diff --git a/source/components/datatable/save-button.mjs b/source/components/datatable/save-button.mjs
index a1188237f55fa4aa848a307dc3d76ca3c2cce9ee..4bc5d7736f3aac9c3b4a373202db3dc6c24b262d 100644
--- a/source/components/datatable/save-button.mjs
+++ b/source/components/datatable/save-button.mjs
@@ -199,6 +199,7 @@ class SaveButton extends CustomElement {
 					const ignoreChanges = self.getOption("ignoreChanges");
 
 					const result = diff(self[originValuesSymbol], currentValues);
+
 					if (isArray(ignoreChanges) && ignoreChanges.length > 0) {
 						const itemsToRemove = [];
 						for (const item of result) {
diff --git a/source/components/form/select.mjs b/source/components/form/select.mjs
index 0a4871ecde805eedafc60b54d611a403d3d70a60..657a3821d38361a88970d97aa0b2fc161f1a3341 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",
 );
 
 /**
@@ -283,498 +283,498 @@ 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) {
-		let ignoreValues = this.getOption("ignoreValues", []);
-		if (!isArray(ignoreValues)) {
-			ignoreValues = [];
-		}
-
-		for (const v of ignoreValues) {
-			if (value === v) {
-				return;
-			}
-		}
-
-		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 {Array} ignoreValues Ignore values in the selection and value
-	 * @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,
-				},
-				ignoreValues: [undefined, 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, () => {
-				const oldValue = self.value;
-				const newValue = self.getAttribute("value");
-				if (oldValue !== newValue) {
-					self.value = newValue;
-				}
-			})
-				.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];
-	}
+    /**
+     *
+     */
+    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} empty
+     * @property {String} empty.defaultValueRadio Default value if you use radio buttons
+     * @property {Array} empty.defaultValueCheckbox Default value if you use checkboxes
+     * @property {Array} empty.equivalents Equivalents for empty values
+     * @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,
+                },
+                empty: {
+                    defaultValueRadio: "",
+                    defaultValueCheckbox: [],
+                    equivalents: [undefined, null, "", NaN],
+                },
+                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, () => {
+                const oldValue = self.value;
+                const newValue = self.getAttribute("value");
+                if (oldValue !== newValue) {
+                    self.value = newValue;
+                }
+            })
+                .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);
+                });
+            }
+        }
+
+        setTimeout(() => {
+            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);
+        },0);
+
+        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];
+    }
 }
 
 /**
@@ -782,285 +782,286 @@ 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);
+            });
+    });
 }
 
 /**
@@ -1075,68 +1076,68 @@ 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];
-			}
-		}
-
-		this[timerCallbackSymbol] = new DeadMansSwitch(200, () => {
-			updatePopper.call(this);
-			delete this[timerCallbackSymbol];
-		});
-	});
-
-	requestAnimationFrame(() => {
-		let parent = this.parentNode;
-		while (!(parent instanceof HTMLElement) && parent !== null) {
-			parent = parent.parentNode;
-		}
-
-		if (parent instanceof HTMLElement) {
-			this[resizeObserverSymbol].observe(parent);
-		}
-	});
+    // 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];
+        });
+    });
+
+
+        let parent = this.parentNode;
+        while (!(parent instanceof HTMLElement) && parent !== null) {
+            parent = parent.parentNode;
+        }
+
+        if (parent instanceof HTMLElement) {
+            this[resizeObserverSymbol].observe(parent);
+        }
+
 }
 
 /**
  * @private
  */
 function disconnectResizeObserver() {
-	if (this[resizeObserverSymbol] instanceof ResizeObserver) {
-		this[resizeObserverSymbol].disconnect();
-	}
+    if (this[resizeObserverSymbol] instanceof ResizeObserver) {
+        this[resizeObserverSymbol].disconnect();
+    }
 }
 
 /**
@@ -1144,7 +1145,7 @@ 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"
@@ -1160,7 +1161,7 @@ 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"
@@ -1176,35 +1177,35 @@ 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);
 }
 
 /**
@@ -1214,39 +1215,39 @@ 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,
+    });
 }
 
 /**
@@ -1255,38 +1256,38 @@ 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;
 }
 
 /**
@@ -1296,17 +1297,17 @@ 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);
 }
 
 /**
@@ -1314,25 +1315,25 @@ 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;
+    }
 }
 
 /**
@@ -1342,32 +1343,28 @@ 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);
+                        setStatusOrRemoveBadges.call(self, "error");
+                }
+                try {
+                    areOptionsAvailableAndInit.call(self);
+                } catch (e) {
+                    addErrorAttribute(self, e);
+                        setStatusOrRemoveBadges.call(self, "error");
+                }
+
+                setSummaryAndControlText.call(self);
+            }).run();
+        }),
+    );
 }
 
 /**
@@ -1375,16 +1372,17 @@ 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;
 }
 
 /**
@@ -1392,36 +1390,36 @@ 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", "");
+        }
+    }
 }
 
 /**
@@ -1429,9 +1427,9 @@ function setSummaryAndControlText() {
  * @return {NodeList}
  */
 function getOptionElements() {
-	return this[optionsElementSymbol].querySelectorAll(
-		`[${ATTRIBUTE_ROLE}=option]`,
-	);
+    return this[optionsElementSymbol].querySelectorAll(
+        `[${ATTRIBUTE_ROLE}=option]`,
+    );
 }
 
 /**
@@ -1455,75 +1453,75 @@ 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";
 }
 
 /**
@@ -1532,126 +1530,126 @@ 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);
+        });
 }
 
 /**
@@ -1659,37 +1657,37 @@ 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);
+    }
 }
 
 /**
@@ -1703,86 +1701,86 @@ 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);
 }
 
 /**
@@ -1792,28 +1790,28 @@ 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;
+        });
 }
 
 /**
@@ -1821,50 +1819,50 @@ 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;
+    }
 }
 
 /**
@@ -1872,33 +1870,33 @@ 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();
 }
 
 /**
@@ -1906,25 +1904,25 @@ 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);
 }
 
 /**
@@ -1932,44 +1930,44 @@ 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);
 }
 
 /**
@@ -1979,39 +1977,40 @@ 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;
 }
 
 /**
@@ -2020,120 +2019,121 @@ 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;
 }
 
 /**
@@ -2141,30 +2141,30 @@ 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;
+        }
+    }
 }
 
 /**
@@ -2173,41 +2173,41 @@ 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,
+    };
 }
 
 /**
@@ -2216,123 +2216,151 @@ 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(",");
 }
 
 /**
  * @private
- * @param {array|string} selection
- * @return {Promise}
- * @throws {Error} no shadow-root is defined
+ * @param value
+ * @returns {boolean}
+ */
+function isValueIsEmpty(value) {
+    let equivalents = this.getOption("empty.equivalents");
+    if (!isArray(equivalents)) {
+        if (equivalents === undefined) {
+        return false;
+       }
+        equivalents = [equivalents];
+    }
+
+    return equivalents.indexOf(value) !== -1;
+
+}
+
+/**
+ * @private
+ * @param value
+ * @returns {*}
+ */
+function isValueIsEmptyThenGetNormalize(value) {
+    let emptyDefault = null
+    if (this.getOption("type")==="checkbox") {
+        emptyDefault = this.getOption("empty.defaultValueCheckbox");
+    } else {
+        emptyDefault = this.getOption("empty.defaultValueRadio");
+    }
+
+    if (isValueIsEmpty.call(this,value)) {
+        return emptyDefault;
+    }
+
+    return value;
+
+}
+
+/**
+ * @private
+ * @param selection
+ * @returns {Promise<unknown | void>}
  */
 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);
-	let ignoreValues = this.getOption("ignoreValues", []);
-	if (!isArray(ignoreValues)) {
-		ignoreValues = [];
-	}
-
-	let resultSelection = [];
-	for (let i = 0; i < selection.length; i++) {
-		let ignore = false;
-
-		for (const v of ignoreValues) {
-			if (selection[i].value === v) {
-				ignore = true;
-				break;
-			}
-		}
-		if (ignore) {
-			continue;
-		}
-
-		let l = getSelectionLabel.call(this, selection[i].value);
-		if (l === selection[i].value) {
-			l = selection[i].label;
-		}
-
-		resultSelection.push({
-			label: l,
-			value: selection[i].value,
-		});
-	}
-
-	selection = resultSelection;
-
-	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"); // https://gitlab.schukai.com/oss/libraries/javascript/monster/-/issues/291
-
-	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;
+    }
+
+    selection = isValueIsEmptyThenGetNormalize.call(this,selection);
+    validateArray(selection);
+
+    let resultSelection = [];
+    for (let i = 0; i < selection.length; i++) {
+
+        if(isValueIsEmpty.call(this,selection[i].value)) {
+            continue
+        }
+
+        let l = getSelectionLabel.call(this, selection[i].value);
+        if (l === selection[i].value) {
+            l = selection[i].label;
+        }
+
+        resultSelection.push({
+            label: l,
+            value: selection[i].value,
+        });
+    }
+
+    selection = resultSelection;
+
+    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"); // https://gitlab.schukai.com/oss/libraries/javascript/monster/-/issues/291
+
+    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);
+        });
 }
 
 /**
@@ -2343,139 +2371,139 @@ 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);
+    }
 }
 
 /**
@@ -2484,188 +2512,188 @@ 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;
 }
 
 /**
@@ -2673,70 +2701,70 @@ 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;
+        }
+    });
 }
 
 /**
@@ -2745,68 +2773,68 @@ 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;
 }
 
 /**
@@ -2814,8 +2842,8 @@ 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="
diff --git a/source/dom/updater.mjs b/source/dom/updater.mjs
index 5f94b079f45f2dfaafee6bc9d611c629e2154dff..693cf5487e4c4a061d5e435284d72f2ee364f19e 100644
--- a/source/dom/updater.mjs
+++ b/source/dom/updater.mjs
@@ -12,39 +12,49 @@
  * SPDX-License-Identifier: AGPL-3.0
  */
 
-import { internalSymbol } from "../constants.mjs";
-import { diff } from "../data/diff.mjs";
-import { Pathfinder } from "../data/pathfinder.mjs";
-import { Pipe } from "../data/pipe.mjs";
+import {internalSymbol} from "../constants.mjs";
+import {diff} from "../data/diff.mjs";
+import {Pathfinder} from "../data/pathfinder.mjs";
+import {Pipe} from "../data/pipe.mjs";
 import {
-	ATTRIBUTE_ERRORMESSAGE,
-	ATTRIBUTE_UPDATER_ATTRIBUTES,
-	ATTRIBUTE_UPDATER_BIND,
-	ATTRIBUTE_UPDATER_BIND_TYPE,
-	ATTRIBUTE_UPDATER_INSERT,
-	ATTRIBUTE_UPDATER_INSERT_REFERENCE,
-	ATTRIBUTE_UPDATER_REMOVE,
-	ATTRIBUTE_UPDATER_REPLACE,
-	ATTRIBUTE_UPDATER_SELECT_THIS,
+    ATTRIBUTE_ERRORMESSAGE,
+    ATTRIBUTE_UPDATER_ATTRIBUTES,
+    ATTRIBUTE_UPDATER_BIND,
+    ATTRIBUTE_UPDATER_BIND_TYPE,
+    ATTRIBUTE_UPDATER_INSERT,
+    ATTRIBUTE_UPDATER_INSERT_REFERENCE,
+    ATTRIBUTE_UPDATER_REMOVE,
+    ATTRIBUTE_UPDATER_REPLACE,
+    ATTRIBUTE_UPDATER_SELECT_THIS,
 } from "./constants.mjs";
 
-import { Base } from "../types/base.mjs";
-import { isArray, isString, isInstance, isIterable } from "../types/is.mjs";
-import { Observer } from "../types/observer.mjs";
-import { ProxyObserver } from "../types/proxyobserver.mjs";
-import { validateArray, validateInstance } from "../types/validate.mjs";
-import { clone } from "../util/clone.mjs";
-import { trimSpaces } from "../util/trimspaces.mjs";
-import { addAttributeToken, addToObjectLink } from "./attributes.mjs";
+import {Base} from "../types/base.mjs";
+import {isArray, isInteger, isString, isInstance, isIterable} from "../types/is.mjs";
+import {Observer} from "../types/observer.mjs";
+import {ProxyObserver} from "../types/proxyobserver.mjs";
+import {validateArray, validateInstance} from "../types/validate.mjs";
+import {clone} from "../util/clone.mjs";
+import {trimSpaces} from "../util/trimspaces.mjs";
+import {addAttributeToken, addToObjectLink} from "./attributes.mjs";
 import {
-	CustomElement,
-	updaterTransformerMethodsSymbol,
+    CustomElement,
+    updaterTransformerMethodsSymbol,
 } from "./customelement.mjs";
-import { findTargetElementFromEvent } from "./events.mjs";
-import { findDocumentTemplate } from "./template.mjs";
-import { getWindow } from "./util.mjs";
+import {findTargetElementFromEvent} from "./events.mjs";
+import {findDocumentTemplate} from "./template.mjs";
+import {getWindow} from "./util.mjs";
+import {DeadMansSwitch} from "../util/deadmansswitch.mjs";
+import {addErrorAttribute, removeErrorAttribute} from "./error.mjs";
+
+
+export {Updater, addObjectWithUpdaterToElement};
 
-export { Updater, addObjectWithUpdaterToElement };
+
+/**
+ * @private
+ * @type {symbol}
+ */
+const timerElementEventHandlerSymbol = Symbol("timerElementEventHandler");
 
 /**
  * The updater class connects an object with the DOM. In this way, structures and contents in the DOM can be
@@ -71,190 +81,190 @@ export { Updater, addObjectWithUpdaterToElement };
  * @summary The updater class connects an object with the dom
  */
 class Updater extends Base {
-	/**
-	 * @since 1.8.0
-	 * @param {HTMLElement} element
-	 * @param {object|ProxyObserver|undefined} subject
-	 * @throws {TypeError} value is not a object
-	 * @throws {TypeError} value is not an instance of HTMLElement
-	 * @see {@link findDocumentTemplate}
-	 */
-	constructor(element, subject) {
-		super();
-
-		/**
-		 * @type {HTMLElement}
-		 */
-		if (subject === undefined) subject = {};
-		if (!isInstance(subject, ProxyObserver)) {
-			subject = new ProxyObserver(subject);
-		}
-
-		this[internalSymbol] = {
-			element: validateInstance(element, HTMLElement),
-			last: {},
-			callbacks: new Map(),
-			eventTypes: ["keyup", "click", "change", "drop", "touchend", "input"],
-			subject: subject,
-		};
-
-		this[internalSymbol].callbacks.set(
-			"checkstate",
-			getCheckStateCallback.call(this),
-		);
-
-		this[internalSymbol].subject.attachObserver(
-			new Observer(() => {
-				const s = this[internalSymbol].subject.getRealSubject();
-
-				const diffResult = diff(this[internalSymbol].last, s);
-				this[internalSymbol].last = clone(s);
-
-				const promises = [];
-
-				for (const [, change] of Object.entries(diffResult)) {
-					promises.push(
-						new Promise((resolve, reject) => {
-							getWindow().requestAnimationFrame(() => {
-								try {
-									removeElement.call(this, change);
-									insertElement.call(this, change);
-									updateContent.call(this, change);
-									updateAttributes.call(this, change);
-
-									resolve();
-								} catch (error) {
-									reject(error);
-								}
-							});
-						}),
-					);
-				}
-
-				return Promise.all(promises);
-			}),
-		);
-	}
-
-	/**
-	 * Defaults: 'keyup', 'click', 'change', 'drop', 'touchend'
-	 *
-	 * @see {@link https://developer.mozilla.org/de/docs/Web/Events}
-	 * @since 1.9.0
-	 * @param {Array} types
-	 * @return {Updater}
-	 */
-	setEventTypes(types) {
-		this[internalSymbol].eventTypes = validateArray(types);
-		return this;
-	}
-
-	/**
-	 * With this method, the eventlisteners are hooked in and the magic begins.
-	 *
-	 * ```js
-	 * updater.run().then(() => {
-	 *   updater.enableEventProcessing();
-	 * });
-	 * ```
-	 *
-	 * @since 1.9.0
-	 * @return {Updater}
-	 * @throws {Error} the bind argument must start as a value with a path
-	 */
-	enableEventProcessing() {
-		this.disableEventProcessing();
-
-		for (const type of this[internalSymbol].eventTypes) {
-			// @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
-			this[internalSymbol].element.addEventListener(
-				type,
-				getControlEventHandler.call(this),
-				{
-					capture: true,
-					passive: true,
-				},
-			);
-		}
-
-		return this;
-	}
-
-	/**
-	 * This method turns off the magic or who loves it more profane it removes the eventListener.
-	 *
-	 * @since 1.9.0
-	 * @return {Updater}
-	 */
-	disableEventProcessing() {
-		for (const type of this[internalSymbol].eventTypes) {
-			this[internalSymbol].element.removeEventListener(
-				type,
-				getControlEventHandler.call(this),
-			);
-		}
-
-		return this;
-	}
-
-	/**
-	 * The run method must be called for the update to start working.
-	 * The method ensures that changes are detected.
-	 *
-	 * ```js
-	 * updater.run().then(() => {
-	 *   updater.enableEventProcessing();
-	 * });
-	 * ```
-	 *
-	 * @summary Let the magic begin
-	 * @return {Promise}
-	 */
-	run() {
-		// the key __init__has no further meaning and is only
-		// used to create the diff for empty objects.
-		this[internalSymbol].last = { __init__: true };
-		return this[internalSymbol].subject.notifyObservers();
-	}
-
-	/**
-	 * Gets the values of bound elements and changes them in subject
-	 *
-	 * @since 1.27.0
-	 * @return {Monster.DOM.Updater}
-	 */
-	retrieve() {
-		retrieveFromBindings.call(this);
-		return this;
-	}
-
-	/**
-	 * If you have passed a ProxyObserver in the constructor, you will get the object that the ProxyObserver manages here.
-	 * However, if you passed a simple object, here you will get a proxy for that object.
-	 *
-	 * For changes, the ProxyObserver must be used.
-	 *
-	 * @since 1.8.0
-	 * @return {Proxy}
-	 */
-	getSubject() {
-		return this[internalSymbol].subject.getSubject();
-	}
-
-	/**
-	 * This method can be used to register commands that can be called via call: instruction.
-	 * This can be used to provide a pipe with its own functionality.
-	 *
-	 * @param {string} name
-	 * @param {function} callback
-	 * @return {Transformer}
-	 * @throws {TypeError} value is not a string
-	 * @throws {TypeError} value is not a function
-	 */
-	setCallback(name, callback) {
-		this[internalSymbol].callbacks.set(name, callback);
-		return this;
-	}
+    /**
+     * @since 1.8.0
+     * @param {HTMLElement} element
+     * @param {object|ProxyObserver|undefined} subject
+     * @throws {TypeError} value is not a object
+     * @throws {TypeError} value is not an instance of HTMLElement
+     * @see {@link findDocumentTemplate}
+     */
+    constructor(element, subject) {
+        super();
+
+        /**
+         * @type {HTMLElement}
+         */
+        if (subject === undefined) subject = {};
+        if (!isInstance(subject, ProxyObserver)) {
+            subject = new ProxyObserver(subject);
+        }
+
+        this[internalSymbol] = {
+            element: validateInstance(element, HTMLElement),
+            last: {},
+            callbacks: new Map(),
+            eventTypes: ["keyup", "click", "change", "drop", "touchend", "input"],
+            subject: subject,
+        };
+
+        this[internalSymbol].callbacks.set(
+            "checkstate",
+            getCheckStateCallback.call(this),
+        );
+
+        this[internalSymbol].subject.attachObserver(
+            new Observer(() => {
+                const s = this[internalSymbol].subject.getRealSubject();
+
+                const diffResult = diff(this[internalSymbol].last, s);
+                this[internalSymbol].last = clone(s);
+
+                const promises = [];
+
+                for (const [, change] of Object.entries(diffResult)) {
+                    promises.push(
+                        new Promise((resolve, reject) => {
+                            getWindow().requestAnimationFrame(() => {
+                                try {
+                                    removeElement.call(this, change);
+                                    insertElement.call(this, change);
+                                    updateContent.call(this, change);
+                                    updateAttributes.call(this, change);
+
+                                    resolve();
+                                } catch (error) {
+                                    reject(error);
+                                }
+                            });
+                        }),
+                    );
+                }
+
+                return Promise.all(promises);
+            }),
+        );
+    }
+
+    /**
+     * Defaults: 'keyup', 'click', 'change', 'drop', 'touchend'
+     *
+     * @see {@link https://developer.mozilla.org/de/docs/Web/Events}
+     * @since 1.9.0
+     * @param {Array} types
+     * @return {Updater}
+     */
+    setEventTypes(types) {
+        this[internalSymbol].eventTypes = validateArray(types);
+        return this;
+    }
+
+    /**
+     * With this method, the eventlisteners are hooked in and the magic begins.
+     *
+     * ```js
+     * updater.run().then(() => {
+     *   updater.enableEventProcessing();
+     * });
+     * ```
+     *
+     * @since 1.9.0
+     * @return {Updater}
+     * @throws {Error} the bind argument must start as a value with a path
+     */
+    enableEventProcessing() {
+        this.disableEventProcessing();
+
+        for (const type of this[internalSymbol].eventTypes) {
+            // @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
+            this[internalSymbol].element.addEventListener(
+                type,
+                getControlEventHandler.call(this),
+                {
+                    capture: true,
+                    passive: true,
+                },
+            );
+        }
+
+        return this;
+    }
+
+    /**
+     * This method turns off the magic or who loves it more profane it removes the eventListener.
+     *
+     * @since 1.9.0
+     * @return {Updater}
+     */
+    disableEventProcessing() {
+        for (const type of this[internalSymbol].eventTypes) {
+            this[internalSymbol].element.removeEventListener(
+                type,
+                getControlEventHandler.call(this),
+            );
+        }
+
+        return this;
+    }
+
+    /**
+     * The run method must be called for the update to start working.
+     * The method ensures that changes are detected.
+     *
+     * ```js
+     * updater.run().then(() => {
+     *   updater.enableEventProcessing();
+     * });
+     * ```
+     *
+     * @summary Let the magic begin
+     * @return {Promise}
+     */
+    run() {
+        // the key __init__has no further meaning and is only
+        // used to create the diff for empty objects.
+        this[internalSymbol].last = {__init__: true};
+        return this[internalSymbol].subject.notifyObservers();
+    }
+
+    /**
+     * Gets the values of bound elements and changes them in subject
+     *
+     * @since 1.27.0
+     * @return {Monster.DOM.Updater}
+     */
+    retrieve() {
+        retrieveFromBindings.call(this);
+        return this;
+    }
+
+    /**
+     * If you have passed a ProxyObserver in the constructor, you will get the object that the ProxyObserver manages here.
+     * However, if you passed a simple object, here you will get a proxy for that object.
+     *
+     * For changes, the ProxyObserver must be used.
+     *
+     * @since 1.8.0
+     * @return {Proxy}
+     */
+    getSubject() {
+        return this[internalSymbol].subject.getSubject();
+    }
+
+    /**
+     * This method can be used to register commands that can be called via call: instruction.
+     * This can be used to provide a pipe with its own functionality.
+     *
+     * @param {string} name
+     * @param {function} callback
+     * @return {Transformer}
+     * @throws {TypeError} value is not a string
+     * @throws {TypeError} value is not a function
+     */
+    setCallback(name, callback) {
+        this[internalSymbol].callbacks.set(name, callback);
+        return this;
+    }
 }
 
 /**
@@ -265,20 +275,20 @@ class Updater extends Base {
  * @this Updater
  */
 function getCheckStateCallback() {
-	return function (current) {
-		// this is a reference to the current object (therefore no array function here)
-		if (this instanceof HTMLInputElement) {
-			if (["radio", "checkbox"].indexOf(this.type) !== -1) {
-				return `${this.value}` === `${current}` ? "true" : undefined;
-			}
-		} else if (this instanceof HTMLOptionElement) {
-			if (isArray(current) && current.indexOf(this.value) !== -1) {
-				return "true";
-			}
-
-			return undefined;
-		}
-	};
+    return function (current) {
+        // this is a reference to the current object (therefore no array function here)
+        if (this instanceof HTMLInputElement) {
+            if (["radio", "checkbox"].indexOf(this.type) !== -1) {
+                return `${this.value}` === `${current}` ? "true" : undefined;
+            }
+        } else if (this instanceof HTMLOptionElement) {
+            if (isArray(current) && current.indexOf(this.value) !== -1) {
+                return "true";
+            }
+
+            return undefined;
+        }
+    };
 }
 
 /**
@@ -293,32 +303,41 @@ const symbol = Symbol("@schukai/monster/updater@@EventHandler");
  * @throws {Error} the bind argument must start as a value with a path
  */
 function getControlEventHandler() {
-	if (this[symbol]) {
-		return this[symbol];
-	}
-
-	/**
-	 * @throws {Error} the bind argument must start as a value with a path.
-	 * @throws {Error} unsupported object
-	 * @param {Event} event
-	 */
-	this[symbol] = (event) => {
-		const element = findTargetElementFromEvent(event, ATTRIBUTE_UPDATER_BIND);
-
-		if (element === undefined) {
-			return;
-		}
-
-		queueMicrotask(() => {
-			try {
-				retrieveAndSetValue.call(this, element);
-			} catch (e) {
-				addAttributeToken(element, ATTRIBUTE_ERRORMESSAGE, e.message || `${e}`);
-			}
-		});
-	};
-
-	return this[symbol];
+    if (this[symbol]) {
+        return this[symbol];
+    }
+
+    /**
+     * @throws {Error} the bind argument must start as a value with a path.
+     * @throws {Error} unsupported object
+     * @param {Event} event
+     */
+    this[symbol] = (event) => {
+        const element = findTargetElementFromEvent(event, ATTRIBUTE_UPDATER_BIND);
+
+        if (element === undefined) {
+            return;
+        }
+
+        if (this[timerElementEventHandlerSymbol] instanceof DeadMansSwitch) {
+            try {
+                this[timerElementEventHandlerSymbol].touch();
+                return;
+            } catch (e) {
+                delete this[timerElementEventHandlerSymbol];
+            }
+        }
+
+        this[timerElementEventHandlerSymbol] = new DeadMansSwitch(50, () => {
+            try {
+                retrieveAndSetValue.call(this, element);
+            } catch (e) {
+                addErrorAttribute(element, e);
+            }
+        });
+    };
+
+    return this[symbol];
 }
 
 /**
@@ -328,128 +347,176 @@ function getControlEventHandler() {
  * @private
  */
 function retrieveAndSetValue(element) {
-	const pathfinder = new Pathfinder(this[internalSymbol].subject.getSubject());
-
-	let path = element.getAttribute(ATTRIBUTE_UPDATER_BIND);
-	if (path === null)
-		throw new Error("the bind argument must start as a value with a path");
-
-	if (path.indexOf("path:") !== 0) {
-		throw new Error("the bind argument must start as a value with a path");
-	}
-
-	path = path.substring(5); // remove path: from the string
-
-	let value;
-
-	if (element instanceof HTMLInputElement) {
-		switch (element.type) {
-			case "checkbox":
-				value = element.checked ? element.value : undefined;
-				break;
-			default:
-				value = element.value;
-				break;
-		}
-	} else if (element instanceof HTMLTextAreaElement) {
-		value = element.value;
-	} else if (element instanceof HTMLSelectElement) {
-		switch (element.type) {
-			case "select-one":
-				value = element.value;
-				break;
-			case "select-multiple":
-				value = element.value;
-
-				let options = element?.selectedOptions;
-				if (options === undefined)
-					options = element.querySelectorAll(":scope option:checked");
-				value = Array.from(options).map(({ value }) => value);
-
-				break;
-		}
-
-		// values from custom elements
-	} else if (
-		(element?.constructor?.prototype &&
-			!!Object.getOwnPropertyDescriptor(
-				element.constructor.prototype,
-				"value",
-			)?.["get"]) ||
-		element.hasOwnProperty("value")
-	) {
-		value = element?.["value"];
-	} else {
-		throw new Error("unsupported object");
-	}
-
-	if (isString(value)) {
-		const type = element.getAttribute(ATTRIBUTE_UPDATER_BIND_TYPE);
-		switch (type) {
-			case "number":
-			case "int":
-			case "float":
-			case "integer":
-				value = Number(value);
-				if (isNaN(value)) {
-					value = 0;
-				}
-				break;
-			case "boolean":
-			case "bool":
-			case "checkbox":
-				value = value === "true" || value === "1" || value === "on";
-				break;
-
-			case "string[]":
-				if (value === "") {
-					value = [];
-				}
-
-				value = value.split(",").map((v) => `${v}`);
-				break;
-
-			case "int[]":
-			case "integer[]":
-				if (value === "") {
-					value = [];
-				} else {
-					value = value
-						.split(",")
-						.map((v) => {
-							try {
-								return parseInt(v, 10);
-							} catch (e) {}
-							return -1;
-						})
-						.filter((v) => v !== -1);
-				}
-
-				break;
-			case "[]":
-			case "array":
-			case "list":
-				value = value.split(",");
-				break;
-			case "object":
-			case "json":
-				value = JSON.parse(value);
-				break;
-			default:
-				break;
-		}
-	}
-
-	const copy = clone(this[internalSymbol].subject.getRealSubject());
-
-	const pf = new Pathfinder(copy);
-	pf.setVia(path, value);
-
-	const diffResult = diff(copy, this[internalSymbol].subject.getRealSubject());
-
-	if (diffResult.length > 0) {
-		pathfinder.setVia(path, value);
-	}
+    const pathfinder = new Pathfinder(this[internalSymbol].subject.getSubject());
+
+    let path = element.getAttribute(ATTRIBUTE_UPDATER_BIND);
+    if (path === null)
+        throw new Error("the bind argument must start as a value with a path");
+
+    if (path.indexOf("path:") !== 0) {
+        throw new Error("the bind argument must start as a value with a path");
+    }
+
+    path = path.substring(5); // remove path: from the string
+
+    let value;
+
+    if (element instanceof HTMLInputElement) {
+        switch (element.type) {
+            case "checkbox":
+                value = element.checked ? element.value : undefined;
+                break;
+            default:
+                value = element.value;
+                break;
+        }
+    } else if (element instanceof HTMLTextAreaElement) {
+        value = element.value;
+    } else if (element instanceof HTMLSelectElement) {
+        switch (element.type) {
+            case "select-one":
+                value = element.value;
+                break;
+            case "select-multiple":
+                value = element.value;
+
+                let options = element?.selectedOptions;
+                if (options === undefined)
+                    options = element.querySelectorAll(":scope option:checked");
+                value = Array.from(options).map(({value}) => value);
+
+                break;
+        }
+
+        // values from custom elements
+    } else if (
+        (element?.constructor?.prototype &&
+            !!Object.getOwnPropertyDescriptor(
+                element.constructor.prototype,
+                "value",
+            )?.["get"]) ||
+        element.hasOwnProperty("value")
+    ) {
+        value = element?.["value"];
+    } else {
+        throw new Error("unsupported object");
+    }
+
+    const type = element.getAttribute(ATTRIBUTE_UPDATER_BIND_TYPE);
+    switch (type) {
+        case "number":
+        case "int":
+        case "float":
+        case "integer":
+            value = Number(value);
+            if (isNaN(value)) {
+                value = 0;
+            }
+            break;
+        case "boolean":
+        case "bool":
+        case "checkbox":
+            value = value === "true" || value === "1" || value === "on" || value === true;
+            break;
+
+        case "string[]":
+            if (isString(value)) {
+
+                if (value.trim() === "") {
+                    value = [];
+                } else {
+                    value = value.split(",").map((v) => `${v}`);
+                }
+            } else if (isInteger(value)) {
+                value = [`${value}`];
+            } else if (value === undefined || value === null) {
+                value = [];
+            } else if (isArray(value)) {
+                value = value.map((v) => `${v}`);
+            } else {
+                throw new Error("unsupported value");
+            }
+
+            break;
+
+        case "int[]":
+        case "integer[]":
+
+            if (isString(value)) {
+
+                if (value.trim() === "") {
+                    value = [];
+                } else {
+                    value = value.split(",").map((v) => {
+                        try {
+                            return parseInt(v, 10);
+                        } catch (e) {
+                        }
+                        return -1;
+                    }).filter((v) => v !== -1);
+                }
+
+            } else if (isInteger(value)) {
+                value = [value];
+            } else if (value === undefined || value === null) {
+                value = [];
+            } else if (isArray(value)) {
+                value = value.split(",").map((v) => {
+                    try {
+                        return parseInt(v, 10);
+                    } catch (e) {
+                    }
+                    return -1;
+                }).filter((v) => v !== -1);
+            } else {
+                throw new Error("unsupported value");
+            }
+
+            break;
+        case "[]":
+        case "array":
+        case "list":
+
+            if (isString(value)) {
+                if (value.trim() === "") {
+                    value = [];
+                } else {
+                    value = value.split(",");
+                }
+            } else if (isInteger(value)) {
+                value = [value];
+            } else if (value === undefined || value === null) {
+                value = [];
+            } else if (isArray(value)) {
+                // nothing to do
+            } else {
+                throw new Error("unsupported value for array");
+            }
+            break;
+        case "object":
+        case "json":
+
+            if (isString(value)) {
+                value = JSON.parse(value);
+            } else {
+                throw new Error("unsupported value for object");
+            }
+
+            break;
+        default:
+            break;
+    }
+
+    const copy = clone(this[internalSymbol].subject.getRealSubject());
+
+    const pf = new Pathfinder(copy);
+    pf.setVia(path, value);
+
+    const diffResult = diff(copy, this[internalSymbol].subject.getRealSubject());
+
+    if (diffResult.length > 0) {
+        pathfinder.setVia(path, value);
+    }
 }
 
 /**
@@ -459,15 +526,15 @@ function retrieveAndSetValue(element) {
  * @private
  */
 function retrieveFromBindings() {
-	if (this[internalSymbol].element.matches(`[${ATTRIBUTE_UPDATER_BIND}]`)) {
-		retrieveAndSetValue.call(this, this[internalSymbol].element);
-	}
-
-	for (const [, element] of this[internalSymbol].element
-		.querySelectorAll(`[${ATTRIBUTE_UPDATER_BIND}]`)
-		.entries()) {
-		retrieveAndSetValue.call(this, element);
-	}
+    if (this[internalSymbol].element.matches(`[${ATTRIBUTE_UPDATER_BIND}]`)) {
+        retrieveAndSetValue.call(this, this[internalSymbol].element);
+    }
+
+    for (const [, element] of this[internalSymbol].element
+        .querySelectorAll(`[${ATTRIBUTE_UPDATER_BIND}]`)
+        .entries()) {
+        retrieveAndSetValue.call(this, element);
+    }
 }
 
 /**
@@ -478,11 +545,11 @@ function retrieveFromBindings() {
  * @return {void}
  */
 function removeElement(change) {
-	for (const [, element] of this[internalSymbol].element
-		.querySelectorAll(`:scope [${ATTRIBUTE_UPDATER_REMOVE}]`)
-		.entries()) {
-		element.parentNode.removeChild(element);
-	}
+    for (const [, element] of this[internalSymbol].element
+        .querySelectorAll(`:scope [${ATTRIBUTE_UPDATER_REMOVE}]`)
+        .entries()) {
+        element.parentNode.removeChild(element);
+    }
 }
 
 /**
@@ -498,133 +565,128 @@ function removeElement(change) {
  * @this Updater
  */
 function insertElement(change) {
-	const subject = this[internalSymbol].subject.getRealSubject();
+    const subject = this[internalSymbol].subject.getRealSubject();
 
-	const mem = new WeakSet();
-	let wd = 0;
+    const mem = new WeakSet();
+    let wd = 0;
 
-	const container = this[internalSymbol].element;
+    const container = this[internalSymbol].element;
 
-	while (true) {
-		let found = false;
-		wd++;
-
-		const p = clone(change?.["path"]);
-		if (!isArray(p)) return;
-
-		while (p.length > 0) {
-			const current = p.join(".");
-
-			let iterator = new Set();
-			const query = `[${ATTRIBUTE_UPDATER_INSERT}*="path:${current}"]`;
-
-			const e = container.querySelectorAll(query);
-
-			if (e.length > 0) {
-				iterator = new Set([...e]);
-			}
-
-			if (container.matches(query)) {
-				iterator.add(container);
-			}
-
-			for (const [, containerElement] of iterator.entries()) {
-				if (mem.has(containerElement)) continue;
-				mem.add(containerElement);
-
-				found = true;
-
-				const attributes = containerElement.getAttribute(
-					ATTRIBUTE_UPDATER_INSERT,
-				);
-				if (attributes === null) continue;
-
-				const def = trimSpaces(attributes);
-				const i = def.indexOf(" ");
-				const key = trimSpaces(def.substr(0, i));
-				const refPrefix = `${key}-`;
-				const cmd = trimSpaces(def.substr(i));
-
-				// this case is actually excluded by the query but is nevertheless checked again here
-				if (cmd.indexOf("|") > 0) {
-					throw new Error("pipes are not allowed when cloning a node.");
-				}
-
-				const pipe = new Pipe(cmd);
-				this[internalSymbol].callbacks.forEach((f, n) => {
-					pipe.setCallback(n, f);
-				});
-
-				let value;
-				try {
-					containerElement.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
-					value = pipe.run(subject);
-				} catch (e) {
-					containerElement.setAttribute(ATTRIBUTE_ERRORMESSAGE, e.message);
-				}
-
-				const dataPath = cmd.split(":").pop();
-
-				let insertPoint;
-				if (containerElement.hasChildNodes()) {
-					insertPoint = containerElement.lastChild;
-				}
-
-				if (!isIterable(value)) {
-					throw new Error("the value is not iterable");
-				}
-
-				const available = new Set();
-
-				for (const [i] of Object.entries(value)) {
-					const ref = refPrefix + i;
-					const currentPath = `${dataPath}.${i}`;
-
-					available.add(ref);
-					const refElement = containerElement.querySelector(
-						`[${ATTRIBUTE_UPDATER_INSERT_REFERENCE}="${ref}"]`,
-					);
-
-					if (refElement instanceof HTMLElement) {
-						insertPoint = refElement;
-						continue;
-					}
-
-					appendNewDocumentFragment(containerElement, key, ref, currentPath);
-				}
-
-				const nodes = containerElement.querySelectorAll(
-					`[${ATTRIBUTE_UPDATER_INSERT_REFERENCE}*="${refPrefix}"]`,
-				);
-
-				for (const [, node] of Object.entries(nodes)) {
-					if (
-						!available.has(
-							node.getAttribute(ATTRIBUTE_UPDATER_INSERT_REFERENCE),
-						)
-					) {
-						try {
-							containerElement.removeChild(node);
-						} catch (e) {
-							containerElement.setAttribute(
-								ATTRIBUTE_ERRORMESSAGE,
-								`${containerElement.getAttribute(ATTRIBUTE_ERRORMESSAGE)}, ${
-									e.message
-								}`.trim(),
-							);
-						}
-					}
-				}
-			}
-
-			p.pop();
-		}
-
-		if (found === false) break;
-		if (wd++ > 200) {
-			throw new Error("the maximum depth for the recursion is reached.");
-		}
-	}
+    while (true) {
+        let found = false;
+        wd++;
+
+        const p = clone(change?.["path"]);
+        if (!isArray(p)) return;
+
+        while (p.length > 0) {
+            const current = p.join(".");
+
+            let iterator = new Set();
+            const query = `[${ATTRIBUTE_UPDATER_INSERT}*="path:${current}"]`;
+
+            const e = container.querySelectorAll(query);
+
+            if (e.length > 0) {
+                iterator = new Set([...e]);
+            }
+
+            if (container.matches(query)) {
+                iterator.add(container);
+            }
+
+            for (const [, containerElement] of iterator.entries()) {
+                if (mem.has(containerElement)) continue;
+                mem.add(containerElement);
+
+                found = true;
+
+                const attributes = containerElement.getAttribute(
+                    ATTRIBUTE_UPDATER_INSERT,
+                );
+                if (attributes === null) continue;
+
+                const def = trimSpaces(attributes);
+                const i = def.indexOf(" ");
+                const key = trimSpaces(def.substr(0, i));
+                const refPrefix = `${key}-`;
+                const cmd = trimSpaces(def.substr(i));
+
+                // this case is actually excluded by the query but is nevertheless checked again here
+                if (cmd.indexOf("|") > 0) {
+                    throw new Error("pipes are not allowed when cloning a node.");
+                }
+
+                const pipe = new Pipe(cmd);
+                this[internalSymbol].callbacks.forEach((f, n) => {
+                    pipe.setCallback(n, f);
+                });
+
+                let value;
+                try {
+                    containerElement.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
+                    value = pipe.run(subject);
+                } catch (e) {
+                    addErrorAttribute(containerElement, e);
+                }
+
+                const dataPath = cmd.split(":").pop();
+
+                let insertPoint;
+                if (containerElement.hasChildNodes()) {
+                    insertPoint = containerElement.lastChild;
+                }
+
+                if (!isIterable(value)) {
+                    throw new Error("the value is not iterable");
+                }
+
+                const available = new Set();
+
+                for (const [i] of Object.entries(value)) {
+                    const ref = refPrefix + i;
+                    const currentPath = `${dataPath}.${i}`;
+
+                    available.add(ref);
+                    const refElement = containerElement.querySelector(
+                        `[${ATTRIBUTE_UPDATER_INSERT_REFERENCE}="${ref}"]`,
+                    );
+
+                    if (refElement instanceof HTMLElement) {
+                        insertPoint = refElement;
+                        continue;
+                    }
+
+                    appendNewDocumentFragment(containerElement, key, ref, currentPath);
+                }
+
+                const nodes = containerElement.querySelectorAll(
+                    `[${ATTRIBUTE_UPDATER_INSERT_REFERENCE}*="${refPrefix}"]`,
+                );
+
+                for (const [, node] of Object.entries(nodes)) {
+                    if (
+                        !available.has(
+                            node.getAttribute(ATTRIBUTE_UPDATER_INSERT_REFERENCE),
+                        )
+                    ) {
+                        try {
+                            containerElement.removeChild(node);
+                        } catch (e) {
+                            addErrorAttribute(containerElement, e);
+                        }
+                    }
+                }
+            }
+
+            p.pop();
+        }
+
+        if (found === false) break;
+        if (wd++ > 200) {
+            throw new Error("the maximum depth for the recursion is reached.");
+        }
+    }
 }
 
 /**
@@ -639,17 +701,17 @@ function insertElement(change) {
  * @throws {Error} no template was found with the specified key.
  */
 function appendNewDocumentFragment(container, key, ref, path) {
-	const template = findDocumentTemplate(key, container);
+    const template = findDocumentTemplate(key, container);
 
-	const nodes = template.createDocumentFragment();
-	for (const [, node] of Object.entries(nodes.childNodes)) {
-		if (node instanceof HTMLElement) {
-			applyRecursive(node, key, path);
-			node.setAttribute(ATTRIBUTE_UPDATER_INSERT_REFERENCE, ref);
-		}
+    const nodes = template.createDocumentFragment();
+    for (const [, node] of Object.entries(nodes.childNodes)) {
+        if (node instanceof HTMLElement) {
+            applyRecursive(node, key, path);
+            node.setAttribute(ATTRIBUTE_UPDATER_INSERT_REFERENCE, ref);
+        }
 
-		container.appendChild(node);
-	}
+        container.appendChild(node);
+    }
 }
 
 /**
@@ -662,27 +724,32 @@ function appendNewDocumentFragment(container, key, ref, path) {
  * @return {void}
  */
 function applyRecursive(node, key, path) {
-	if (node instanceof HTMLElement) {
-		if (node.hasAttribute(ATTRIBUTE_UPDATER_REPLACE)) {
-			const value = node.getAttribute(ATTRIBUTE_UPDATER_REPLACE);
-			node.setAttribute(
-				ATTRIBUTE_UPDATER_REPLACE,
-				value.replaceAll(`path:${key}`, `path:${path}`),
-			);
-		}
-
-		if (node.hasAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES)) {
-			const value = node.getAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES);
-			node.setAttribute(
-				ATTRIBUTE_UPDATER_ATTRIBUTES,
-				value.replaceAll(`path:${key}`, `path:${path}`),
-			);
-		}
-
-		for (const [, child] of Object.entries(node.childNodes)) {
-			applyRecursive(child, key, path);
-		}
-	}
+    if (!(node instanceof HTMLElement)) {
+        return
+    }
+
+    if (node.hasAttribute(ATTRIBUTE_UPDATER_REPLACE)) {
+        const value = node.getAttribute(ATTRIBUTE_UPDATER_REPLACE);
+        node.setAttribute(
+            ATTRIBUTE_UPDATER_REPLACE,
+            value.replaceAll(`path:${key}`, `path:${path}`),
+        );
+    }
+
+    if (node.hasAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES)) {
+        const value = node.getAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES);
+        node.setAttribute(
+            ATTRIBUTE_UPDATER_ATTRIBUTES,
+            value.replaceAll(`path:${key}`, `path:${path}`),
+        );
+    }
+
+    for (const [, child] of Object.entries(node.childNodes)) {
+        if (child instanceof HTMLElement) {
+            applyRecursive(child, key, path);
+        }
+    }
+
 }
 
 /**
@@ -694,19 +761,19 @@ function applyRecursive(node, key, path) {
  * @this Updater
  */
 function updateContent(change) {
-	const subject = this[internalSymbol].subject.getRealSubject();
-
-	const p = clone(change?.["path"]);
-	runUpdateContent.call(this, this[internalSymbol].element, p, subject);
-
-	const slots = this[internalSymbol].element.querySelectorAll("slot");
-	if (slots.length > 0) {
-		for (const [, slot] of Object.entries(slots)) {
-			for (const [, element] of Object.entries(slot.assignedNodes())) {
-				runUpdateContent.call(this, element, p, subject);
-			}
-		}
-	}
+    const subject = this[internalSymbol].subject.getRealSubject();
+
+    const p = clone(change?.["path"]);
+    runUpdateContent.call(this, this[internalSymbol].element, p, subject);
+
+    const slots = this[internalSymbol].element.querySelectorAll("slot");
+    if (slots.length > 0) {
+        for (const [, slot] of Object.entries(slots)) {
+            for (const [, element] of Object.entries(slot.assignedNodes())) {
+                runUpdateContent.call(this, element, p, subject);
+            }
+        }
+    }
 }
 
 /**
@@ -719,69 +786,64 @@ function updateContent(change) {
  * @return {void}
  */
 function runUpdateContent(container, parts, subject) {
-	if (!isArray(parts)) return;
-	if (!(container instanceof HTMLElement)) return;
-	parts = clone(parts);
-
-	const mem = new WeakSet();
-
-	while (parts.length > 0) {
-		const current = parts.join(".");
-		parts.pop();
-
-		// Unfortunately, static data is always changed as well, since it is not possible to react to changes here.
-		const query = `[${ATTRIBUTE_UPDATER_REPLACE}^="path:${current}"], [${ATTRIBUTE_UPDATER_REPLACE}^="static:"], [${ATTRIBUTE_UPDATER_REPLACE}^="i18n:"]`;
-		const e = container.querySelectorAll(`${query}`);
-
-		const iterator = new Set([...e]);
-
-		if (container.matches(query)) {
-			iterator.add(container);
-		}
-
-		/**
-		 * @type {HTMLElement}
-		 */
-		for (const [element] of iterator.entries()) {
-			if (mem.has(element)) return;
-			mem.add(element);
-
-			const attributes = element.getAttribute(ATTRIBUTE_UPDATER_REPLACE);
-			const cmd = trimSpaces(attributes);
-
-			const pipe = new Pipe(cmd);
-			this[internalSymbol].callbacks.forEach((f, n) => {
-				pipe.setCallback(n, f);
-			});
-
-			let value;
-			try {
-				element.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
-				value = pipe.run(subject);
-			} catch (e) {
-				element.setAttribute(ATTRIBUTE_ERRORMESSAGE, e.message);
-			}
-
-			if (value instanceof HTMLElement) {
-				while (element.firstChild) {
-					element.removeChild(element.firstChild);
-				}
-
-				try {
-					element.appendChild(value);
-				} catch (e) {
-					element.setAttribute(
-						ATTRIBUTE_ERRORMESSAGE,
-						`${element.getAttribute(ATTRIBUTE_ERRORMESSAGE)}, ${
-							e.message
-						}`.trim(),
-					);
-				}
-			} else {
-				element.innerHTML = value;
-			}
-		}
-	}
+    if (!isArray(parts)) return;
+    if (!(container instanceof HTMLElement)) return;
+    parts = clone(parts);
+
+    const mem = new WeakSet();
+
+    while (parts.length > 0) {
+        const current = parts.join(".");
+        parts.pop();
+
+        // Unfortunately, static data is always changed as well, since it is not possible to react to changes here.
+        const query = `[${ATTRIBUTE_UPDATER_REPLACE}^="path:${current}"], [${ATTRIBUTE_UPDATER_REPLACE}^="static:"], [${ATTRIBUTE_UPDATER_REPLACE}^="i18n:"]`;
+        const e = container.querySelectorAll(`${query}`);
+
+        const iterator = new Set([...e]);
+
+        if (container.matches(query)) {
+            iterator.add(container);
+        }
+
+        /**
+         * @type {HTMLElement}
+         */
+        for (const [element] of iterator.entries()) {
+            if (mem.has(element)) return;
+            mem.add(element);
+
+            const attributes = element.getAttribute(ATTRIBUTE_UPDATER_REPLACE);
+            const cmd = trimSpaces(attributes);
+
+            const pipe = new Pipe(cmd);
+            this[internalSymbol].callbacks.forEach((f, n) => {
+                pipe.setCallback(n, f);
+            });
+
+            let value;
+            try {
+                element.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
+                value = pipe.run(subject);
+            } catch (e) {
+                element.setAttribute(ATTRIBUTE_ERRORMESSAGE, e.message);
+            }
+
+            if (value instanceof HTMLElement) {
+                while (element.firstChild) {
+                    element.removeChild(element.firstChild);
+                }
+
+                try {
+                    element.appendChild(value);
+                } catch (e) {
+                    addErrorAttribute(element, e);
+                }
+            } else {
+                element.innerHTML = value;
+            }
+        }
+    }
 }
 
 /**
@@ -791,9 +853,9 @@ function runUpdateContent(container, parts, subject) {
  * @return {void}
  */
 function updateAttributes(change) {
-	const subject = this[internalSymbol].subject.getRealSubject();
-	const p = clone(change?.["path"]);
-	runUpdateAttributes.call(this, this[internalSymbol].element, p, subject);
+    const subject = this[internalSymbol].subject.getRealSubject();
+    const p = clone(change?.["path"]);
+    runUpdateAttributes.call(this, this[internalSymbol].element, p, subject);
 }
 
 /**
@@ -805,70 +867,70 @@ function updateAttributes(change) {
  * @this Updater
  */
 function runUpdateAttributes(container, parts, subject) {
-	if (!isArray(parts)) return;
-	parts = clone(parts);
+    if (!isArray(parts)) return;
+    parts = clone(parts);
 
-	const mem = new WeakSet();
+    const mem = new WeakSet();
 
-	while (parts.length > 0) {
-		const current = parts.join(".");
-		parts.pop();
+    while (parts.length > 0) {
+        const current = parts.join(".");
+        parts.pop();
 
-		let iterator = new Set();
+        let iterator = new Set();
 
-		const query = `[${ATTRIBUTE_UPDATER_SELECT_THIS}][${ATTRIBUTE_UPDATER_ATTRIBUTES}], [${ATTRIBUTE_UPDATER_ATTRIBUTES}*="path:${current}"], [${ATTRIBUTE_UPDATER_ATTRIBUTES}^="static:"], [${ATTRIBUTE_UPDATER_ATTRIBUTES}^="i18n:"]`;
+        const query = `[${ATTRIBUTE_UPDATER_SELECT_THIS}][${ATTRIBUTE_UPDATER_ATTRIBUTES}], [${ATTRIBUTE_UPDATER_ATTRIBUTES}*="path:${current}"], [${ATTRIBUTE_UPDATER_ATTRIBUTES}^="static:"], [${ATTRIBUTE_UPDATER_ATTRIBUTES}^="i18n:"]`;
 
-		const e = container.querySelectorAll(query);
+        const e = container.querySelectorAll(query);
 
-		if (e.length > 0) {
-			iterator = new Set([...e]);
-		}
+        if (e.length > 0) {
+            iterator = new Set([...e]);
+        }
 
-		if (container.matches(query)) {
-			iterator.add(container);
-		}
+        if (container.matches(query)) {
+            iterator.add(container);
+        }
 
-		for (const [element] of iterator.entries()) {
-			if (mem.has(element)) return;
-			mem.add(element);
+        for (const [element] of iterator.entries()) {
+            if (mem.has(element)) return;
+            mem.add(element);
 
-			// this case occurs when the ATTRIBUTE_UPDATER_SELECT_THIS attribute is set
-			if (!element.hasAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES)) {
-				continue;
-			}
+            // this case occurs when the ATTRIBUTE_UPDATER_SELECT_THIS attribute is set
+            if (!element.hasAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES)) {
+                continue;
+            }
 
-			const attributes = element.getAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES);
+            const attributes = element.getAttribute(ATTRIBUTE_UPDATER_ATTRIBUTES);
 
-			for (let [, def] of Object.entries(attributes.split(","))) {
-				def = trimSpaces(def);
-				const i = def.indexOf(" ");
-				const name = trimSpaces(def.substr(0, i));
-				const cmd = trimSpaces(def.substr(i));
+            for (let [, def] of Object.entries(attributes.split(","))) {
+                def = trimSpaces(def);
+                const i = def.indexOf(" ");
+                const name = trimSpaces(def.substr(0, i));
+                const cmd = trimSpaces(def.substr(i));
 
-				const pipe = new Pipe(cmd);
+                const pipe = new Pipe(cmd);
 
-				this[internalSymbol].callbacks.forEach((f, n) => {
-					pipe.setCallback(n, f, element);
-				});
+                this[internalSymbol].callbacks.forEach((f, n) => {
+                    pipe.setCallback(n, f, element);
+                });
 
-				let value;
-				try {
-					element.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
-					value = pipe.run(subject);
-				} catch (e) {
-					element.setAttribute(ATTRIBUTE_ERRORMESSAGE, e.message);
-				}
+                let value;
+                try {
+                    element.removeAttribute(ATTRIBUTE_ERRORMESSAGE);
+                    value = pipe.run(subject);
+                } catch (e) {
+                    addErrorAttribute(element, e);
+                }
 
-				if (value === undefined) {
-					element.removeAttribute(name);
-				} else if (element.getAttribute(name) !== value) {
-					element.setAttribute(name, value);
-				}
+                if (value === undefined) {
+                    element.removeAttribute(name);
+                } else if (element.getAttribute(name) !== value) {
+                    element.setAttribute(name, value);
+                }
 
-				handleInputControlAttributeUpdate.call(this, element, name, value);
-			}
-		}
-	}
+                handleInputControlAttributeUpdate.call(this, element, name, value);
+            }
+        }
+    }
 }
 
 /**
@@ -881,52 +943,52 @@ function runUpdateAttributes(container, parts, subject) {
  */
 
 function handleInputControlAttributeUpdate(element, name, value) {
-	if (element instanceof HTMLSelectElement) {
-		switch (element.type) {
-			case "select-multiple":
-				for (const [index, opt] of Object.entries(element.options)) {
-					opt.selected = value.indexOf(opt.value) !== -1;
-				}
-
-				break;
-			case "select-one":
-				// Only one value may be selected
-
-				for (const [index, opt] of Object.entries(element.options)) {
-					if (opt.value === value) {
-						element.selectedIndex = index;
-						break;
-					}
-				}
-
-				break;
-		}
-	} else if (element instanceof HTMLInputElement) {
-		switch (element.type) {
-			case "radio":
-				if (name === "checked") {
-					element.checked = value !== undefined;
-				}
-				break;
-
-			case "checkbox":
-				if (name === "checked") {
-					element.checked = value !== undefined;
-				}
-				break;
-
-			case "text":
-			default:
-				if (name === "value") {
-					element.value = value === undefined ? "" : value;
-				}
-				break;
-		}
-	} else if (element instanceof HTMLTextAreaElement) {
-		if (name === "value") {
-			element.value = value === undefined ? "" : value;
-		}
-	}
+    if (element instanceof HTMLSelectElement) {
+        switch (element.type) {
+            case "select-multiple":
+                for (const [index, opt] of Object.entries(element.options)) {
+                    opt.selected = value.indexOf(opt.value) !== -1;
+                }
+
+                break;
+            case "select-one":
+                // Only one value may be selected
+
+                for (const [index, opt] of Object.entries(element.options)) {
+                    if (opt.value === value) {
+                        element.selectedIndex = index;
+                        break;
+                    }
+                }
+
+                break;
+        }
+    } else if (element instanceof HTMLInputElement) {
+        switch (element.type) {
+            case "radio":
+                if (name === "checked") {
+                    element.checked = value !== undefined;
+                }
+                break;
+
+            case "checkbox":
+                if (name === "checked") {
+                    element.checked = value !== undefined;
+                }
+                break;
+
+            case "text":
+            default:
+                if (name === "value") {
+                    element.value = value === undefined ? "" : value;
+                }
+                break;
+        }
+    } else if (element instanceof HTMLTextAreaElement) {
+        if (name === "value") {
+            element.value = value === undefined ? "" : value;
+        }
+    }
 }
 
 /**
@@ -945,83 +1007,78 @@ function handleInputControlAttributeUpdate(element, name, value) {
  * @throws {TypeError} symbol must be an instance of Symbol
  */
 function addObjectWithUpdaterToElement(elements, symbol, object, config = {}) {
-	if (!(this instanceof HTMLElement)) {
-		throw new TypeError(
-			"the context of this function must be an instance of HTMLElement",
-		);
-	}
-
-	if (!(typeof symbol === "symbol")) {
-		throw new TypeError("symbol must be an instance of Symbol");
-	}
-
-	const updaters = new Set();
-
-	if (elements instanceof NodeList) {
-		elements = new Set([...elements]);
-	} else if (elements instanceof HTMLElement) {
-		elements = new Set([elements]);
-	} else if (elements instanceof Set) {
-	} else {
-		throw new TypeError(
-			`elements is not a valid type. (actual: ${typeof elements})`,
-		);
-	}
-
-	const result = [];
-
-	const updaterCallbacks = [];
-	const cb = this?.[updaterTransformerMethodsSymbol];
-	if (this instanceof HTMLElement && typeof cb === "function") {
-		const callbacks = cb.call(this);
-		if (typeof callbacks === "object") {
-			for (const [name, callback] of Object.entries(callbacks)) {
-				if (typeof callback === "function") {
-					updaterCallbacks.push([name, callback]);
-				} else {
-					addAttributeToken(
-						this,
-						ATTRIBUTE_ERRORMESSAGE,
-						`onUpdaterPipeCallbacks: ${name} is not a function`,
-					);
-				}
-			}
-		} else {
-			addAttributeToken(
-				this,
-				ATTRIBUTE_ERRORMESSAGE,
-				`onUpdaterPipeCallbacks do not return an object with functions`,
-			);
-		}
-	}
-
-	elements.forEach((element) => {
-		if (!(element instanceof HTMLElement)) return;
-		if (element instanceof HTMLTemplateElement) return;
-
-		const u = new Updater(element, object);
-		updaters.add(u);
-
-		if (updaterCallbacks.length > 0) {
-			for (const [name, callback] of updaterCallbacks) {
-				u.setCallback(name, callback);
-			}
-		}
-
-		result.push(
-			u.run().then(() => {
-				if (config.eventProcessing === true) {
-					u.enableEventProcessing();
-				}
-
-				return u;
-			}),
-		);
-	});
-
-	if (updaters.size > 0) {
-		addToObjectLink(this, symbol, updaters);
-	}
-
-	return result;
+    if (!(this instanceof HTMLElement)) {
+        throw new TypeError(
+            "the context of this function must be an instance of HTMLElement",
+        );
+    }
+
+    if (!(typeof symbol === "symbol")) {
+        throw new TypeError("symbol must be an instance of Symbol");
+    }
+
+    const updaters = new Set();
+
+    if (elements instanceof NodeList) {
+        elements = new Set([...elements]);
+    } else if (elements instanceof HTMLElement) {
+        elements = new Set([elements]);
+    } else if (elements instanceof Set) {
+    } else {
+        throw new TypeError(
+            `elements is not a valid type. (actual: ${typeof elements})`,
+        );
+    }
+
+    const result = [];
+
+    const updaterCallbacks = [];
+    const cb = this?.[updaterTransformerMethodsSymbol];
+    if (this instanceof HTMLElement && typeof cb === "function") {
+        const callbacks = cb.call(this);
+        if (typeof callbacks === "object") {
+            for (const [name, callback] of Object.entries(callbacks)) {
+                if (typeof callback === "function") {
+                    updaterCallbacks.push([name, callback]);
+                } else {
+                    addErrorAttribute(this, `onUpdaterPipeCallbacks: ${name} is not a function`);
+                }
+            }
+        } else {
+            addErrorAttribute(
+                this,
+                `onUpdaterPipeCallbacks do not return an object with functions`
+            );
+        }
+    }
+
+    elements.forEach((element) => {
+        if (!(element instanceof HTMLElement)) return;
+        if (element instanceof HTMLTemplateElement) return;
+
+        const u = new Updater(element, object);
+        updaters.add(u);
+
+        if (updaterCallbacks.length > 0) {
+            for (const [name, callback] of updaterCallbacks) {
+                u.setCallback(name, callback);
+            }
+        }
+
+        result.push(
+            u.run().then(() => {
+                if (config.eventProcessing === true) {
+                    u.enableEventProcessing();
+                }
+
+                return u;
+            }),
+        );
+    });
+
+    if (updaters.size > 0) {
+        addToObjectLink(this, symbol, updaters);
+    }
+
+    return result;
 }