This hook is executed before Contao replaces the so called “script tags”, i.e.
[[TL_JQUERY]][[TL_MOOTOOLS]][[TL_BODY]][[TL_CSS]][[TL_HEAD]]These tags will be replaced according to the global arrays containing all the necessary JavaScript & CSS files etc. for the current page.
The hook allows you to replace these script tags yourself, or execute other custom code before the replacement.
string $buffer
The buffer containing the current page output, with the dynamic script tags still in place.
A string containing the (modified) bufffer content.
// src/EventListener/ReplaceDynamicScriptTagsListener.php
namespace App\EventListener;
use Contao\CoreBundle\ServiceAnnotation\Hook;
/**
* @Hook("replaceDynamicScriptTags")
*/
class ReplaceDynamicScriptTagsListener
{
public function __invoke(string $buffer): string
{
// Modify $buffer here …
return $buffer;
}
}