potato-launcher/src/js/components/closeButton.riot

<potato-close-button>
    <button class="button button--icon button--danger button--hover-icon-contrast m-left-4 m-bottom-0" onclick={ (event) => { handleClose(event) } }>
        <svg class="icon icon--big" aria-hidden="true">
            <use xlink:href="symbol-defs.svg#icon-log-out"></use>
        </svg>
    </button>

    <script>

        /**
         *  close app
         *
         *  @author Björn Hase
         *  @license hhttps://www.gnu.org/licenses/gpl-3.0.en.html GPL-3
         *  @link https://gitea.node001.net/HerrHase/potato-launcher.git
         *
         */

        export default {
            handleClose(event) {
                window.close()
            }
        }

    </script>
</potato-close-button>