/**
* Tom Select v2.4.3
* Licensed under the Apache License, Version 2.0 (the "License");
*/

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.dropdown_header = factory());
})(this, (function () { 'use strict';

	/**
	 * Converts a scalar to its best string representation
	 * for hash keys and HTML attribute values.
	 *
	 * Transformations:
	 *   'str'     -> 'str'
	 *   null      -> ''
	 *   undefined -> ''
	 *   true      -> '1'
	 *   false     -> '0'
	 *   0         -> '0'
	 *   1         -> '1'
	 *
	 */

	/**
	 * Prevent default
	 *
	 */
	const preventDefault = (evt, stop = false) => {
	  if (evt) {
	    evt.preventDefault();
	    if (stop) {
	      evt.stopPropagation();
	    }
	  }
	};

	/**
	 * Return a dom element from either a dom query string, jQuery object, a dom element or html string
	 * https://stackoverflow.com/questions/494143/creating-a-new-dom-element-from-an-html-string-using-built-in-dom-methods-or-pro/35385518#35385518
	 *
	 * param query should be {}
	 */
	const getDom = query => {
	  if (query.jquery) {
	    return query[0];
	  }
	  if (query instanceof HTMLElement) {
	    return query;
	  }
	  if (isHtmlString(query)) {
	    var tpl = document.createElement('template');
	    tpl.innerHTML = query.trim(); // Never return a text node of whitespace as the result
	    return tpl.content.firstChild;
	  }
	  return document.querySelector(query);
	};
	const isHtmlString = arg => {
	  if (typeof arg === 'string' && arg.indexOf('<') > -1) {
	    return true;
	  }
	  return false;
	};

	/**
	 * Plugin: "dropdown_header" (Tom Select)
	 * Copyright (c) contributors
	 *
	 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
	 * file except in compliance with the License. You may obtain a copy of the License at:
	 * http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software distributed under
	 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
	 * ANY KIND, either express or implied. See the License for the specific language
	 * governing permissions and limitations under the License.
	 *
	 */

	function plugin (userOptions) {
	  const self = this;
	  const options = Object.assign({
	    title: 'Untitled',
	    headerClass: 'dropdown-header',
	    titleRowClass: 'dropdown-header-title',
	    labelClass: 'dropdown-header-label',
	    closeClass: 'dropdown-header-close',
	    html: data => {
	      return '<div class="' + data.headerClass + '">' + '<div class="' + data.titleRowClass + '">' + '<span class="' + data.labelClass + '">' + data.title + '</span>' + '<a class="' + data.closeClass + '">&times;</a>' + '</div>' + '</div>';
	    }
	  }, userOptions);
	  self.on('initialize', () => {
	    var header = getDom(options.html(options));
	    var close_link = header.querySelector('.' + options.closeClass);
	    if (close_link) {
	      close_link.addEventListener('click', evt => {
	        preventDefault(evt, true);
	        self.close();
	      });
	    }
	    self.dropdown.insertBefore(header, self.dropdown.firstChild);
	  });
	}

	return plugin;

}));
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