AfterPagePreviewUriGeneratedEvent
The
\TYPO3\
is executed in
\TYPO3\, after the preview
URI has been built - or set by an event listener to
BeforePagePreviewUriGeneratedEvent. It allows to overwrite the built
preview URI. However, this event does not feature the possibility to modify the
parameters, since this will not have any effect, as the preview URI is directly
returned after event dispatching and no further action is done by the
\TYPO3\.
Example
<?php
declare(strict_types=1);
namespace MyVendor\MyExtension\Backend\EventListener;
use TYPO3\CMS\Backend\Routing\Event\AfterPagePreviewUriGeneratedEvent;
use TYPO3\CMS\Core\Attribute\AsEventListener;
#[AsEventListener(
identifier: 'my-extension/backend/modify-preview-uri',
)]
final readonly class MyEventListener
{
public function __invoke(AfterPagePreviewUriGeneratedEvent $event): void
{
// Add custom fragment to built preview URI
$uri = $event->getPreviewUri();
$uri = $uri->withFragment('#customFragment');
$event->setPreviewUri($uri);
}
}
New in version 13.0
The PHP attribute
\TYPO3\ has been
introduced to tag a PHP class as an event listener. Alternatively, or if you
need to be compatible with older TYPO3 versions, you can also register an
event listener via the Configuration/Services.yaml file. Switch to
an older version of this page for an example or have a look at the section
Implementing an event listener in your extension.