createAjaxSearchCriteria example

if (!$term || \strlen($term) < Shopware()->Config()->get('MinSearchLenght')) {
            return;
        }

        $this->setDefaultSorting();

        /** @var ShopContextInterface $context */
        $context = $this->get(\Shopware\Bundle\StoreFrontBundle\Service\ContextServiceInterface::class)->getShopContext();

        $criteria = $this->get(\Shopware\Bundle\SearchBundle\StoreFrontCriteriaFactoryInterface::class)
            ->createAjaxSearchCriteria($this->Request(), $context);

        $result = $this->search($term, $criteria, $context);

        if ($result->getTotalCount() > 0) {
            $products = $this->convertProducts($result);
            $this->View()->assign('searchResult', $result);
            $this->View()->assign('sSearchRequest', ['sSearch' => $term]);
            $this->View()->assign('sSearchResults', [
                'sResults' => $products,
                'sArticlesCount' => $result->getTotalCount(),
            ]);
        }