[Ajax page] Configure an ajax page in typoscipt

setup.typoscript

ajax_###myextension### = PAGE
ajax_###myextension### {
  typeNum = 6661
  typeNum = {$plugin.tx_###myextension###.settings.###ajaxpagetype###}
  
	config {
		disableAllHeaderCode = 1
		xhtml_cleaning = 0
		admPanel = 0
		additionalHeaders = Content-type: text/plain
		no_cache = 1
	}

	10 = USER
	10 {
		userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
		extensionName = ###MyExtension###
		pluginName = ###list###
		vendorName = ###MYVENDOR###
		controller = ###Controller###
		switchableControllerActions {
			###Controller### {
				1 = ###action###
			}
		}
		view < plugin.tx_###myextension###.view
		persistence < plugin.tx_###myextension###.persistence
		settings < plugin.tx_###myextension###.settings
	}
}