ext_localconf.php

<?php

/*
 * This file is part of the composer package buepro/typo3-container-elements.
 *
 * For the full copyright and license information, please read the
 * LICENSE file that was distributed with this source code.
 */

defined('TYPO3') || die('Access denied.');

(function () {
    $extensionConfiguration = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
        \TYPO3\CMS\Core\Configuration\ExtensionConfiguration::class
    );
    $containerElementsConfiguration = $extensionConfiguration->get('container_elements');

    /**
     * Load default TS
     */
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScriptSetup(
        '@import "EXT:container_elements/Configuration/TypoScript/setup.typoscript"'
    );

    /**
     * Hooks
     */
    if (1) {
        $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processDatamapClass']
        ['container_elements'] = \Buepro\ContainerElements\Hooks\DataHandlerHook::class;
    }
})();