug
> Components: wicket-core
> Affects Versions: 8.2.0
> Reporter: Maxim Solodovnik
> Assignee: Maxim Solodovnik
> Priority: Major
> Fix For: 8.3.0, 9.0.0
>
>
> Components added via AJAX and contributing to {{<head>}} using {{@Override
> renderHead}} ignores {{<wicket:header-items/>}} if any
> Here is the example:
> Imaging you have following markup:
> {code}
> <html>
> <head>
> <wicket:header-items/>
> <title>Hello</title>
> </head>
> <body>
> ........
> </body>
> <html>
> {code}
> In your java code you replacing component A with component B on the page via
> AJAX
> Component B contributing to {{<head>}} as follows:
> {code}
> @Override
> public void renderHead(IHeaderResponse response) {
> super.renderHead(response);
> response.render(JavaScriptHeaderItem.forReference(new
> JavaScriptResourceReference(B.class, "some.js")));
> }
> {code}
> As developer I would expect additional JS/CSS files (or any other header
> resources) will be appended before {{<title>}} tag since I have placed
> {{<wicket:header-items/>}} tag
> Currently only initial header resources will take {{<wicket:header-items/>}}
> into account
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