Events 

BeforeTemplateCompilationEvent 

Dispatched immediately before a template is compiled. The event provides read-only access to the rendering context and the renderer. Use it to inspect the context (e.g., to log which template is about to be rendered) or to trigger additional rendering via the renderer:

namespace Vendor\Extension\EventListener;

use CPSIT\Typo3Handlebars\Event\BeforeTemplateCompilationEvent;

final readonly class BeforeTemplateCompilationListener
{
    public function __invoke(BeforeTemplateCompilationEvent $event): void
    {
        $context = $event->getContext();   // RenderingContext
        $renderer = $event->getRenderer(); // Renderer
    }
}

BeforeRenderingEvent 

Dispatched after variables have been resolved and merged, immediately before the compiled template is executed. The full variable set can be read and modified:

namespace Vendor\Extension\EventListener;

use CPSIT\Typo3Handlebars\Event\BeforeRenderingEvent;

final readonly class BeforeRenderingListener
{
    public function __invoke(BeforeRenderingEvent $event): void
    {
        // Add a variable
        $event->addVariable('timestamp', time());

        // Replace the entire variable set
        $variables = $event->getVariables();
        $variables['title'] = strtoupper($variables['title'] ?? '');
        $event->setVariables($variables);

        // Remove a variable
        $event->removeVariable('internalFlag');
    }
}

Available methods:

• getVariables() / setVariables(array $variables) — get or replace the full variable set
• addVariable(string $name, mixed $value) — add or overwrite a single variable
• removeVariable(string $name) — remove a variable by name
• getContext() — the RenderingContext (read-only)
• getRenderer() — the Renderer (read-only)

AfterRenderingEvent 

Dispatched after the template has been fully rendered. The rendered HTML string can be read and replaced:

namespace Vendor\Extension\EventListener;

use CPSIT\Typo3Handlebars\Event\AfterRenderingEvent;

final readonly class AfterRenderingListener
{
    public function __invoke(AfterRenderingEvent $event): void
    {
        $content = $event->getContent();
        $event->setContent(trim($content));
    }
}

Available methods:

• getContent() / setContent(string $content) — get or replace the rendered output
• getContext() — the RenderingContext (read-only)
• getRenderer() — the Renderer (read-only)