HelloWorldRenderer.php

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<?php
 
declare(strict_types=1);
 
use ILIAS\UI\Implementation\Component\Button\Bulky;
use ILIAS\UI\Implementation\Render\DecoratedRenderer;
use ILIAS\UI\Renderer;
use ILIAS\UI\Implementation\Render\JavaScriptBinding;
use ILIAS\UI\Implementation\Render\ResourceRegistry;
 
class HelloWorldRenderer extends DecoratedRenderer
{
    public function __construct(ResourceRegistry $resource_registry, Renderer $default)
    {
        $this->registerResources($resource_registry);
        parent::__construct($default);
    }
 
    protected function manipulateRendering($component, Renderer $root): ?string
    {
        // if the component is an instance of our custom implementation, we can
        // render it according to our business logic and pass it to the chain.
        if ($component instanceof HelloWorld) {
            return "<p>{$component->getGreeting()}</p>";
        }
 
        // return null to indicate you are not interested in the given component.
        return null;
    }
 
    protected function registerResources(ResourceRegistry $resource_registry): void
    {
        $resource_registry->register('some/asset/path');
    }
}