diff --git a/source/components/form/select.mjs b/source/components/form/select.mjs
index 4473fdac0ede813fd7f7944e882de35e89e8909d..23bdb92e56a52d0d242ca4997db13142c7720e70 100644
--- a/source/components/form/select.mjs
+++ b/source/components/form/select.mjs
@@ -12,59 +12,59 @@
  * SPDX-License-Identifier: AGPL-3.0
  */
 
-import { instanceSymbol } from "../../constants.mjs";
-import { internalSymbol } from "../../constants.mjs";
-import { buildMap } from "../../data/buildmap.mjs";
-import { DeadMansSwitch } from "../../util/deadmansswitch.mjs";
-import { positionPopper } from "./util/floating-ui.mjs";
+import {instanceSymbol} from "../../constants.mjs";
+import {internalSymbol} from "../../constants.mjs";
+import {buildMap} from "../../data/buildmap.mjs";
+import {DeadMansSwitch} from "../../util/deadmansswitch.mjs";
+import {positionPopper} from "./util/floating-ui.mjs";
 import {
-	addAttributeToken,
-	findClosestByAttribute,
-	removeAttributeToken,
+    addAttributeToken,
+    findClosestByAttribute,
+    removeAttributeToken,
 } from "../../dom/attributes.mjs";
-import { ATTRIBUTE_PREFIX, ATTRIBUTE_ROLE } from "../../dom/constants.mjs";
-import { CustomControl } from "../../dom/customcontrol.mjs";
+import {ATTRIBUTE_PREFIX, ATTRIBUTE_ROLE} from "../../dom/constants.mjs";
+import {CustomControl} from "../../dom/customcontrol.mjs";
 import {
-	assembleMethodSymbol,
-	getSlottedElements,
-	registerCustomElement,
+    assembleMethodSymbol,
+    getSlottedElements,
+    registerCustomElement,
 } from "../../dom/customelement.mjs";
 import {
-	findTargetElementFromEvent,
-	fireCustomEvent,
-	fireEvent,
+    findTargetElementFromEvent,
+    fireCustomEvent,
+    fireEvent,
 } from "../../dom/events.mjs";
-import { getDocument } from "../../dom/util.mjs";
-import { Formatter } from "../../text/formatter.mjs";
-import { getGlobal } from "../../types/global.mjs";
-import { ID } from "../../types/id.mjs";
+import {getDocument} from "../../dom/util.mjs";
+import {Formatter} from "../../text/formatter.mjs";
+import {getGlobal} from "../../types/global.mjs";
+import {ID} from "../../types/id.mjs";
 import {
-	isArray,
-	isFunction,
-	isInteger,
-	isIterable,
-	isObject,
-	isPrimitive,
-	isString,
+    isArray,
+    isFunction,
+    isInteger,
+    isIterable,
+    isObject,
+    isPrimitive,
+    isString,
 } from "../../types/is.mjs";
-import { Observer } from "../../types/observer.mjs";
-import { ProxyObserver } from "../../types/proxyobserver.mjs";
-import { validateArray, validateString } from "../../types/validate.mjs";
-import { Processing } from "../../util/processing.mjs";
-import { STYLE_DISPLAY_MODE_BLOCK } from "./constants.mjs";
-import { SelectStyleSheet } from "./stylesheet/select.mjs";
+import {Observer} from "../../types/observer.mjs";
+import {ProxyObserver} from "../../types/proxyobserver.mjs";
+import {validateArray, validateString} from "../../types/validate.mjs";
+import {Processing} from "../../util/processing.mjs";
+import {STYLE_DISPLAY_MODE_BLOCK} from "./constants.mjs";
+import {SelectStyleSheet} from "./stylesheet/select.mjs";
 import {
-	getDocumentTranslations,
-	Translations,
+    getDocumentTranslations,
+    Translations,
 } from "../../i18n/translations.mjs";
-import { getLocaleOfDocument } from "../../dom/locale.mjs";
-import { addErrorAttribute, removeErrorAttribute } from "../../dom/error.mjs";
+import {getLocaleOfDocument} from "../../dom/locale.mjs";
+import {addErrorAttribute, removeErrorAttribute} from "../../dom/error.mjs";
 
 export {
-	Select,
-	popperElementSymbol,
-	getSummaryTemplate,
-	getSelectionTemplate,
+    Select,
+    popperElementSymbol,
+    getSummaryTemplate,
+    getSelectionTemplate,
 };
 
 /**
@@ -185,7 +185,7 @@ const popperFilterElementSymbol = Symbol("popperFilterElement");
  * @type {Symbol}
  */
 const popperFilterContainerElementSymbol = Symbol(
-	"popperFilterContainerElement",
+    "popperFilterContainerElement",
 );
 
 /**
@@ -262,7 +262,9 @@ const FILTER_POSITION_POPPER = "popper";
 const FILTER_POSITION_INLINE = "inline";
 
 /**
- * A select control that can be used to select one or more options from a list.
+ * A select control that can be used to select o
+ *
+ * ne or more options from a list.
  *
  * @issue @issue https://localhost.alvine.dev:8444/development/issues/closed/280.html
  *
@@ -282,478 +284,483 @@ const FILTER_POSITION_INLINE = "inline";
  * @fires monster-changed
  */
 class Select extends CustomControl {
-	/**
-	 *
-	 */
-	constructor() {
-		super();
-		initOptionObserver.call(this);
-	}
-
-	/**
-	 * This method is called by the `instanceof` operator.
-	 * @return {Symbol}
-	 */
-	static get [instanceSymbol]() {
-		return Symbol.for("@schukai/monster/components/form/select@@instance");
-	}
-
-	/**
-	 * The current selection of the Select
-	 *
-	 * ```
-	 * e = document.querySelector('monster-select');
-	 * console.log(e.value)
-	 * // ↦ 1
-	 * // ↦ ['1','2']
-	 * ```
-	 *
-	 * @return {string}
-	 */
-	get value() {
-		return convertSelectionToValue.call(this, this.getOption("selection"));
-	}
-
-	/**
-	 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/attachInternals}
-	 * @return {boolean}
-	 */
-	static get formAssociated() {
-		return true;
-	}
-
-	/**
-	 * Set selection
-	 *
-	 * ```
-	 * e = document.querySelector('monster-select');
-	 * e.value=1
-	 * ```
-	 *
-	 * @property {string|array} value
-	 * @throws {Error} unsupported type
-	 * @fires monster-selected this event is fired when the selection is set
-	 */
-	set value(value) {
-		const result = convertValueToSelection.call(this, value);
-		setSelection
-			.call(this, result.selection)
-			.then(() => {})
-			.catch((e) => {
-				addErrorAttribute(this, e);
-			});
-	}
-
-	/**
-	 * To set the options via the HTML tag, the attribute `data-monster-options` must be used.
-	 * @see {@link https://monsterjs.org/en/doc/#configurate-a-monster-control}
-	 *
-	 * The individual configuration values can be found in the table.
-	 *
-	 * @property {Object} toggleEventType=click,touch List of event types to be observed for opening the dropdown
-	 * @property {boolean} delegatesFocus=false lorem [see mozilla.org](https://developer.mozilla.org/en-US/docs/Web/API/ShadowRoot/delegatesFocus)
-	 * @property {Object[]} options Selection of key identifier pairs available for selection and displayed in the dropdown.
-	 * @property {string} options[].label
-	 * @property {string} options[].value
-	 * @property {string} options[].visibility hidden or visible
-	 * @property {Array} selection Selected options
-	 * @property {Integer} showMaxOptions=10 Maximum number of visible options before a scroll bar should be displayed.
-	 * @property {string} type=radio Multiple (checkbox) or single selection (radio)
-	 * @property {string} name=(random id) Name of the form field
-	 * @property {string} url Load options from server per url
-	 * @property {object} lookup Load options from server per url
-	 * @property {string} lookup.url=null Load options from server per url
-	 * @property {boolean} lookup.grouping=false Load all selected options from server per url at once (true) or one by one (false)
-	 * @property {Object} fetch Fetch [see Using Fetch mozilla.org](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)
-	 * @property {String} fetch.redirect=error
-	 * @property {String} fetch.method=GET
-	 * @property {String} fetch.mode=same-origin
-	 * @property {String} fetch.credentials=same-origin
-	 * @property {Object} fetch.headers={"accept":"application/json"}}
-	 * @property {Object} labels
-	 * @property {string} labels.cannot-be-loaded cannot be loaded
-	 * @property {string} labels.no-options-available no options available
-	 * @property {string} labels.select-an-option select an option
-	 * @property {string} labels.no-option no option in the list, maybe you have to change the filter
-	 * @property {Object} features List with features
-	 * @property {Boolean} features.clearAll=true Display of a delete button to delete the entire selection
-	 * @property {Boolean} features.clear=true Display of a delete key for deleting the specific selection
-	 * @property {Boolean} features.lazyLoad=false Load options when first opening the dropdown. (Hint; lazylLoad is not supported with remote filter)
-	 * @property {Boolean} features.closeOnSelect=false Close the dropdown when an option is selected (since 3.54.0)
-	 * @property {Boolean} features.emptyValueIfNoOptions=false If no options are available, the selection is set to an empty array
-	 * @property {Boolean} features.storeFetchedData=false Store fetched data in the object
-	 * @property {Boolean} features.useStrictValueComparison=true Use strict value comparison for the selection
-	 * @property {string} filter.defaultValue=null Default filter value, if the filter is empty, if the default value is null, then no request is made
-	 * @property {Boolean} filter.mode=options Filter mode, values: options, remote, disabled (Hint; lazylLoad is not supported with remote filter, if you use remote filter, the lazyLoad is disabled)
-	 * @property {Object} templates Template definitions
-	 * @property {string} templates.main Main template
-	 * @property {string} templateMapping Mapping of the template placeholders
-	 * @property {string} templateMapping.selected Selected Template
-	 * @property {Object} popper [PopperJS Options](https://popper.js.org/docs/v2/)
-	 * @property {string} popper.placement=bottom PopperJS placement
-	 * @property {Object[]} modifiers={name:offset} PopperJS placement
-	 * @property {Object} mapping
-	 * @property {String} mapping.selector=* Path to select the appropriate entries
-	 * @property {String} mapping.labelTemplate="" template with the label placeholders in the form ${name}, where name is the key (**)
-	 * @property {String} mapping.valueTemplate="" template with the value placeholders in the form ${name}, where name is the key
-	 * @property {Monster.Components.Form~exampleFilterCallback|undefined} mapping.filter Filtering of values via a function
-	 * @property {Object} formatter
-	 * @property {Monster.Components.Form~formatterSelectionCallback|undefined} formatter.selection format selection label
-	 */
-	get defaults() {
-		return Object.assign(
-			{},
-			super.defaults,
-			{
-				toggleEventType: ["click", "touch"],
-				delegatesFocus: false,
-				options: [],
-				selection: [],
-				showMaxOptions: 10,
-				type: "radio",
-				name: new ID("s").toString(),
-				features: {
-					clearAll: true,
-					clear: true,
-					lazyLoad: false,
-					closeOnSelect: false,
-					emptyValueIfNoOptions: false,
-					storeFetchedData: false,
-					useStrictValueComparison: false,
-				},
-				url: null,
-				lookup: {
-					url: null,
-					grouping: false,
-				},
-				labels: getTranslations(),
-				messages: {
-					control: null,
-					selected: null,
-					emptyOptions: null,
-				},
-				fetch: {
-					redirect: "error",
-					method: "GET",
-					mode: "same-origin",
-					credentials: "same-origin",
-					headers: {
-						accept: "application/json",
-					},
-				},
-				filter: {
-					defaultValue: null,
-					mode: FILTER_MODE_DISABLED,
-					position: FILTER_POSITION_INLINE,
-					marker: {
-						open: "{",
-						close: "}",
-					},
-				},
-				classes: {
-					badge: "monster-badge-primary",
-					statusOrRemoveBadge: "empty",
-				},
-				mapping: {
-					selector: "*",
-					labelTemplate: "",
-					valueTemplate: "",
-					filter: null,
-				},
-				formatter: {
-					selection: buildSelectionLabel,
-				},
-				templates: {
-					main: getTemplate(),
-				},
-				templateMapping: {
-					/** with the attribute `data-monster-selected-template` the template for the selected options can be defined. */
-					selected: getSelectionTemplate(),
-				},
-
-				popper: {
-					placement: "bottom",
-					middleware: ["flip", "offset:1"],
-				},
-			},
-			initOptionsFromArguments.call(this),
-		);
-	}
-
-	/**
-	 * @return {Select}
-	 */
-	[assembleMethodSymbol]() {
-		const self = this;
-		super[assembleMethodSymbol]();
-
-		initControlReferences.call(self);
-		initEventHandler.call(self);
-
-		let lazyLoadFlag = self.getOption("features.lazyLoad", false);
-		let remoteFilterFlag = getFilterMode.call(this) === FILTER_MODE_REMOTE;
-
-		if (getFilterMode.call(this) === FILTER_MODE_REMOTE) {
-			self.getOption("features.lazyLoad", false);
-			if (lazyLoadFlag === true) {
-				addErrorAttribute(this, "lazyLoad is not supported with remote filter");
-				lazyLoadFlag = false;
-			}
-		}
-
-		if (self.hasAttribute("value")) {
-			new Processing(10, () => {
-				this.value = this.getAttribute("value");
-			})
-				.run()
-				.catch((e) => {
-					addErrorAttribute(this, e);
-				});
-		}
-
-		if (self.getOption("url") !== null) {
-			if (lazyLoadFlag || remoteFilterFlag) {
-				lookupSelection.call(self);
-			} else {
-				self.fetch().catch((e) => {
-					addErrorAttribute(self, e);
-				});
-			}
-		}
-
-		let lastValue = self.value;
-		self[internalSymbol].attachObserver(
-			new Observer(function () {
-				if (isObject(this) && this instanceof ProxyObserver) {
-					const n = this.getSubject()?.options?.value;
-
-					if (lastValue !== n) {
-						lastValue = n;
-						setSelection
-							.call(self, n)
-							.then(() => {})
-							.catch((e) => {
-								addErrorAttribute(self, e);
-							});
-					}
-				}
-			}),
-		);
-
-		areOptionsAvailableAndInit.call(self);
-
-		return this;
-	}
-
-	/**
-	 *
-	 * @return {*}
-	 * @throws {Error} storeFetchedData is not enabled
-	 * @since 3.66.0
-	 */
-	getLastFetchedData() {
-		if (this.getOption("features.storeFetchedData") === false) {
-			throw new Error("storeFetchedData is not enabled");
-		}
-
-		return this?.[lastFetchedDataSymbol];
-	}
-
-	/**
-	 * The Button.click() method simulates a click on the internal button element.
-	 *
-	 * @since 3.27.0
-	 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/click}
-	 */
-	click() {
-		if (this.getOption("disabled") === true) {
-			return;
-		}
-
-		toggle.call(this);
-	}
-
-	/**
-	 * The Button.focus() method sets focus on the internal button element.
-	 *
-	 * @since 3.27.0
-	 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus}
-	 */
-	focus(options) {
-		if (this.getOption("disabled") === true) {
-			return;
-		}
-
-		new Processing(() => {
-			gatherState.call(this);
-			focusFilter.call(this, options);
-		})
-			.run()
-			.catch((e) => {
-				addErrorAttribute(this, e);
-			});
-	}
-
-	/**
-	 * The Button.blur() method removes focus from the internal button element.
-	 * @link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/blur
-	 */
-	blur() {
-		new Processing(() => {
-			gatherState.call(this);
-			blurFilter.call(this);
-		})
-			.run()
-			.catch((e) => {
-				addErrorAttribute(this, e);
-			});
-	}
-
-	/**
-	 * If no url is specified, the options are taken from the Component itself.
-	 *
-	 * @param {string|URL} url URL to fetch the options
-	 * @return {Promise}
-	 */
-	fetch(url) {
-		return fetchIt.call(this, url);
-	}
-
-	/**
-	 * @return {void}
-	 */
-	connectedCallback() {
-		super.connectedCallback();
-		const document = getDocument();
-
-		for (const [, type] of Object.entries(["click", "touch"])) {
-			// close on outside ui-events
-			document.addEventListener(type, this[closeEventHandler]);
-		}
-
-		parseSlotsToOptions.call(this);
-		attachResizeObserver.call(this);
-		updatePopper.call(this);
-
-		new Processing(() => {
-			gatherState.call(this);
-			focusFilter.call(this);
-		})
-			.run()
-			.catch((e) => {
-				addErrorAttribute(this, e);
-			});
-	}
-
-	/**
-	 * @return {void}
-	 */
-	disconnectedCallback() {
-		super.disconnectedCallback();
-		const document = getDocument();
-
-		// close on outside ui-events
-		for (const [, type] of Object.entries(["click", "touch"])) {
-			document.removeEventListener(type, this[closeEventHandler]);
-		}
-
-		disconnectResizeObserver.call(this);
-	}
-
-	/**
-	 * Import Select Options from dataset
-	 * Not to be confused with the control defaults/options
-	 *
-	 * @param {array|object|Map|Set} data
-	 * @return {Select}
-	 * @throws {Error} map is not iterable
-	 * @throws {Error} missing label configuration
-	 * @fires monster-options-set this event is fired when the options are set
-	 */
-	importOptions(data) {
-		const mappingOptions = this.getOption("mapping", {});
-		const selector = mappingOptions?.["selector"];
-		const labelTemplate = mappingOptions?.["labelTemplate"];
-		const valueTemplate = mappingOptions?.["valueTemplate"];
-		const filter = mappingOptions?.["filter"];
-
-		let flag = false;
-		if (labelTemplate === "") {
-			addErrorAttribute(this, "empty label template");
-			flag = true;
-		}
-
-		if (valueTemplate === "") {
-			addErrorAttribute(this, "empty value template");
-			flag = true;
-		}
-
-		if (flag === true) {
-			throw new Error("missing label configuration");
-		}
-
-		const map = buildMap(data, selector, labelTemplate, valueTemplate, filter);
-
-		const options = [];
-
-		if (!isIterable(map)) {
-			throw new Error("map is not iterable");
-		}
-
-		const visibility = "visible";
-
-		map.forEach((label, value) => {
-			options.push({
-				value,
-				label,
-				visibility,
-				data: map.get(value),
-			});
-		});
-
-		runAsOptionLengthChanged.call(this, map.size);
-		this.setOption("options", options);
-
-		fireCustomEvent(this, "monster-options-set", {
-			options,
-		});
-
-		setTimeout(() => {
-			setSelection
-				.call(this, this.getOption("selection"))
-				.then(() => {})
-				.catch((e) => {
-					addErrorAttribute(this, e);
-				});
-		}, 10);
-
-		return this;
-	}
-
-	/**
-	 * @private
-	 * @return {Select}
-	 */
-	calcAndSetOptionsDimension() {
-		calcAndSetOptionsDimension.call(this);
-		return this;
-	}
-
-	/**
-	 *
-	 * @return {string}
-	 */
-	static getTag() {
-		return "monster-select";
-	}
-
-	/**
-	 *
-	 * @return {CSSStyleSheet[]}
-	 */
-	static getCSSStyleSheet() {
-		return [SelectStyleSheet];
-	}
+    /**
+     *
+     */
+    constructor() {
+        super();
+        initOptionObserver.call(this);
+    }
+
+    /**
+     * This method is called by the `instanceof` operator.
+     * @return {Symbol}
+     */
+    static get [instanceSymbol]() {
+        return Symbol.for("@schukai/monster/components/form/select@@instance");
+    }
+
+    /**
+     * The current selection of the Select
+     *
+     * ```
+     * e = document.querySelector('monster-select');
+     * console.log(e.value)
+     * // ↦ 1
+     * // ↦ ['1','2']
+     * ```
+     *
+     * @return {string}
+     */
+    get value() {
+        return convertSelectionToValue.call(this, this.getOption("selection"));
+    }
+
+    /**
+     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/attachInternals}
+     * @return {boolean}
+     */
+    static get formAssociated() {
+        return true;
+    }
+
+    /**
+     * Set selection
+     *
+     * ```
+     * e = document.querySelector('monster-select');
+     * e.value=1
+     * ```
+     *
+     * @property {string|array} value
+     * @throws {Error} unsupported type
+     * @fires monster-selected this event is fired when the selection is set
+     */
+    set value(value) {
+        const result = convertValueToSelection.call(this, value);
+        setSelection
+            .call(this, result.selection)
+            .then(() => {
+            })
+            .catch((e) => {
+                addErrorAttribute(this, e);
+            });
+    }
+
+    /**
+     * To set the options via the HTML tag, the attribute `data-monster-options` must be used.
+     * @see {@link https://monsterjs.org/en/doc/#configurate-a-monster-control}
+     *
+     * The individual configuration values can be found in the table.
+     *
+     * @property {Object} toggleEventType List of event types to be observed for opening the dropdown
+     * @property {boolean} delegatesFocus lorem [see mozilla.org](https://developer.mozilla.org/en-US/docs/Web/API/ShadowRoot/delegatesFocus)
+     * @property {Object[]} options Selection of key identifier pairs available for selection and displayed in the dropdown.
+     * @property {string} options[].label
+     * @property {string} options[].value
+     * @property {string} options[].visibility hidden or visible
+     * @property {Array} selection Selected options
+     * @property {Integer} showMaxOptions Maximum number of visible options before a scroll bar should be displayed.
+     * @property {string} type Multiple (checkbox) or single selection (radio)
+     * @property {string} name Name of the form field
+     * @property {string} url Load options from server per url
+     * @property {object} lookup Load options from server per url
+     * @property {string} lookup.url Load options from server per url
+     * @property {boolean} lookup.grouping Load all selected options from server per url at once (true) or one by one (false)
+     * @property {Object} fetch Fetch [see Using Fetch mozilla.org](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)
+     * @property {String} fetch.redirect
+     * @property {String} fetch.method
+     * @property {String} fetch.mode
+     * @property {String} fetch.credentials
+     * @property {Object} fetch.headers
+     * @property {Object} labels
+     * @property {string} labels.cannot-be-loaded cannot be loaded
+     * @property {string} labels.no-options-available no options available
+     * @property {string} labels.select-an-option select an option
+     * @property {string} labels.no-option no option in the list, maybe you have to change the filter
+     * @property {Object} features List with features
+     * @property {Boolean} features.clearAll Display of a delete button to delete the entire selection
+     * @property {Boolean} features.clear Display of a delete key for deleting the specific selection
+     * @property {Boolean} features.lazyLoad Load options when first opening the dropdown. (Hint; lazylLoad is not supported with remote filter)
+     * @property {Boolean} features.closeOnSelect Close the dropdown when an option is selected (since 3.54.0)
+     * @property {Boolean} features.emptyValueIfNoOptions If no options are available, the selection is set to an empty array
+     * @property {Boolean} features.storeFetchedData Store fetched data in the object
+     * @property {Boolean} features.useStrictValueComparison Use strict value comparison for the selection
+     * @property {string} filter.defaultValue Default filter value, if the filter is empty, if the default value is null, then no request is made
+     * @property {Boolean} filter.mode Filter mode, values: options, remote, disabled (Hint; lazylLoad is not supported with remote filter, if you use remote filter, the lazyLoad is disabled)
+     * @property {Object} templates Template definitions
+     * @property {string} templates.main Main template
+     * @property {string} templateMapping Mapping of the template placeholders
+     * @property {string} templateMapping.selected Selected Template
+     * @property {Object} popper [PopperJS Options](https://popper.js.org/docs/v2/)
+     * @property {string} popper.placement PopperJS placement
+     * @property {Object[]} modifiers PopperJS placement
+     * @property {Object} mapping
+     * @property {String} mapping.selector Path to select the appropriate entries
+     * @property {String} mapping.labelTemplate template with the label placeholders in the form ${name}, where name is the key (**)
+     * @property {String} mapping.valueTemplate template with the value placeholders in the form ${name}, where name is the key
+     * @property {function|undefined} mapping.filter Filtering of values via a function
+     * @property {Object} formatter
+     * @property {function|undefined} formatter.selection format selection label
+     */
+    get defaults() {
+        return Object.assign(
+            {},
+            super.defaults,
+            {
+                toggleEventType: ["click", "touch"],
+                delegatesFocus: false,
+                options: [],
+                selection: [],
+                showMaxOptions: 10,
+                type: "radio",
+                name: new ID("s").toString(),
+                features: {
+                    clearAll: true,
+                    clear: true,
+                    lazyLoad: false,
+                    closeOnSelect: false,
+                    emptyValueIfNoOptions: false,
+                    storeFetchedData: false,
+                    useStrictValueComparison: false,
+                },
+                url: null,
+                lookup: {
+                    url: null,
+                    grouping: false,
+                },
+                labels: getTranslations(),
+                messages: {
+                    control: null,
+                    selected: null,
+                    emptyOptions: null,
+                },
+                fetch: {
+                    redirect: "error",
+                    method: "GET",
+                    mode: "same-origin",
+                    credentials: "same-origin",
+                    headers: {
+                        accept: "application/json",
+                    },
+                },
+                filter: {
+                    defaultValue: null,
+                    mode: FILTER_MODE_DISABLED,
+                    position: FILTER_POSITION_INLINE,
+                    marker: {
+                        open: "{",
+                        close: "}",
+                    },
+                },
+                classes: {
+                    badge: "monster-badge-primary",
+                    statusOrRemoveBadge: "empty",
+                },
+                mapping: {
+                    selector: "*",
+                    labelTemplate: "",
+                    valueTemplate: "",
+                    filter: null,
+                },
+                formatter: {
+                    selection: buildSelectionLabel,
+                },
+                templates: {
+                    main: getTemplate(),
+                },
+                templateMapping: {
+                    /** with the attribute `data-monster-selected-template` the template for the selected options can be defined. */
+                    selected: getSelectionTemplate(),
+                },
+
+                popper: {
+                    placement: "bottom",
+                    middleware: ["flip", "offset:1"],
+                },
+            },
+            initOptionsFromArguments.call(this),
+        );
+    }
+
+    /**
+     * @return {Select}
+     */
+    [assembleMethodSymbol]() {
+        const self = this;
+        super[assembleMethodSymbol]();
+
+        initControlReferences.call(self);
+        initEventHandler.call(self);
+
+        let lazyLoadFlag = self.getOption("features.lazyLoad", false);
+        let remoteFilterFlag = getFilterMode.call(this) === FILTER_MODE_REMOTE;
+
+        if (getFilterMode.call(this) === FILTER_MODE_REMOTE) {
+            self.getOption("features.lazyLoad", false);
+            if (lazyLoadFlag === true) {
+                addErrorAttribute(this, "lazyLoad is not supported with remote filter");
+                lazyLoadFlag = false;
+            }
+        }
+
+        if (self.hasAttribute("value")) {
+            new Processing(10, () => {
+                this.value = this.getAttribute("value");
+            })
+                .run()
+                .catch((e) => {
+                    addErrorAttribute(this, e);
+                });
+        }
+
+        if (self.getOption("url") !== null) {
+            if (lazyLoadFlag || remoteFilterFlag) {
+                lookupSelection.call(self);
+            } else {
+                self.fetch().catch((e) => {
+                    addErrorAttribute(self, e);
+                });
+            }
+        }
+
+        requestAnimationFrame(() => {
+            let lastValue = self.value;
+            self[internalSymbol].attachObserver(
+                new Observer(function () {
+                    if (isObject(this) && this instanceof ProxyObserver) {
+                        const n = this.getSubject()?.options?.value;
+
+                        if (lastValue !== n && n !== undefined) {
+                            lastValue = n;
+                            setSelection
+                                .call(self, n)
+                                .then(() => {
+                                })
+                                .catch((e) => {
+                                    addErrorAttribute(self, e);
+                                });
+                        }
+                    }
+                }),
+            );
+
+            areOptionsAvailableAndInit.call(self);
+        });
+
+        return this;
+    }
+
+    /**
+     *
+     * @return {*}
+     * @throws {Error} storeFetchedData is not enabled
+     * @since 3.66.0
+     */
+    getLastFetchedData() {
+        if (this.getOption("features.storeFetchedData") === false) {
+            throw new Error("storeFetchedData is not enabled");
+        }
+
+        return this?.[lastFetchedDataSymbol];
+    }
+
+    /**
+     * The Button.click() method simulates a click on the internal button element.
+     *
+     * @since 3.27.0
+     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/click}
+     */
+    click() {
+        if (this.getOption("disabled") === true) {
+            return;
+        }
+
+        toggle.call(this);
+    }
+
+    /**
+     * The Button.focus() method sets focus on the internal button element.
+     *
+     * @since 3.27.0
+     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus}
+     */
+    focus(options) {
+        if (this.getOption("disabled") === true) {
+            return;
+        }
+
+        new Processing(() => {
+            gatherState.call(this);
+            focusFilter.call(this, options);
+        })
+            .run()
+            .catch((e) => {
+                addErrorAttribute(this, e);
+            });
+    }
+
+    /**
+     * The Button.blur() method removes focus from the internal button element.
+     * @link https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/blur
+     */
+    blur() {
+        new Processing(() => {
+            gatherState.call(this);
+            blurFilter.call(this);
+        })
+            .run()
+            .catch((e) => {
+                addErrorAttribute(this, e);
+            });
+    }
+
+    /**
+     * If no url is specified, the options are taken from the Component itself.
+     *
+     * @param {string|URL} url URL to fetch the options
+     * @return {Promise}
+     */
+    fetch(url) {
+        return fetchIt.call(this, url);
+    }
+
+    /**
+     * @return {void}
+     */
+    connectedCallback() {
+        super.connectedCallback();
+        const document = getDocument();
+
+        for (const [, type] of Object.entries(["click", "touch"])) {
+            // close on outside ui-events
+            document.addEventListener(type, this[closeEventHandler]);
+        }
+
+        parseSlotsToOptions.call(this);
+        attachResizeObserver.call(this);
+        updatePopper.call(this);
+
+        new Processing(() => {
+            gatherState.call(this);
+            focusFilter.call(this);
+        })
+            .run()
+            .catch((e) => {
+                addErrorAttribute(this, e);
+            });
+    }
+
+    /**
+     * @return {void}
+     */
+    disconnectedCallback() {
+        super.disconnectedCallback();
+        const document = getDocument();
+
+        // close on outside ui-events
+        for (const [, type] of Object.entries(["click", "touch"])) {
+            document.removeEventListener(type, this[closeEventHandler]);
+        }
+
+        disconnectResizeObserver.call(this);
+    }
+
+    /**
+     * Import Select Options from dataset
+     * Not to be confused with the control defaults/options
+     *
+     * @param {array|object|Map|Set} data
+     * @return {Select}
+     * @throws {Error} map is not iterable
+     * @throws {Error} missing label configuration
+     * @fires monster-options-set this event is fired when the options are set
+     */
+    importOptions(data) {
+        const mappingOptions = this.getOption("mapping", {});
+        const selector = mappingOptions?.["selector"];
+        const labelTemplate = mappingOptions?.["labelTemplate"];
+        const valueTemplate = mappingOptions?.["valueTemplate"];
+        const filter = mappingOptions?.["filter"];
+
+        let flag = false;
+        if (labelTemplate === "") {
+            addErrorAttribute(this, "empty label template");
+            flag = true;
+        }
+
+        if (valueTemplate === "") {
+            addErrorAttribute(this, "empty value template");
+            flag = true;
+        }
+
+        if (flag === true) {
+            throw new Error("missing label configuration");
+        }
+
+        const map = buildMap(data, selector, labelTemplate, valueTemplate, filter);
+
+        const options = [];
+
+        if (!isIterable(map)) {
+            throw new Error("map is not iterable");
+        }
+
+        const visibility = "visible";
+
+        map.forEach((label, value) => {
+            options.push({
+                value,
+                label,
+                visibility,
+                data: map.get(value),
+            });
+        });
+
+        runAsOptionLengthChanged.call(this, map.size);
+        this.setOption("options", options);
+
+        fireCustomEvent(this, "monster-options-set", {
+            options,
+        });
+
+        setTimeout(() => {
+            setSelection
+                .call(this, this.getOption("selection"))
+                .then(() => {
+                })
+                .catch((e) => {
+                    addErrorAttribute(this, e);
+                });
+        }, 10);
+
+        return this;
+    }
+
+    /**
+     * @private
+     * @return {Select}
+     */
+    calcAndSetOptionsDimension() {
+        calcAndSetOptionsDimension.call(this);
+        return this;
+    }
+
+    /**
+     *
+     * @return {string}
+     */
+    static getTag() {
+        return "monster-select";
+    }
+
+    /**
+     *
+     * @return {CSSStyleSheet[]}
+     */
+    static getCSSStyleSheet() {
+        return [SelectStyleSheet];
+    }
 }
 
 /**
@@ -761,285 +768,285 @@ class Select extends CustomControl {
  * @returns {object}
  */
 function getTranslations() {
-	const locale = getLocaleOfDocument();
-	switch (locale.language) {
-		case "de":
-			return {
-				"cannot-be-loaded": "Kann nicht geladen werden",
-				"no-options-available": "Keine Optionen verfügbar.",
-				"click-to-load-options": "Klicken, um Optionen zu laden.",
-				"select-an-option": "Wähle eine Option",
-				"summary-text": {
-					zero: "Keine Einträge ausgewählt",
-					one: '<span class="monster-badge-primary-pill">1</span> Eintrag ausgewählt',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> Einträge ausgewählt',
-				},
-				"no-options": "Leider gibt es keine Optionen in der Liste.",
-				"no-options-found":
-					"Keine Optionen in der Liste verfügbar. Bitte ändern Sie den Filter.",
-			};
-		case "fr":
-			return {
-				"cannot-be-loaded": "Impossible de charger",
-				"no-options-available": "Aucune option disponible.",
-				"click-to-load-options": "Cliquez pour charger les options.",
-				"select-an-option": "Sélectionnez une option",
-				"summary-text": {
-					zero: "Aucune entrée sélectionnée",
-					one: '<span class="monster-badge-primary-pill">1</span> entrée sélectionnée',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> entrées sélectionnées',
-				},
-				"no-options":
-					"Malheureusement, il n'y a pas d'options disponibles dans la liste.",
-				"no-options-found":
-					"Aucune option disponible dans la liste. Veuillez modifier le filtre.",
-			};
-
-		case "sp":
-			return {
-				"cannot-be-loaded": "No se puede cargar",
-				"no-options-available": "No hay opciones disponibles.",
-				"click-to-load-options": "Haga clic para cargar opciones.",
-				"select-an-option": "Seleccione una opción",
-				"summary-text": {
-					zero: "No se seleccionaron entradas",
-					one: '<span class="monster-badge-primary-pill">1</span> entrada seleccionada',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> entradas seleccionadas',
-				},
-				"no-options":
-					"Desafortunadamente, no hay opciones disponibles en la lista.",
-				"no-options-found":
-					"No hay opciones disponibles en la lista. Considere modificar el filtro.",
-			};
-		case "it":
-			return {
-				"cannot-be-loaded": "Non può essere caricato",
-				"no-options-available": "Nessuna opzione disponibile.",
-				"click-to-load-options": "Clicca per caricare le opzioni.",
-				"select-an-option": "Seleziona un'opzione",
-				"summary-text": {
-					zero: "Nessuna voce selezionata",
-					one: '<span class="monster-badge-primary-pill">1</span> voce selezionata',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> voci selezionate',
-				},
-				"no-options": "Purtroppo, non ci sono opzioni disponibili nella lista.",
-				"no-options-found":
-					"Nessuna opzione disponibile nella lista. Si prega di modificare il filtro.",
-			};
-		case "pl":
-			return {
-				"cannot-be-loaded": "Nie można załadować",
-				"no-options-available": "Brak dostępnych opcji.",
-				"click-to-load-options": "Kliknij, aby załadować opcje.",
-				"select-an-option": "Wybierz opcję",
-				"summary-text": {
-					zero: "Nie wybrano żadnych wpisów",
-					one: '<span class="monster-badge-primary-pill">1</span> wpis został wybrany',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> wpisy zostały wybrane',
-				},
-				"no-options": "Niestety, nie ma dostępnych opcji na liście.",
-				"no-options-found":
-					"Brak dostępnych opcji na liście. Rozważ zmianę filtra.",
-			};
-		case "no":
-			return {
-				"cannot-be-loaded": "Kan ikke lastes",
-				"no-options-available": "Ingen alternativer tilgjengelig.",
-				"click-to-load-options": "Klikk for å laste alternativer.",
-				"select-an-option": "Velg et alternativ",
-				"summary-text": {
-					zero: "Ingen oppføringer ble valgt",
-					one: '<span class="monster-badge-primary-pill">1</span> oppføring valgt',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> oppføringer valgt',
-				},
-				"no-options":
-					"Dessverre er det ingen alternativer tilgjengelig i listen.",
-				"no-options-found":
-					"Ingen alternativer tilgjengelig på listen. Vurder å endre filteret.",
-			};
-
-		case "dk":
-			return {
-				"cannot-be-loaded": "Kan ikke indlæses",
-				"no-options-available": "Ingen muligheder tilgængelige.",
-				"click-to-load-options": "Klik for at indlæse muligheder.",
-				"select-an-option": "Vælg en mulighed",
-				"summary-text": {
-					zero: "Ingen indlæg blev valgt",
-					one: '<span class="monster-badge-primary-pill">1</span> indlæg blev valgt',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> indlæg blev valgt',
-				},
-				"no-options":
-					"Desværre er der ingen muligheder tilgængelige på listen.",
-				"no-options-found":
-					"Ingen muligheder tilgængelige på listen. Overvej at ændre filteret.",
-			};
-		case "sw":
-			return {
-				"cannot-be-loaded": "Kan inte laddas",
-				"no-options-available": "Inga alternativ tillgängliga.",
-				"click-to-load-options": "Klicka för att ladda alternativ.",
-				"select-an-option": "Välj ett alternativ",
-				"summary-text": {
-					zero: "Inga poster valdes",
-					one: '<span class="monster-badge-primary-pill">1</span> post valdes',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> poster valdes',
-				},
-				"no-options": "Tyvärr finns det inga alternativ tillgängliga i listan.",
-				"no-options-found":
-					"Inga alternativ finns tillgängliga i listan. Överväg att modifiera filtret.",
-			};
-
-		default:
-		case "en":
-			return {
-				"cannot-be-loaded": "Cannot be loaded",
-				"no-options-available": "No options available.",
-				"click-to-load-options": "Click to load options.",
-				"select-an-option": "Select an option",
-				"summary-text": {
-					zero: "No entries were selected",
-					one: '<span class="monster-badge-primary-pill">1</span> entry was selected',
-					other:
-						'<span class="monster-badge-primary-pill">${count}</span> entries were selected',
-				},
-				"no-options":
-					"Unfortunately, there are no options available in the list.",
-				"no-options-found":
-					"No options are available in the list. Please consider modifying the filter.",
-			};
-	}
+    const locale = getLocaleOfDocument();
+    switch (locale.language) {
+        case "de":
+            return {
+                "cannot-be-loaded": "Kann nicht geladen werden",
+                "no-options-available": "Keine Optionen verfügbar.",
+                "click-to-load-options": "Klicken, um Optionen zu laden.",
+                "select-an-option": "Wähle eine Option",
+                "summary-text": {
+                    zero: "Keine Einträge ausgewählt",
+                    one: '<span class="monster-badge-primary-pill">1</span> Eintrag ausgewählt',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> Einträge ausgewählt',
+                },
+                "no-options": "Leider gibt es keine Optionen in der Liste.",
+                "no-options-found":
+                    "Keine Optionen in der Liste verfügbar. Bitte ändern Sie den Filter.",
+            };
+        case "fr":
+            return {
+                "cannot-be-loaded": "Impossible de charger",
+                "no-options-available": "Aucune option disponible.",
+                "click-to-load-options": "Cliquez pour charger les options.",
+                "select-an-option": "Sélectionnez une option",
+                "summary-text": {
+                    zero: "Aucune entrée sélectionnée",
+                    one: '<span class="monster-badge-primary-pill">1</span> entrée sélectionnée',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> entrées sélectionnées',
+                },
+                "no-options":
+                    "Malheureusement, il n'y a pas d'options disponibles dans la liste.",
+                "no-options-found":
+                    "Aucune option disponible dans la liste. Veuillez modifier le filtre.",
+            };
+
+        case "sp":
+            return {
+                "cannot-be-loaded": "No se puede cargar",
+                "no-options-available": "No hay opciones disponibles.",
+                "click-to-load-options": "Haga clic para cargar opciones.",
+                "select-an-option": "Seleccione una opción",
+                "summary-text": {
+                    zero: "No se seleccionaron entradas",
+                    one: '<span class="monster-badge-primary-pill">1</span> entrada seleccionada',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> entradas seleccionadas',
+                },
+                "no-options":
+                    "Desafortunadamente, no hay opciones disponibles en la lista.",
+                "no-options-found":
+                    "No hay opciones disponibles en la lista. Considere modificar el filtro.",
+            };
+        case "it":
+            return {
+                "cannot-be-loaded": "Non può essere caricato",
+                "no-options-available": "Nessuna opzione disponibile.",
+                "click-to-load-options": "Clicca per caricare le opzioni.",
+                "select-an-option": "Seleziona un'opzione",
+                "summary-text": {
+                    zero: "Nessuna voce selezionata",
+                    one: '<span class="monster-badge-primary-pill">1</span> voce selezionata',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> voci selezionate',
+                },
+                "no-options": "Purtroppo, non ci sono opzioni disponibili nella lista.",
+                "no-options-found":
+                    "Nessuna opzione disponibile nella lista. Si prega di modificare il filtro.",
+            };
+        case "pl":
+            return {
+                "cannot-be-loaded": "Nie można załadować",
+                "no-options-available": "Brak dostępnych opcji.",
+                "click-to-load-options": "Kliknij, aby załadować opcje.",
+                "select-an-option": "Wybierz opcję",
+                "summary-text": {
+                    zero: "Nie wybrano żadnych wpisów",
+                    one: '<span class="monster-badge-primary-pill">1</span> wpis został wybrany',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> wpisy zostały wybrane',
+                },
+                "no-options": "Niestety, nie ma dostępnych opcji na liście.",
+                "no-options-found":
+                    "Brak dostępnych opcji na liście. Rozważ zmianę filtra.",
+            };
+        case "no":
+            return {
+                "cannot-be-loaded": "Kan ikke lastes",
+                "no-options-available": "Ingen alternativer tilgjengelig.",
+                "click-to-load-options": "Klikk for å laste alternativer.",
+                "select-an-option": "Velg et alternativ",
+                "summary-text": {
+                    zero: "Ingen oppføringer ble valgt",
+                    one: '<span class="monster-badge-primary-pill">1</span> oppføring valgt',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> oppføringer valgt',
+                },
+                "no-options":
+                    "Dessverre er det ingen alternativer tilgjengelig i listen.",
+                "no-options-found":
+                    "Ingen alternativer tilgjengelig på listen. Vurder å endre filteret.",
+            };
+
+        case "dk":
+            return {
+                "cannot-be-loaded": "Kan ikke indlæses",
+                "no-options-available": "Ingen muligheder tilgængelige.",
+                "click-to-load-options": "Klik for at indlæse muligheder.",
+                "select-an-option": "Vælg en mulighed",
+                "summary-text": {
+                    zero: "Ingen indlæg blev valgt",
+                    one: '<span class="monster-badge-primary-pill">1</span> indlæg blev valgt',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> indlæg blev valgt',
+                },
+                "no-options":
+                    "Desværre er der ingen muligheder tilgængelige på listen.",
+                "no-options-found":
+                    "Ingen muligheder tilgængelige på listen. Overvej at ændre filteret.",
+            };
+        case "sw":
+            return {
+                "cannot-be-loaded": "Kan inte laddas",
+                "no-options-available": "Inga alternativ tillgängliga.",
+                "click-to-load-options": "Klicka för att ladda alternativ.",
+                "select-an-option": "Välj ett alternativ",
+                "summary-text": {
+                    zero: "Inga poster valdes",
+                    one: '<span class="monster-badge-primary-pill">1</span> post valdes',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> poster valdes',
+                },
+                "no-options": "Tyvärr finns det inga alternativ tillgängliga i listan.",
+                "no-options-found":
+                    "Inga alternativ finns tillgängliga i listan. Överväg att modifiera filtret.",
+            };
+
+        default:
+        case "en":
+            return {
+                "cannot-be-loaded": "Cannot be loaded",
+                "no-options-available": "No options available.",
+                "click-to-load-options": "Click to load options.",
+                "select-an-option": "Select an option",
+                "summary-text": {
+                    zero: "No entries were selected",
+                    one: '<span class="monster-badge-primary-pill">1</span> entry was selected',
+                    other:
+                        '<span class="monster-badge-primary-pill">${count}</span> entries were selected',
+                },
+                "no-options":
+                    "Unfortunately, there are no options available in the list.",
+                "no-options-found":
+                    "No options are available in the list. Please consider modifying the filter.",
+            };
+    }
 }
 
 /**
  * @private
  */
 function lookupSelection() {
-	const self = this;
-
-	setTimeout(() => {
-		const selection = self.getOption("selection");
-		if (selection.length === 0) {
-			return;
-		}
-
-		if (self[isLoadingSymbol] === true) {
-			return;
-		}
-
-		if (self[lazyLoadDoneSymbol] === true) {
-			return;
-		}
-
-		let url = self.getOption("url");
-		let lookupUrl = self.getOption("lookup.url");
-		if (lookupUrl !== null) {
-			url = lookupUrl;
-		}
-
-		if (this.getOption("lookup.grouping") === true) {
-			filterFromRemoteByValue
-				.call(
-					self,
-					url,
-					selection.map((s) => s?.["value"]),
-				)
-				.catch((e) => {
-					addErrorAttribute(self, e);
-				});
-			return;
-		}
-
-		for (const s of selection) {
-			if (s?.["value"]) {
-				filterFromRemoteByValue.call(self, url, s?.["value"]).catch((e) => {
-					addErrorAttribute(self, e);
-				});
-			}
-		}
-	}, 100);
+    const self = this;
+
+    setTimeout(() => {
+        const selection = self.getOption("selection");
+        if (selection.length === 0) {
+            return;
+        }
+
+        if (self[isLoadingSymbol] === true) {
+            return;
+        }
+
+        if (self[lazyLoadDoneSymbol] === true) {
+            return;
+        }
+
+        let url = self.getOption("url");
+        let lookupUrl = self.getOption("lookup.url");
+        if (lookupUrl !== null) {
+            url = lookupUrl;
+        }
+
+        if (this.getOption("lookup.grouping") === true) {
+            filterFromRemoteByValue
+                .call(
+                    self,
+                    url,
+                    selection.map((s) => s?.["value"]),
+                )
+                .catch((e) => {
+                    addErrorAttribute(self, e);
+                });
+            return;
+        }
+
+        for (const s of selection) {
+            if (s?.["value"]) {
+                filterFromRemoteByValue.call(self, url, s?.["value"]).catch((e) => {
+                    addErrorAttribute(self, e);
+                });
+            }
+        }
+    }, 100);
 }
 
 function fetchIt(url, controlOptions) {
-	if (url instanceof URL) {
-		url = url.toString();
-	}
-
-	if (url !== undefined && url !== null) {
-		url = validateString(url);
-	} else {
-		url = this.getOption("url");
-		if (url === null) {
-			return Promise.reject(new Error("No url defined"));
-		}
-	}
-
-	return new Promise((resolve, reject) => {
-		setStatusOrRemoveBadges.call(this, "loading");
-
-		new Processing(10, () => {
-			fetchData
-				.call(this, url)
-				.then((map) => {
-					if (
-						isObject(map) ||
-						isArray(map) ||
-						map instanceof Set ||
-						map instanceof Map
-					) {
-						try {
-							this.importOptions(map);
-						} catch (e) {
-							setStatusOrRemoveBadges.call(this, "error");
-							reject(e);
-							return;
-						}
-
-						this[lastFetchedDataSymbol] = map;
-
-						let result;
-						const selection = this.getOption("selection");
-						let newValue = [];
-						if (selection) {
-							newValue = selection;
-						} else if (this.hasAttribute("value")) {
-							newValue = this.getAttribute("value");
-						}
-
-						result = setSelection.call(this, newValue);
-						requestAnimationFrame(() => {
-							checkOptionState.call(this);
-							setStatusOrRemoveBadges.call(this, "closed");
-							updatePopper.call(this);
-							resolve(result);
-						});
-
-						return;
-					}
-
-					setStatusOrRemoveBadges.call(this, "error");
-					reject(new Error("invalid response"));
-				})
-				.catch((e) => {
-					setStatusOrRemoveBadges.call(this, "error");
-					reject(e);
-				});
-		})
-			.run()
-			.catch((e) => {
-				setStatusOrRemoveBadges.call(this, "error");
-				addErrorAttribute(this, e);
-				reject(e);
-			});
-	});
+    if (url instanceof URL) {
+        url = url.toString();
+    }
+
+    if (url !== undefined && url !== null) {
+        url = validateString(url);
+    } else {
+        url = this.getOption("url");
+        if (url === null) {
+            return Promise.reject(new Error("No url defined"));
+        }
+    }
+
+    return new Promise((resolve, reject) => {
+        setStatusOrRemoveBadges.call(this, "loading");
+
+        new Processing(10, () => {
+            fetchData
+                .call(this, url)
+                .then((map) => {
+                    if (
+                        isObject(map) ||
+                        isArray(map) ||
+                        map instanceof Set ||
+                        map instanceof Map
+                    ) {
+                        try {
+                            this.importOptions(map);
+                        } catch (e) {
+                            setStatusOrRemoveBadges.call(this, "error");
+                            reject(e);
+                            return;
+                        }
+
+                        this[lastFetchedDataSymbol] = map;
+
+                        let result;
+                        const selection = this.getOption("selection");
+                        let newValue = [];
+                        if (selection) {
+                            newValue = selection;
+                        } else if (this.hasAttribute("value")) {
+                            newValue = this.getAttribute("value");
+                        }
+
+                        result = setSelection.call(this, newValue);
+                        requestAnimationFrame(() => {
+                            checkOptionState.call(this);
+                            setStatusOrRemoveBadges.call(this, "closed");
+                            updatePopper.call(this);
+                            resolve(result);
+                        });
+
+                        return;
+                    }
+
+                    setStatusOrRemoveBadges.call(this, "error");
+                    reject(new Error("invalid response"));
+                })
+                .catch((e) => {
+                    setStatusOrRemoveBadges.call(this, "error");
+                    reject(e);
+                });
+        })
+            .run()
+            .catch((e) => {
+                setStatusOrRemoveBadges.call(this, "error");
+                addErrorAttribute(this, e);
+                reject(e);
+            });
+    });
 }
 
 /**
@@ -1054,62 +1061,62 @@ function fetchIt(url, controlOptions) {
  * @return {object}
  */
 function initOptionsFromArguments() {
-	const options = {};
-
-	const template = this.getAttribute("data-monster-selected-template");
-	if (isString(template)) {
-		if (!options["templateMapping"]) options["templateMapping"] = {};
-
-		switch (template) {
-			case "summary":
-			case "default":
-				options["templateMapping"]["selected"] = getSummaryTemplate();
-				break;
-			case "selected":
-				options["templateMapping"]["selected"] = getSelectionTemplate();
-				break;
-			default:
-				addErrorAttribute(this, "invalid template, use summary or selected");
-		}
-	}
-
-	return options;
+    const options = {};
+
+    const template = this.getAttribute("data-monster-selected-template");
+    if (isString(template)) {
+        if (!options["templateMapping"]) options["templateMapping"] = {};
+
+        switch (template) {
+            case "summary":
+            case "default":
+                options["templateMapping"]["selected"] = getSummaryTemplate();
+                break;
+            case "selected":
+                options["templateMapping"]["selected"] = getSelectionTemplate();
+                break;
+            default:
+                addErrorAttribute(this, "invalid template, use summary or selected");
+        }
+    }
+
+    return options;
 }
 
 /**
  * @private
  */
 function attachResizeObserver() {
-	// against flickering
-	this[resizeObserverSymbol] = new ResizeObserver((entries) => {
-		if (this[timerCallbackSymbol] instanceof DeadMansSwitch) {
-			try {
-				this[timerCallbackSymbol].touch();
-				return;
-			} catch (e) {
-				delete this[timerCallbackSymbol];
-			}
-		}
+    // against flickering
+    this[resizeObserverSymbol] = new ResizeObserver((entries) => {
+        if (this[timerCallbackSymbol] instanceof DeadMansSwitch) {
+            try {
+                this[timerCallbackSymbol].touch();
+                return;
+            } catch (e) {
+                delete this[timerCallbackSymbol];
+            }
+        }
 
-		this[timerCallbackSymbol] = new DeadMansSwitch(200, () => {
-			updatePopper.call(this);
-			delete this[timerCallbackSymbol];
-		});
-	});
+        this[timerCallbackSymbol] = new DeadMansSwitch(200, () => {
+            updatePopper.call(this);
+            delete this[timerCallbackSymbol];
+        });
+    });
 
-	requestAnimationFrame(() => {
+    requestAnimationFrame(() => {
 
-		let parent = this.parentNode;
-		while(!(parent instanceof HTMLElement) && parent !== null) {
-			parent = parent.parentNode;
-		}
+        let parent = this.parentNode;
+        while (!(parent instanceof HTMLElement) && parent !== null) {
+            parent = parent.parentNode;
+        }
 
-		if (parent instanceof HTMLElement) {
-			this[resizeObserverSymbol].observe(parent);
-		}
+        if (parent instanceof HTMLElement) {
+            this[resizeObserverSymbol].observe(parent);
+        }
 
 
-	});
+    });
 
 }
 
@@ -1117,9 +1124,9 @@ function attachResizeObserver() {
  * @private
  */
 function disconnectResizeObserver() {
-	if (this[resizeObserverSymbol] instanceof ResizeObserver) {
-		this[resizeObserverSymbol].disconnect();
-	}
+    if (this[resizeObserverSymbol] instanceof ResizeObserver) {
+        this[resizeObserverSymbol].disconnect();
+    }
 }
 
 /**
@@ -1127,7 +1134,7 @@ function disconnectResizeObserver() {
  * @returns {string}
  */
 function getSelectionTemplate() {
-	return `<div data-monster-role="selection" part="selection"
+    return `<div data-monster-role="selection" part="selection"
                  data-monster-insert="selection path:selection" role="search"
             ><input type="text" role="searchbox"
                     part="inline-filter" name="inline-filter"
@@ -1143,7 +1150,7 @@ function getSelectionTemplate() {
  * @returns {string}
  */
 function getSummaryTemplate() {
-	return `<div data-monster-role="selection" role="search" part="summary">
+    return `<div data-monster-role="selection" role="search" part="summary">
     <input type="text" role="searchbox"
            part="inline-filter" name="inline-filter"
            data-monster-role="filter"
@@ -1159,35 +1166,35 @@ function getSummaryTemplate() {
  * @private
  */
 function parseSlotsToOptions() {
-	let options = this.getOption("options");
-	if (!isIterable(options)) {
-		options = [];
-	}
-
-	let counter = 1;
-	getSlottedElements.call(this, "div").forEach((node) => {
-		let value = (counter++).toString();
-		let visibility = "visible";
-
-		if (node.hasAttribute("data-monster-value")) {
-			value = node.getAttribute("data-monster-value");
-		}
-
-		let label = node.outerHTML;
-
-		if (node.style.display === "none") {
-			visibility = "hidden";
-		}
-
-		options.push({
-			value,
-			label,
-			visibility,
-		});
-	});
-
-	runAsOptionLengthChanged.call(this, options.length);
-	this.setOption("options", options);
+    let options = this.getOption("options");
+    if (!isIterable(options)) {
+        options = [];
+    }
+
+    let counter = 1;
+    getSlottedElements.call(this, "div").forEach((node) => {
+        let value = (counter++).toString();
+        let visibility = "visible";
+
+        if (node.hasAttribute("data-monster-value")) {
+            value = node.getAttribute("data-monster-value");
+        }
+
+        let label = node.outerHTML;
+
+        if (node.style.display === "none") {
+            visibility = "hidden";
+        }
+
+        options.push({
+            value,
+            label,
+            visibility,
+        });
+    });
+
+    runAsOptionLengthChanged.call(this, options.length);
+    this.setOption("options", options);
 }
 
 /**
@@ -1197,39 +1204,39 @@ function parseSlotsToOptions() {
  * @param {int} targetLength
  */
 function runAsOptionLengthChanged(targetLength) {
-	const self = this;
-
-	if (!self[optionsElementSymbol]) {
-		return;
-	}
-
-	const callback = function (mutationsList, observer) {
-		const run = false;
-		for (const mutation of mutationsList) {
-			if (mutation.type === "childList") {
-				const run = true;
-				break;
-			}
-		}
-
-		if (run === true) {
-			const nodes = self[optionsElementSymbol].querySelectorAll(
-				`div[${ATTRIBUTE_ROLE}=option]`,
-			);
-
-			if (nodes.length === targetLength) {
-				checkOptionState.call(self);
-				observer.disconnect();
-			}
-		}
-	};
-
-	const observer = new MutationObserver(callback);
-	observer.observe(self[optionsElementSymbol], {
-		attributes: false,
-		childList: true,
-		subtree: true,
-	});
+    const self = this;
+
+    if (!self[optionsElementSymbol]) {
+        return;
+    }
+
+    const callback = function (mutationsList, observer) {
+        const run = false;
+        for (const mutation of mutationsList) {
+            if (mutation.type === "childList") {
+                const run = true;
+                break;
+            }
+        }
+
+        if (run === true) {
+            const nodes = self[optionsElementSymbol].querySelectorAll(
+                `div[${ATTRIBUTE_ROLE}=option]`,
+            );
+
+            if (nodes.length === targetLength) {
+                checkOptionState.call(self);
+                observer.disconnect();
+            }
+        }
+    };
+
+    const observer = new MutationObserver(callback);
+    observer.observe(self[optionsElementSymbol], {
+        attributes: false,
+        childList: true,
+        subtree: true,
+    });
 }
 
 /**
@@ -1238,38 +1245,38 @@ function runAsOptionLengthChanged(targetLength) {
  * @return {*}
  */
 function buildSelectionLabel(value) {
-	const options = this.getOption("options");
-
-	for (let i = 0; i < options.length; i++) {
-		let o = options?.[i];
-		let l, v, v2;
-
-		if (this.getOption("features.useStrictValueComparison") === true) {
-			v = value;
-		} else {
-			v = `${value}`;
-		}
-
-		if (isPrimitive(o) && o === value) {
-			return o;
-		} else if (!isObject(o)) {
-			continue;
-		}
-
-		if (this.getOption("features.useStrictValueComparison") === true) {
-			l = o?.["label"];
-			v2 = o?.["value"];
-		} else {
-			l = `${o?.["label"]}`;
-			v2 = `${o?.["value"]}`;
-		}
-
-		if (v2 === v) {
-			return l;
-		}
-	}
-
-	return undefined;
+    const options = this.getOption("options");
+
+    for (let i = 0; i < options.length; i++) {
+        let o = options?.[i];
+        let l, v, v2;
+
+        if (this.getOption("features.useStrictValueComparison") === true) {
+            v = value;
+        } else {
+            v = `${value}`;
+        }
+
+        if (isPrimitive(o) && o === value) {
+            return o;
+        } else if (!isObject(o)) {
+            continue;
+        }
+
+        if (this.getOption("features.useStrictValueComparison") === true) {
+            l = o?.["label"];
+            v2 = o?.["value"];
+        } else {
+            l = `${o?.["label"]}`;
+            v2 = `${o?.["value"]}`;
+        }
+
+        if (v2 === v) {
+            return l;
+        }
+    }
+
+    return undefined;
 }
 
 /**
@@ -1279,17 +1286,17 @@ function buildSelectionLabel(value) {
  * @throws {Error} no value found
  */
 function getSelectionLabel(value) {
-	const callback = this.getOption("formatter.selection");
-	if (isFunction(callback)) {
-		const label = callback.call(this, value);
-		if (isString(label)) return label;
-	}
+    const callback = this.getOption("formatter.selection");
+    if (isFunction(callback)) {
+        const label = callback.call(this, value);
+        if (isString(label)) return label;
+    }
 
-	if (isString(value) || isInteger(value)) {
-		return `${value}`;
-	}
+    if (isString(value) || isInteger(value)) {
+        return `${value}`;
+    }
 
-	return this.getOption("labels.cannot-be-loaded", value);
+    return this.getOption("labels.cannot-be-loaded", value);
 }
 
 /**
@@ -1297,25 +1304,25 @@ function getSelectionLabel(value) {
  * @param {Event} event
  */
 function handleToggleKeyboardEvents(event) {
-	switch (event?.["code"]) {
-		case "Escape":
-			toggle.call(this);
-			event.preventDefault();
-			break;
-		case "Space":
-			toggle.call(this);
-			event.preventDefault();
-			break;
-		case "ArrowDown":
-			show.call(this);
-			activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
-			event.preventDefault();
-			break;
-		case "ArrowUp":
-			hide.call(this);
-			event.preventDefault();
-			break;
-	}
+    switch (event?.["code"]) {
+        case "Escape":
+            toggle.call(this);
+            event.preventDefault();
+            break;
+        case "Space":
+            toggle.call(this);
+            event.preventDefault();
+            break;
+        case "ArrowDown":
+            show.call(this);
+            activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
+            event.preventDefault();
+            break;
+        case "ArrowUp":
+            hide.call(this);
+            event.preventDefault();
+            break;
+    }
 }
 
 /**
@@ -1325,32 +1332,32 @@ function handleToggleKeyboardEvents(event) {
  * @this CustomElement
  */
 function initOptionObserver() {
-	const self = this;
-
-	self.attachObserver(
-		new Observer(function () {
-			new Processing(() => {
-				try {
-					self.updateI18n();
-				} catch (e) {
-					addErrorAttribute(self, e);
-					requestAnimationFrame(() => {
-						setStatusOrRemoveBadges.call(self, "error");
-					});
-				}
-				try {
-					areOptionsAvailableAndInit.call(self);
-				} catch (e) {
-					addErrorAttribute(self, e);
-					requestAnimationFrame(() => {
-						setStatusOrRemoveBadges.call(self, "error");
-					});
-				}
-
-				setSummaryAndControlText.call(self);
-			}).run();
-		}),
-	);
+    const self = this;
+
+    self.attachObserver(
+        new Observer(function () {
+            new Processing(() => {
+                try {
+                    self.updateI18n();
+                } catch (e) {
+                    addErrorAttribute(self, e);
+                    requestAnimationFrame(() => {
+                        setStatusOrRemoveBadges.call(self, "error");
+                    });
+                }
+                try {
+                    areOptionsAvailableAndInit.call(self);
+                } catch (e) {
+                    addErrorAttribute(self, e);
+                    requestAnimationFrame(() => {
+                        setStatusOrRemoveBadges.call(self, "error");
+                    });
+                }
+
+                setSummaryAndControlText.call(self);
+            }).run();
+        }),
+    );
 }
 
 /**
@@ -1358,16 +1365,17 @@ function initOptionObserver() {
  * @returns {Translations}
  */
 function getDefaultTranslation() {
-	const translation = new Translations("en").assignTranslations(
-		this.getOption("labels", {}),
-	);
+    const translation = new Translations("en").assignTranslations(
+        this.getOption("labels", {}),
+    );
 
-	try {
-		const doc = getDocumentTranslations();
-		translation.locale = doc.locale;
-	} catch (e) {}
+    try {
+        const doc = getDocumentTranslations();
+        translation.locale = doc.locale;
+    } catch (e) {
+    }
 
-	return translation;
+    return translation;
 }
 
 /**
@@ -1375,36 +1383,36 @@ function getDefaultTranslation() {
  * @return {string|*}
  */
 function setSummaryAndControlText() {
-	const translations = getDefaultTranslation.call(this);
-	const selections = this.getOption("selection");
-
-	const text = translations.getPluralRuleText(
-		"summary-text",
-		selections.length,
-		"",
-	);
-
-	const selectedText = new Formatter({
-		count: String(selections.length),
-	}).format(text);
-
-	this.setOption("messages.selected", selectedText);
-
-	const current = this.getOption("messages.control");
-	const msg = this.getOption("labels.select-an-option");
-
-	if (
-		current === "" ||
-		current === undefined ||
-		current === msg ||
-		current === null
-	) {
-		if (selections.length === 0) {
-			this.setOption("messages.control", msg);
-		} else {
-			this.setOption("messages.control", "");
-		}
-	}
+    const translations = getDefaultTranslation.call(this);
+    const selections = this.getOption("selection");
+
+    const text = translations.getPluralRuleText(
+        "summary-text",
+        selections.length,
+        "",
+    );
+
+    const selectedText = new Formatter({
+        count: String(selections.length),
+    }).format(text);
+
+    this.setOption("messages.selected", selectedText);
+
+    const current = this.getOption("messages.control");
+    const msg = this.getOption("labels.select-an-option");
+
+    if (
+        current === "" ||
+        current === undefined ||
+        current === msg ||
+        current === null
+    ) {
+        if (selections.length === 0) {
+            this.setOption("messages.control", msg);
+        } else {
+            this.setOption("messages.control", "");
+        }
+    }
 }
 
 /**
@@ -1412,15 +1420,15 @@ function setSummaryAndControlText() {
  * @return {NodeList}
  */
 function getOptionElements() {
-	return this[optionsElementSymbol].querySelectorAll(
-		`[${ATTRIBUTE_ROLE}=option]`,
-	);
+    return this[optionsElementSymbol].querySelectorAll(
+        `[${ATTRIBUTE_ROLE}=option]`,
+    );
 }
 
 /**
  * With the help of this filter callback, values can be filtered out. Only if the filter function returns true, the value is taken for the map.
  *
- * @callback Monster.Components.Form~exampleFilterCallback
+ * @callback function
  * @param {*} value Value
  * @param {string} key  Key
  * @see Monster.Data.buildMap
@@ -1438,75 +1446,75 @@ function getOptionElements() {
  * @private
  */
 function calcAndSetOptionsDimension() {
-	const options = getOptionElements.call(this);
-	const container = this[optionsElementSymbol];
-	if (!(container instanceof HTMLElement && options instanceof NodeList)) {
-		return;
-	}
-
-	let visible = 0;
-	let optionHeight = 0;
-	const max = this.getOption("showMaxOptions", 10);
-
-	let scrollFlag = false;
-	for (const [, option] of Object.entries(options)) {
-		const computedStyle = getGlobal().getComputedStyle(option);
-		if (computedStyle.display === "none") continue;
-
-		let h = option.getBoundingClientRect().height;
-		h += parseInt(computedStyle.getPropertyValue("margin-top"), 10);
-		h += parseInt(computedStyle.getPropertyValue("margin-bottom"), 10);
-		optionHeight += h;
-
-		visible++;
-
-		if (visible > max) {
-			break;
-		}
-	}
-
-	if (visible > max) {
-		visible = max;
-		scrollFlag = true;
-	}
-
-	if (visible === 0) {
-		if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
-			this.setOption(
-				"messages.emptyOptions",
-				this.getOption("labels.no-options-available"),
-			);
-		} else {
-			this.setOption(
-				"messages.emptyOptions",
-				this.getOption("labels.no-options-found"),
-			);
-		}
-		this[noOptionsAvailableElementSymbol].classList.remove("d-none");
-	} else {
-		this[noOptionsAvailableElementSymbol].classList.add("d-none");
-	}
-
-	const styles = getGlobal().getComputedStyle(this[optionsElementSymbol]);
-	let padding = parseInt(styles.getPropertyValue("padding-top"), 10);
-	padding += parseInt(styles.getPropertyValue("padding-bottom"), 10);
-
-	let margin = parseInt(styles.getPropertyValue("margin-top"), 10);
-	margin += parseInt(styles.getPropertyValue("margin-bottom"), 10);
-
-	const containerHeight = optionHeight + padding + margin;
-	container.style.height = `${containerHeight}px`;
-
-	if (scrollFlag === true) {
-		container.style.overflowY = "scroll";
-	} else {
-		container.style.overflowY = "auto";
-	}
-
-	const domRect = this[controlElementSymbol].getBoundingClientRect();
-
-	this[popperElementSymbol].style.width = `${domRect.width}px`;
-	container.style.overflowX = "auto";
+    const options = getOptionElements.call(this);
+    const container = this[optionsElementSymbol];
+    if (!(container instanceof HTMLElement && options instanceof NodeList)) {
+        return;
+    }
+
+    let visible = 0;
+    let optionHeight = 0;
+    const max = this.getOption("showMaxOptions", 10);
+
+    let scrollFlag = false;
+    for (const [, option] of Object.entries(options)) {
+        const computedStyle = getGlobal().getComputedStyle(option);
+        if (computedStyle.display === "none") continue;
+
+        let h = option.getBoundingClientRect().height;
+        h += parseInt(computedStyle.getPropertyValue("margin-top"), 10);
+        h += parseInt(computedStyle.getPropertyValue("margin-bottom"), 10);
+        optionHeight += h;
+
+        visible++;
+
+        if (visible > max) {
+            break;
+        }
+    }
+
+    if (visible > max) {
+        visible = max;
+        scrollFlag = true;
+    }
+
+    if (visible === 0) {
+        if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
+            this.setOption(
+                "messages.emptyOptions",
+                this.getOption("labels.no-options-available"),
+            );
+        } else {
+            this.setOption(
+                "messages.emptyOptions",
+                this.getOption("labels.no-options-found"),
+            );
+        }
+        this[noOptionsAvailableElementSymbol].classList.remove("d-none");
+    } else {
+        this[noOptionsAvailableElementSymbol].classList.add("d-none");
+    }
+
+    const styles = getGlobal().getComputedStyle(this[optionsElementSymbol]);
+    let padding = parseInt(styles.getPropertyValue("padding-top"), 10);
+    padding += parseInt(styles.getPropertyValue("padding-bottom"), 10);
+
+    let margin = parseInt(styles.getPropertyValue("margin-top"), 10);
+    margin += parseInt(styles.getPropertyValue("margin-bottom"), 10);
+
+    const containerHeight = optionHeight + padding + margin;
+    container.style.height = `${containerHeight}px`;
+
+    if (scrollFlag === true) {
+        container.style.overflowY = "scroll";
+    } else {
+        container.style.overflowY = "auto";
+    }
+
+    const domRect = this[controlElementSymbol].getBoundingClientRect();
+
+    this[popperElementSymbol].style.width = `${domRect.width}px`;
+    container.style.overflowX = "auto";
 }
 
 /**
@@ -1515,126 +1523,126 @@ function calcAndSetOptionsDimension() {
  * @throws {Error} no shadow-root is defined
  */
 function activateCurrentOption(direction) {
-	if (!this.shadowRoot) {
-		throw new Error("no shadow-root is defined");
-	}
-
-	let focused = this.shadowRoot.querySelector(`[${ATTRIBUTE_PREFIX}focused]`);
-
-	if (
-		!(focused instanceof HTMLElement) ||
-		focused.matches("[data-monster-visibility=hidden]")
-	) {
-		for (const [, e] of Object.entries(
-			this.shadowRoot.querySelectorAll(`[${ATTRIBUTE_ROLE}=option]`),
-		)) {
-			if (e.matches("[data-monster-visibility=visible]")) {
-				focused = e;
-				break;
-			}
-		}
-	} else {
-		if (direction === FOCUS_DIRECTION_DOWN) {
-			while (focused.nextSibling) {
-				focused = focused.nextSibling;
-
-				if (
-					focused instanceof HTMLElement &&
-					focused.hasAttribute(ATTRIBUTE_ROLE) &&
-					focused.getAttribute(ATTRIBUTE_ROLE) === "option" &&
-					focused.matches("[data-monster-visibility=visible]") &&
-					focused.matches(":not([data-monster-filtered=true])")
-				) {
-					break;
-				}
-			}
-		} else {
-			let found = false;
-			while (focused.previousSibling) {
-				focused = focused.previousSibling;
-				if (
-					focused instanceof HTMLElement &&
-					focused.hasAttribute(ATTRIBUTE_ROLE) &&
-					focused.getAttribute(ATTRIBUTE_ROLE) === "option" &&
-					focused.matches("[data-monster-visibility=visible]") &&
-					focused.matches(":not([data-monster-filtered=true])")
-				) {
-					found = true;
-					break;
-				}
-			}
-			if (found === false) {
-				focusFilter.call(this);
-			}
-		}
-	}
-
-	new Processing(() => {
-		if (focused instanceof HTMLElement) {
-			this.shadowRoot
-				.querySelectorAll(`[${ATTRIBUTE_PREFIX}focused]`)
-				.forEach((e) => {
-					e.removeAttribute(`${ATTRIBUTE_PREFIX}focused`);
-				});
-
-			focused.focus();
-			focused.setAttribute(`${ATTRIBUTE_PREFIX}focused`, true);
-		}
-	})
-		.run()
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
+    if (!this.shadowRoot) {
+        throw new Error("no shadow-root is defined");
+    }
+
+    let focused = this.shadowRoot.querySelector(`[${ATTRIBUTE_PREFIX}focused]`);
+
+    if (
+        !(focused instanceof HTMLElement) ||
+        focused.matches("[data-monster-visibility=hidden]")
+    ) {
+        for (const [, e] of Object.entries(
+            this.shadowRoot.querySelectorAll(`[${ATTRIBUTE_ROLE}=option]`),
+        )) {
+            if (e.matches("[data-monster-visibility=visible]")) {
+                focused = e;
+                break;
+            }
+        }
+    } else {
+        if (direction === FOCUS_DIRECTION_DOWN) {
+            while (focused.nextSibling) {
+                focused = focused.nextSibling;
+
+                if (
+                    focused instanceof HTMLElement &&
+                    focused.hasAttribute(ATTRIBUTE_ROLE) &&
+                    focused.getAttribute(ATTRIBUTE_ROLE) === "option" &&
+                    focused.matches("[data-monster-visibility=visible]") &&
+                    focused.matches(":not([data-monster-filtered=true])")
+                ) {
+                    break;
+                }
+            }
+        } else {
+            let found = false;
+            while (focused.previousSibling) {
+                focused = focused.previousSibling;
+                if (
+                    focused instanceof HTMLElement &&
+                    focused.hasAttribute(ATTRIBUTE_ROLE) &&
+                    focused.getAttribute(ATTRIBUTE_ROLE) === "option" &&
+                    focused.matches("[data-monster-visibility=visible]") &&
+                    focused.matches(":not([data-monster-filtered=true])")
+                ) {
+                    found = true;
+                    break;
+                }
+            }
+            if (found === false) {
+                focusFilter.call(this);
+            }
+        }
+    }
+
+    new Processing(() => {
+        if (focused instanceof HTMLElement) {
+            this.shadowRoot
+                .querySelectorAll(`[${ATTRIBUTE_PREFIX}focused]`)
+                .forEach((e) => {
+                    e.removeAttribute(`${ATTRIBUTE_PREFIX}focused`);
+                });
+
+            focused.focus();
+            focused.setAttribute(`${ATTRIBUTE_PREFIX}focused`, true);
+        }
+    })
+        .run()
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
 }
 
 /**
  * @private
  */
 function filterOptions() {
-	new Processing(() => {
-		let filterValue;
-
-		switch (this.getOption("filter.position")) {
-			case FILTER_POSITION_INLINE:
-				if (this[inlineFilterElementSymbol] instanceof HTMLElement) {
-					filterValue = this[inlineFilterElementSymbol].value.toLowerCase();
-				} else {
-					return;
-				}
-
-				break;
-			case FILTER_POSITION_POPPER:
-			default:
-				if (this[popperFilterElementSymbol] instanceof HTMLInputElement) {
-					filterValue = this[popperFilterElementSymbol].value.toLowerCase();
-				} else {
-					return;
-				}
-		}
-
-		const options = this.getOption("options");
-		for (const [i, option] of Object.entries(options)) {
-			if (option.label.toLowerCase().indexOf(filterValue) === -1) {
-				this.setOption(`options.${i}.filtered`, "true");
-			} else {
-				this.setOption(`options.${i}.filtered`, undefined);
-			}
-		}
-	})
-		.run()
-		.then(() => {
-			new Processing(100, () => {
-				calcAndSetOptionsDimension.call(this);
-				focusFilter.call(this);
-			})
-				.run()
-				.catch((e) => {
-					addErrorAttribute(this, e);
-				});
-		})
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
+    new Processing(() => {
+        let filterValue;
+
+        switch (this.getOption("filter.position")) {
+            case FILTER_POSITION_INLINE:
+                if (this[inlineFilterElementSymbol] instanceof HTMLElement) {
+                    filterValue = this[inlineFilterElementSymbol].value.toLowerCase();
+                } else {
+                    return;
+                }
+
+                break;
+            case FILTER_POSITION_POPPER:
+            default:
+                if (this[popperFilterElementSymbol] instanceof HTMLInputElement) {
+                    filterValue = this[popperFilterElementSymbol].value.toLowerCase();
+                } else {
+                    return;
+                }
+        }
+
+        const options = this.getOption("options");
+        for (const [i, option] of Object.entries(options)) {
+            if (option.label.toLowerCase().indexOf(filterValue) === -1) {
+                this.setOption(`options.${i}.filtered`, "true");
+            } else {
+                this.setOption(`options.${i}.filtered`, undefined);
+            }
+        }
+    })
+        .run()
+        .then(() => {
+            new Processing(100, () => {
+                calcAndSetOptionsDimension.call(this);
+                focusFilter.call(this);
+            })
+                .run()
+                .catch((e) => {
+                    addErrorAttribute(this, e);
+                });
+        })
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
 }
 
 /**
@@ -1642,37 +1650,37 @@ function filterOptions() {
  * @param {Event} event
  */
 function handleFilterKeyboardEvents(event) {
-	const shiftKey = event?.["shiftKey"];
-
-	switch (event?.["code"]) {
-		case "Tab":
-			activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
-			event.preventDefault();
-			break;
-		case "Escape":
-			toggle.call(this);
-			event.preventDefault();
-			break;
-		case "Tab" && shiftKey === true:
-		case "ArrowUp":
-			activateCurrentOption.call(this, FOCUS_DIRECTION_UP);
-			event.preventDefault();
-			break;
-		case "Tab" && !shiftKey:
-		case "ArrowDown":
-			activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
-			event.preventDefault();
-			break;
-		default:
-			if (
-				this.getOption("features.lazyLoad") === true &&
-				this[lazyLoadDoneSymbol] !== true
-			) {
-				this.click();
-			}
-
-			handleFilterKeyEvents.call(this);
-	}
+    const shiftKey = event?.["shiftKey"];
+
+    switch (event?.["code"]) {
+        case "Tab":
+            activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
+            event.preventDefault();
+            break;
+        case "Escape":
+            toggle.call(this);
+            event.preventDefault();
+            break;
+        case "Tab" && shiftKey === true:
+        case "ArrowUp":
+            activateCurrentOption.call(this, FOCUS_DIRECTION_UP);
+            event.preventDefault();
+            break;
+        case "Tab" && !shiftKey:
+        case "ArrowDown":
+            activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
+            event.preventDefault();
+            break;
+        default:
+            if (
+                this.getOption("features.lazyLoad") === true &&
+                this[lazyLoadDoneSymbol] !== true
+            ) {
+                this.click();
+            }
+
+            handleFilterKeyEvents.call(this);
+    }
 }
 
 /**
@@ -1686,86 +1694,86 @@ function handleFilterKeyboardEvents(event) {
  * @return {void} This method does not return anything.
  */
 function handleFilterKeyEvents() {
-	if (this[keyFilterEventSymbol] instanceof DeadMansSwitch) {
-		try {
-			this[keyFilterEventSymbol].touch();
-			return;
-		} catch (e) {
-			delete this[keyFilterEventSymbol];
-		}
-	}
-
-	this[keyFilterEventSymbol] = new DeadMansSwitch(200, () => {
-		if (getFilterMode.call(this) !== FILTER_MODE_REMOTE) {
-			filterOptions.call(this);
-		} else {
-			filterFromRemote.call(this).catch((e) => {
-				addErrorAttribute(this, e);
-			});
-		}
-
-		delete this[keyFilterEventSymbol];
-	});
+    if (this[keyFilterEventSymbol] instanceof DeadMansSwitch) {
+        try {
+            this[keyFilterEventSymbol].touch();
+            return;
+        } catch (e) {
+            delete this[keyFilterEventSymbol];
+        }
+    }
+
+    this[keyFilterEventSymbol] = new DeadMansSwitch(200, () => {
+        if (getFilterMode.call(this) !== FILTER_MODE_REMOTE) {
+            filterOptions.call(this);
+        } else {
+            filterFromRemote.call(this).catch((e) => {
+                addErrorAttribute(this, e);
+            });
+        }
+
+        delete this[keyFilterEventSymbol];
+    });
 }
 
 /**
  * @private
  */
 function filterFromRemote() {
-	if (
-		!(this[inlineFilterElementSymbol] instanceof HTMLElement) &&
-		!(this[popperFilterElementSymbol] instanceof HTMLElement)
-	) {
-		return;
-	}
-
-	show.call(this);
-
-	const url = this.getOption("url");
-	if (!url) {
-		addErrorAttribute(this, "Missing URL for Remote Filter.");
-		return;
-	}
-
-	let filterValue;
-
-	switch (this.getOption("filter.position")) {
-		case FILTER_POSITION_INLINE:
-			if (this[inlineFilterElementSymbol] instanceof HTMLElement) {
-				filterValue = this[inlineFilterElementSymbol].value.toLowerCase();
-			}
-
-			break;
-		case FILTER_POSITION_POPPER:
-		default:
-			if (this[popperFilterElementSymbol] instanceof HTMLInputElement) {
-				filterValue = this[popperFilterElementSymbol].value.toLowerCase();
-			}
-	}
-
-	return filterFromRemoteByValue.call(this, url, filterValue);
+    if (
+        !(this[inlineFilterElementSymbol] instanceof HTMLElement) &&
+        !(this[popperFilterElementSymbol] instanceof HTMLElement)
+    ) {
+        return;
+    }
+
+    show.call(this);
+
+    const url = this.getOption("url");
+    if (!url) {
+        addErrorAttribute(this, "Missing URL for Remote Filter.");
+        return;
+    }
+
+    let filterValue;
+
+    switch (this.getOption("filter.position")) {
+        case FILTER_POSITION_INLINE:
+            if (this[inlineFilterElementSymbol] instanceof HTMLElement) {
+                filterValue = this[inlineFilterElementSymbol].value.toLowerCase();
+            }
+
+            break;
+        case FILTER_POSITION_POPPER:
+        default:
+            if (this[popperFilterElementSymbol] instanceof HTMLInputElement) {
+                filterValue = this[popperFilterElementSymbol].value.toLowerCase();
+            }
+    }
+
+    return filterFromRemoteByValue.call(this, url, filterValue);
 }
 
 function formatURL(url, value) {
-	if (value === undefined || value === null || value === "") {
-		value = this.getOption("filter.defaultValue");
-		if (value === undefined || value === null || value === "") {
-			value = disabledRequestMarker.toString();
-		}
-	}
-
-	const formatter = new Formatter({ filter: encodeURI(value) });
-	const openMarker = this.getOption("filter.marker.open");
-	let closeMarker = this.getOption("filter.marker.close");
-	if (!closeMarker) {
-		closeMarker = openMarker;
-	}
-
-	if (openMarker && closeMarker) {
-		formatter.setMarker(openMarker, closeMarker);
-	}
-
-	return formatter.format(url);
+    if (value === undefined || value === null || value === "") {
+        value = this.getOption("filter.defaultValue");
+        if (value === undefined || value === null || value === "") {
+            value = disabledRequestMarker.toString();
+        }
+    }
+
+    const formatter = new Formatter({filter: encodeURI(value)});
+    const openMarker = this.getOption("filter.marker.open");
+    let closeMarker = this.getOption("filter.marker.close");
+    if (!closeMarker) {
+        closeMarker = openMarker;
+    }
+
+    if (openMarker && closeMarker) {
+        formatter.setMarker(openMarker, closeMarker);
+    }
+
+    return formatter.format(url);
 }
 
 /**
@@ -1775,28 +1783,28 @@ function formatURL(url, value) {
  * @returns {Promise<unknown>}
  */
 function filterFromRemoteByValue(optionUrl, value) {
-	return new Processing(() => {
-		let url = formatURL.call(this, optionUrl, value);
-		if (url.indexOf(disabledRequestMarker.toString()) !== -1) {
-			return;
-		}
-
-		fetchIt
-			.call(this, url, {
-				disableHiding: true,
-			})
-			.then(() => {
-				checkOptionState.call(this);
-				show.call(this);
-			})
-			.catch((e) => {
-				throw e;
-			});
-	})
-		.run()
-		.catch((e) => {
-			throw e;
-		});
+    return new Processing(() => {
+        let url = formatURL.call(this, optionUrl, value);
+        if (url.indexOf(disabledRequestMarker.toString()) !== -1) {
+            return;
+        }
+
+        fetchIt
+            .call(this, url, {
+                disableHiding: true,
+            })
+            .then(() => {
+                checkOptionState.call(this);
+                show.call(this);
+            })
+            .catch((e) => {
+                throw e;
+            });
+    })
+        .run()
+        .catch((e) => {
+            throw e;
+        });
 }
 
 /**
@@ -1804,50 +1812,50 @@ function filterFromRemoteByValue(optionUrl, value) {
  * @private
  */
 function handleOptionKeyboardEvents(event) {
-	const shiftKey = event?.["shiftKey"];
-
-	switch (event?.["code"]) {
-		case "Escape":
-			toggle.call(this);
-			event.preventDefault();
-			break;
-		case "Enter":
-		case "Space":
-			const path = event.composedPath();
-			const element = path?.[0];
-			if (element instanceof HTMLElement) {
-				const input = element.getElementsByTagName("input");
-				if (!input) {
-					return;
-				}
-				fireEvent(input, "click");
-			}
-			event.preventDefault();
-			break;
-
-		case "Tab" && shiftKey === true:
-		case "ArrowUp":
-			activateCurrentOption.call(this, FOCUS_DIRECTION_UP);
-			event.preventDefault();
-			break;
-
-		case "Tab" && !shiftKey:
-		case "ArrowLeft":
-		case "ArrowRight":
-			// handled by tree select
-			break;
-		case "ArrowDown":
-			activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
-			event.preventDefault();
-			break;
-		default:
-			const p = event.composedPath();
-			if (p?.[0] instanceof HTMLInputElement) {
-				return;
-			}
-			focusFilter.call(this);
-			break;
-	}
+    const shiftKey = event?.["shiftKey"];
+
+    switch (event?.["code"]) {
+        case "Escape":
+            toggle.call(this);
+            event.preventDefault();
+            break;
+        case "Enter":
+        case "Space":
+            const path = event.composedPath();
+            const element = path?.[0];
+            if (element instanceof HTMLElement) {
+                const input = element.getElementsByTagName("input");
+                if (!input) {
+                    return;
+                }
+                fireEvent(input, "click");
+            }
+            event.preventDefault();
+            break;
+
+        case "Tab" && shiftKey === true:
+        case "ArrowUp":
+            activateCurrentOption.call(this, FOCUS_DIRECTION_UP);
+            event.preventDefault();
+            break;
+
+        case "Tab" && !shiftKey:
+        case "ArrowLeft":
+        case "ArrowRight":
+            // handled by tree select
+            break;
+        case "ArrowDown":
+            activateCurrentOption.call(this, FOCUS_DIRECTION_DOWN);
+            event.preventDefault();
+            break;
+        default:
+            const p = event.composedPath();
+            if (p?.[0] instanceof HTMLInputElement) {
+                return;
+            }
+            focusFilter.call(this);
+            break;
+    }
 }
 
 /**
@@ -1855,33 +1863,33 @@ function handleOptionKeyboardEvents(event) {
  * @return {string}
  */
 function getFilterMode() {
-	switch (this.getOption("filter.mode")) {
-		case FILTER_MODE_OPTIONS:
-			return FILTER_MODE_OPTIONS;
-		case FILTER_MODE_REMOTE:
-			return FILTER_MODE_REMOTE;
-		default:
-			return FILTER_MODE_DISABLED;
-	}
+    switch (this.getOption("filter.mode")) {
+        case FILTER_MODE_OPTIONS:
+            return FILTER_MODE_OPTIONS;
+        case FILTER_MODE_REMOTE:
+            return FILTER_MODE_REMOTE;
+        default:
+            return FILTER_MODE_DISABLED;
+    }
 }
 
 /**
  * @private
  */
 function blurFilter() {
-	if (!(this[inlineFilterElementSymbol] instanceof HTMLElement)) {
-		return;
-	}
+    if (!(this[inlineFilterElementSymbol] instanceof HTMLElement)) {
+        return;
+    }
 
-	if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
-		return;
-	}
+    if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
+        return;
+    }
 
-	this[popperFilterContainerElementSymbol].classList.remove("active");
-	this[popperFilterContainerElementSymbol].blur();
+    this[popperFilterContainerElementSymbol].classList.remove("active");
+    this[popperFilterContainerElementSymbol].blur();
 
-	this[inlineFilterElementSymbol].classList.remove("active");
-	this[inlineFilterElementSymbol].blur();
+    this[inlineFilterElementSymbol].classList.remove("active");
+    this[inlineFilterElementSymbol].blur();
 }
 
 /**
@@ -1889,25 +1897,25 @@ function blurFilter() {
  * @param focusOptions
  */
 function focusPopperFilter(focusOptions) {
-	this[popperFilterContainerElementSymbol].classList.remove("d-none");
-	this[popperFilterElementSymbol].classList.add("active");
-	this[inlineFilterElementSymbol].classList.remove("active");
-	this[inlineFilterElementSymbol].classList.add("d-none");
-
-	if (!(this[popperFilterElementSymbol] instanceof HTMLElement)) {
-		addErrorAttribute(this, "Missing Popper Filter Element.");
-		return;
-	}
-
-	// visibility is set to visible, because focus() does not work on invisible elements
-	// and the class definition is assigned later in the processing
-	setTimeout(() => {
-		if (focusOptions === undefined || focusOptions === null) {
-			this[popperFilterElementSymbol].focus();
-		} else {
-			this[popperFilterElementSymbol].focus(focusOptions);
-		}
-	}, 100);
+    this[popperFilterContainerElementSymbol].classList.remove("d-none");
+    this[popperFilterElementSymbol].classList.add("active");
+    this[inlineFilterElementSymbol].classList.remove("active");
+    this[inlineFilterElementSymbol].classList.add("d-none");
+
+    if (!(this[popperFilterElementSymbol] instanceof HTMLElement)) {
+        addErrorAttribute(this, "Missing Popper Filter Element.");
+        return;
+    }
+
+    // visibility is set to visible, because focus() does not work on invisible elements
+    // and the class definition is assigned later in the processing
+    setTimeout(() => {
+        if (focusOptions === undefined || focusOptions === null) {
+            this[popperFilterElementSymbol].focus();
+        } else {
+            this[popperFilterElementSymbol].focus(focusOptions);
+        }
+    }, 100);
 }
 
 /**
@@ -1915,44 +1923,44 @@ function focusPopperFilter(focusOptions) {
  * @param focusOptions
  */
 function focusInlineFilter(focusOptions) {
-	const options = this.getOption("options");
-	if (
-		(!isArray(options) || options.length === 0) &&
-		getFilterMode.call(this) !== FILTER_MODE_REMOTE
-	) {
-		return;
-	}
-
-	this[popperFilterContainerElementSymbol].classList.add("d-none");
-	this[inlineFilterElementSymbol].classList.add("active");
-	this[inlineFilterElementSymbol].classList.remove("d-none");
-
-	// visibility is set to visible, because focus() does not work on invisible elements
-	// and the class definition is assigned later in the processing
-	setTimeout(() => {
-		if (focusOptions === undefined || focusOptions === null) {
-			this[inlineFilterElementSymbol].focus();
-		} else {
-			this[inlineFilterElementSymbol].focus(focusOptions);
-		}
-	}, 100);
+    const options = this.getOption("options");
+    if (
+        (!isArray(options) || options.length === 0) &&
+        getFilterMode.call(this) !== FILTER_MODE_REMOTE
+    ) {
+        return;
+    }
+
+    this[popperFilterContainerElementSymbol].classList.add("d-none");
+    this[inlineFilterElementSymbol].classList.add("active");
+    this[inlineFilterElementSymbol].classList.remove("d-none");
+
+    // visibility is set to visible, because focus() does not work on invisible elements
+    // and the class definition is assigned later in the processing
+    setTimeout(() => {
+        if (focusOptions === undefined || focusOptions === null) {
+            this[inlineFilterElementSymbol].focus();
+        } else {
+            this[inlineFilterElementSymbol].focus(focusOptions);
+        }
+    }, 100);
 }
 
 /**
  * @private
  */
 function focusFilter(focusOptions) {
-	if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
-		this[popperFilterContainerElementSymbol].classList.add("d-none");
-		this[inlineFilterElementSymbol].classList.add("d-none");
-		return;
-	}
+    if (getFilterMode.call(this) === FILTER_MODE_DISABLED) {
+        this[popperFilterContainerElementSymbol].classList.add("d-none");
+        this[inlineFilterElementSymbol].classList.add("d-none");
+        return;
+    }
 
-	if (this.getOption("filter.position") === FILTER_POSITION_INLINE) {
-		return focusInlineFilter.call(this, focusOptions);
-	}
+    if (this.getOption("filter.position") === FILTER_POSITION_INLINE) {
+        return focusInlineFilter.call(this, focusOptions);
+    }
 
-	return focusPopperFilter.call(this, focusOptions);
+    return focusPopperFilter.call(this, focusOptions);
 }
 
 /**
@@ -1962,39 +1970,40 @@ function focusFilter(focusOptions) {
  * @throws {Error} unsupported type
  */
 function gatherState() {
-	const type = this.getOption("type");
-	if (["radio", "checkbox"].indexOf(type) === -1) {
-		throw new Error("unsupported type");
-	}
-
-	if (!this.shadowRoot) {
-		throw new Error("no shadow-root is defined");
-	}
-
-	const selection = [];
-	const elements = this.shadowRoot.querySelectorAll(
-		`input[type=${type}]:checked`,
-	);
-
-	for (const e of elements) {
-		selection.push({
-			label: getSelectionLabel.call(this, e.value),
-			value: e.value,
-		});
-	}
-
-	setSelection
-		.call(this, selection)
-		.then(() => {})
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
-
-	if (this.getOption("features.closeOnSelect") === true) {
-		toggle.call(this);
-	}
-
-	return this;
+    const type = this.getOption("type");
+    if (["radio", "checkbox"].indexOf(type) === -1) {
+        throw new Error("unsupported type");
+    }
+
+    if (!this.shadowRoot) {
+        throw new Error("no shadow-root is defined");
+    }
+
+    const selection = [];
+    const elements = this.shadowRoot.querySelectorAll(
+        `input[type=${type}]:checked`,
+    );
+
+    for (const e of elements) {
+        selection.push({
+            label: getSelectionLabel.call(this, e.value),
+            value: e.value,
+        });
+    }
+
+    setSelection
+        .call(this, selection)
+        .then(() => {
+        })
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
+
+    if (this.getOption("features.closeOnSelect") === true) {
+        toggle.call(this);
+    }
+
+    return this;
 }
 
 /**
@@ -2003,120 +2012,121 @@ function gatherState() {
  * @throws {Error} unsupported type
  */
 function clearSelection() {
-	const type = this.getOption("type");
-	if (["radio", "checkbox"].indexOf(type) === -1) {
-		throw new Error("unsupported type");
-	}
-
-	if (!this.shadowRoot) {
-		throw new Error("no shadow-root is defined");
-	}
-
-	setSelection
-		.call(this, [])
-		.then(() => {})
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
+    const type = this.getOption("type");
+    if (["radio", "checkbox"].indexOf(type) === -1) {
+        throw new Error("unsupported type");
+    }
+
+    if (!this.shadowRoot) {
+        throw new Error("no shadow-root is defined");
+    }
+
+    setSelection
+        .call(this, [])
+        .then(() => {
+        })
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
 }
 
 /**
  * @private
  */
 function areOptionsAvailableAndInit() {
-	// prevent multiple calls
-	if (this[areOptionsAvailableAndInitSymbol] === undefined) {
-		this[areOptionsAvailableAndInitSymbol] = 0;
-	}
-
-	if (this[areOptionsAvailableAndInitSymbol] > 0) {
-		this[areOptionsAvailableAndInitSymbol]--;
-		return true;
-	}
-
-	this[areOptionsAvailableAndInitSymbol]++;
-
-	const options = this.getOption("options");
-
-	if (
-		options === undefined ||
-		options === null ||
-		(isArray(options) && options.length === 0)
-	) {
-		setStatusOrRemoveBadges.call(this, "empty");
-
-		// hide.call(this);
-
-		let msg = this.getOption("labels.no-options-available");
-
-		if (
-			this.getOption("url") !== null &&
-			this.getOption("features.lazyLoad") === true &&
-			this[lazyLoadDoneSymbol] !== true
-		) {
-			msg = this.getOption("labels.click-to-load-options");
-		}
-
-		this.setOption("messages.control", msg);
-		this.setOption("messages.summary", "");
-
-		if (this.getOption("features.emptyValueIfNoOptions") === true) {
-			this.value = "";
-		}
-		addErrorAttribute(this, "No options available.");
-		return false;
-	}
-
-	const selections = this.getOption("selection");
-	if (
-		selections === undefined ||
-		selections === null ||
-		selections.length === 0
-	) {
-		this.setOption(
-			"messages.control",
-			this.getOption("labels.select-an-option"),
-		);
-	} else {
-		this.setOption("messages.control", "");
-	}
-
-	this.setOption("messages.summary", setSummaryAndControlText.call(this));
-
-	let updated = false;
-	let valueCounter = 1;
-	for (const option of options) {
-		if (option?.visibility === undefined) {
-			option.visibility = "visible";
-			updated = true;
-		}
-
-		if (option?.value === undefined && option?.label === undefined) {
-			option.value = `${valueCounter++}`;
-			option.label = option.value;
-			updated = true;
-			continue;
-		}
-
-		if (option?.value === undefined) {
-			option.value = option.label;
-			updated = true;
-		}
-
-		if (option?.label === undefined) {
-			option.label = option.value;
-			updated = true;
-		}
-	}
-
-	if (updated) {
-		this.setOption("options", options);
-	}
-
-	setStatusOrRemoveBadges.call(this);
-
-	removeErrorAttribute(this, "No options available.");
-	return true;
+    // prevent multiple calls
+    if (this[areOptionsAvailableAndInitSymbol] === undefined) {
+        this[areOptionsAvailableAndInitSymbol] = 0;
+    }
+
+    if (this[areOptionsAvailableAndInitSymbol] > 0) {
+        this[areOptionsAvailableAndInitSymbol]--;
+        return true;
+    }
+
+    this[areOptionsAvailableAndInitSymbol]++;
+
+    const options = this.getOption("options");
+
+    if (
+        options === undefined ||
+        options === null ||
+        (isArray(options) && options.length === 0)
+    ) {
+        setStatusOrRemoveBadges.call(this, "empty");
+
+        // hide.call(this);
+
+        let msg = this.getOption("labels.no-options-available");
+
+        if (
+            this.getOption("url") !== null &&
+            this.getOption("features.lazyLoad") === true &&
+            this[lazyLoadDoneSymbol] !== true
+        ) {
+            msg = this.getOption("labels.click-to-load-options");
+        }
+
+        this.setOption("messages.control", msg);
+        this.setOption("messages.summary", "");
+
+        if (this.getOption("features.emptyValueIfNoOptions") === true) {
+            this.value = "";
+        }
+        addErrorAttribute(this, "No options available.");
+        return false;
+    }
+
+    const selections = this.getOption("selection");
+    if (
+        selections === undefined ||
+        selections === null ||
+        selections.length === 0
+    ) {
+        this.setOption(
+            "messages.control",
+            this.getOption("labels.select-an-option"),
+        );
+    } else {
+        this.setOption("messages.control", "");
+    }
+
+    this.setOption("messages.summary", setSummaryAndControlText.call(this));
+
+    let updated = false;
+    let valueCounter = 1;
+    for (const option of options) {
+        if (option?.visibility === undefined) {
+            option.visibility = "visible";
+            updated = true;
+        }
+
+        if (option?.value === undefined && option?.label === undefined) {
+            option.value = `${valueCounter++}`;
+            option.label = option.value;
+            updated = true;
+            continue;
+        }
+
+        if (option?.value === undefined) {
+            option.value = option.label;
+            updated = true;
+        }
+
+        if (option?.label === undefined) {
+            option.label = option.value;
+            updated = true;
+        }
+    }
+
+    if (updated) {
+        this.setOption("options", options);
+    }
+
+    setStatusOrRemoveBadges.call(this);
+
+    removeErrorAttribute(this, "No options available.");
+    return true;
 }
 
 /**
@@ -2124,30 +2134,30 @@ function areOptionsAvailableAndInit() {
  * @throws {Error} no shadow-root is defined
  */
 function checkOptionState() {
-	if (!this.shadowRoot) {
-		throw new Error("no shadow-root is defined");
-	}
-
-	const elements = this.shadowRoot.querySelectorAll(
-		`[${ATTRIBUTE_ROLE}=option] input`,
-	);
-
-	let selection = this.getOption("selection");
-	if (!isArray(selection)) {
-		selection = [];
-	}
-
-	const checkedValues = selection.map((a) => {
-		return a.value;
-	});
-
-	for (const e of elements) {
-		if (checkedValues.indexOf(e.value) !== -1) {
-			if (e.checked !== true) e.checked = true;
-		} else {
-			if (e.checked !== false) e.checked = false;
-		}
-	}
+    if (!this.shadowRoot) {
+        throw new Error("no shadow-root is defined");
+    }
+
+    const elements = this.shadowRoot.querySelectorAll(
+        `[${ATTRIBUTE_ROLE}=option] input`,
+    );
+
+    let selection = this.getOption("selection");
+    if (!isArray(selection)) {
+        selection = [];
+    }
+
+    const checkedValues = selection.map((a) => {
+        return a.value;
+    });
+
+    for (const e of elements) {
+        if (checkedValues.indexOf(e.value) !== -1) {
+            if (e.checked !== true) e.checked = true;
+        } else {
+            if (e.checked !== false) e.checked = false;
+        }
+    }
 }
 
 /**
@@ -2156,41 +2166,41 @@ function checkOptionState() {
  * @return {Object}
  */
 function convertValueToSelection(value) {
-	const selection = [];
-
-	if (isString(value)) {
-		value = value
-			.split(",")
-			.map((a) => {
-				return a.trim();
-			})
-			.filter((a) => {
-				return a !== "";
-			});
-	}
-
-	if (isString(value) || isInteger(value)) {
-		selection.push({
-			label: getSelectionLabel.call(this, value),
-			value: value,
-		});
-	} else if (isArray(value)) {
-		for (const v of value) {
-			selection.push({
-				label: getSelectionLabel.call(this, v),
-				value: v,
-			});
-		}
-
-		value = value.join(",");
-	} else {
-		throw new Error("unsupported type");
-	}
-
-	return {
-		selection: selection,
-		value: value,
-	};
+    const selection = [];
+
+    if (isString(value)) {
+        value = value
+            .split(",")
+            .map((a) => {
+                return a.trim();
+            })
+            .filter((a) => {
+                return a !== "";
+            });
+    }
+
+    if (isString(value) || isInteger(value)) {
+        selection.push({
+            label: getSelectionLabel.call(this, value),
+            value: value,
+        });
+    } else if (isArray(value)) {
+        for (const v of value) {
+            selection.push({
+                label: getSelectionLabel.call(this, v),
+                value: v,
+            });
+        }
+
+        value = value.join(",");
+    } else {
+        throw new Error("unsupported type");
+    }
+
+    return {
+        selection: selection,
+        value: value,
+    };
 }
 
 /**
@@ -2199,25 +2209,25 @@ function convertValueToSelection(value) {
  * @return {string}
  */
 function convertSelectionToValue(selection) {
-	const value = [];
-
-	if (isArray(selection)) {
-		for (const obj of selection) {
-			const v = obj?.["value"];
-			if (v !== undefined) value.push(`${v}`);
-		}
-	}
-
-	if (value.length === 0) {
-		return "";
-	} else if (value.length === 1) {
-		const v = value.pop();
-		if (v === undefined) return "";
-		if (v === null) return "";
-		return `${v}`;
-	}
-
-	return value.join(",");
+    const value = [];
+
+    if (isArray(selection)) {
+        for (const obj of selection) {
+            const v = obj?.["value"];
+            if (v !== undefined) value.push(`${v}`);
+        }
+    }
+
+    if (value.length === 0) {
+        return "";
+    } else if (value.length === 1) {
+        const v = value.pop();
+        if (v === undefined) return "";
+        if (v === null) return "";
+        return `${v}`;
+    }
+
+    return value.join(",");
 }
 
 /**
@@ -2227,76 +2237,76 @@ function convertSelectionToValue(selection) {
  * @throws {Error} no shadow-root is defined
  */
 function setSelection(selection) {
-	if (isString(selection) || isInteger(selection)) {
-		const result = convertValueToSelection.call(this, selection);
-		selection = result?.selection;
-	} else if (selection === undefined || selection === null) {
-		selection = [];
-	}
-
-	validateArray(selection);
-
-	for (let i = 0; i < selection.length; i++) {
-		let l = getSelectionLabel.call(this, selection[i].value);
-		if (l === selection[i].value) {
-			l = selection[i].label;
-		}
-
-		selection[i] = {
-			label: l,
-			value: selection[i].value,
-		};
-	}
-
-	this.setOption("selection", selection);
-	checkOptionState.call(this);
-	setSummaryAndControlText.call(this);
-
-	try {
-		this?.setFormValue(this.value);
-	} catch (e) {
-		addErrorAttribute(this, e);
-	}
-
-	fireCustomEvent(this, "monster-selected", {
-		selection,
-	});
-
-	fireEvent(this, "change");
-
-	return new Processing(() => {
-		const CLASSNAME = "selected";
-
-		if (!this.shadowRoot) {
-			throw new Error("no shadow-root is defined");
-		}
-
-		const notSelected = this.shadowRoot.querySelectorAll(":not(:checked)");
-
-		if (notSelected) {
-			notSelected.forEach((node) => {
-				const parent = node.closest(`[${ATTRIBUTE_ROLE}=option]`);
-				if (parent) {
-					parent.classList.remove(CLASSNAME);
-				}
-			});
-		}
-
-		const selected = this.shadowRoot.querySelectorAll(":checked");
-
-		if (selected) {
-			selected.forEach((node) => {
-				const parent = node.closest(`[${ATTRIBUTE_ROLE}=option]`);
-				if (parent) {
-					parent.classList.add(CLASSNAME);
-				}
-			});
-		}
-	})
-		.run()
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
+    if (isString(selection) || isInteger(selection)) {
+        const result = convertValueToSelection.call(this, selection);
+        selection = result?.selection;
+    } else if (selection === undefined || selection === null) {
+        selection = [];
+    }
+
+    validateArray(selection);
+
+    for (let i = 0; i < selection.length; i++) {
+        let l = getSelectionLabel.call(this, selection[i].value);
+        if (l === selection[i].value) {
+            l = selection[i].label;
+        }
+
+        selection[i] = {
+            label: l,
+            value: selection[i].value,
+        };
+    }
+
+    this.setOption("selection", selection);
+    checkOptionState.call(this);
+    setSummaryAndControlText.call(this);
+
+    try {
+        this?.setFormValue(this.value);
+    } catch (e) {
+        addErrorAttribute(this, e);
+    }
+
+    fireCustomEvent(this, "monster-selected", {
+        selection,
+    });
+
+    fireEvent(this, "change");
+
+    return new Processing(() => {
+        const CLASSNAME = "selected";
+
+        if (!this.shadowRoot) {
+            throw new Error("no shadow-root is defined");
+        }
+
+        const notSelected = this.shadowRoot.querySelectorAll(":not(:checked)");
+
+        if (notSelected) {
+            notSelected.forEach((node) => {
+                const parent = node.closest(`[${ATTRIBUTE_ROLE}=option]`);
+                if (parent) {
+                    parent.classList.remove(CLASSNAME);
+                }
+            });
+        }
+
+        const selected = this.shadowRoot.querySelectorAll(":checked");
+
+        if (selected) {
+            selected.forEach((node) => {
+                const parent = node.closest(`[${ATTRIBUTE_ROLE}=option]`);
+                if (parent) {
+                    parent.classList.add(CLASSNAME);
+                }
+            });
+        }
+    })
+        .run()
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
 }
 
 /**
@@ -2307,139 +2317,139 @@ function setSelection(selection) {
  * @throws {TypeError} unsupported response
  */
 function fetchData(url) {
-	const self = this;
-	if (!url) url = this.getOption("url");
-	if (!url) return Promise.resolve();
-
-	const fetchOptions = this.getOption("fetch", {});
-
-	let delayWatch = false;
-
-	// if fetch short time, do not show loading badge, because of flickering
-	requestAnimationFrame(() => {
-		if (delayWatch === true) return;
-		setStatusOrRemoveBadges.call(this, "loading");
-		delayWatch = true;
-	});
-
-	url = formatURL.call(this, url);
-
-	self[isLoadingSymbol] = true;
-	const global = getGlobal();
-	return global
-		.fetch(url, fetchOptions)
-		.then((response) => {
-			self[isLoadingSymbol] = false;
-			delayWatch = true;
-			const contentType = response.headers.get("content-type");
-			if (contentType && contentType.indexOf("application/json") !== -1) {
-				return response.text();
-			}
-
-			throw new TypeError(`unsupported response ${contentType}`);
-		})
-		.then((text) => {
-			try {
-				return Promise.resolve(JSON.parse(String(text)));
-			} catch (e) {
-				throw new TypeError("the result cannot be parsed, check the URL");
-			}
-		})
-		.catch((e) => {
-			self[isLoadingSymbol] = false;
-			delayWatch = true;
-			throw e;
-		});
+    const self = this;
+    if (!url) url = this.getOption("url");
+    if (!url) return Promise.resolve();
+
+    const fetchOptions = this.getOption("fetch", {});
+
+    let delayWatch = false;
+
+    // if fetch short time, do not show loading badge, because of flickering
+    requestAnimationFrame(() => {
+        if (delayWatch === true) return;
+        setStatusOrRemoveBadges.call(this, "loading");
+        delayWatch = true;
+    });
+
+    url = formatURL.call(this, url);
+
+    self[isLoadingSymbol] = true;
+    const global = getGlobal();
+    return global
+        .fetch(url, fetchOptions)
+        .then((response) => {
+            self[isLoadingSymbol] = false;
+            delayWatch = true;
+            const contentType = response.headers.get("content-type");
+            if (contentType && contentType.indexOf("application/json") !== -1) {
+                return response.text();
+            }
+
+            throw new TypeError(`unsupported response ${contentType}`);
+        })
+        .then((text) => {
+            try {
+                return Promise.resolve(JSON.parse(String(text)));
+            } catch (e) {
+                throw new TypeError("the result cannot be parsed, check the URL");
+            }
+        })
+        .catch((e) => {
+            self[isLoadingSymbol] = false;
+            delayWatch = true;
+            throw e;
+        });
 }
 
 /**
  * @private
  */
 function hide() {
-	this[popperElementSymbol].style.display = "none";
-	setStatusOrRemoveBadges.call(this, "closed");
-	removeAttributeToken(this[controlElementSymbol], "class", "open");
+    this[popperElementSymbol].style.display = "none";
+    setStatusOrRemoveBadges.call(this, "closed");
+    removeAttributeToken(this[controlElementSymbol], "class", "open");
 }
 
 /**
  * @private
  */
 function show() {
-	if (this.getOption("disabled", undefined) === true) {
-		return;
-	}
-
-	if (this[popperElementSymbol].style.display === STYLE_DISPLAY_MODE_BLOCK) {
-		return;
-	}
-
-	focusFilter.call(this);
-
-	const lazyLoadFlag =
-		this.getOption("features.lazyLoad") && this[lazyLoadDoneSymbol] !== true;
-
-	if (lazyLoadFlag === true) {
-		this[lazyLoadDoneSymbol] = true;
-		setStatusOrRemoveBadges.call(this, "loading");
-
-		new Processing(200, () => {
-			this.fetch()
-				.then(() => {
-					checkOptionState.call(this);
-					requestAnimationFrame(() => {
-						show.call(this);
-					});
-				})
-				.catch((e) => {
-					addErrorAttribute(this, e);
-					setStatusOrRemoveBadges.call(this, "error");
-				});
-		})
-			.run()
-			.catch((e) => {
-				addErrorAttribute(this, e);
-				setStatusOrRemoveBadges.call(this, "error");
-			});
-
-		return;
-	}
-
-	const hasPopperFilterFlag =
-		this.getOption("filter.position") === FILTER_POSITION_POPPER &&
-		getFilterMode.call(this) !== FILTER_MODE_DISABLED;
-
-	const options = getOptionElements.call(this);
-	if (options.length === 0 && hasPopperFilterFlag === false) {
-		return;
-	}
-
-	this[popperElementSymbol].style.visibility = "hidden";
-	this[popperElementSymbol].style.display = STYLE_DISPLAY_MODE_BLOCK;
-	setStatusOrRemoveBadges.call(this, "open");
-
-	addAttributeToken(this[controlElementSymbol], "class", "open");
-
-	new Processing(() => {
-		calcAndSetOptionsDimension.call(this);
-		focusFilter.call(this);
-		this[popperElementSymbol].style.removeProperty("visibility");
-		updatePopper.call(this);
-	})
-		.run()
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
+    if (this.getOption("disabled", undefined) === true) {
+        return;
+    }
+
+    if (this[popperElementSymbol].style.display === STYLE_DISPLAY_MODE_BLOCK) {
+        return;
+    }
+
+    focusFilter.call(this);
+
+    const lazyLoadFlag =
+        this.getOption("features.lazyLoad") && this[lazyLoadDoneSymbol] !== true;
+
+    if (lazyLoadFlag === true) {
+        this[lazyLoadDoneSymbol] = true;
+        setStatusOrRemoveBadges.call(this, "loading");
+
+        new Processing(200, () => {
+            this.fetch()
+                .then(() => {
+                    checkOptionState.call(this);
+                    requestAnimationFrame(() => {
+                        show.call(this);
+                    });
+                })
+                .catch((e) => {
+                    addErrorAttribute(this, e);
+                    setStatusOrRemoveBadges.call(this, "error");
+                });
+        })
+            .run()
+            .catch((e) => {
+                addErrorAttribute(this, e);
+                setStatusOrRemoveBadges.call(this, "error");
+            });
+
+        return;
+    }
+
+    const hasPopperFilterFlag =
+        this.getOption("filter.position") === FILTER_POSITION_POPPER &&
+        getFilterMode.call(this) !== FILTER_MODE_DISABLED;
+
+    const options = getOptionElements.call(this);
+    if (options.length === 0 && hasPopperFilterFlag === false) {
+        return;
+    }
+
+    this[popperElementSymbol].style.visibility = "hidden";
+    this[popperElementSymbol].style.display = STYLE_DISPLAY_MODE_BLOCK;
+    setStatusOrRemoveBadges.call(this, "open");
+
+    addAttributeToken(this[controlElementSymbol], "class", "open");
+
+    new Processing(() => {
+        calcAndSetOptionsDimension.call(this);
+        focusFilter.call(this);
+        this[popperElementSymbol].style.removeProperty("visibility");
+        updatePopper.call(this);
+    })
+        .run()
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
 }
 
 /**
  * @private
  */
 function toggle() {
-	if (this[popperElementSymbol].style.display === STYLE_DISPLAY_MODE_BLOCK) {
-		hide.call(this);
-	} else {
-		show.call(this);
-	}
+    if (this[popperElementSymbol].style.display === STYLE_DISPLAY_MODE_BLOCK) {
+        hide.call(this);
+    } else {
+        show.call(this);
+    }
 }
 
 /**
@@ -2448,188 +2458,188 @@ function toggle() {
  * @fires monster-selection-cleared
  */
 function initEventHandler() {
-	const self = this;
-
-	/**
-	 * @param {Event} event
-	 */
-	self[clearOptionEventHandler] = (event) => {
-		const element = findTargetElementFromEvent(
-			event,
-			ATTRIBUTE_ROLE,
-			"remove-badge",
-		);
-
-		if (element instanceof HTMLElement) {
-			const badge = findClosestByAttribute(element, ATTRIBUTE_ROLE, "badge");
-			if (badge instanceof HTMLElement) {
-				const value = badge.getAttribute(`${ATTRIBUTE_PREFIX}value`);
-
-				let selection = self.getOption("selection");
-				selection = selection.filter((b) => {
-					return value !== b.value;
-				});
-
-				setSelection
-					.call(self, selection)
-					.then(() => {
-						fireCustomEvent(self, "monster-selection-removed", {
-							value,
-						});
-					})
-					.catch((e) => {
-						addErrorAttribute(self, e);
-					});
-			}
-		}
-	};
-
-	/**
-	 * @param {Event} event
-	 */
-	self[closeEventHandler] = (event) => {
-		const path = event.composedPath();
-
-		for (const [, element] of Object.entries(path)) {
-			if (element === self) {
-				return;
-			}
-		}
-		hide.call(self);
-	};
-
-	/**
-	 * @param {Event} event
-	 */
-	self[inputEventHandler] = (event) => {
-		const path = event.composedPath();
-		const element = path?.[0];
-
-		if (element instanceof HTMLElement) {
-			if (
-				element.hasAttribute(ATTRIBUTE_ROLE) &&
-				element.getAttribute(ATTRIBUTE_ROLE) === "option-control"
-			) {
-				fireCustomEvent(self, "monster-change", {
-					type: event.type,
-					value: element.value,
-					checked: element.checked,
-				});
-			} else if (
-				element.hasAttribute(ATTRIBUTE_ROLE) &&
-				element.getAttribute(ATTRIBUTE_ROLE) === "filter"
-			) {
-			}
-		}
-	};
-
-	/**
-	 * @param {Event} event
-	 */
-	self[changeEventHandler] = (event) => {
-		gatherState.call(self);
-		fireCustomEvent(self, "monster-changed", event?.detail);
-	};
-
-	self[keyEventHandler] = (event) => {
-		const path = event.composedPath();
-		const element = path.shift();
-
-		let role;
-
-		if (element instanceof HTMLElement) {
-			if (element.hasAttribute(ATTRIBUTE_ROLE)) {
-				role = element.getAttribute(ATTRIBUTE_ROLE);
-			} else if (element === this) {
-				show.call(this);
-				// focusFilter.call(self);
-			} else {
-				const e = element.closest(`[${ATTRIBUTE_ROLE}]`);
-				if (e instanceof HTMLElement && e.hasAttribute(ATTRIBUTE_ROLE)) {
-					role = e.getAttribute(ATTRIBUTE_ROLE);
-				}
-			}
-		} else {
-			return;
-		}
-
-		switch (role) {
-			case "filter":
-				handleFilterKeyboardEvents.call(self, event);
-				break;
-			case "option-label":
-			case "option-control":
-			case "option":
-				handleOptionKeyboardEvents.call(self, event);
-				break;
-			case "control":
-			case "toggle":
-				handleToggleKeyboardEvents.call(self, event);
-				break;
-		}
-	};
-
-	const types = self.getOption("toggleEventType", ["click"]);
-
-	for (const [, type] of Object.entries(types)) {
-		self[controlElementSymbol]
-			.querySelector(`[${ATTRIBUTE_ROLE}="container"]`)
-			.addEventListener(type, function (event) {
-				const element = findTargetElementFromEvent(
-					event,
-					ATTRIBUTE_ROLE,
-					"remove-badge",
-				);
-				if (element instanceof HTMLElement) {
-					return;
-				}
-
-				toggle.call(self);
-			});
-
-		self[controlElementSymbol]
-			.querySelector(`[${ATTRIBUTE_ROLE}="status-or-remove-badges"]`)
-			.addEventListener(type, function (event) {
-				if (self.getOption("disabled", undefined) === true) {
-					return;
-				}
-
-				const path = event.composedPath();
-				const element = path?.[0];
-				if (element instanceof HTMLElement) {
-					const control = element.closest(
-						`[${ATTRIBUTE_ROLE}="status-or-remove-badges"]`,
-					);
-					if (control instanceof HTMLElement) {
-						if (control.classList.contains("clear")) {
-							clearSelection.call(self);
-
-							fireCustomEvent(self, "monster-selection-cleared", {});
-						} else {
-							const element = findTargetElementFromEvent(
-								event,
-								ATTRIBUTE_ROLE,
-								"remove-badge",
-							);
-							if (element instanceof HTMLElement) {
-								return;
-							}
-
-							toggle.call(self);
-						}
-					}
-				}
-			});
-
-		// badge, selection
-		self.addEventListener(type, self[clearOptionEventHandler]);
-	}
-
-	self.addEventListener("monster-change", self[changeEventHandler]);
-	self.addEventListener("input", self[inputEventHandler]);
-	self.addEventListener("keydown", self[keyEventHandler]);
-
-	return self;
+    const self = this;
+
+    /**
+     * @param {Event} event
+     */
+    self[clearOptionEventHandler] = (event) => {
+        const element = findTargetElementFromEvent(
+            event,
+            ATTRIBUTE_ROLE,
+            "remove-badge",
+        );
+
+        if (element instanceof HTMLElement) {
+            const badge = findClosestByAttribute(element, ATTRIBUTE_ROLE, "badge");
+            if (badge instanceof HTMLElement) {
+                const value = badge.getAttribute(`${ATTRIBUTE_PREFIX}value`);
+
+                let selection = self.getOption("selection");
+                selection = selection.filter((b) => {
+                    return value !== b.value;
+                });
+
+                setSelection
+                    .call(self, selection)
+                    .then(() => {
+                        fireCustomEvent(self, "monster-selection-removed", {
+                            value,
+                        });
+                    })
+                    .catch((e) => {
+                        addErrorAttribute(self, e);
+                    });
+            }
+        }
+    };
+
+    /**
+     * @param {Event} event
+     */
+    self[closeEventHandler] = (event) => {
+        const path = event.composedPath();
+
+        for (const [, element] of Object.entries(path)) {
+            if (element === self) {
+                return;
+            }
+        }
+        hide.call(self);
+    };
+
+    /**
+     * @param {Event} event
+     */
+    self[inputEventHandler] = (event) => {
+        const path = event.composedPath();
+        const element = path?.[0];
+
+        if (element instanceof HTMLElement) {
+            if (
+                element.hasAttribute(ATTRIBUTE_ROLE) &&
+                element.getAttribute(ATTRIBUTE_ROLE) === "option-control"
+            ) {
+                fireCustomEvent(self, "monster-change", {
+                    type: event.type,
+                    value: element.value,
+                    checked: element.checked,
+                });
+            } else if (
+                element.hasAttribute(ATTRIBUTE_ROLE) &&
+                element.getAttribute(ATTRIBUTE_ROLE) === "filter"
+            ) {
+            }
+        }
+    };
+
+    /**
+     * @param {Event} event
+     */
+    self[changeEventHandler] = (event) => {
+        gatherState.call(self);
+        fireCustomEvent(self, "monster-changed", event?.detail);
+    };
+
+    self[keyEventHandler] = (event) => {
+        const path = event.composedPath();
+        const element = path.shift();
+
+        let role;
+
+        if (element instanceof HTMLElement) {
+            if (element.hasAttribute(ATTRIBUTE_ROLE)) {
+                role = element.getAttribute(ATTRIBUTE_ROLE);
+            } else if (element === this) {
+                show.call(this);
+                // focusFilter.call(self);
+            } else {
+                const e = element.closest(`[${ATTRIBUTE_ROLE}]`);
+                if (e instanceof HTMLElement && e.hasAttribute(ATTRIBUTE_ROLE)) {
+                    role = e.getAttribute(ATTRIBUTE_ROLE);
+                }
+            }
+        } else {
+            return;
+        }
+
+        switch (role) {
+            case "filter":
+                handleFilterKeyboardEvents.call(self, event);
+                break;
+            case "option-label":
+            case "option-control":
+            case "option":
+                handleOptionKeyboardEvents.call(self, event);
+                break;
+            case "control":
+            case "toggle":
+                handleToggleKeyboardEvents.call(self, event);
+                break;
+        }
+    };
+
+    const types = self.getOption("toggleEventType", ["click"]);
+
+    for (const [, type] of Object.entries(types)) {
+        self[controlElementSymbol]
+            .querySelector(`[${ATTRIBUTE_ROLE}="container"]`)
+            .addEventListener(type, function (event) {
+                const element = findTargetElementFromEvent(
+                    event,
+                    ATTRIBUTE_ROLE,
+                    "remove-badge",
+                );
+                if (element instanceof HTMLElement) {
+                    return;
+                }
+
+                toggle.call(self);
+            });
+
+        self[controlElementSymbol]
+            .querySelector(`[${ATTRIBUTE_ROLE}="status-or-remove-badges"]`)
+            .addEventListener(type, function (event) {
+                if (self.getOption("disabled", undefined) === true) {
+                    return;
+                }
+
+                const path = event.composedPath();
+                const element = path?.[0];
+                if (element instanceof HTMLElement) {
+                    const control = element.closest(
+                        `[${ATTRIBUTE_ROLE}="status-or-remove-badges"]`,
+                    );
+                    if (control instanceof HTMLElement) {
+                        if (control.classList.contains("clear")) {
+                            clearSelection.call(self);
+
+                            fireCustomEvent(self, "monster-selection-cleared", {});
+                        } else {
+                            const element = findTargetElementFromEvent(
+                                event,
+                                ATTRIBUTE_ROLE,
+                                "remove-badge",
+                            );
+                            if (element instanceof HTMLElement) {
+                                return;
+                            }
+
+                            toggle.call(self);
+                        }
+                    }
+                }
+            });
+
+        // badge, selection
+        self.addEventListener(type, self[clearOptionEventHandler]);
+    }
+
+    self.addEventListener("monster-change", self[changeEventHandler]);
+    self.addEventListener("input", self[inputEventHandler]);
+    self.addEventListener("keydown", self[keyEventHandler]);
+
+    return self;
 }
 
 /**
@@ -2637,70 +2647,70 @@ function initEventHandler() {
  * @return {Select}
  */
 function setStatusOrRemoveBadges(suggestion) {
-	requestAnimationFrame(() => {
-		const selection = this.getOption("selection");
-
-		const clearAllFlag =
-			isArray(selection) &&
-			selection.length > 0 &&
-			this.getOption("features.clearAll") === true;
-
-		const current = this.getOption("classes.statusOrRemoveBadge");
-
-		if (suggestion === "error") {
-			if (current !== "error") {
-				this.setOption("classes.statusOrRemoveBadge", "error");
-			}
-			return;
-		}
-
-		if (this[isLoadingSymbol] === true) {
-			if (current !== "loading") {
-				this.setOption("classes.statusOrRemoveBadge", "loading");
-			}
-			return;
-		}
-
-		if (suggestion === "loading") {
-			if (current !== "loading") {
-				this.setOption("classes.statusOrRemoveBadge", "loading");
-			}
-			return;
-		}
-
-		if (clearAllFlag) {
-			if (current !== "clear") {
-				this.setOption("classes.statusOrRemoveBadge", "clear");
-			}
-			return;
-		}
-
-		if (this[controlElementSymbol].classList.contains("open")) {
-			if (current !== "open") {
-				this.setOption("classes.statusOrRemoveBadge", "open");
-			}
-			return;
-		}
-
-		const options = this.getOption("options");
-		if (
-			options === undefined ||
-			options === null ||
-			(isArray(options) && options.length === 0)
-		) {
-			if (current !== "empty") {
-				this.setOption("classes.statusOrRemoveBadge", "empty");
-			}
-			return;
-		}
-
-		if (suggestion) {
-			if (current !== suggestion) {
-				this.setOption("classes.statusOrRemoveBadge", suggestion);
-			}
-			return;
-		}
-	});
+    requestAnimationFrame(() => {
+        const selection = this.getOption("selection");
+
+        const clearAllFlag =
+            isArray(selection) &&
+            selection.length > 0 &&
+            this.getOption("features.clearAll") === true;
+
+        const current = this.getOption("classes.statusOrRemoveBadge");
+
+        if (suggestion === "error") {
+            if (current !== "error") {
+                this.setOption("classes.statusOrRemoveBadge", "error");
+            }
+            return;
+        }
+
+        if (this[isLoadingSymbol] === true) {
+            if (current !== "loading") {
+                this.setOption("classes.statusOrRemoveBadge", "loading");
+            }
+            return;
+        }
+
+        if (suggestion === "loading") {
+            if (current !== "loading") {
+                this.setOption("classes.statusOrRemoveBadge", "loading");
+            }
+            return;
+        }
+
+        if (clearAllFlag) {
+            if (current !== "clear") {
+                this.setOption("classes.statusOrRemoveBadge", "clear");
+            }
+            return;
+        }
+
+        if (this[controlElementSymbol].classList.contains("open")) {
+            if (current !== "open") {
+                this.setOption("classes.statusOrRemoveBadge", "open");
+            }
+            return;
+        }
+
+        const options = this.getOption("options");
+        if (
+            options === undefined ||
+            options === null ||
+            (isArray(options) && options.length === 0)
+        ) {
+            if (current !== "empty") {
+                this.setOption("classes.statusOrRemoveBadge", "empty");
+            }
+            return;
+        }
+
+        if (suggestion) {
+            if (current !== suggestion) {
+                this.setOption("classes.statusOrRemoveBadge", suggestion);
+            }
+            return;
+        }
+    });
 }
 
 /**
@@ -2709,68 +2719,68 @@ function setStatusOrRemoveBadges(suggestion) {
  * @throws {Error} no shadow-root is defined
  */
 function initControlReferences() {
-	if (!this.shadowRoot) {
-		throw new Error("no shadow-root is defined");
-	}
-
-	this[controlElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=control]`,
-	);
-	this[selectionElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=selection]`,
-	);
-	this[containerElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=container]`,
-	);
-	this[popperElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=popper]`,
-	);
-	this[inlineFilterElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=filter][name="inline-filter"]`,
-	);
-	this[popperFilterElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=filter][name="popper-filter"]`,
-	);
-	this[popperFilterContainerElementSymbol] =
-		this[popperFilterElementSymbol].parentElement;
-	this[optionsElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=options]`,
-	);
-	this[noOptionsAvailableElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}="no-options"]`,
-	);
-	this[statusOrRemoveBadgesElementSymbol] = this.shadowRoot.querySelector(
-		`[${ATTRIBUTE_ROLE}=status-or-remove-badges]`,
-	);
+    if (!this.shadowRoot) {
+        throw new Error("no shadow-root is defined");
+    }
+
+    this[controlElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=control]`,
+    );
+    this[selectionElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=selection]`,
+    );
+    this[containerElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=container]`,
+    );
+    this[popperElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=popper]`,
+    );
+    this[inlineFilterElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=filter][name="inline-filter"]`,
+    );
+    this[popperFilterElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=filter][name="popper-filter"]`,
+    );
+    this[popperFilterContainerElementSymbol] =
+        this[popperFilterElementSymbol].parentElement;
+    this[optionsElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=options]`,
+    );
+    this[noOptionsAvailableElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}="no-options"]`,
+    );
+    this[statusOrRemoveBadgesElementSymbol] = this.shadowRoot.querySelector(
+        `[${ATTRIBUTE_ROLE}=status-or-remove-badges]`,
+    );
 }
 
 /**
  * @private
  */
 function updatePopper() {
-	if (this[popperElementSymbol].style.display !== STYLE_DISPLAY_MODE_BLOCK) {
-		return;
-	}
-
-	if (this.getOption("disabled", false) === true) {
-		return;
-	}
-
-	new Processing(() => {
-		calcAndSetOptionsDimension.call(this);
-		positionPopper.call(
-			this,
-			this[controlElementSymbol],
-			this[popperElementSymbol],
-			this.getOption("popper", {}),
-		);
-	})
-		.run()
-		.catch((e) => {
-			addErrorAttribute(this, e);
-		});
-
-	return this;
+    if (this[popperElementSymbol].style.display !== STYLE_DISPLAY_MODE_BLOCK) {
+        return;
+    }
+
+    if (this.getOption("disabled", false) === true) {
+        return;
+    }
+
+    new Processing(() => {
+        calcAndSetOptionsDimension.call(this);
+        positionPopper.call(
+            this,
+            this[controlElementSymbol],
+            this[popperElementSymbol],
+            this.getOption("popper", {}),
+        );
+    })
+        .run()
+        .catch((e) => {
+            addErrorAttribute(this, e);
+        });
+
+    return this;
 }
 
 /**
@@ -2778,8 +2788,8 @@ function updatePopper() {
  * @return {string}
  */
 function getTemplate() {
-	// language=HTML
-	return `
+    // language=HTML
+    return `
         <template id="options">
             <div data-monster-role="option" tabindex="-1"
                  data-monster-attributes="