ext_localconf.php

<?php
if (!defined('TYPO3_MODE')) {
	die('Access denied.');
}

// register Extbase plugin
/* @see https://docs.typo3.org/typo3cms/ExtbaseFluidBook/4-FirstExtension/7-configuring-the-plugin.html */
// [Example-5]
\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
	'EHAERER.' . $_EXTKEY, 'Ehbs', array(
	'Abstract' => 'plugin, render',
	),
	// non-cacheable actions
	array(
	'Abstract' => 'render',
	)
);

// register the class for eid Extbase dispatcher
// [Example-6]
$GLOBALS['TYPO3_CONF_VARS']['FE']['eID_include']['ehBootstrap'] = \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extPath($_EXTKEY) . 'Classes/Eid/ExtbaseDispatcher.php';


if (TYPO3_MODE === 'BE') {

	// Register for hook to show preview of tt_content element of CType="yourextensionkey_newcontentelement" in page module
	// renders the backend preview for the extbase plugin and for the content element
	// [Example-4]
	$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/class.tx_cms_layout.php']['tt_content_drawItem']['eh_bs_01'] = \EHAERER\EhBootstrap\Hooks\PageLayoutView\NewContentElementPreviewRenderer::class;

	// register a default scheduler task which is not command controller based
	/* @see https://docs.typo3.org/typo3cms/extensions/scheduler/DevelopersGuide/CreatingTasks/Index.html */
	// [Example-10]
	$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks'][\EHAERER\EhBootstrap\Task\Example::class] = array(
		'extension' => $_EXTKEY,
		'title' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xlf:example_task_h',
		'description' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xlf:example_task_t',
		'additionalFields' => \EHAERER\EhBootstrap\Task\ExampleTaskFields::class
	);

	// register a command controller task
	/* @see https://docs.typo3.org/typo3cms/ExtbaseFluidBook/10-Outlook/3-Command-controllers.html */
	// [Example-11]
	$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['extbase']['commandControllers'][] = \EHAERER\EhBootstrap\Command\ExampleCommandController::class;
}