chill-bundles/Form/Extension/CKEditorExtension.php

<?php

namespace Chill\MainBundle\Form\Extension;

use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;
use Symfony\Component\OptionsResolver\OptionsResolver;

/**
 * Class CKEditorTypeExtension
 *
 * @package Chill\MainBundle\Form\Extension
 * @author Mathieu Jaumotte mathieu.jaumotte@champs-libres.coop
 */
class CKEditorExtension extends AbstractTypeExtension
{
    
    /**
     * Return the class of the Textarea Type being extended.
     * @return iterable
     */
    public static function getExtendedTypes(): iterable
    {
        return [TextareaType::class];
    }
    
    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'attr' => [
                'class' => 'ck ck-editor snippet-markdown'
            ]
        ]);
    }
}