Disable client-side validation on all forms. This is useful in dev and test environments.

.env

CLIENT_SIDE_VALIDATION_ENABLED=1

.env.dev

CLIENT_SIDE_VALIDATION_ENABLED=0

.env.test

CLIENT_SIDE_VALIDATION_ENABLED=0

NoValidateExtension.php

<?php

declare(strict_types=1);

namespace App\Form\Extension;

use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\Extension\Core\Type\FormType;
use Symfony\Component\Form\Form;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;

final class NoValidateExtension extends AbstractTypeExtension
{
    private bool $clientSideValidationEnabled;

    public function __construct(bool $clientSideValidationEnabled)
    {
        $this->clientSideValidationEnabled = $clientSideValidationEnabled;
    }

    /**
     * @return iterable<string>
     */
    public static function getExtendedTypes(): iterable
    {
        return [FormType::class];
    }

    /**
     * {@inheritdoc}
     *
     * @param FormInterface<Form> $form
     * @param array<string, mixed> $options
     */
    public function buildView(FormView $view, FormInterface $form, array $options): void
    {
        if (null === $view->parent && !$this->clientSideValidationEnabled) {
            $view->vars['attr']['novalidate'] = 'novalidate';
        }
    }
}

services.yaml

services:
  # ...
  App\Form\Extension\NoValidateExtension:
    arguments: ['%env(bool:CLIENT_SIDE_VALIDATION_ENABLED)%']