Using the Fusion View in a Backend Module

FusionController.php

<?php´
namespace Vendor\Site\Controller;

use Neos\Flow\Annotations as Flow;
use Neos\Neos\Controller\Module\AbstractModuleController;
use Neos\Fusion\View\FusionView;

class FusionController extends AbstractModuleController
{
    /**
     * tell the controller to use the fusion view
     */ 
    protected $defaultViewObjectName = FusionView::class;

    public function indexAction(): void
    {
        $this->view->assign('example', 'some value to assign as example');
    }
}

Root.fusion

# require the fusion from other packages
include: resource://Neos.Fusion/Private/Fusion/Root.fusion
include: resource://Neos.Fusion.Form/Private/Fusion/Root.fusion

# assign the controller pathes to prototypes
Vendor.Site.FusionController.index = Vendor.Site:Example

# ofcourse yopu can define the renderer directly on the path aswell
Vendor.Site.FusionController.other = Vendor.Site:Example

# define the actual rendering prototype
prototype(Vendor.Site:Example) < prototype(Neos.Fusion:Component) {
    renderer = afx`
        <h2>Here comes the {example}</h2>
    `
}