xiaowang/kirby/config/fields/list.php

<?php

return [
	'props' => [
		/**
		 * Sets the allowed HTML formats. Available formats: `bold`, `italic`, `underline`, `strike`, `code`, `link`. Activate them all by passing `true`. Deactivate them all by passing `false`
		 */
		'marks' => function ($marks = true) {
			return $marks;
		}
	],
	'computed' => [
		'value' => function () {
			return trim($this->value ?? '');
		}
	]
];