bootstrap.js

          if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.FADE)) {
            $(this._backdrop).one(Util.TRANSITION_END, callbackRemove).emulateTransitionEnd(BACKDROP_TRANSITION_DURATION);
          } else {
            callbackRemove();
          }
        } else if (callback) {
          callback();
        }
      }

      // ----------------------------------------------------------------------
      // the following methods are used to handle overflowing modals
      // todo (fat): these should probably be refactored out of modal.js
      // ----------------------------------------------------------------------

    }, {
      key: '_handleUpdate',
      value: function _handleUpdate() {
        this._adjustDialog();
      }
    }, {
      key: '_adjustDialog',
      value: function _adjustDialog() {
        var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;

        if (!this._isBodyOverflowing && isModalOverflowing) {
          this._element.style.paddingLeft = this._scrollbarWidth + 'px';
        }

        if (this._isBodyOverflowing && !isModalOverflowing) {
          this._element.style.paddingRight = this._scrollbarWidth + 'px~';
        }
      }
    }, {
      key: '_resetAdjustments',
      value: function _resetAdjustments() {
        this._element.style.paddingLeft = '';
        this._element.style.paddingRight = '';
      }
    }, {
      key: '_checkScrollbar',
      value: function _checkScrollbar() {
        var fullWindowWidth = window.innerWidth;
        if (!fullWindowWidth) {
          // workaround for missing window.innerWidth in IE8
          var documentElementRect = document.documentElement.getBoundingClientRect();
          fullWindowWidth = documentElementRect.right - Math.abs(documentElementRect.left);
        }
        this._isBodyOverflowing = document.body.clientWidth < fullWindowWidth;
        this._scrollbarWidth = this._getScrollbarWidth();
      }
    }, {
      key: '_setScrollbar',
      value: function _setScrollbar() {
        var bodyPadding = parseInt($(Selector.FIXED_CONTENT).css('padding-right') || 0, 10);

        this._originalBodyPadding = document.body.style.paddingRight || '';

        if (this._isBodyOverflowing) {
          document.body.style.paddingRight = bodyPadding + this._scrollbarWidth + 'px';
        }
      }
    }, {
      key: '_resetScrollbar',
      value: function _resetScrollbar() {
        document.body.style.paddingRight = this._originalBodyPadding;
      }
    }, {
      key: '_getScrollbarWidth',
      value: function _getScrollbarWidth() {
        // thx d.walsh
        var scrollDiv = document.createElement('div');
        scrollDiv.className = ClassName.SCROLLBAR_MEASURER;
        document.body.appendChild(scrollDiv);
        var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
        document.body.removeChild(scrollDiv);
        return scrollbarWidth;
      }

      // static

    }], [{
      key: '_jQueryInterface',
      value: function _jQueryInterface(config, relatedTarget) {
        return this.each(function () {
          var data = $(this).data(DATA_KEY);
          var _config = $.extend({}, Modal.Default, $(this).data(), typeof config === 'object' && config);

          if (!data) {
            data = new Modal(this, _config);
            $(this).data(DATA_KEY, data);
          }

          if (typeof config === 'string') {
            data[config](relatedTarget);
          } else if (_config.show) {
            data.show(relatedTarget);
          }
        });
      }
    }, {
      key: 'VERSION',
      get: function get() {
        return VERSION;
      }
    }, {
      key: 'Default',
      get: function get() {
        return Default;
      }
    }]);

    return Modal;
  })();

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
    var _this13 = this;

    var target = undefined;
    var selector = Util.getSelectorFromElement(this);

    if (selector) {
      target = $(selector)[0];
    }

    var config = $(target).data(DATA_KEY) ? 'toggle' : $.extend({}, $(target).data(), $(this).data());

    if (this.tagName === 'A') {
      event.preventDefault();
    }

    var $target = $(target).one(Event.SHOW, function (showEvent) {
      if (showEvent.isDefaultPrevented()) {
        // only register focus restorer if modal will actually get shown
        return;
      }

      $target.one(Event.HIDDEN, function () {
        if ($(_this13).is(':visible')) {
          _this13.focus();
        }
      });
    });

    Modal._jQueryInterface.call($(target), config, this);
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Modal._jQueryInterface;
  $.fn[NAME].Constructor = Modal;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Modal._jQueryInterface;
  };

  return Modal;
})(jQuery);

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): scrollspy.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

var ScrollSpy = (function ($) {

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

  var NAME = 'scrollspy';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.scrollspy';
  var EVENT_KEY = '.' + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $.fn[NAME];

  var Default = {
    offset: 10,
    method: 'auto',
    target: ''
  };

  var DefaultType = {
    offset: 'number',
    method: 'string',
    target: '(string|element)'
  };

  var Event = {
    ACTIVATE: 'activate' + EVENT_KEY,
    SCROLL: 'scroll' + EVENT_KEY,
    LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY
  };

  var ClassName = {
    DROPDOWN_ITEM: 'dropdown-item',
    DROPDOWN_MENU: 'dropdown-menu',
    NAV_LINK: 'nav-link',
    NAV: 'nav',
    ACTIVE: 'active'
  };

  var Selector = {
    DATA_SPY: '[data-spy="scroll"]',
    ACTIVE: '.active',
    LIST_ITEM: '.list-item',
    LI: 'li',
    LI_DROPDOWN: 'li.dropdown',
    NAV_LINKS: '.nav-link',
    DROPDOWN: '.dropdown',
    DROPDOWN_ITEMS: '.dropdown-item',
    DROPDOWN_TOGGLE: '.dropdown-toggle'
  };

  var OffsetMethod = {
    OFFSET: 'offset',
    POSITION: 'position'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var ScrollSpy = (function () {
    function ScrollSpy(element, config) {
      _classCallCheck(this, ScrollSpy);

      this._element = element;
      this._scrollElement = element.tagName === 'BODY' ? window : element;
      this._config = this._getConfig(config);
      this._selector = this._config.target + ' ' + Selector.NAV_LINKS + ',' + (this._config.target + ' ' + Selector.DROPDOWN_ITEMS);
      this._offsets = [];
      this._targets = [];
      this._activeTarget = null;
      this._scrollHeight = 0;

      $(this._scrollElement).on(Event.SCROLL, $.proxy(this._process, this));

      this.refresh();
      this._process();
    }

    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */

    // getters

    _createClass(ScrollSpy, [{
      key: 'refresh',

      // public

      value: function refresh() {
        var _this14 = this;

        var autoMethod = this._scrollElement !== this._scrollElement.window ? OffsetMethod.POSITION : OffsetMethod.OFFSET;

        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 = $.makeArray($(this._selector));

        targets.map(function (element) {
          var target = undefined;
          var targetSelector = Util.getSelectorFromElement(element);

          if (targetSelector) {
            target = $(targetSelector)[0];
          }

          if (target && (target.offsetWidth || target.offsetHeight)) {
            // todo (fat): remove sketch reliance on jQuery position/offset
            return [$(target)[offsetMethod]().top + offsetBase, targetSelector];
          }
        }).filter(function (item) {
          return item;
        }).sort(function (a, b) {
          return a[0] - b[0];
        }).forEach(function (item) {
          _this14._offsets.push(item[0]);
          _this14._targets.push(item[1]);
        });
      }
    }, {
      key: 'dispose',
      value: function dispose() {
        $.removeData(this._element, DATA_KEY);
        $(this._scrollElement).off(EVENT_KEY);

        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

    }, {
      key: '_getConfig',
      value: function _getConfig(config) {
        config = $.extend({}, Default, config);

        if (typeof config.target !== 'string') {
          var id = $(config.target).attr('id');
          if (!id) {
            id = Util.getUID(NAME);
            $(config.target).attr('id', id);
          }
          config.target = '#' + id;
        }

        Util.typeCheckConfig(NAME, config, DefaultType);

        return config;
      }
    }, {
      key: '_getScrollTop',
      value: function _getScrollTop() {
        return this._scrollElement === window ? this._scrollElement.scrollY : this._scrollElement.scrollTop;
      }
    }, {
      key: '_getScrollHeight',
      value: function _getScrollHeight() {
        return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
      }
    }, {
      key: '_process',
      value: function _process() {
        var scrollTop = this._getScrollTop() + this._config.offset;
        var scrollHeight = this._getScrollHeight();
        var maxScroll = this._config.offset + scrollHeight - this._scrollElement.offsetHeight;

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

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

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

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

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

          if (isActiveTarget) {
            this._activate(this._targets[i]);
          }
        }
      }
    }, {
      key: '_activate',
      value: function _activate(target) {
        this._activeTarget = target;

        this._clear();

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

        var $link = $(queries.join(','));

        if ($link.hasClass(ClassName.DROPDOWN_ITEM)) {
          $link.closest(Selector.DROPDOWN).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE);
          $link.addClass(ClassName.ACTIVE);
        } else {
          // todo (fat) this is kinda sus…
          // recursively add actives to tested nav-links
          $link.parents(Selector.LI).find(Selector.NAV_LINKS).addClass(ClassName.ACTIVE);
        }

        $(this._scrollElement).trigger(Event.ACTIVATE, {
          relatedTarget: target
        });
      }
    }, {
      key: '_clear',
      value: function _clear() {
        $(this._selector).filter(Selector.ACTIVE).removeClass(ClassName.ACTIVE);
      }

      // static

    }], [{
      key: '_jQueryInterface',
      value: function _jQueryInterface(config) {
        return this.each(function () {
          var data = $(this).data(DATA_KEY);
          var _config = typeof config === 'object' && config || null;

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

          if (typeof config === 'string') {
            data[config]();
          }
        });
      }
    }, {
      key: 'VERSION',
      get: function get() {
        return VERSION;
      }
    }, {
      key: 'Default',
      get: function get() {
        return Default;
      }
    }]);

    return ScrollSpy;
  })();

  $(window).on(Event.LOAD_DATA_API, function () {
    var scrollSpys = $.makeArray($(Selector.DATA_SPY));

    for (var i = scrollSpys.length; i--;) {
      var $spy = $(scrollSpys[i]);
      ScrollSpy._jQueryInterface.call($spy, $spy.data());
    }
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

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

  return ScrollSpy;
})(jQuery);

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): tab.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

var Tab = (function ($) {

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

  var NAME = 'tab';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.tab';
  var EVENT_KEY = '.' + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $.fn[NAME];
  var TRANSITION_DURATION = 150;

  var Event = {
    HIDE: 'hide' + EVENT_KEY,
    HIDDEN: 'hidden' + EVENT_KEY,
    SHOW: 'show' + EVENT_KEY,
    SHOWN: 'shown' + EVENT_KEY,
    CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY
  };

  var ClassName = {
    DROPDOWN_MENU: 'dropdown-menu',
    ACTIVE: 'active',
    FADE: 'fade',
    IN: 'in'
  };

  var Selector = {
    A: 'a',
    LI: 'li',
    DROPDOWN: '.dropdown',
    UL: 'ul:not(.dropdown-menu)',
    FADE_CHILD: '> .nav-item .fade, > .fade',
    ACTIVE: '.active',
    ACTIVE_CHILD: '> .nav-item > .active, > .active',
    DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"]',
    DROPDOWN_TOGGLE: '.dropdown-toggle',
    DROPDOWN_ACTIVE_CHILD: '> .dropdown-menu .active'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Tab = (function () {
    function Tab(element) {
      _classCallCheck(this, Tab);

      this._element = element;
    }

    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */

    // getters

    _createClass(Tab, [{
      key: 'show',

      // public

      value: function show() {
        var _this15 = this;

        if (this._element.parentNode && this._element.parentNode.nodeType === Node.ELEMENT_NODE && $(this._element).hasClass(ClassName.ACTIVE)) {
          return;
        }

        var target = undefined;
        var previous = undefined;
        var ulElement = $(this._element).closest(Selector.UL)[0];
        var selector = Util.getSelectorFromElement(this._element);

        if (ulElement) {
          previous = $.makeArray($(ulElement).find(Selector.ACTIVE));
          previous = previous[previous.length - 1];
        }

        var hideEvent = $.Event(Event.HIDE, {
          relatedTarget: this._element
        });

        var showEvent = $.Event(Event.SHOW, {
          relatedTarget: previous
        });

        if (previous) {
          $(previous).trigger(hideEvent);
        }

        $(this._element).trigger(showEvent);

        if (showEvent.isDefaultPrevented() || hideEvent.isDefaultPrevented()) {
          return;
        }

        if (selector) {
          target = $(selector)[0];
        }

        this._activate(this._element, ulElement);

        var complete = function complete() {
          var hiddenEvent = $.Event(Event.HIDDEN, {
            relatedTarget: _this15._element
          });

          var shownEvent = $.Event(Event.SHOWN, {
            relatedTarget: previous
          });

          $(previous).trigger(hiddenEvent);
          $(_this15._element).trigger(shownEvent);
        };

        if (target) {
          this._activate(target, target.parentNode, complete);
        } else {
          complete();
        }
      }
    }, {
      key: 'dispose',
      value: function dispose() {
        $.removeClass(this._element, DATA_KEY);
        this._element = null;
      }

      // private

    }, {
      key: '_activate',
      value: function _activate(element, container, callback) {
        var active = $(container).find(Selector.ACTIVE_CHILD)[0];
        var isTransitioning = callback && Util.supportsTransitionEnd() && (active && $(active).hasClass(ClassName.FADE) || Boolean($(container).find(Selector.FADE_CHILD)[0]));

        var complete = $.proxy(this._transitionComplete, this, element, active, isTransitioning, callback);

        if (active && isTransitioning) {
          $(active).one(Util.TRANSITION_END, complete).emulateTransitionEnd(TRANSITION_DURATION);
        } else {
          complete();
        }

        if (active) {
          $(active).removeClass(ClassName.IN);
        }
      }
    }, {
      key: '_transitionComplete',
      value: function _transitionComplete(element, active, isTransitioning, callback) {
        if (active) {
          $(active).removeClass(ClassName.ACTIVE);

          var dropdownChild = $(active).find(Selector.DROPDOWN_ACTIVE_CHILD)[0];

          if (dropdownChild) {
            $(dropdownChild).removeClass(ClassName.ACTIVE);
          }

          active.setAttribute('aria-expanded', false);
        }

        $(element).addClass(ClassName.ACTIVE);
        element.setAttribute('aria-expanded', true);

        if (isTransitioning) {
          Util.reflow(element);
          $(element).addClass(ClassName.IN);
        } else {
          $(element).removeClass(ClassName.FADE);
        }

        if (element.parentNode && $(element.parentNode).hasClass(ClassName.DROPDOWN_MENU)) {

          var dropdownElement = $(element).closest(Selector.DROPDOWN)[0];
          if (dropdownElement) {
            $(dropdownElement).find(Selector.DROPDOWN_TOGGLE).addClass(ClassName.ACTIVE);
          }

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

        if (callback) {
          callback();
        }
      }

      // static

    }], [{
      key: '_jQueryInterface',
      value: function _jQueryInterface(config) {
        return this.each(function () {
          var $this = $(this);
          var data = $this.data(DATA_KEY);

          if (!data) {
            data = data = new Tab(this);
            $this.data(DATA_KEY, data);
          }

          if (typeof config === 'string') {
            data[config]();
          }
        });
      }
    }, {
      key: 'VERSION',
      get: function get() {
        return VERSION;
      }
    }]);

    return Tab;
  })();

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
    event.preventDefault();
    Tab._jQueryInterface.call($(this), 'show');
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Tab._jQueryInterface;
  $.fn[NAME].Constructor = Tab;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Tab._jQueryInterface;
  };

  return Tab;
})(jQuery);

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): tooltip.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

var Tooltip = (function ($) {

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

  var NAME = 'tooltip';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.tooltip';
  var EVENT_KEY = '.' + DATA_KEY;
  var JQUERY_NO_CONFLICT = $.fn[NAME];
  var TRANSITION_DURATION = 150;
  var CLASS_PREFIX = 'bs-tether';

  var Default = {
    animation: true,
    template: '<div class="tooltip" role="tooltip">' + '<div class="tooltip-arrow"></div>' + '<div class="tooltip-inner"></div></div>',
    trigger: 'hover focus',
    title: '',
    delay: 0,
    html: false,
    selector: false,
    placement: 'top',
    offset: '0 0',
    constraints: []
  };

  var DefaultType = {
    animation: 'boolean',
    template: 'string',
    title: '(string|element|function)',
    trigger: 'string',
    delay: '(number|object)',
    html: 'boolean',
    selector: '(string|boolean)',
    placement: '(string|function)',
    offset: 'string',
    constraints: 'array'
  };

  var AttachmentMap = {
    TOP: 'bottom center',
    RIGHT: 'middle left',
    BOTTOM: 'top center',
    LEFT: 'middle right'
  };

  var HoverState = {
    IN: 'in',
    OUT: 'out'
  };

  var Event = {
    HIDE: 'hide' + EVENT_KEY,
    HIDDEN: 'hidden' + EVENT_KEY,
    SHOW: 'show' + EVENT_KEY,
    SHOWN: 'shown' + EVENT_KEY,
    INSERTED: 'inserted' + EVENT_KEY,
    CLICK: 'click' + EVENT_KEY,
    FOCUSIN: 'focusin' + EVENT_KEY,
    FOCUSOUT: 'focusout' + EVENT_KEY,
    MOUSEENTER: 'mouseenter' + EVENT_KEY,
    MOUSELEAVE: 'mouseleave' + EVENT_KEY
  };

  var ClassName = {
    FADE: 'fade',
    IN: 'in'
  };

  var Selector = {
    TOOLTIP: '.tooltip',
    TOOLTIP_INNER: '.tooltip-inner'
  };

  var TetherClass = {
    element: false,
    enabled: false
  };

  var Trigger = {
    HOVER: 'hover',
    FOCUS: 'focus',
    CLICK: 'click',
    MANUAL: 'manual'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Tooltip = (function () {
    function Tooltip(element, config) {
      _classCallCheck(this, Tooltip);

      // private
      this._isEnabled = true;
      this._timeout = 0;
      this._hoverState = '';
      this._activeTrigger = {};
      this._tether = null;

      // protected
      this.element = element;
      this.config = this._getConfig(config);
      this.tip = null;

      this._setListeners();
    }

    /**
     * ------------------------------------------------------------------------
     * jQuery
     * ------------------------------------------------------------------------
     */

    // getters

    _createClass(Tooltip, [{
      key: 'enable',

      // public

      value: function enable() {
        this._isEnabled = true;
      }
    }, {
      key: 'disable',
      value: function disable() {
        this._isEnabled = false;
      }
    }, {
      key: 'toggleEnabled',
      value: function toggleEnabled() {
        this._isEnabled = !this._isEnabled;
      }
    }, {
      key: 'toggle',
      value: function toggle(event) {
        if (event) {
          var dataKey = this.constructor.DATA_KEY;
          var context = $(event.currentTarget).data(dataKey);

          if (!context) {
            context = new this.constructor(event.currentTarget, this._getDelegateConfig());
            $(event.currentTarget).data(dataKey, context);
          }

          context._activeTrigger.click = !context._activeTrigger.click;

          if (context._isWithActiveTrigger()) {
            context._enter(null, context);
          } else {
            context._leave(null, context);
          }
        } else {

          if ($(this.getTipElement()).hasClass(ClassName.IN)) {
            this._leave(null, this);
            return;
          }

          this._enter(null, this);
        }
      }
    }, {
      key: 'dispose',
      value: function dispose() {
        clearTimeout(this._timeout);

        this.cleanupTether();

        $.removeData(this.element, this.constructor.DATA_KEY);

        $(this.element).off(this.constructor.EVENT_KEY);

        if (this.tip) {
          $(this.tip).remove();
        }

        this._isEnabled = null;
        this._timeout = null;
        this._hoverState = null;
        this._activeTrigger = null;
        this._tether = null;

        this.element = null;
        this.config = null;
        this.tip = null;
      }
    }, {
      key: 'show',
      value: function show() {
        var _this16 = this;

        var showEvent = $.Event(this.constructor.Event.SHOW);

        if (this.isWithContent() && this._isEnabled) {
          $(this.element).trigger(showEvent);

          var isInTheDom = $.contains(this.element.ownerDocument.documentElement, this.element);

          if (showEvent.isDefaultPrevented() || !isInTheDom) {
            return;
          }

          var tip = this.getTipElement();
          var tipId = Util.getUID(this.constructor.NAME);

          tip.setAttribute('id', tipId);
          this.element.setAttribute('aria-describedby', tipId);

          this.setContent();

          if (this.config.animation) {
            $(tip).addClass(ClassName.FADE);
          }

          var placement = typeof this.config.placement === 'function' ? this.config.placement.call(this, tip, this.element) : this.config.placement;

          var attachment = this._getAttachment(placement);

          $(tip).data(this.constructor.DATA_KEY, this).appendTo(document.body);

          $(this.element).trigger(this.constructor.Event.INSERTED);

          this._tether = new Tether({
            attachment: attachment,
            element: tip,
            target: this.element,
            classes: TetherClass,
            classPrefix: CLASS_PREFIX,
            offset: this.config.offset,
            constraints: this.config.constraints
          });

          Util.reflow(tip);
          this._tether.position();

          $(tip).addClass(ClassName.IN);

          var complete = function complete() {
            var prevHoverState = _this16._hoverState;
            _this16._hoverState = null;

            $(_this16.element).trigger(_this16.constructor.Event.SHOWN);

            if (prevHoverState === HoverState.OUT) {
              _this16._leave(null, _this16);
            }
          };

          if (Util.supportsTransitionEnd() && $(this.tip).hasClass(ClassName.FADE)) {
            $(this.tip).one(Util.TRANSITION_END, complete).emulateTransitionEnd(Tooltip._TRANSITION_DURATION);
            return;
          }

          complete();
        }
      }