rake update[v4-dev]

11 files changed, 473 insertions, 203 deletions

diff --git a/assets/javascripts/bootstrap/alert.js b/assets/javascripts/bootstrap/alert.js
index b332252..0550593 100644
--- a/assets/javascripts/bootstrap/alert.js
+++ b/assets/javascripts/bootstrap/alert.js
@@ -180,3 +180,4 @@ var Alert = function ($) {
 
   return Alert;
 }(jQuery);
+//# sourceMappingURL=alert.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/button.js b/assets/javascripts/bootstrap/button.js
index 03f787e..cd82242 100644
--- a/assets/javascripts/bootstrap/button.js
+++ b/assets/javascripts/bootstrap/button.js
@@ -62,6 +62,7 @@ var Button = function ($) {
 
     Button.prototype.toggle = function toggle() {
       var triggerChangeEvent = true;
+      var addAriaPressed = true;
       var rootElement = $(this._element).closest(Selector.DATA_TOGGLE)[0];
 
       if (rootElement) {
@@ -81,15 +82,21 @@ var Button = function ($) {
           }
 
           if (triggerChangeEvent) {
+            if (input.hasAttribute('disabled') || rootElement.hasAttribute('disabled') || input.classList.contains('disabled') || rootElement.classList.contains('disabled')) {
+              return;
+            }
             input.checked = !$(this._element).hasClass(ClassName.ACTIVE);
             $(input).trigger('change');
           }
 
           input.focus();
+          addAriaPressed = false;
         }
       }
 
-      this._element.setAttribute('aria-pressed', !$(this._element).hasClass(ClassName.ACTIVE));
+      if (addAriaPressed) {
+        this._element.setAttribute('aria-pressed', !$(this._element).hasClass(ClassName.ACTIVE));
+      }
 
       if (triggerChangeEvent) {
         $(this._element).toggleClass(ClassName.ACTIVE);
@@ -164,3 +171,4 @@ var Button = function ($) {
 
   return Button;
 }(jQuery);
+//# sourceMappingURL=button.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/carousel.js b/assets/javascripts/bootstrap/carousel.js
index c834f67..18186bc 100644
--- a/assets/javascripts/bootstrap/carousel.js
+++ b/assets/javascripts/bootstrap/carousel.js
@@ -28,6 +28,7 @@ var Carousel = function ($) {
   var TRANSITION_DURATION = 600;
   var ARROW_LEFT_KEYCODE = 37; // KeyboardEvent.which value for left arrow key
   var ARROW_RIGHT_KEYCODE = 39; // KeyboardEvent.which value for right arrow key
+  var TOUCHEVENT_COMPAT_WAIT = 500; // Time for mouse compat events to fire after touch
 
   var Default = {
     interval: 5000,
@@ -58,6 +59,7 @@ var Carousel = function ($) {
     KEYDOWN: 'keydown' + EVENT_KEY,
     MOUSEENTER: 'mouseenter' + EVENT_KEY,
     MOUSELEAVE: 'mouseleave' + EVENT_KEY,
+    TOUCHEND: 'touchend' + EVENT_KEY,
     LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY,
     CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY
   };
@@ -100,6 +102,8 @@ var Carousel = function ($) {
       this._isPaused = false;
       this._isSliding = false;
 
+      this.touchTimeout = null;
+
       this._config = this._getConfig(config);
       this._element = $(element)[0];
       this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0];
@@ -112,10 +116,9 @@ var Carousel = function ($) {
     // public
 
     Carousel.prototype.next = function next() {
-      if (this._isSliding) {
-        throw new Error('Carousel is sliding');
+      if (!this._isSliding) {
+        this._slide(Direction.NEXT);
       }
-      this._slide(Direction.NEXT);
     };
 
     Carousel.prototype.nextWhenVisible = function nextWhenVisible() {
@@ -126,10 +129,9 @@ var Carousel = function ($) {
     };
 
     Carousel.prototype.prev = function prev() {
-      if (this._isSliding) {
-        throw new Error('Carousel is sliding');
+      if (!this._isSliding) {
+        this._slide(Direction.PREV);
       }
-      this._slide(Direction.PREVIOUS);
     };
 
     Carousel.prototype.pause = function pause(event) {
@@ -185,7 +187,7 @@ var Carousel = function ($) {
         return;
       }
 
-      var direction = index > activeIndex ? Direction.NEXT : Direction.PREVIOUS;
+      var direction = index > activeIndex ? Direction.NEXT : Direction.PREV;
 
       this._slide(direction, this._items[index]);
     };
@@ -221,12 +223,30 @@ var Carousel = function ($) {
         });
       }
 
-      if (this._config.pause === 'hover' && !('ontouchstart' in document.documentElement)) {
+      if (this._config.pause === 'hover') {
         $(this._element).on(Event.MOUSEENTER, function (event) {
           return _this2.pause(event);
         }).on(Event.MOUSELEAVE, function (event) {
           return _this2.cycle(event);
         });
+        if ('ontouchstart' in document.documentElement) {
+          // if it's a touch-enabled device, mouseenter/leave are fired as
+          // part of the mouse compatibility events on first tap - the carousel
+          // would stop cycling until user tapped out of it;
+          // here, we listen for touchend, explicitly pause the carousel
+          // (as if it's the second time we tap on it, mouseenter compat event
+          // is NOT fired) and after a timeout (to allow for mouse compatibility
+          // events to fire) we explicitly restart cycling
+          $(this._element).on(Event.TOUCHEND, function () {
+            _this2.pause();
+            if (_this2.touchTimeout) {
+              clearTimeout(_this2.touchTimeout);
+            }
+            _this2.touchTimeout = setTimeout(function (event) {
+              return _this2.cycle(event);
+            }, TOUCHEVENT_COMPAT_WAIT + _this2._config.interval);
+          });
+        }
       }
     };
 
@@ -256,7 +276,7 @@ var Carousel = function ($) {
 
     Carousel.prototype._getItemByDirection = function _getItemByDirection(direction, activeElement) {
       var isNextDirection = direction === Direction.NEXT;
-      var isPrevDirection = direction === Direction.PREVIOUS;
+      var isPrevDirection = direction === Direction.PREV;
       var activeIndex = this._getItemIndex(activeElement);
       var lastItemIndex = this._items.length - 1;
       var isGoingToWrap = isPrevDirection && activeIndex === 0 || isNextDirection && activeIndex === lastItemIndex;
@@ -265,16 +285,20 @@ var Carousel = function ($) {
         return activeElement;
       }
 
-      var delta = direction === Direction.PREVIOUS ? -1 : 1;
+      var delta = direction === Direction.PREV ? -1 : 1;
       var itemIndex = (activeIndex + delta) % this._items.length;
 
       return itemIndex === -1 ? this._items[this._items.length - 1] : this._items[itemIndex];
     };
 
     Carousel.prototype._triggerSlideEvent = function _triggerSlideEvent(relatedTarget, eventDirectionName) {
+      var targetIndex = this._getItemIndex(relatedTarget);
+      var fromIndex = this._getItemIndex($(this._element).find(Selector.ACTIVE_ITEM)[0]);
       var slideEvent = $.Event(Event.SLIDE, {
         relatedTarget: relatedTarget,
-        direction: eventDirectionName
+        direction: eventDirectionName,
+        from: fromIndex,
+        to: targetIndex
       });
 
       $(this._element).trigger(slideEvent);
@@ -298,8 +322,9 @@ var Carousel = function ($) {
       var _this3 = this;
 
       var activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0];
+      var activeElementIndex = this._getItemIndex(activeElement);
       var nextElement = element || activeElement && this._getItemByDirection(direction, activeElement);
-
+      var nextElementIndex = this._getItemIndex(nextElement);
       var isCycling = Boolean(this._interval);
 
       var directionalClassName = void 0;
@@ -341,7 +366,9 @@ var Carousel = function ($) {
 
       var slidEvent = $.Event(Event.SLID, {
         relatedTarget: nextElement,
-        direction: eventDirectionName
+        direction: eventDirectionName,
+        from: activeElementIndex,
+        to: nextElementIndex
       });
 
       if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.SLIDE)) {
@@ -483,3 +510,4 @@ var Carousel = function ($) {
 
   return Carousel;
 }(jQuery);
+//# sourceMappingURL=carousel.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/collapse.js b/assets/javascripts/bootstrap/collapse.js
index 2969a60..0e2bc75 100644
--- a/assets/javascripts/bootstrap/collapse.js
+++ b/assets/javascripts/bootstrap/collapse.js
@@ -58,7 +58,7 @@ var Collapse = function ($) {
   };
 
   var Selector = {
-    ACTIVES: '.card > .show, .card > .collapsing',
+    ACTIVES: '.show, .collapsing',
     DATA_TOGGLE: '[data-toggle="collapse"]'
   };
 
@@ -103,11 +103,7 @@ var Collapse = function ($) {
     Collapse.prototype.show = function show() {
       var _this = this;
 
-      if (this._isTransitioning) {
-        throw new Error('Collapse is transitioning');
-      }
-
-      if ($(this._element).hasClass(ClassName.SHOW)) {
+      if (this._isTransitioning || $(this._element).hasClass(ClassName.SHOW)) {
         return;
       }
 
@@ -115,7 +111,7 @@ var Collapse = function ($) {
       var activesData = void 0;
 
       if (this._parent) {
-        actives = $.makeArray($(this._parent).find(Selector.ACTIVES));
+        actives = $.makeArray($(this._parent).children().children(Selector.ACTIVES));
         if (!actives.length) {
           actives = null;
         }
@@ -146,7 +142,6 @@ var Collapse = function ($) {
       $(this._element).removeClass(ClassName.COLLAPSE).addClass(ClassName.COLLAPSING);
 
       this._element.style[dimension] = 0;
-      this._element.setAttribute('aria-expanded', true);
 
       if (this._triggerArray.length) {
         $(this._triggerArray).removeClass(ClassName.COLLAPSED).attr('aria-expanded', true);
@@ -180,11 +175,7 @@ var Collapse = function ($) {
     Collapse.prototype.hide = function hide() {
       var _this2 = this;
 
-      if (this._isTransitioning) {
-        throw new Error('Collapse is transitioning');
-      }
-
-      if (!$(this._element).hasClass(ClassName.SHOW)) {
+      if (this._isTransitioning || !$(this._element).hasClass(ClassName.SHOW)) {
         return;
       }
 
@@ -195,16 +186,13 @@ var Collapse = function ($) {
       }
 
       var dimension = this._getDimension();
-      var offsetDimension = dimension === Dimension.WIDTH ? 'offsetWidth' : 'offsetHeight';
 
-      this._element.style[dimension] = this._element[offsetDimension] + 'px';
+      this._element.style[dimension] = this._element.getBoundingClientRect()[dimension] + 'px';
 
       Util.reflow(this._element);
 
       $(this._element).addClass(ClassName.COLLAPSING).removeClass(ClassName.COLLAPSE).removeClass(ClassName.SHOW);
 
-      this._element.setAttribute('aria-expanded', false);
-
       if (this._triggerArray.length) {
         $(this._triggerArray).addClass(ClassName.COLLAPSED).attr('aria-expanded', false);
       }
@@ -270,7 +258,6 @@ var Collapse = function ($) {
     Collapse.prototype._addAriaAndCollapsedClass = function _addAriaAndCollapsedClass(element, triggerArray) {
       if (element) {
         var isOpen = $(element).hasClass(ClassName.SHOW);
-        element.setAttribute('aria-expanded', isOpen);
 
         if (triggerArray.length) {
           $(triggerArray).toggleClass(ClassName.COLLAPSED, !isOpen).attr('aria-expanded', isOpen);
@@ -331,7 +318,9 @@ var Collapse = function ($) {
    */
 
   $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
-    event.preventDefault();
+    if (!/input|textarea/i.test(event.target.tagName)) {
+      event.preventDefault();
+    }
 
     var target = Collapse._getTargetFromElement(this);
     var data = $(target).data(DATA_KEY);
@@ -355,3 +344,4 @@ var Collapse = function ($) {
 
   return Collapse;
 }(jQuery);
+//# sourceMappingURL=collapse.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/dropdown.js b/assets/javascripts/bootstrap/dropdown.js
index 87fa677..a2593e1 100644
--- a/assets/javascripts/bootstrap/dropdown.js
+++ b/assets/javascripts/bootstrap/dropdown.js
@@ -1,3 +1,5 @@
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
 var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
 
 function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
@@ -12,6 +14,14 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
 var Dropdown = function ($) {
 
   /**
+   * Check for Popper dependency
+   * Popper - https://popper.js.org
+   */
+  if (typeof Popper === 'undefined') {
+    throw new Error('Bootstrap dropdown require Popper.js (https://popper.js.org)');
+  }
+
+  /**
    * ------------------------------------------------------------------------
    * Constants
    * ------------------------------------------------------------------------
@@ -24,9 +34,12 @@ var Dropdown = function ($) {
   var DATA_API_KEY = '.data-api';
   var JQUERY_NO_CONFLICT = $.fn[NAME];
   var ESCAPE_KEYCODE = 27; // KeyboardEvent.which value for Escape (Esc) key
+  var SPACE_KEYCODE = 32; // KeyboardEvent.which value for space key
+  var TAB_KEYCODE = 9; // KeyboardEvent.which value for tab key
   var ARROW_UP_KEYCODE = 38; // KeyboardEvent.which value for up arrow key
   var ARROW_DOWN_KEYCODE = 40; // KeyboardEvent.which value for down arrow key
   var RIGHT_MOUSE_BUTTON_WHICH = 3; // MouseEvent.which value for the right button (assuming a right-handed mouse)
+  var REGEXP_KEYDOWN = new RegExp(ARROW_UP_KEYCODE + '|' + ARROW_DOWN_KEYCODE + '|' + ESCAPE_KEYCODE);
 
   var Event = {
     HIDE: 'hide' + EVENT_KEY,
@@ -35,24 +48,43 @@ var Dropdown = function ($) {
     SHOWN: 'shown' + EVENT_KEY,
     CLICK: 'click' + EVENT_KEY,
     CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY,
-    FOCUSIN_DATA_API: 'focusin' + EVENT_KEY + DATA_API_KEY,
-    KEYDOWN_DATA_API: 'keydown' + EVENT_KEY + DATA_API_KEY
+    KEYDOWN_DATA_API: 'keydown' + EVENT_KEY + DATA_API_KEY,
+    KEYUP_DATA_API: 'keyup' + EVENT_KEY + DATA_API_KEY
   };
 
   var ClassName = {
-    BACKDROP: 'dropdown-backdrop',
     DISABLED: 'disabled',
-    SHOW: 'show'
+    SHOW: 'show',
+    DROPUP: 'dropup',
+    MENURIGHT: 'dropdown-menu-right',
+    MENULEFT: 'dropdown-menu-left'
   };
 
   var Selector = {
-    BACKDROP: '.dropdown-backdrop',
     DATA_TOGGLE: '[data-toggle="dropdown"]',
     FORM_CHILD: '.dropdown form',
-    ROLE_MENU: '[role="menu"]',
-    ROLE_LISTBOX: '[role="listbox"]',
+    MENU: '.dropdown-menu',
     NAVBAR_NAV: '.navbar-nav',
-    VISIBLE_ITEMS: '[role="menu"] li:not(.disabled) a, ' + '[role="listbox"] li:not(.disabled) a'
+    VISIBLE_ITEMS: '.dropdown-menu .dropdown-item:not(.disabled)'
+  };
+
+  var AttachmentMap = {
+    TOP: 'top-start',
+    TOPEND: 'top-end',
+    BOTTOM: 'bottom-start',
+    BOTTOMEND: 'bottom-end'
+  };
+
+  var Default = {
+    placement: AttachmentMap.BOTTOM,
+    offset: 0,
+    flip: true
+  };
+
+  var DefaultType = {
+    placement: 'string',
+    offset: '(number|string)',
+    flip: 'boolean'
   };
 
   /**
@@ -62,10 +94,13 @@ var Dropdown = function ($) {
    */
 
   var Dropdown = function () {
-    function Dropdown(element) {
+    function Dropdown(element, config) {
       _classCallCheck(this, Dropdown);
 
       this._element = element;
+      this._popper = null;
+      this._config = this._getConfig(config);
+      this._menu = this._getMenuElement();
 
       this._addEventListeners();
     }
@@ -75,58 +110,130 @@ var Dropdown = function ($) {
     // public
 
     Dropdown.prototype.toggle = function toggle() {
-      if (this.disabled || $(this).hasClass(ClassName.DISABLED)) {
-        return false;
+      if (this._element.disabled || $(this._element).hasClass(ClassName.DISABLED)) {
+        return;
       }
 
-      var parent = Dropdown._getParentFromElement(this);
-      var isActive = $(parent).hasClass(ClassName.SHOW);
+      var parent = Dropdown._getParentFromElement(this._element);
+      var isActive = $(this._menu).hasClass(ClassName.SHOW);
 
       Dropdown._clearMenus();
 
       if (isActive) {
-        return false;
-      }
-
-      if ('ontouchstart' in document.documentElement && !$(parent).closest(Selector.NAVBAR_NAV).length) {
-
-        // if mobile we use a backdrop because click events don't delegate
-        var dropdown = document.createElement('div');
-        dropdown.className = ClassName.BACKDROP;
-        $(dropdown).insertBefore(this);
-        $(dropdown).on('click', Dropdown._clearMenus);
+        return;
       }
 
       var relatedTarget = {
-        relatedTarget: this
+        relatedTarget: this._element
       };
       var showEvent = $.Event(Event.SHOW, relatedTarget);
 
       $(parent).trigger(showEvent);
 
       if (showEvent.isDefaultPrevented()) {
-        return false;
+        return;
       }
 
-      this.focus();
-      this.setAttribute('aria-expanded', true);
+      var element = this._element;
+      // for dropup with alignment we use the parent as popper container
+      if ($(parent).hasClass(ClassName.DROPUP)) {
+        if ($(this._menu).hasClass(ClassName.MENULEFT) || $(this._menu).hasClass(ClassName.MENURIGHT)) {
+          element = parent;
+        }
+      }
+      this._popper = new Popper(element, this._menu, {
+        placement: this._getPlacement(),
+        modifiers: {
+          offset: {
+            offset: this._config.offset
+          },
+          flip: {
+            enabled: this._config.flip
+          }
+        }
+      });
+
+      // if this is a touch-enabled device we add extra
+      // empty mouseover listeners to the body's immediate children;
+      // only needed because of broken event delegation on iOS
+      // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
+      if ('ontouchstart' in document.documentElement && !$(parent).closest(Selector.NAVBAR_NAV).length) {
+        $('body').children().on('mouseover', null, $.noop);
+      }
 
-      $(parent).toggleClass(ClassName.SHOW);
-      $(parent).trigger($.Event(Event.SHOWN, relatedTarget));
+      this._element.focus();
+      this._element.setAttribute('aria-expanded', true);
 
-      return false;
+      $(this._menu).toggleClass(ClassName.SHOW);
+      $(parent).toggleClass(ClassName.SHOW).trigger($.Event(Event.SHOWN, relatedTarget));
     };
 
     Dropdown.prototype.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY);
       $(this._element).off(EVENT_KEY);
       this._element = null;
+      this._menu = null;
+      if (this._popper !== null) {
+        this._popper.destroy();
+      }
+      this._popper = null;
+    };
+
+    Dropdown.prototype.update = function update() {
+      if (this._popper !== null) {
+        this._popper.scheduleUpdate();
+      }
     };
 
     // private
 
     Dropdown.prototype._addEventListeners = function _addEventListeners() {
-      $(this._element).on(Event.CLICK, this.toggle);
+      var _this = this;
+
+      $(this._element).on(Event.CLICK, function (event) {
+        event.preventDefault();
+        event.stopPropagation();
+        _this.toggle();
+      });
+    };
+
+    Dropdown.prototype._getConfig = function _getConfig(config) {
+      var elementData = $(this._element).data();
+      if (elementData.placement !== undefined) {
+        elementData.placement = AttachmentMap[elementData.placement.toUpperCase()];
+      }
+
+      config = $.extend({}, this.constructor.Default, $(this._element).data(), config);
+
+      Util.typeCheckConfig(NAME, config, this.constructor.DefaultType);
+
+      return config;
+    };
+
+    Dropdown.prototype._getMenuElement = function _getMenuElement() {
+      if (!this._menu) {
+        var parent = Dropdown._getParentFromElement(this._element);
+        this._menu = $(parent).find(Selector.MENU)[0];
+      }
+      return this._menu;
+    };
+
+    Dropdown.prototype._getPlacement = function _getPlacement() {
+      var $parentDropdown = $(this._element).parent();
+      var placement = this._config.placement;
+
+      // Handle dropup
+      if ($parentDropdown.hasClass(ClassName.DROPUP) || this._config.placement === AttachmentMap.TOP) {
+        placement = AttachmentMap.TOP;
+        if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
+          placement = AttachmentMap.TOPEND;
+        }
+      } else {
+        if ($(this._menu).hasClass(ClassName.MENURIGHT)) {
+          placement = AttachmentMap.BOTTOMEND;
+        }
+      }
+      return placement;
     };
 
     // static
@@ -134,9 +241,10 @@ var Dropdown = function ($) {
     Dropdown._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
         var data = $(this).data(DATA_KEY);
+        var _config = (typeof config === 'undefined' ? 'undefined' : _typeof(config)) === 'object' ? config : null;
 
         if (!data) {
-          data = new Dropdown(this);
+          data = new Dropdown(this, _config);
           $(this).data(DATA_KEY, data);
         }
 
@@ -144,34 +252,34 @@ var Dropdown = function ($) {
           if (data[config] === undefined) {
             throw new Error('No method named "' + config + '"');
           }
-          data[config].call(this);
+          data[config]();
         }
       });
     };
 
     Dropdown._clearMenus = function _clearMenus(event) {
-      if (event && event.which === RIGHT_MOUSE_BUTTON_WHICH) {
+      if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH || event.type === 'keyup' && event.which !== TAB_KEYCODE)) {
         return;
       }
 
-      var backdrop = $(Selector.BACKDROP)[0];
-      if (backdrop) {
-        backdrop.parentNode.removeChild(backdrop);
-      }
-
       var toggles = $.makeArray($(Selector.DATA_TOGGLE));
-
       for (var i = 0; i < toggles.length; i++) {
         var parent = Dropdown._getParentFromElement(toggles[i]);
+        var context = $(toggles[i]).data(DATA_KEY);
         var relatedTarget = {
           relatedTarget: toggles[i]
         };
 
+        if (!context) {
+          continue;
+        }
+
+        var dropdownMenu = context._menu;
         if (!$(parent).hasClass(ClassName.SHOW)) {
           continue;
         }
 
-        if (event && (event.type === 'click' && /input|textarea/i.test(event.target.tagName) || event.type === 'focusin') && $.contains(parent, event.target)) {
+        if (event && (event.type === 'click' && /input|textarea/i.test(event.target.tagName) || event.type === 'keyup' && event.which === TAB_KEYCODE) && $.contains(parent, event.target)) {
           continue;
         }
 
@@ -181,8 +289,15 @@ var Dropdown = function ($) {
           continue;
         }
 
+        // if this is a touch-enabled device we remove the extra
+        // empty mouseover listeners we added for iOS support
+        if ('ontouchstart' in document.documentElement) {
+          $('body').children().off('mouseover', null, $.noop);
+        }
+
         toggles[i].setAttribute('aria-expanded', 'false');
 
+        $(dropdownMenu).removeClass(ClassName.SHOW);
         $(parent).removeClass(ClassName.SHOW).trigger($.Event(Event.HIDDEN, relatedTarget));
       }
     };
@@ -199,7 +314,7 @@ var Dropdown = function ($) {
     };
 
     Dropdown._dataApiKeydownHandler = function _dataApiKeydownHandler(event) {
-      if (!/(38|40|27|32)/.test(event.which) || /input|textarea/i.test(event.target.tagName)) {
+      if (!REGEXP_KEYDOWN.test(event.which) || /button/i.test(event.target.tagName) && event.which === SPACE_KEYCODE || /input|textarea/i.test(event.target.tagName)) {
         return;
       }
 
@@ -213,7 +328,7 @@ var Dropdown = function ($) {
       var parent = Dropdown._getParentFromElement(this);
       var isActive = $(parent).hasClass(ClassName.SHOW);
 
-      if (!isActive && event.which !== ESCAPE_KEYCODE || isActive && event.which === ESCAPE_KEYCODE) {
+      if (!isActive && (event.which !== ESCAPE_KEYCODE || event.which !== SPACE_KEYCODE) || isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE)) {
 
         if (event.which === ESCAPE_KEYCODE) {
           var toggle = $(parent).find(Selector.DATA_TOGGLE)[0];
@@ -254,6 +369,16 @@ var Dropdown = function ($) {
       get: function get() {
         return VERSION;
       }
+    }, {
+      key: 'Default',
+      get: function get() {
+        return Default;
+      }
+    }, {
+      key: 'DefaultType',
+      get: function get() {
+        return DefaultType;
+      }
     }]);
 
     return Dropdown;
@@ -265,7 +390,11 @@ var Dropdown = function ($) {
    * ------------------------------------------------------------------------
    */
 
-  $(document).on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler).on(Event.KEYDOWN_DATA_API, Selector.ROLE_MENU, Dropdown._dataApiKeydownHandler).on(Event.KEYDOWN_DATA_API, Selector.ROLE_LISTBOX, Dropdown._dataApiKeydownHandler).on(Event.CLICK_DATA_API + ' ' + Event.FOCUSIN_DATA_API, Dropdown._clearMenus).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, Dropdown.prototype.toggle).on(Event.CLICK_DATA_API, Selector.FORM_CHILD, function (e) {
+  $(document).on(Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown._dataApiKeydownHandler).on(Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown._dataApiKeydownHandler).on(Event.CLICK_DATA_API + ' ' + Event.KEYUP_DATA_API, Dropdown._clearMenus).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
+    event.preventDefault();
+    event.stopPropagation();
+    Dropdown._jQueryInterface.call($(this), 'toggle');
+  }).on(Event.CLICK_DATA_API, Selector.FORM_CHILD, function (e) {
     e.stopPropagation();
   });
 
@@ -283,4 +412,5 @@ var Dropdown = function ($) {
   };
 
   return Dropdown;
-}(jQuery);
+}(jQuery); /* global Popper */
+//# sourceMappingURL=dropdown.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/modal.js b/assets/javascripts/bootstrap/modal.js
index c6113e9..563d8f5 100644
--- a/assets/javascripts/bootstrap/modal.js
+++ b/assets/javascripts/bootstrap/modal.js
@@ -69,7 +69,8 @@ var Modal = function ($) {
     DIALOG: '.modal-dialog',
     DATA_TOGGLE: '[data-toggle="modal"]',
     DATA_DISMISS: '[data-dismiss="modal"]',
-    FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top'
+    FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
+    NAVBAR_TOGGLER: '.navbar-toggler'
   };
 
   /**
@@ -89,7 +90,6 @@ var Modal = function ($) {
       this._isShown = false;
       this._isBodyOverflowing = false;
       this._ignoreBackdropClick = false;
-      this._isTransitioning = false;
       this._originalBodyPadding = 0;
       this._scrollbarWidth = 0;
     }
@@ -106,12 +106,13 @@ var Modal = function ($) {
       var _this = this;
 
       if (this._isTransitioning) {
-        throw new Error('Modal is transitioning');
+        return;
       }
 
       if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.FADE)) {
         this._isTransitioning = true;
       }
+
       var showEvent = $.Event(Event.SHOW, {
         relatedTarget: relatedTarget
       });
@@ -156,16 +157,18 @@ var Modal = function ($) {
         event.preventDefault();
       }
 
-      if (this._isTransitioning) {
-        throw new Error('Modal is transitioning');
+      if (this._isTransitioning || !this._isShown) {
+        return;
       }
 
       var transition = Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.FADE);
+
       if (transition) {
         this._isTransitioning = true;
       }
 
       var hideEvent = $.Event(Event.HIDE);
+
       $(this._element).trigger(hideEvent);
 
       if (!this._isShown || hideEvent.isDefaultPrevented()) {
@@ -185,6 +188,7 @@ var Modal = function ($) {
       $(this._dialog).off(Event.MOUSEDOWN_DISMISS);
 
       if (transition) {
+
         $(this._element).one(Util.TRANSITION_END, function (event) {
           return _this2._hideModal(event);
         }).emulateTransitionEnd(TRANSITION_DURATION);
@@ -205,10 +209,13 @@ var Modal = function ($) {
       this._isShown = null;
       this._isBodyOverflowing = null;
       this._ignoreBackdropClick = null;
-      this._originalBodyPadding = null;
       this._scrollbarWidth = null;
     };
 
+    Modal.prototype.handleUpdate = function handleUpdate() {
+      this._adjustDialog();
+    };
+
     // private
 
     Modal.prototype._getConfig = function _getConfig(config) {
@@ -277,6 +284,7 @@ var Modal = function ($) {
       if (this._isShown && this._config.keyboard) {
         $(this._element).on(Event.KEYDOWN_DISMISS, function (event) {
           if (event.which === ESCAPE_KEYCODE) {
+            event.preventDefault();
             _this5.hide();
           }
         });
@@ -290,7 +298,7 @@ var Modal = function ($) {
 
       if (this._isShown) {
         $(window).on(Event.RESIZE, function (event) {
-          return _this6._handleUpdate(event);
+          return _this6.handleUpdate(event);
         });
       } else {
         $(window).off(Event.RESIZE);
@@ -301,7 +309,7 @@ var Modal = function ($) {
       var _this7 = this;
 
       this._element.style.display = 'none';
-      this._element.setAttribute('aria-hidden', 'true');
+      this._element.setAttribute('aria-hidden', true);
       this._isTransitioning = false;
       this._showBackdrop(function () {
         $(document.body).removeClass(ClassName.OPEN);
@@ -391,10 +399,6 @@ var Modal = function ($) {
     // todo (fat): these should probably be refactored out of modal.js
     // ----------------------------------------------------------------------
 
-    Modal.prototype._handleUpdate = function _handleUpdate() {
-      this._adjustDialog();
-    };
-
     Modal.prototype._adjustDialog = function _adjustDialog() {
       var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;
 
@@ -418,17 +422,55 @@ var Modal = function ($) {
     };
 
     Modal.prototype._setScrollbar = function _setScrollbar() {
-      var bodyPadding = parseInt($(Selector.FIXED_CONTENT).css('padding-right') || 0, 10);
-
-      this._originalBodyPadding = document.body.style.paddingRight || '';
+      var _this9 = this;
 
       if (this._isBodyOverflowing) {
-        document.body.style.paddingRight = bodyPadding + this._scrollbarWidth + 'px';
+        // Note: DOMNode.style.paddingRight returns the actual value or '' if not set
+        //   while $(DOMNode).css('padding-right') returns the calculated value or 0 if not set
+
+        // Adjust fixed content padding
+        $(Selector.FIXED_CONTENT).each(function (index, element) {
+          var actualPadding = $(element)[0].style.paddingRight;
+          var calculatedPadding = $(element).css('padding-right');
+          $(element).data('padding-right', actualPadding).css('padding-right', parseFloat(calculatedPadding) + _this9._scrollbarWidth + 'px');
+        });
+
+        // Adjust navbar-toggler margin
+        $(Selector.NAVBAR_TOGGLER).each(function (index, element) {
+          var actualMargin = $(element)[0].style.marginRight;
+          var calculatedMargin = $(element).css('margin-right');
+          $(element).data('margin-right', actualMargin).css('margin-right', parseFloat(calculatedMargin) + _this9._scrollbarWidth + 'px');
+        });
+
+        // Adjust body padding
+        var actualPadding = document.body.style.paddingRight;
+        var calculatedPadding = $('body').css('padding-right');
+        $('body').data('padding-right', actualPadding).css('padding-right', parseFloat(calculatedPadding) + this._scrollbarWidth + 'px');
       }
     };
 
     Modal.prototype._resetScrollbar = function _resetScrollbar() {
-      document.body.style.paddingRight = this._originalBodyPadding;
+      // Restore fixed content padding
+      $(Selector.FIXED_CONTENT).each(function (index, element) {
+        var padding = $(element).data('padding-right');
+        if (typeof padding !== 'undefined') {
+          $(element).css('padding-right', padding).removeData('padding-right');
+        }
+      });
+
+      // Restore navbar-toggler margin
+      $(Selector.NAVBAR_TOGGLER).each(function (index, element) {
+        var margin = $(element).data('margin-right');
+        if (typeof margin !== 'undefined') {
+          $(element).css('margin-right', margin).removeData('margin-right');
+        }
+      });
+
+      // Restore body padding
+      var padding = $('body').data('padding-right');
+      if (typeof padding !== 'undefined') {
+        $('body').css('padding-right', padding).removeData('padding-right');
+      }
     };
 
     Modal.prototype._getScrollbarWidth = function _getScrollbarWidth() {
@@ -436,7 +478,7 @@ var Modal = function ($) {
       var scrollDiv = document.createElement('div');
       scrollDiv.className = ClassName.SCROLLBAR_MEASURER;
       document.body.appendChild(scrollDiv);
-      var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
+      var scrollbarWidth = scrollDiv.getBoundingClientRect().width - scrollDiv.clientWidth;
       document.body.removeChild(scrollDiv);
       return scrollbarWidth;
     };
@@ -486,7 +528,7 @@ var Modal = function ($) {
    */
 
   $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
-    var _this9 = this;
+    var _this10 = this;
 
     var target = void 0;
     var selector = Util.getSelectorFromElement(this);
@@ -508,8 +550,8 @@ var Modal = function ($) {
       }
 
       $target.one(Event.HIDDEN, function () {
-        if ($(_this9).is(':visible')) {
-          _this9.focus();
+        if ($(_this10).is(':visible')) {
+          _this10.focus();
         }
       });
     });
@@ -532,3 +574,4 @@ var Modal = function ($) {
 
   return Modal;
 }(jQuery);
+//# sourceMappingURL=modal.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/popover.js b/assets/javascripts/bootstrap/popover.js
index 5ca8c0c..1e82e82 100644
--- a/assets/javascripts/bootstrap/popover.js
+++ b/assets/javascripts/bootstrap/popover.js
@@ -28,12 +28,14 @@ var Popover = function ($) {
   var DATA_KEY = 'bs.popover';
   var EVENT_KEY = '.' + DATA_KEY;
   var JQUERY_NO_CONFLICT = $.fn[NAME];
+  var CLASS_PREFIX = 'bs-popover';
+  var BSCLS_PREFIX_REGEX = new RegExp('(^|\\s)' + CLASS_PREFIX + '\\S+', 'g');
 
   var Default = $.extend({}, Tooltip.Default, {
     placement: 'right',
     trigger: 'click',
     content: '',
-    template: '<div class="popover" role="tooltip">' + '<h3 class="popover-title"></h3>' + '<div class="popover-content"></div></div>'
+    template: '<div class="popover" role="tooltip">' + '<div class="arrow" x-arrow></div>' + '<h3 class="popover-title"></h3>' + '<div class="popover-content"></div></div>'
   });
 
   var DefaultType = $.extend({}, Tooltip.DefaultType, {
@@ -84,6 +86,10 @@ var Popover = function ($) {
       return this.getTitle() || this._getContent();
     };
 
+    Popover.prototype.addAttachmentClass = function addAttachmentClass(attachment) {
+      $(this.getTipElement()).addClass(CLASS_PREFIX + '-' + attachment);
+    };
+
     Popover.prototype.getTipElement = function getTipElement() {
       return this.tip = this.tip || $(this.config.template)[0];
     };
@@ -96,8 +102,6 @@ var Popover = function ($) {
       this.setElementContent($tip.find(Selector.CONTENT), this._getContent());
 
       $tip.removeClass(ClassName.FADE + ' ' + ClassName.SHOW);
-
-      this.cleanupTether();
     };
 
     // private
@@ -106,6 +110,14 @@ var Popover = function ($) {
       return this.element.getAttribute('data-content') || (typeof this.config.content === 'function' ? this.config.content.call(this.element) : this.config.content);
     };
 
+    Popover.prototype._cleanTipClass = function _cleanTipClass() {
+      var $tip = $(this.getTipElement());
+      var tabClass = $tip.attr('class').match(BSCLS_PREFIX_REGEX);
+      if (tabClass !== null && tabClass.length > 0) {
+        $tip.removeClass(tabClass.join(''));
+      }
+    };
+
     // static
 
     Popover._jQueryInterface = function _jQueryInterface(config) {
@@ -190,3 +202,4 @@ var Popover = function ($) {
 
   return Popover;
 }(jQuery);
+//# sourceMappingURL=popover.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/scrollspy.js b/assets/javascripts/bootstrap/scrollspy.js
index e2ee2e3..a332f96 100644
--- a/assets/javascripts/bootstrap/scrollspy.js
+++ b/assets/javascripts/bootstrap/scrollspy.js
@@ -47,18 +47,15 @@ var ScrollSpy = function ($) {
   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_LIST_GROUP: '.nav, .list-group',
     NAV_LINKS: '.nav-link',
+    LIST_ITEMS: '.list-group-item',
     DROPDOWN: '.dropdown',
     DROPDOWN_ITEMS: '.dropdown-item',
     DROPDOWN_TOGGLE: '.dropdown-toggle'
@@ -84,7 +81,7 @@ var ScrollSpy = function ($) {
       this._element = element;
       this._scrollElement = element.tagName === 'BODY' ? window : element;
       this._config = this._getConfig(config);
-      this._selector = this._config.target + ' ' + Selector.NAV_LINKS + ',' + (this._config.target + ' ' + Selector.DROPDOWN_ITEMS);
+      this._selector = this._config.target + ' ' + Selector.NAV_LINKS + ',' + (this._config.target + ' ' + Selector.LIST_ITEMS + ',') + (this._config.target + ' ' + Selector.DROPDOWN_ITEMS);
       this._offsets = [];
       this._targets = [];
       this._activeTarget = null;
@@ -126,9 +123,12 @@ var ScrollSpy = function ($) {
           target = $(targetSelector)[0];
         }
 
-        if (target && (target.offsetWidth || target.offsetHeight)) {
-          // todo (fat): remove sketch reliance on jQuery position/offset
-          return [$(target)[offsetMethod]().top + offsetBase, targetSelector];
+        if (target) {
+          var targetBCR = target.getBoundingClientRect();
+          if (targetBCR.width || targetBCR.height) {
+            // todo (fat): remove sketch reliance on jQuery position/offset
+            return [$(target)[offsetMethod]().top + offsetBase, targetSelector];
+          }
         }
         return null;
       }).filter(function (item) {
@@ -183,7 +183,7 @@ var ScrollSpy = function ($) {
     };
 
     ScrollSpy.prototype._getOffsetHeight = function _getOffsetHeight() {
-      return this._scrollElement === window ? window.innerHeight : this._scrollElement.offsetHeight;
+      return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;
     };
 
     ScrollSpy.prototype._process = function _process() {
@@ -235,9 +235,11 @@ var ScrollSpy = function ($) {
         $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);
+        // Set triggered link as active
+        $link.addClass(ClassName.ACTIVE);
+        // Set triggered links parents as active
+        // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor
+        $link.parents(Selector.NAV_LIST_GROUP).prev(Selector.NAV_LINKS + ', ' + Selector.LIST_ITEMS).addClass(ClassName.ACTIVE);
       }
 
       $(this._scrollElement).trigger(Event.ACTIVATE, {
@@ -315,3 +317,4 @@ var ScrollSpy = function ($) {
 
   return ScrollSpy;
 }(jQuery);
+//# sourceMappingURL=scrollspy.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/tab.js b/assets/javascripts/bootstrap/tab.js
index ba1b9c1..fb0749e 100644
--- a/assets/javascripts/bootstrap/tab.js
+++ b/assets/javascripts/bootstrap/tab.js
@@ -42,14 +42,10 @@ var Tab = function ($) {
   };
 
   var Selector = {
-    A: 'a',
-    LI: 'li',
     DROPDOWN: '.dropdown',
-    LIST: 'ul:not(.dropdown-menu), ol:not(.dropdown-menu), nav:not(.dropdown-menu)',
-    FADE_CHILD: '> .nav-item .fade, > .fade',
+    NAV_LIST_GROUP: '.nav, .list-group',
     ACTIVE: '.active',
-    ACTIVE_CHILD: '> .nav-item > .active, > .active',
-    DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"]',
+    DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"], [data-toggle="list"]',
     DROPDOWN_TOGGLE: '.dropdown-toggle',
     DROPDOWN_ACTIVE_CHILD: '> .dropdown-menu .active'
   };
@@ -80,7 +76,7 @@ var Tab = function ($) {
 
       var target = void 0;
       var previous = void 0;
-      var listElement = $(this._element).closest(Selector.LIST)[0];
+      var listElement = $(this._element).closest(Selector.NAV_LIST_GROUP)[0];
       var selector = Util.getSelectorFromElement(this._element);
 
       if (listElement) {
@@ -133,7 +129,7 @@ var Tab = function ($) {
     };
 
     Tab.prototype.dispose = function dispose() {
-      $.removeClass(this._element, DATA_KEY);
+      $.removeData(this._element, DATA_KEY);
       this._element = null;
     };
 
@@ -142,8 +138,8 @@ var Tab = function ($) {
     Tab.prototype._activate = function _activate(element, container, callback) {
       var _this2 = this;
 
-      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 active = $(container).find(Selector.ACTIVE)[0];
+      var isTransitioning = callback && Util.supportsTransitionEnd() && active && $(active).hasClass(ClassName.FADE);
 
       var complete = function complete() {
         return _this2._transitionComplete(element, active, isTransitioning, callback);
@@ -255,3 +251,4 @@ var Tab = function ($) {
 
   return Tab;
 }(jQuery);
+//# sourceMappingURL=tab.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/tooltip.js b/assets/javascripts/bootstrap/tooltip.js
index d261eab..f470481 100644
--- a/assets/javascripts/bootstrap/tooltip.js
+++ b/assets/javascripts/bootstrap/tooltip.js
@@ -14,11 +14,11 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
 var Tooltip = function ($) {
 
   /**
-   * Check for Tether dependency
-   * Tether - http://tether.io/
+   * Check for Popper dependency
+   * Popper - https://popper.js.org
    */
-  if (typeof Tether === 'undefined') {
-    throw new Error('Bootstrap tooltips require Tether (http://tether.io/)');
+  if (typeof Popper === 'undefined') {
+    throw new Error('Bootstrap tooltips require Popper.js (https://popper.js.org)');
   }
 
   /**
@@ -33,21 +33,8 @@ var Tooltip = function ($) {
   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-inner"></div></div>',
-    trigger: 'hover focus',
-    title: '',
-    delay: 0,
-    html: false,
-    selector: false,
-    placement: 'top',
-    offset: '0 0',
-    constraints: [],
-    container: false
-  };
+  var CLASS_PREFIX = 'bs-tooltip';
+  var BSCLS_PREFIX_REGEX = new RegExp('(^|\\s)' + CLASS_PREFIX + '\\S+', 'g');
 
   var DefaultType = {
     animation: 'boolean',
@@ -58,16 +45,31 @@ var Tooltip = function ($) {
     html: 'boolean',
     selector: '(string|boolean)',
     placement: '(string|function)',
-    offset: 'string',
-    constraints: 'array',
-    container: '(string|element|boolean)'
+    offset: '(number|string)',
+    container: '(string|element|boolean)',
+    fallbackPlacement: '(string|array)'
   };
 
   var AttachmentMap = {
-    TOP: 'bottom center',
-    RIGHT: 'middle left',
-    BOTTOM: 'top center',
-    LEFT: 'middle right'
+    AUTO: 'auto',
+    TOP: 'top',
+    RIGHT: 'right',
+    BOTTOM: 'bottom',
+    LEFT: 'left'
+  };
+
+  var Default = {
+    animation: true,
+    template: '<div class="tooltip" role="tooltip">' + '<div class="arrow" x-arrow></div>' + '<div class="tooltip-inner"></div></div>',
+    trigger: 'hover focus',
+    title: '',
+    delay: 0,
+    html: false,
+    selector: false,
+    placement: 'top',
+    offset: 0,
+    container: false,
+    fallbackPlacement: 'flip'
   };
 
   var HoverState = {
@@ -98,11 +100,6 @@ var Tooltip = function ($) {
     TOOLTIP_INNER: '.tooltip-inner'
   };
 
-  var TetherClass = {
-    element: false,
-    enabled: false
-  };
-
   var Trigger = {
     HOVER: 'hover',
     FOCUS: 'focus',
@@ -125,8 +122,7 @@ var Tooltip = function ($) {
       this._timeout = 0;
       this._hoverState = '';
       this._activeTrigger = {};
-      this._isTransitioning = false;
-      this._tether = null;
+      this._popper = null;
 
       // protected
       this.element = element;
@@ -183,8 +179,6 @@ var Tooltip = function ($) {
     Tooltip.prototype.dispose = function dispose() {
       clearTimeout(this._timeout);
 
-      this.cleanupTether();
-
       $.removeData(this.element, this.constructor.DATA_KEY);
 
       $(this.element).off(this.constructor.EVENT_KEY);
@@ -198,7 +192,10 @@ var Tooltip = function ($) {
       this._timeout = null;
       this._hoverState = null;
       this._activeTrigger = null;
-      this._tether = null;
+      if (this._popper !== null) {
+        this._popper.destroy();
+      }
+      this._popper = null;
 
       this.element = null;
       this.config = null;
@@ -214,9 +211,6 @@ var Tooltip = function ($) {
 
       var showEvent = $.Event(this.constructor.Event.SHOW);
       if (this.isWithContent() && this._isEnabled) {
-        if (this._isTransitioning) {
-          throw new Error('Tooltip is transitioning');
-        }
         $(this.element).trigger(showEvent);
 
         var isInTheDom = $.contains(this.element.ownerDocument.documentElement, this.element);
@@ -240,33 +234,54 @@ var Tooltip = function ($) {
         var placement = typeof this.config.placement === 'function' ? this.config.placement.call(this, tip, this.element) : this.config.placement;
 
         var attachment = this._getAttachment(placement);
+        this.addAttachmentClass(attachment);
 
         var container = this.config.container === false ? document.body : $(this.config.container);
 
-        $(tip).data(this.constructor.DATA_KEY, this).appendTo(container);
+        $(tip).data(this.constructor.DATA_KEY, this);
+
+        if (!$.contains(this.element.ownerDocument.documentElement, this.tip)) {
+          $(tip).appendTo(container);
+        }
 
         $(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,
-          addTargetClasses: false
+        this._popper = new Popper(this.element, tip, {
+          placement: attachment,
+          modifiers: {
+            offset: {
+              offset: this.config.offset
+            },
+            flip: {
+              behavior: this.config.fallbackPlacement
+            }
+          },
+          onCreate: function onCreate(data) {
+            if (data.originalPlacement !== data.placement) {
+              _this._handlePopperPlacementChange(data);
+            }
+          },
+          onUpdate: function onUpdate(data) {
+            _this._handlePopperPlacementChange(data);
+          }
         });
 
-        Util.reflow(tip);
-        this._tether.position();
-
         $(tip).addClass(ClassName.SHOW);
 
+        // if this is a touch-enabled device we add extra
+        // empty mouseover listeners to the body's immediate children;
+        // only needed because of broken event delegation on iOS
+        // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
+        if ('ontouchstart' in document.documentElement) {
+          $('body').children().on('mouseover', null, $.noop);
+        }
+
         var complete = function complete() {
+          if (_this.config.animation) {
+            _this._fixTransition();
+          }
           var prevHoverState = _this._hoverState;
           _this._hoverState = null;
-          _this._isTransitioning = false;
 
           $(_this.element).trigger(_this.constructor.Event.SHOWN);
 
@@ -276,12 +291,10 @@ var Tooltip = function ($) {
         };
 
         if (Util.supportsTransitionEnd() && $(this.tip).hasClass(ClassName.FADE)) {
-          this._isTransitioning = true;
           $(this.tip).one(Util.TRANSITION_END, complete).emulateTransitionEnd(Tooltip._TRANSITION_DURATION);
-          return;
+        } else {
+          complete();
         }
-
-        complete();
       }
     };
 
@@ -290,18 +303,17 @@ var Tooltip = function ($) {
 
       var tip = this.getTipElement();
       var hideEvent = $.Event(this.constructor.Event.HIDE);
-      if (this._isTransitioning) {
-        throw new Error('Tooltip is transitioning');
-      }
       var complete = function complete() {
         if (_this2._hoverState !== HoverState.SHOW && tip.parentNode) {
           tip.parentNode.removeChild(tip);
         }
 
+        _this2._cleanTipClass();
         _this2.element.removeAttribute('aria-describedby');
         $(_this2.element).trigger(_this2.constructor.Event.HIDDEN);
-        _this2._isTransitioning = false;
-        _this2.cleanupTether();
+        if (_this2._popper !== null) {
+          _this2._popper.destroy();
+        }
 
         if (callback) {
           callback();
@@ -316,12 +328,18 @@ var Tooltip = function ($) {
 
       $(tip).removeClass(ClassName.SHOW);
 
+      // if this is a touch-enabled device we remove the extra
+      // empty mouseover listeners we added for iOS support
+      if ('ontouchstart' in document.documentElement) {
+        $('body').children().off('mouseover', null, $.noop);
+      }
+
       this._activeTrigger[Trigger.CLICK] = false;
       this._activeTrigger[Trigger.FOCUS] = false;
       this._activeTrigger[Trigger.HOVER] = false;
 
       if (Util.supportsTransitionEnd() && $(this.tip).hasClass(ClassName.FADE)) {
-        this._isTransitioning = true;
+
         $(tip).one(Util.TRANSITION_END, complete).emulateTransitionEnd(TRANSITION_DURATION);
       } else {
         complete();
@@ -330,24 +348,30 @@ var Tooltip = function ($) {
       this._hoverState = '';
     };
 
+    Tooltip.prototype.update = function update() {
+      if (this._popper !== null) {
+        this._popper.scheduleUpdate();
+      }
+    };
+
     // protected
 
     Tooltip.prototype.isWithContent = function isWithContent() {
       return Boolean(this.getTitle());
     };
 
+    Tooltip.prototype.addAttachmentClass = function addAttachmentClass(attachment) {
+      $(this.getTipElement()).addClass(CLASS_PREFIX + '-' + attachment);
+    };
+
     Tooltip.prototype.getTipElement = function getTipElement() {
       return this.tip = this.tip || $(this.config.template)[0];
     };
 
     Tooltip.prototype.setContent = function setContent() {
       var $tip = $(this.getTipElement());
-
       this.setElementContent($tip.find(Selector.TOOLTIP_INNER), this.getTitle());
-
       $tip.removeClass(ClassName.FADE + ' ' + ClassName.SHOW);
-
-      this.cleanupTether();
     };
 
     Tooltip.prototype.setElementContent = function setElementContent($element, content) {
@@ -376,12 +400,6 @@ var Tooltip = function ($) {
       return title;
     };
 
-    Tooltip.prototype.cleanupTether = function cleanupTether() {
-      if (this._tether) {
-        this._tether.destroy();
-      }
-    };
-
     // private
 
     Tooltip.prototype._getAttachment = function _getAttachment(placement) {
@@ -521,6 +539,14 @@ var Tooltip = function ($) {
         };
       }
 
+      if (config.title && typeof config.title === 'number') {
+        config.title = config.title.toString();
+      }
+
+      if (config.content && typeof config.content === 'number') {
+        config.content = config.content.toString();
+      }
+
       Util.typeCheckConfig(NAME, config, this.constructor.DefaultType);
 
       return config;
@@ -540,6 +566,32 @@ var Tooltip = function ($) {
       return config;
     };
 
+    Tooltip.prototype._cleanTipClass = function _cleanTipClass() {
+      var $tip = $(this.getTipElement());
+      var tabClass = $tip.attr('class').match(BSCLS_PREFIX_REGEX);
+      if (tabClass !== null && tabClass.length > 0) {
+        $tip.removeClass(tabClass.join(''));
+      }
+    };
+
+    Tooltip.prototype._handlePopperPlacementChange = function _handlePopperPlacementChange(data) {
+      this._cleanTipClass();
+      this.addAttachmentClass(this._getAttachment(data.placement));
+    };
+
+    Tooltip.prototype._fixTransition = function _fixTransition() {
+      var tip = this.getTipElement();
+      var initConfigAnimation = this.config.animation;
+      if (tip.getAttribute('x-placement') !== null) {
+        return;
+      }
+      $(tip).removeClass(ClassName.FADE);
+      this.config.animation = false;
+      this.hide();
+      this.show();
+      this.config.animation = initConfigAnimation;
+    };
+
     // static
 
     Tooltip._jQueryInterface = function _jQueryInterface(config) {
@@ -619,4 +671,5 @@ var Tooltip = function ($) {
   };
 
   return Tooltip;
-}(jQuery); /* global Tether */
+}(jQuery); /* global Popper */
+//# sourceMappingURL=tooltip.js.map
\ No newline at end of file
diff --git a/assets/javascripts/bootstrap/util.js b/assets/javascripts/bootstrap/util.js
index 890b05d..58d5dd9 100644
--- a/assets/javascripts/bootstrap/util.js
+++ b/assets/javascripts/bootstrap/util.js
@@ -111,13 +111,16 @@ var Util = function ($) {
     },
     getSelectorFromElement: function getSelectorFromElement(element) {
       var selector = element.getAttribute('data-target');
-
-      if (!selector) {
+      if (!selector || selector === '#') {
         selector = element.getAttribute('href') || '';
-        selector = /^#[a-z]/i.test(selector) ? selector : null;
       }
 
-      return selector;
+      try {
+        var $selector = $(selector);
+        return $selector.length > 0 ? selector : null;
+      } catch (error) {
+        return null;
+      }
     },
     reflow: function reflow(element) {
       return element.offsetHeight;
@@ -147,3 +150,4 @@ var Util = function ($) {
 
   return Util;
 }(jQuery);
+//# sourceMappingURL=util.js.map
\ No newline at end of file