bootstrap.esm.js

        return data;
      };
    } else {
      offset.offset = this.config.offset;
    }

    return offset;
  };

  _proto._getContainer = function _getContainer() {
    if (this.config.container === false) {
      return document.body;
    }

    if (isElement(this.config.container)) {
      return this.config.container;
    }

    return SelectorEngine.findOne(this.config.container);
  };

  _proto._getAttachment = function _getAttachment(placement) {
    return AttachmentMap$1[placement.toUpperCase()];
  };

  _proto._setListeners = function _setListeners() {
    var _this4 = this;

    var triggers = this.config.trigger.split(' ');
    triggers.forEach(function (trigger) {
      if (trigger === 'click') {
        EventHandler.on(_this4.element, _this4.constructor.Event.CLICK, _this4.config.selector, function (event) {
          return _this4.toggle(event);
        });
      } else if (trigger !== Trigger.MANUAL) {
        var eventIn = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSEENTER : _this4.constructor.Event.FOCUSIN;
        var eventOut = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSELEAVE : _this4.constructor.Event.FOCUSOUT;
        EventHandler.on(_this4.element, eventIn, _this4.config.selector, function (event) {
          return _this4._enter(event);
        });
        EventHandler.on(_this4.element, eventOut, _this4.config.selector, function (event) {
          return _this4._leave(event);
        });
      }
    });
    EventHandler.on(SelectorEngine.closest(this.element, '.modal'), 'hide.bs.modal', function () {
      if (_this4.element) {
        _this4.hide();
      }
    });

    if (this.config.selector) {
      this.config = _objectSpread({}, this.config, {
        trigger: 'manual',
        selector: ''
      });
    } else {
      this._fixTitle();
    }
  };

  _proto._fixTitle = function _fixTitle() {
    var titleType = typeof this.element.getAttribute('data-original-title');

    if (this.element.getAttribute('title') || titleType !== 'string') {
      this.element.setAttribute('data-original-title', this.element.getAttribute('title') || '');
      this.element.setAttribute('title', '');
    }
  };

  _proto._enter = function _enter(event, context) {
    var dataKey = this.constructor.DATA_KEY;
    context = context || Data.getData(event.delegateTarget, dataKey);

    if (!context) {
      context = new this.constructor(event.delegateTarget, this._getDelegateConfig());
      Data.setData(event.delegateTarget, dataKey, context);
    }

    if (event) {
      context._activeTrigger[event.type === 'focusin' ? Trigger.FOCUS : Trigger.HOVER] = true;
    }

    if (context.getTipElement().classList.contains(ClassName$6.SHOW) || context._hoverState === HoverState.SHOW) {
      context._hoverState = HoverState.SHOW;
      return;
    }

    clearTimeout(context._timeout);
    context._hoverState = HoverState.SHOW;

    if (!context.config.delay || !context.config.delay.show) {
      context.show();
      return;
    }

    context._timeout = setTimeout(function () {
      if (context._hoverState === HoverState.SHOW) {
        context.show();
      }
    }, context.config.delay.show);
  };

  _proto._leave = function _leave(event, context) {
    var dataKey = this.constructor.DATA_KEY;
    context = context || Data.getData(event.delegateTarget, dataKey);

    if (!context) {
      context = new this.constructor(event.delegateTarget, this._getDelegateConfig());
      Data.setData(event.delegateTarget, dataKey, context);
    }

    if (event) {
      context._activeTrigger[event.type === 'focusout' ? Trigger.FOCUS : Trigger.HOVER] = false;
    }

    if (context._isWithActiveTrigger()) {
      return;
    }

    clearTimeout(context._timeout);
    context._hoverState = HoverState.OUT;

    if (!context.config.delay || !context.config.delay.hide) {
      context.hide();
      return;
    }

    context._timeout = setTimeout(function () {
      if (context._hoverState === HoverState.OUT) {
        context.hide();
      }
    }, context.config.delay.hide);
  };

  _proto._isWithActiveTrigger = function _isWithActiveTrigger() {
    for (var trigger in this._activeTrigger) {
      if (this._activeTrigger[trigger]) {
        return true;
      }
    }

    return false;
  };

  _proto._getConfig = function _getConfig(config) {
    var dataAttributes = Manipulator.getDataAttributes(this.element);
    Object.keys(dataAttributes).forEach(function (dataAttr) {
      if (DISALLOWED_ATTRIBUTES.indexOf(dataAttr) !== -1) {
        delete dataAttributes[dataAttr];
      }
    });

    if (config && typeof config.container === 'object' && config.container.jquery) {
      config.container = config.container[0];
    }

    config = _objectSpread({}, this.constructor.Default, dataAttributes, typeof config === 'object' && config ? config : {});

    if (typeof config.delay === 'number') {
      config.delay = {
        show: config.delay,
        hide: config.delay
      };
    }

    if (typeof config.title === 'number') {
      config.title = config.title.toString();
    }

    if (typeof config.content === 'number') {
      config.content = config.content.toString();
    }

    typeCheckConfig(NAME$6, config, this.constructor.DefaultType);

    if (config.sanitize) {
      config.template = sanitizeHtml(config.template, config.whiteList, config.sanitizeFn);
    }

    return config;
  };

  _proto._getDelegateConfig = function _getDelegateConfig() {
    var config = {};

    if (this.config) {
      for (var key in this.config) {
        if (this.constructor.Default[key] !== this.config[key]) {
          config[key] = this.config[key];
        }
      }
    }

    return config;
  };

  _proto._cleanTipClass = function _cleanTipClass() {
    var tip = this.getTipElement();
    var tabClass = tip.getAttribute('class').match(BSCLS_PREFIX_REGEX);

    if (tabClass !== null && tabClass.length) {
      tabClass.map(function (token) {
        return token.trim();
      }).forEach(function (tClass) {
        return tip.classList.remove(tClass);
      });
    }
  };

  _proto._handlePopperPlacementChange = function _handlePopperPlacementChange(popperData) {
    var popperInstance = popperData.instance;
    this.tip = popperInstance.popper;

    this._cleanTipClass();

    this.addAttachmentClass(this._getAttachment(popperData.placement));
  };

  _proto._fixTransition = function _fixTransition() {
    var tip = this.getTipElement();
    var initConfigAnimation = this.config.animation;

    if (tip.getAttribute('x-placement') !== null) {
      return;
    }

    tip.classList.remove(ClassName$6.FADE);
    this.config.animation = false;
    this.hide();
    this.show();
    this.config.animation = initConfigAnimation;
  } // Static
  ;

  Tooltip._jQueryInterface = function _jQueryInterface(config) {
    return this.each(function () {
      var data = Data.getData(this, DATA_KEY$6);

      var _config = typeof config === 'object' && config;

      if (!data && /dispose|hide/.test(config)) {
        return;
      }

      if (!data) {
        data = new Tooltip(this, _config);
      }

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError("No method named \"" + config + "\"");
        }

        data[config]();
      }
    });
  };

  Tooltip._getInstance = function _getInstance(element) {
    return Data.getData(element, DATA_KEY$6);
  };

  _createClass(Tooltip, null, [{
    key: "VERSION",
    get: function get() {
      return VERSION$6;
    }
  }, {
    key: "Default",
    get: function get() {
      return Default$4;
    }
  }, {
    key: "NAME",
    get: function get() {
      return NAME$6;
    }
  }, {
    key: "DATA_KEY",
    get: function get() {
      return DATA_KEY$6;
    }
  }, {
    key: "Event",
    get: function get() {
      return Event$7;
    }
  }, {
    key: "EVENT_KEY",
    get: function get() {
      return EVENT_KEY$6;
    }
  }, {
    key: "DefaultType",
    get: function get() {
      return DefaultType$4;
    }
  }]);

  return Tooltip;
}();
/**
 * ------------------------------------------------------------------------
 * jQuery
 * ------------------------------------------------------------------------
 * add .tooltip to jQuery only if jQuery is present
 */


if (typeof jQuery !== 'undefined') {
  var JQUERY_NO_CONFLICT$6 = jQuery.fn[NAME$6];
  jQuery.fn[NAME$6] = Tooltip._jQueryInterface;
  jQuery.fn[NAME$6].Constructor = Tooltip;

  jQuery.fn[NAME$6].noConflict = function () {
    jQuery.fn[NAME$6] = JQUERY_NO_CONFLICT$6;
    return Tooltip._jQueryInterface;
  };
}

/**
 * ------------------------------------------------------------------------
 * Constants
 * ------------------------------------------------------------------------
 */

var NAME$7 = 'popover';
var VERSION$7 = '4.3.1';
var DATA_KEY$7 = 'bs.popover';
var EVENT_KEY$7 = "." + DATA_KEY$7;
var CLASS_PREFIX$1 = 'bs-popover';
var BSCLS_PREFIX_REGEX$1 = new RegExp("(^|\\s)" + CLASS_PREFIX$1 + "\\S+", 'g');

var Default$5 = _objectSpread({}, Tooltip.Default, {
  placement: 'right',
  trigger: 'click',
  content: '',
  template: '<div class="popover" role="tooltip">' + '<div class="popover-arrow"></div>' + '<h3 class="popover-header"></h3>' + '<div class="popover-body"></div></div>'
});

var DefaultType$5 = _objectSpread({}, Tooltip.DefaultType, {
  content: '(string|element|function)'
});

var ClassName$7 = {
  FADE: 'fade',
  SHOW: 'show'
};
var Selector$7 = {
  TITLE: '.popover-header',
  CONTENT: '.popover-body'
};
var Event$8 = {
  HIDE: "hide" + EVENT_KEY$7,
  HIDDEN: "hidden" + EVENT_KEY$7,
  SHOW: "show" + EVENT_KEY$7,
  SHOWN: "shown" + EVENT_KEY$7,
  INSERTED: "inserted" + EVENT_KEY$7,
  CLICK: "click" + EVENT_KEY$7,
  FOCUSIN: "focusin" + EVENT_KEY$7,
  FOCUSOUT: "focusout" + EVENT_KEY$7,
  MOUSEENTER: "mouseenter" + EVENT_KEY$7,
  MOUSELEAVE: "mouseleave" + EVENT_KEY$7
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

};

var Popover =
/*#__PURE__*/
function (_Tooltip) {
  _inheritsLoose(Popover, _Tooltip);

  function Popover() {
    return _Tooltip.apply(this, arguments) || this;
  }

  var _proto = Popover.prototype;

  // Overrides
  _proto.isWithContent = function isWithContent() {
    return this.getTitle() || this._getContent();
  };

  _proto.addAttachmentClass = function addAttachmentClass(attachment) {
    this.getTipElement().classList.add(CLASS_PREFIX$1 + "-" + attachment);
  };

  _proto.setContent = function setContent() {
    var tip = this.getTipElement(); // we use append for html objects to maintain js events

    this.setElementContent(SelectorEngine.findOne(Selector$7.TITLE, tip), this.getTitle());

    var content = this._getContent();

    if (typeof content === 'function') {
      content = content.call(this.element);
    }

    this.setElementContent(SelectorEngine.findOne(Selector$7.CONTENT, tip), content);
    tip.classList.remove(ClassName$7.FADE);
    tip.classList.remove(ClassName$7.SHOW);
  } // Private
  ;

  _proto._getContent = function _getContent() {
    return this.element.getAttribute('data-content') || this.config.content;
  };

  _proto._cleanTipClass = function _cleanTipClass() {
    var tip = this.getTipElement();
    var tabClass = tip.getAttribute('class').match(BSCLS_PREFIX_REGEX$1);

    if (tabClass !== null && tabClass.length > 0) {
      tabClass.map(function (token) {
        return token.trim();
      }).forEach(function (tClass) {
        return tip.classList.remove(tClass);
      });
    }
  } // Static
  ;

  Popover._jQueryInterface = function _jQueryInterface(config) {
    return this.each(function () {
      var data = Data.getData(this, DATA_KEY$7);

      var _config = typeof config === 'object' ? config : null;

      if (!data && /dispose|hide/.test(config)) {
        return;
      }

      if (!data) {
        data = new Popover(this, _config);
        Data.setData(this, DATA_KEY$7, data);
      }

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError("No method named \"" + config + "\"");
        }

        data[config]();
      }
    });
  };

  Popover._getInstance = function _getInstance(element) {
    return Data.getData(element, DATA_KEY$7);
  };

  _createClass(Popover, null, [{
    key: "VERSION",
    // Getters
    get: function get() {
      return VERSION$7;
    }
  }, {
    key: "Default",
    get: function get() {
      return Default$5;
    }
  }, {
    key: "NAME",
    get: function get() {
      return NAME$7;
    }
  }, {
    key: "DATA_KEY",
    get: function get() {
      return DATA_KEY$7;
    }
  }, {
    key: "Event",
    get: function get() {
      return Event$8;
    }
  }, {
    key: "EVENT_KEY",
    get: function get() {
      return EVENT_KEY$7;
    }
  }, {
    key: "DefaultType",
    get: function get() {
      return DefaultType$5;
    }
  }]);

  return Popover;
}(Tooltip);
/**
 * ------------------------------------------------------------------------
 * jQuery
 * ------------------------------------------------------------------------
 */


if (typeof jQuery !== 'undefined') {
  var JQUERY_NO_CONFLICT$7 = jQuery.fn[NAME$7];
  jQuery.fn[NAME$7] = Popover._jQueryInterface;
  jQuery.fn[NAME$7].Constructor = Popover;

  jQuery.fn[NAME$7].noConflict = function () {
    jQuery.fn[NAME$7] = JQUERY_NO_CONFLICT$7;
    return Popover._jQueryInterface;
  };
}

/**
 * ------------------------------------------------------------------------
 * Constants
 * ------------------------------------------------------------------------
 */

var NAME$8 = 'scrollspy';
var VERSION$8 = '4.3.1';
var DATA_KEY$8 = 'bs.scrollspy';
var EVENT_KEY$8 = "." + DATA_KEY$8;
var DATA_API_KEY$6 = '.data-api';
var Default$6 = {
  offset: 10,
  method: 'auto',
  target: ''
};
var DefaultType$6 = {
  offset: 'number',
  method: 'string',
  target: '(string|element)'
};
var Event$9 = {
  ACTIVATE: "activate" + EVENT_KEY$8,
  SCROLL: "scroll" + EVENT_KEY$8,
  LOAD_DATA_API: "load" + EVENT_KEY$8 + DATA_API_KEY$6
};
var ClassName$8 = {
  DROPDOWN_ITEM: 'dropdown-item',
  ACTIVE: 'active'
};
var Selector$8 = {
  DATA_SPY: '[data-spy="scroll"]',
  NAV_LIST_GROUP: '.nav, .list-group',
  NAV_LINKS: '.nav-link',
  NAV_ITEMS: '.nav-item',
  LIST_ITEMS: '.list-group-item',
  DROPDOWN: '.dropdown',
  DROPDOWN_TOGGLE: '.dropdown-toggle'
};
var OffsetMethod = {
  OFFSET: 'offset',
  POSITION: 'position'
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

};

var ScrollSpy =
/*#__PURE__*/
function () {
  function ScrollSpy(element, config) {
    var _this = this;

    this._element = element;
    this._scrollElement = element.tagName === 'BODY' ? window : element;
    this._config = this._getConfig(config);
    this._selector = this._config.target + " " + Selector$8.NAV_LINKS + "," + (this._config.target + " " + Selector$8.LIST_ITEMS + ",") + (this._config.target + " ." + ClassName$8.DROPDOWN_ITEM);
    this._offsets = [];
    this._targets = [];
    this._activeTarget = null;
    this._scrollHeight = 0;
    EventHandler.on(this._scrollElement, Event$9.SCROLL, function (event) {
      return _this._process(event);
    });
    this.refresh();

    this._process();

    Data.setData(element, DATA_KEY$8, this);
  } // Getters


  var _proto = ScrollSpy.prototype;

  // Public
  _proto.refresh = function refresh() {
    var _this2 = this;

    var autoMethod = this._scrollElement === this._scrollElement.window ? OffsetMethod.OFFSET : OffsetMethod.POSITION;
    var offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;
    var offsetBase = offsetMethod === OffsetMethod.POSITION ? this._getScrollTop() : 0;
    this._offsets = [];
    this._targets = [];
    this._scrollHeight = this._getScrollHeight();
    var targets = makeArray(SelectorEngine.find(this._selector));
    targets.map(function (element) {
      var target;
      var targetSelector = getSelectorFromElement(element);

      if (targetSelector) {
        target = SelectorEngine.findOne(targetSelector);
      }

      if (target) {
        var targetBCR = target.getBoundingClientRect();

        if (targetBCR.width || targetBCR.height) {
          return [Manipulator[offsetMethod](target).top + offsetBase, targetSelector];
        }
      }

      return null;
    }).filter(function (item) {
      return item;
    }).sort(function (a, b) {
      return a[0] - b[0];
    }).forEach(function (item) {
      _this2._offsets.push(item[0]);

      _this2._targets.push(item[1]);
    });
  };

  _proto.dispose = function dispose() {
    Data.removeData(this._element, DATA_KEY$8);
    EventHandler.off(this._scrollElement, EVENT_KEY$8);
    this._element = null;
    this._scrollElement = null;
    this._config = null;
    this._selector = null;
    this._offsets = null;
    this._targets = null;
    this._activeTarget = null;
    this._scrollHeight = null;
  } // Private
  ;

  _proto._getConfig = function _getConfig(config) {
    config = _objectSpread({}, Default$6, typeof config === 'object' && config ? config : {});

    if (typeof config.target !== 'string') {
      var id = config.target.id;

      if (!id) {
        id = getUID(NAME$8);
        config.target.id = id;
      }

      config.target = "#" + id;
    }

    typeCheckConfig(NAME$8, config, DefaultType$6);
    return config;
  };

  _proto._getScrollTop = function _getScrollTop() {
    return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;
  };

  _proto._getScrollHeight = function _getScrollHeight() {
    return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
  };

  _proto._getOffsetHeight = function _getOffsetHeight() {
    return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;
  };

  _proto._process = function _process() {
    var scrollTop = this._getScrollTop() + this._config.offset;

    var scrollHeight = this._getScrollHeight();

    var maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();

    if (this._scrollHeight !== scrollHeight) {
      this.refresh();
    }

    if (scrollTop >= maxScroll) {
      var target = this._targets[this._targets.length - 1];

      if (this._activeTarget !== target) {
        this._activate(target);
      }

      return;
    }

    if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {
      this._activeTarget = null;

      this._clear();

      return;
    }

    var offsetLength = this._offsets.length;

    for (var i = offsetLength; i--;) {
      var isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);

      if (isActiveTarget) {
        this._activate(this._targets[i]);
      }
    }
  };

  _proto._activate = function _activate(target) {
    this._activeTarget = target;

    this._clear();

    var queries = this._selector.split(',').map(function (selector) {
      return selector + "[data-target=\"" + target + "\"]," + selector + "[href=\"" + target + "\"]";
    });

    var link = SelectorEngine.findOne(queries.join(','));

    if (link.classList.contains(ClassName$8.DROPDOWN_ITEM)) {
      SelectorEngine.findOne(Selector$8.DROPDOWN_TOGGLE, SelectorEngine.closest(link, Selector$8.DROPDOWN)).classList.add(ClassName$8.ACTIVE);
      link.classList.add(ClassName$8.ACTIVE);
    } else {
      // Set triggered link as active
      link.classList.add(ClassName$8.ACTIVE);
      SelectorEngine.parents(link, Selector$8.NAV_LIST_GROUP).forEach(function (listGroup) {
        // Set triggered links parents as active
        // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
        SelectorEngine.prev(listGroup, Selector$8.NAV_LINKS + ", " + Selector$8.LIST_ITEMS).forEach(function (item) {
          return item.classList.add(ClassName$8.ACTIVE);
        }); // Handle special case when .nav-link is inside .nav-item

        SelectorEngine.prev(listGroup, Selector$8.NAV_ITEMS).forEach(function (navItem) {
          SelectorEngine.children(navItem, Selector$8.NAV_LINKS).forEach(function (item) {
            return item.classList.add(ClassName$8.ACTIVE);
          });
        });
      });
    }

    EventHandler.trigger(this._scrollElement, Event$9.ACTIVATE, {
      relatedTarget: target
    });
  };

  _proto._clear = function _clear() {
    makeArray(SelectorEngine.find(this._selector)).filter(function (node) {
      return node.classList.contains(ClassName$8.ACTIVE);
    }).forEach(function (node) {
      return node.classList.remove(ClassName$8.ACTIVE);
    });
  } // Static
  ;

  ScrollSpy._jQueryInterface = function _jQueryInterface(config) {
    return this.each(function () {
      var data = Data.getData(this, DATA_KEY$8);

      var _config = typeof config === 'object' && config;

      if (!data) {
        data = new ScrollSpy(this, _config);
      }

      if (typeof config === 'string') {
        if (typeof data[config] === 'undefined') {
          throw new TypeError("No method named \"" + config + "\"");
        }

        data[config]();
      }
    });
  };

  ScrollSpy._getInstance = function _getInstance(element) {
    return Data.getData(element, DATA_KEY$8);
  };

  _createClass(ScrollSpy, null, [{
    key: "VERSION",
    get: function get() {
      return VERSION$8;
    }
  }, {
    key: "Default",
    get: function get() {
      return Default$6;
    }
  }]);

  return ScrollSpy;
}();
/**
 * ------------------------------------------------------------------------
 * Data Api implementation
 * ------------------------------------------------------------------------
 */


EventHandler.on(window, Event$9.LOAD_DATA_API, function () {
  makeArray(SelectorEngine.find(Selector$8.DATA_SPY)).forEach(function (spy) {
    return new ScrollSpy(spy, Manipulator.getDataAttributes(spy));
  });
});
/**
 * ------------------------------------------------------------------------
 * jQuery
 * ------------------------------------------------------------------------
 */

if (typeof jQuery !== 'undefined') {
  var JQUERY_NO_CONFLICT$8 = jQuery.fn[NAME$8];
  jQuery.fn[NAME$8] = ScrollSpy._jQueryInterface;
  jQuery.fn[NAME$8].Constructor = ScrollSpy;

  jQuery.fn[NAME$8].noConflict = function () {
    jQuery.fn[NAME$8] = JQUERY_NO_CONFLICT$8;
    return ScrollSpy._jQueryInterface;
  };
}

/**
 * ------------------------------------------------------------------------
 * Constants
 * ------------------------------------------------------------------------
 */

var NAME$9 = 'tab';
var VERSION$9 = '4.3.1';
var DATA_KEY$9 = 'bs.tab';
var EVENT_KEY$9 = "." + DATA_KEY$9;
var DATA_API_KEY$7 = '.data-api';
var Event$a = {
  HIDE: "hide" + EVENT_KEY$9,
  HIDDEN: "hidden" + EVENT_KEY$9,
  SHOW: "show" + EVENT_KEY$9,
  SHOWN: "shown" + EVENT_KEY$9,
  CLICK_DATA_API: "click" + EVENT_KEY$9 + DATA_API_KEY$7
};
var ClassName$9 = {
  DROPDOWN_MENU: 'dropdown-menu',
  ACTIVE: 'active',
  DISABLED: 'disabled',
  FADE: 'fade',
  SHOW: 'show'
};
var Selector$9 = {
  DROPDOWN: '.dropdown',
  NAV_LIST_GROUP: '.nav, .list-group',
  ACTIVE: '.active',
  ACTIVE_UL: ':scope > li > .active',
  DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"], [data-toggle="list"]',
  DROPDOWN_TOGGLE: '.dropdown-toggle',
  DROPDOWN_ACTIVE_CHILD: ':scope > .dropdown-menu .active'
  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

};

var Tab =
/*#__PURE__*/
function () {
  function Tab(element) {
    this._element = element;
    Data.setData(this._element, DATA_KEY$9, this);
  } // Getters


  var _proto = Tab.prototype;

  // Public
  _proto.show = function show() {
    var _this = this;

    if (this._element.parentNode && this._element.parentNode.nodeType === Node.ELEMENT_NODE && this._element.classList.contains(ClassName$9.ACTIVE) || this._element.classList.contains(ClassName$9.DISABLED)) {
      return;
    }

    var target;
    var previous;
    var listElement = SelectorEngine.closest(this._element, Selector$9.NAV_LIST_GROUP);
    var selector = getSelectorFromElement(this._element);

    if (listElement) {
      var itemSelector = listElement.nodeName === 'UL' || listElement.nodeName === 'OL' ? Selector$9.ACTIVE_UL : Selector$9.ACTIVE;
      previous = makeArray(SelectorEngine.find(itemSelector, listElement));
      previous = previous[previous.length - 1];
    }

    var hideEvent = null;

    if (previous) {
      hideEvent = EventHandler.trigger(previous, Event$a.HIDE, {
        relatedTarget: this._element
      });
    }

    var showEvent = EventHandler.trigger(this._element, Event$a.SHOW, {
      relatedTarget: previous
    });

    if (showEvent.defaultPrevented || hideEvent !== null && hideEvent.defaultPrevented) {
      return;
    }

    if (selector) {
      target = SelectorEngine.findOne(selector);
    }

    this._activate(this._element, listElement);

    var complete = function complete() {
      EventHandler.trigger(previous, Event$a.HIDDEN, {
        relatedTarget: _this._element
      });
      EventHandler.trigger(_this._element, Event$a.SHOWN, {
        relatedTarget: previous
      });
    };

    if (target) {
      this._activate(target, target.parentNode, complete);
    } else {
      complete();
    }
  };

  _proto.dispose = function dispose() {
    Data.removeData(this._element, DATA_KEY$9);
    this._element = null;
  } // Private
  ;

  _proto._activate = function _activate(element, container, callback) {
    var _this2 = this;

    var activeElements = container && (container.nodeName === 'UL' || container.nodeName === 'OL') ? SelectorEngine.find(Selector$9.ACTIVE_UL, container) : SelectorEngine.children(container, Selector$9.ACTIVE);
    var active = activeElements[0];
    var isTransitioning = callback && active && active.classList.contains(ClassName$9.FADE);

    var complete = function complete() {
      return _this2._transitionComplete(element, active, callback);
    };

    if (active && isTransitioning) {
      var transitionDuration = getTransitionDurationFromElement(active);
      active.classList.remove(ClassName$9.SHOW);
      EventHandler.one(active, TRANSITION_END, complete);
      emulateTransitionEnd(active, transitionDuration);
    } else {
      complete();
    }
  };

  _proto._transitionComplete = function _transitionComplete(element, active, callback) {
    if (active) {
      active.classList.remove(ClassName$9.ACTIVE);
      var dropdownChild = SelectorEngine.findOne(Selector$9.DROPDOWN_ACTIVE_CHILD, active.parentNode);

      if (dropdownChild) {
        dropdownChild.classList.remove(ClassName$9.ACTIVE);
      }

      if (active.getAttribute('role') === 'tab') {
        active.setAttribute('aria-selected', false);
      }
    }

    element.classList.add(ClassName$9.ACTIVE);

    if (element.getAttribute('role') === 'tab') {
      element.setAttribute('aria-selected', true);
    }

    reflow(element);

    if (element.classList.contains(ClassName$9.FADE)) {
      element.classList.add(ClassName$9.SHOW);
    }

    if (element.parentNode && element.parentNode.classList.contains(ClassName$9.DROPDOWN_MENU)) {
      var dropdownElement = SelectorEngine.closest(element, Selector$9.DROPDOWN);

      if (dropdownElement) {
        makeArray(SelectorEngine.find(Selector$9.DROPDOWN_TOGGLE)).forEach(function (dropdown) {
          return dropdown.classList.add(ClassName$9.ACTIVE);
        });
      }

      element.setAttribute('aria-expanded', true);
    }