Update to Bootstrap 4.3.1

js/theme.js

@@ -1,13 +1,13 @@
 /*!
-  * Bootstrap v4.2.1 (https://getbootstrap.com/)
+  * Bootstrap v4.3.1 (https://getbootstrap.com/)
-  * Copyright 2011-2018 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
+  * Copyright 2011-2019 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   */
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('jquery')) :
   typeof define === 'function' && define.amd ? define(['exports', 'jquery'], factory) :
-  (factory((global.bootstrap = {}),global.jQuery));
+  (global = global || self, factory(global.bootstrap = {}, global.jQuery));
-}(this, (function (exports,$) { 'use strict';
+}(this, function (exports, $) { 'use strict';
 
   $ = $ && $.hasOwnProperty('default') ? $['default'] : $;
 
@@ -69,7 +69,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): util.js
+   * Bootstrap (v4.3.1): util.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -145,7 +145,11 @@
         selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : '';
       }
 
-      return selector && document.querySelector(selector) ? selector : null;
+      try {
+        return document.querySelector(selector) ? selector : null;
+      } catch (err) {
+        return null;
+      }
     },
     getTransitionDurationFromElement: function getTransitionDurationFromElement(element) {
       if (!element) {
@@ -225,7 +229,7 @@
    */
 
   var NAME = 'alert';
-  var VERSION = '4.2.1';
+  var VERSION = '4.3.1';
   var DATA_KEY = 'bs.alert';
   var EVENT_KEY = "." + DATA_KEY;
   var DATA_API_KEY = '.data-api';
@@ -280,8 +284,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getRootElement = function _getRootElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -323,8 +327,8 @@
 
     _proto._destroyElement = function _destroyElement(element) {
       $(element).detach().trigger(Event.CLOSED).remove();
-    }; // Static
+    } // Static
-
+    ;
 
     Alert._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -390,7 +394,7 @@
    */
 
   var NAME$1 = 'button';
-  var VERSION$1 = '4.2.1';
+  var VERSION$1 = '4.3.1';
   var DATA_KEY$1 = 'bs.button';
   var EVENT_KEY$1 = "." + DATA_KEY$1;
   var DATA_API_KEY$1 = '.data-api';
@@ -476,8 +480,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$1);
       this._element = null;
-    }; // Static
+    } // Static
-
+    ;
 
     Button._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -544,7 +548,7 @@
    */
 
   var NAME$2 = 'carousel';
-  var VERSION$2 = '4.2.1';
+  var VERSION$2 = '4.3.1';
   var DATA_KEY$2 = 'bs.carousel';
   var EVENT_KEY$2 = "." + DATA_KEY$2;
   var DATA_API_KEY$2 = '.data-api';
@@ -739,8 +743,8 @@
       this._isSliding = null;
       this._activeElement = null;
       this._indicatorsElement = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default, config);
@@ -784,7 +788,9 @@
         });
       }
 
-      this._addTouchEventListeners();
+      if (this._config.touch) {
+        this._addTouchEventListeners();
+      }
     };
 
     _proto._addTouchEventListeners = function _addTouchEventListeners() {
@@ -1025,8 +1031,8 @@
       if (isCycling) {
         this.cycle();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Carousel._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -1053,7 +1059,7 @@
           }
 
           data[action]();
-        } else if (_config.interval) {
+        } else if (_config.interval && _config.ride) {
           data.pause();
           data.cycle();
         }
@@ -1142,7 +1148,7 @@
    */
 
   var NAME$3 = 'collapse';
-  var VERSION$3 = '4.2.1';
+  var VERSION$3 = '4.3.1';
   var DATA_KEY$3 = 'bs.collapse';
   var EVENT_KEY$3 = "." + DATA_KEY$3;
   var DATA_API_KEY$3 = '.data-api';
@@ -1364,8 +1370,8 @@
       this._element = null;
       this._triggerArray = null;
       this._isTransitioning = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$1, config);
@@ -1409,8 +1415,8 @@
       if (triggerArray.length) {
         $(triggerArray).toggleClass(ClassName$3.COLLAPSED, !isOpen).attr('aria-expanded', isOpen);
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Collapse._getTargetFromElement = function _getTargetFromElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -1497,7 +1503,7 @@
 
   /**!
    * @fileOverview Kickass library to create and place poppers near their reference elements.
-   * @version 1.14.6
+   * @version 1.14.7
    * @license
    * Copyright (c) 2016 Federico Zivolo and contributors
    *
@@ -2065,7 +2071,11 @@
     if (getStyleComputedProperty(element, 'position') === 'fixed') {
       return true;
     }
-    return isFixed(getParentNode(element));
+    var parentNode = getParentNode(element);
+    if (!parentNode) {
+      return false;
+    }
+    return isFixed(parentNode);
   }
 
   /**
@@ -2721,18 +2731,23 @@
     var _data$offsets = data.offsets,
         popper = _data$offsets.popper,
         reference = _data$offsets.reference;
+    var round = Math.round,
+        floor = Math.floor;
 
-
-    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
-    var isVariation = data.placement.indexOf('-') !== -1;
-    var sameWidthOddness = reference.width % 2 === popper.width % 2;
-    var bothOddWidth = reference.width % 2 === 1 && popper.width % 2 === 1;
     var noRound = function noRound(v) {
       return v;
     };
 
-    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthOddness ? Math.round : Math.floor;
+    var referenceWidth = round(reference.width);
-    var verticalToInteger = !shouldRound ? noRound : Math.round;
+    var popperWidth = round(popper.width);
+
+    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
+    var isVariation = data.placement.indexOf('-') !== -1;
+    var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
+    var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
+
+    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
+    var verticalToInteger = !shouldRound ? noRound : round;
 
     return {
       left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
@@ -4072,7 +4087,7 @@
    */
 
   var NAME$4 = 'dropdown';
-  var VERSION$4 = '4.2.1';
+  var VERSION$4 = '4.3.1';
   var DATA_KEY$4 = 'bs.dropdown';
   var EVENT_KEY$4 = "." + DATA_KEY$4;
   var DATA_API_KEY$4 = '.data-api';
@@ -4301,8 +4316,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._addEventListeners = function _addEventListeners() {
       var _this = this;
@@ -4358,24 +4373,28 @@
       return $(this._element).closest('.navbar').length > 0;
     };
 
-    _proto._getPopperConfig = function _getPopperConfig() {
+    _proto._getOffset = function _getOffset() {
       var _this2 = this;
 
-      var offsetConf = {};
+      var offset = {};
 
       if (typeof this._config.offset === 'function') {
-        offsetConf.fn = function (data) {
+        offset.fn = function (data) {
-          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets) || {});
+          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets, _this2._element) || {});
           return data;
         };
       } else {
-        offsetConf.offset = this._config.offset;
+        offset.offset = this._config.offset;
       }
 
+      return offset;
+    };
+
+    _proto._getPopperConfig = function _getPopperConfig() {
       var popperConfig = {
         placement: this._getPlacement(),
         modifiers: {
-          offset: offsetConf,
+          offset: this._getOffset(),
           flip: {
             enabled: this._config.flip
           },
@@ -4393,8 +4412,8 @@
       }
 
       return popperConfig;
-    }; // Static
+    } // Static
-
+    ;
 
     Dropdown._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -4478,8 +4497,8 @@
       }
 
       return parent || element.parentNode;
-    }; // eslint-disable-next-line complexity
+    } // eslint-disable-next-line complexity
-
+    ;
 
     Dropdown._dataApiKeydownHandler = function _dataApiKeydownHandler(event) {
       // If not input/textarea:
@@ -4594,7 +4613,7 @@
    */
 
   var NAME$5 = 'modal';
-  var VERSION$5 = '4.2.1';
+  var VERSION$5 = '4.3.1';
   var DATA_KEY$5 = 'bs.modal';
   var EVENT_KEY$5 = "." + DATA_KEY$5;
   var DATA_API_KEY$5 = '.data-api';
@@ -4627,6 +4646,7 @@
     CLICK_DATA_API: "click" + EVENT_KEY$5 + DATA_API_KEY$5
   };
   var ClassName$5 = {
+    SCROLLABLE: 'modal-dialog-scrollable',
     SCROLLBAR_MEASURER: 'modal-scrollbar-measure',
     BACKDROP: 'modal-backdrop',
     OPEN: 'modal-open',
@@ -4635,6 +4655,7 @@
   };
   var Selector$5 = {
     DIALOG: '.modal-dialog',
+    MODAL_BODY: '.modal-body',
     DATA_TOGGLE: '[data-toggle="modal"]',
     DATA_DISMISS: '[data-dismiss="modal"]',
     FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
@@ -4787,8 +4808,8 @@
 
     _proto.handleUpdate = function handleUpdate() {
       this._adjustDialog();
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$3, config);
@@ -4812,7 +4833,11 @@
 
       this._element.setAttribute('aria-modal', true);
 
-      this._element.scrollTop = 0;
+      if ($(this._dialog).hasClass(ClassName$5.SCROLLABLE)) {
+        this._dialog.querySelector(Selector$5.MODAL_BODY).scrollTop = 0;
+      } else {
+        this._element.scrollTop = 0;
+      }
 
       if (transition) {
         Util.reflow(this._element);
@@ -4982,11 +5007,11 @@
       } else if (callback) {
         callback();
       }
-    }; // ----------------------------------------------------------------------
+    } // ----------------------------------------------------------------------
     // the following methods are used to handle overflowing modals
     // todo (fat): these should probably be refactored out of modal.js
     // ----------------------------------------------------------------------
-
+    ;
 
     _proto._adjustDialog = function _adjustDialog() {
       var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;
@@ -5071,8 +5096,8 @@
       var scrollbarWidth = scrollDiv.getBoundingClientRect().width - scrollDiv.clientWidth;
       document.body.removeChild(scrollDiv);
       return scrollbarWidth;
-    }; // Static
+    } // Static
-
+    ;
 
     Modal._jQueryInterface = function _jQueryInterface(config, relatedTarget) {
       return this.each(function () {
@@ -5163,6 +5188,127 @@
     return Modal._jQueryInterface;
   };
 
+  /**
+   * --------------------------------------------------------------------------
+   * Bootstrap (v4.3.1): tools/sanitizer.js
+   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+   * --------------------------------------------------------------------------
+   */
+  var uriAttrs = ['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href'];
+  var ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i;
+  var DefaultWhitelist = {
+    // Global attributes allowed on any supplied element below.
+    '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
+    a: ['target', 'href', 'title', 'rel'],
+    area: [],
+    b: [],
+    br: [],
+    col: [],
+    code: [],
+    div: [],
+    em: [],
+    hr: [],
+    h1: [],
+    h2: [],
+    h3: [],
+    h4: [],
+    h5: [],
+    h6: [],
+    i: [],
+    img: ['src', 'alt', 'title', 'width', 'height'],
+    li: [],
+    ol: [],
+    p: [],
+    pre: [],
+    s: [],
+    small: [],
+    span: [],
+    sub: [],
+    sup: [],
+    strong: [],
+    u: [],
+    ul: []
+    /**
+     * A pattern that recognizes a commonly useful subset of URLs that are safe.
+     *
+     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+     */
+
+  };
+  var SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi;
+  /**
+   * A pattern that matches safe data URLs. Only matches image, video and audio types.
+   *
+   * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+   */
+
+  var DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i;
+
+  function allowedAttribute(attr, allowedAttributeList) {
+    var attrName = attr.nodeName.toLowerCase();
+
+    if (allowedAttributeList.indexOf(attrName) !== -1) {
+      if (uriAttrs.indexOf(attrName) !== -1) {
+        return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN));
+      }
+
+      return true;
+    }
+
+    var regExp = allowedAttributeList.filter(function (attrRegex) {
+      return attrRegex instanceof RegExp;
+    }); // Check if a regular expression validates the attribute.
+
+    for (var i = 0, l = regExp.length; i < l; i++) {
+      if (attrName.match(regExp[i])) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  function sanitizeHtml(unsafeHtml, whiteList, sanitizeFn) {
+    if (unsafeHtml.length === 0) {
+      return unsafeHtml;
+    }
+
+    if (sanitizeFn && typeof sanitizeFn === 'function') {
+      return sanitizeFn(unsafeHtml);
+    }
+
+    var domParser = new window.DOMParser();
+    var createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');
+    var whitelistKeys = Object.keys(whiteList);
+    var elements = [].slice.call(createdDocument.body.querySelectorAll('*'));
+
+    var _loop = function _loop(i, len) {
+      var el = elements[i];
+      var elName = el.nodeName.toLowerCase();
+
+      if (whitelistKeys.indexOf(el.nodeName.toLowerCase()) === -1) {
+        el.parentNode.removeChild(el);
+        return "continue";
+      }
+
+      var attributeList = [].slice.call(el.attributes);
+      var whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || []);
+      attributeList.forEach(function (attr) {
+        if (!allowedAttribute(attr, whitelistedAttributes)) {
+          el.removeAttribute(attr.nodeName);
+        }
+      });
+    };
+
+    for (var i = 0, len = elements.length; i < len; i++) {
+      var _ret = _loop(i, len);
+
+      if (_ret === "continue") continue;
+    }
+
+    return createdDocument.body.innerHTML;
+  }
+
   /**
    * ------------------------------------------------------------------------
    * Constants
@@ -5170,12 +5316,13 @@
    */
 
   var NAME$6 = 'tooltip';
-  var VERSION$6 = '4.2.1';
+  var VERSION$6 = '4.3.1';
   var DATA_KEY$6 = 'bs.tooltip';
   var EVENT_KEY$6 = "." + DATA_KEY$6;
   var JQUERY_NO_CONFLICT$6 = $.fn[NAME$6];
   var CLASS_PREFIX = 'bs-tooltip';
   var BSCLS_PREFIX_REGEX = new RegExp("(^|\\s)" + CLASS_PREFIX + "\\S+", 'g');
+  var DISALLOWED_ATTRIBUTES = ['sanitize', 'whiteList', 'sanitizeFn'];
   var DefaultType$4 = {
     animation: 'boolean',
     template: 'string',
@@ -5185,10 +5332,13 @@
     html: 'boolean',
     selector: '(string|boolean)',
     placement: '(string|function)',
-    offset: '(number|string)',
+    offset: '(number|string|function)',
     container: '(string|element|boolean)',
     fallbackPlacement: '(string|array)',
-    boundary: '(string|element)'
+    boundary: '(string|element)',
+    sanitize: 'boolean',
+    sanitizeFn: '(null|function)',
+    whiteList: 'object'
   };
   var AttachmentMap$1 = {
     AUTO: 'auto',
@@ -5209,7 +5359,10 @@
     offset: 0,
     container: false,
     fallbackPlacement: 'flip',
-    boundary: 'scrollParent'
+    boundary: 'scrollParent',
+    sanitize: true,
+    sanitizeFn: null,
+    whiteList: DefaultWhitelist
   };
   var HoverState = {
     SHOW: 'show',
@@ -5394,9 +5547,7 @@
         this._popper = new Popper(this.element, tip, {
           placement: attachment,
           modifiers: {
-            offset: {
+            offset: this._getOffset(),
-              offset: this.config.offset
-            },
             flip: {
               behavior: this.config.fallbackPlacement
             },
@@ -5505,8 +5656,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Protected
+    } // Protected
-
+    ;
 
     _proto.isWithContent = function isWithContent() {
       return Boolean(this.getTitle());
@@ -5528,19 +5679,27 @@
     };
 
     _proto.setElementContent = function setElementContent($element, content) {
-      var html = this.config.html;
-
       if (typeof content === 'object' && (content.nodeType || content.jquery)) {
         // Content is a DOM node or a jQuery
-        if (html) {
+        if (this.config.html) {
           if (!$(content).parent().is($element)) {
             $element.empty().append(content);
           }
         } else {
           $element.text($(content).text());
         }
+
+        return;
+      }
+
+      if (this.config.html) {
+        if (this.config.sanitize) {
+          content = sanitizeHtml(content, this.config.whiteList, this.config.sanitizeFn);
+        }
+
+        $element.html(content);
       } else {
-        $element[html ? 'html' : 'text'](content);
+        $element.text(content);
       }
     };
 
@@ -5552,8 +5711,25 @@
       }
 
       return title;
-    }; // Private
+    } // Private
+    ;
 
+    _proto._getOffset = function _getOffset() {
+      var _this3 = this;
+
+      var offset = {};
+
+      if (typeof this.config.offset === 'function') {
+        offset.fn = function (data) {
+          data.offsets = _objectSpread({}, data.offsets, _this3.config.offset(data.offsets, _this3.element) || {});
+          return data;
+        };
+      } else {
+        offset.offset = this.config.offset;
+      }
+
+      return offset;
+    };
 
     _proto._getContainer = function _getContainer() {
       if (this.config.container === false) {
@@ -5572,27 +5748,27 @@
     };
 
     _proto._setListeners = function _setListeners() {
-      var _this3 = this;
+      var _this4 = this;
 
       var triggers = this.config.trigger.split(' ');
       triggers.forEach(function (trigger) {
         if (trigger === 'click') {
-          $(_this3.element).on(_this3.constructor.Event.CLICK, _this3.config.selector, function (event) {
+          $(_this4.element).on(_this4.constructor.Event.CLICK, _this4.config.selector, function (event) {
-            return _this3.toggle(event);
+            return _this4.toggle(event);
           });
         } else if (trigger !== Trigger.MANUAL) {
-          var eventIn = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSEENTER : _this3.constructor.Event.FOCUSIN;
+          var eventIn = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSEENTER : _this4.constructor.Event.FOCUSIN;
-          var eventOut = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSELEAVE : _this3.constructor.Event.FOCUSOUT;
+          var eventOut = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSELEAVE : _this4.constructor.Event.FOCUSOUT;
-          $(_this3.element).on(eventIn, _this3.config.selector, function (event) {
+          $(_this4.element).on(eventIn, _this4.config.selector, function (event) {
-            return _this3._enter(event);
+            return _this4._enter(event);
-          }).on(eventOut, _this3.config.selector, function (event) {
+          }).on(eventOut, _this4.config.selector, function (event) {
-            return _this3._leave(event);
+            return _this4._leave(event);
           });
         }
       });
       $(this.element).closest('.modal').on('hide.bs.modal', function () {
-        if (_this3.element) {
+        if (_this4.element) {
-          _this3.hide();
+          _this4.hide();
         }
       });
 
@@ -5691,7 +5867,13 @@
     };
 
     _proto._getConfig = function _getConfig(config) {
-      config = _objectSpread({}, this.constructor.Default, $(this.element).data(), typeof config === 'object' && config ? config : {});
+      var dataAttributes = $(this.element).data();
+      Object.keys(dataAttributes).forEach(function (dataAttr) {
+        if (DISALLOWED_ATTRIBUTES.indexOf(dataAttr) !== -1) {
+          delete dataAttributes[dataAttr];
+        }
+      });
+      config = _objectSpread({}, this.constructor.Default, dataAttributes, typeof config === 'object' && config ? config : {});
 
       if (typeof config.delay === 'number') {
         config.delay = {
@@ -5709,6 +5891,11 @@
       }
 
       Util.typeCheckConfig(NAME$6, config, this.constructor.DefaultType);
+
+      if (config.sanitize) {
+        config.template = sanitizeHtml(config.template, config.whiteList, config.sanitizeFn);
+      }
+
       return config;
     };
 
@@ -5757,8 +5944,8 @@
       this.hide();
       this.show();
       this.config.animation = initConfigAnimation;
-    }; // Static
+    } // Static
-
+    ;
 
     Tooltip._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -5846,7 +6033,7 @@
    */
 
   var NAME$7 = 'popover';
-  var VERSION$7 = '4.2.1';
+  var VERSION$7 = '4.3.1';
   var DATA_KEY$7 = 'bs.popover';
   var EVENT_KEY$7 = "." + DATA_KEY$7;
   var JQUERY_NO_CONFLICT$7 = $.fn[NAME$7];
@@ -5929,8 +6116,8 @@
 
       this.setElementContent($tip.find(Selector$7.CONTENT), content);
       $tip.removeClass(ClassName$7.FADE + " " + ClassName$7.SHOW);
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getContent = function _getContent() {
       return this.element.getAttribute('data-content') || this.config.content;
@@ -5943,8 +6130,8 @@
       if (tabClass !== null && tabClass.length > 0) {
         $tip.removeClass(tabClass.join(''));
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Popover._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6033,7 +6220,7 @@
    */
 
   var NAME$8 = 'scrollspy';
-  var VERSION$8 = '4.2.1';
+  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';
@@ -6156,8 +6343,8 @@
       this._targets = null;
       this._activeTarget = null;
       this._scrollHeight = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$6, typeof config === 'object' && config ? config : {});
@@ -6264,8 +6451,8 @@
       }).forEach(function (node) {
         return node.classList.remove(ClassName$8.ACTIVE);
       });
-    }; // Static
+    } // Static
-
+    ;
 
     ScrollSpy._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6340,7 +6527,7 @@
    */
 
   var NAME$9 = 'tab';
-  var VERSION$9 = '4.2.1';
+  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';
@@ -6448,8 +6635,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$9);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._activate = function _activate(element, container, callback) {
       var _this2 = this;
@@ -6491,7 +6678,10 @@
       }
 
       Util.reflow(element);
-      $(element).addClass(ClassName$9.SHOW);
+
+      if (element.classList.contains(ClassName$9.FADE)) {
+        element.classList.add(ClassName$9.SHOW);
+      }
 
       if (element.parentNode && $(element.parentNode).hasClass(ClassName$9.DROPDOWN_MENU)) {
         var dropdownElement = $(element).closest(Selector$9.DROPDOWN)[0];
@@ -6507,8 +6697,8 @@
       if (callback) {
         callback();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Tab._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6572,7 +6762,7 @@
    */
 
   var NAME$a = 'toast';
-  var VERSION$a = '4.2.1';
+  var VERSION$a = '4.3.1';
   var DATA_KEY$a = 'bs.toast';
   var EVENT_KEY$a = "." + DATA_KEY$a;
   var JQUERY_NO_CONFLICT$a = $.fn[NAME$a];
@@ -6687,8 +6877,8 @@
       $.removeData(this._element, DATA_KEY$a);
       this._element = null;
       this._config = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$7, $(this._element).data(), typeof config === 'object' && config ? config : {});
@@ -6721,8 +6911,8 @@
       } else {
         complete();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Toast._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6756,6 +6946,11 @@
       get: function get() {
         return DefaultType$7;
       }
+    }, {
+      key: "Default",
+      get: function get() {
+        return Default$7;
+      }
     }]);
 
     return Toast;
@@ -6777,7 +6972,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): index.js
+   * Bootstrap (v4.3.1): index.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -6814,7 +7009,7 @@
 
   Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
 //# sourceMappingURL=bootstrap.bundle.js.map
 
 /**

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "understrap",
-  "version": "0.8.9",
+  "version": "0.9.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -729,6 +729,11 @@
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
     },
+    "bootstrap": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.3.1.tgz",
+      "integrity": "sha512-rXqOmH1VilAt2DyPzluTi2blhk17bO7ef+zLLPlWvG494pDxcM234pJ8wTc/6R40UWizAIIMgxjvxZg5kmsbag=="
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",

package.json

@@ -27,7 +27,7 @@
   },
   "homepage": "https://understrap.com",
   "dependencies": {
-    "bootstrap": "4.3.0",
+    "bootstrap": "4.3.1",
     "browser-sync": "^2.26.3",
     "del": "^3.0.0",
     "font-awesome": "^4.7.0",

src/js/bootstrap4/bootstrap.bundle.js

@@ -1,13 +1,13 @@
 /*!
-  * Bootstrap v4.2.1 (https://getbootstrap.com/)
+  * Bootstrap v4.3.1 (https://getbootstrap.com/)
-  * Copyright 2011-2018 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
+  * Copyright 2011-2019 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   */
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('jquery')) :
   typeof define === 'function' && define.amd ? define(['exports', 'jquery'], factory) :
-  (factory((global.bootstrap = {}),global.jQuery));
+  (global = global || self, factory(global.bootstrap = {}, global.jQuery));
-}(this, (function (exports,$) { 'use strict';
+}(this, function (exports, $) { 'use strict';
 
   $ = $ && $.hasOwnProperty('default') ? $['default'] : $;
 
@@ -69,7 +69,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): util.js
+   * Bootstrap (v4.3.1): util.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -145,7 +145,11 @@
         selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : '';
       }
 
-      return selector && document.querySelector(selector) ? selector : null;
+      try {
+        return document.querySelector(selector) ? selector : null;
+      } catch (err) {
+        return null;
+      }
     },
     getTransitionDurationFromElement: function getTransitionDurationFromElement(element) {
       if (!element) {
@@ -225,7 +229,7 @@
    */
 
   var NAME = 'alert';
-  var VERSION = '4.2.1';
+  var VERSION = '4.3.1';
   var DATA_KEY = 'bs.alert';
   var EVENT_KEY = "." + DATA_KEY;
   var DATA_API_KEY = '.data-api';
@@ -280,8 +284,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getRootElement = function _getRootElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -323,8 +327,8 @@
 
     _proto._destroyElement = function _destroyElement(element) {
       $(element).detach().trigger(Event.CLOSED).remove();
-    }; // Static
+    } // Static
-
+    ;
 
     Alert._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -390,7 +394,7 @@
    */
 
   var NAME$1 = 'button';
-  var VERSION$1 = '4.2.1';
+  var VERSION$1 = '4.3.1';
   var DATA_KEY$1 = 'bs.button';
   var EVENT_KEY$1 = "." + DATA_KEY$1;
   var DATA_API_KEY$1 = '.data-api';
@@ -476,8 +480,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$1);
       this._element = null;
-    }; // Static
+    } // Static
-
+    ;
 
     Button._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -544,7 +548,7 @@
    */
 
   var NAME$2 = 'carousel';
-  var VERSION$2 = '4.2.1';
+  var VERSION$2 = '4.3.1';
   var DATA_KEY$2 = 'bs.carousel';
   var EVENT_KEY$2 = "." + DATA_KEY$2;
   var DATA_API_KEY$2 = '.data-api';
@@ -739,8 +743,8 @@
       this._isSliding = null;
       this._activeElement = null;
       this._indicatorsElement = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default, config);
@@ -784,7 +788,9 @@
         });
       }
 
-      this._addTouchEventListeners();
+      if (this._config.touch) {
+        this._addTouchEventListeners();
+      }
     };
 
     _proto._addTouchEventListeners = function _addTouchEventListeners() {
@@ -1025,8 +1031,8 @@
       if (isCycling) {
         this.cycle();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Carousel._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -1053,7 +1059,7 @@
           }
 
           data[action]();
-        } else if (_config.interval) {
+        } else if (_config.interval && _config.ride) {
           data.pause();
           data.cycle();
         }
@@ -1142,7 +1148,7 @@
    */
 
   var NAME$3 = 'collapse';
-  var VERSION$3 = '4.2.1';
+  var VERSION$3 = '4.3.1';
   var DATA_KEY$3 = 'bs.collapse';
   var EVENT_KEY$3 = "." + DATA_KEY$3;
   var DATA_API_KEY$3 = '.data-api';
@@ -1364,8 +1370,8 @@
       this._element = null;
       this._triggerArray = null;
       this._isTransitioning = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$1, config);
@@ -1409,8 +1415,8 @@
       if (triggerArray.length) {
         $(triggerArray).toggleClass(ClassName$3.COLLAPSED, !isOpen).attr('aria-expanded', isOpen);
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Collapse._getTargetFromElement = function _getTargetFromElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -1497,7 +1503,7 @@
 
   /**!
    * @fileOverview Kickass library to create and place poppers near their reference elements.
-   * @version 1.14.6
+   * @version 1.14.7
    * @license
    * Copyright (c) 2016 Federico Zivolo and contributors
    *
@@ -2065,7 +2071,11 @@
     if (getStyleComputedProperty(element, 'position') === 'fixed') {
       return true;
     }
-    return isFixed(getParentNode(element));
+    var parentNode = getParentNode(element);
+    if (!parentNode) {
+      return false;
+    }
+    return isFixed(parentNode);
   }
 
   /**
@@ -2721,18 +2731,23 @@
     var _data$offsets = data.offsets,
         popper = _data$offsets.popper,
         reference = _data$offsets.reference;
+    var round = Math.round,
+        floor = Math.floor;
 
-
-    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
-    var isVariation = data.placement.indexOf('-') !== -1;
-    var sameWidthOddness = reference.width % 2 === popper.width % 2;
-    var bothOddWidth = reference.width % 2 === 1 && popper.width % 2 === 1;
     var noRound = function noRound(v) {
       return v;
     };
 
-    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthOddness ? Math.round : Math.floor;
+    var referenceWidth = round(reference.width);
-    var verticalToInteger = !shouldRound ? noRound : Math.round;
+    var popperWidth = round(popper.width);
+
+    var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
+    var isVariation = data.placement.indexOf('-') !== -1;
+    var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
+    var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
+
+    var horizontalToInteger = !shouldRound ? noRound : isVertical || isVariation || sameWidthParity ? round : floor;
+    var verticalToInteger = !shouldRound ? noRound : round;
 
     return {
       left: horizontalToInteger(bothOddWidth && !isVariation && shouldRound ? popper.left - 1 : popper.left),
@@ -4072,7 +4087,7 @@
    */
 
   var NAME$4 = 'dropdown';
-  var VERSION$4 = '4.2.1';
+  var VERSION$4 = '4.3.1';
   var DATA_KEY$4 = 'bs.dropdown';
   var EVENT_KEY$4 = "." + DATA_KEY$4;
   var DATA_API_KEY$4 = '.data-api';
@@ -4301,8 +4316,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._addEventListeners = function _addEventListeners() {
       var _this = this;
@@ -4358,24 +4373,28 @@
       return $(this._element).closest('.navbar').length > 0;
     };
 
-    _proto._getPopperConfig = function _getPopperConfig() {
+    _proto._getOffset = function _getOffset() {
       var _this2 = this;
 
-      var offsetConf = {};
+      var offset = {};
 
       if (typeof this._config.offset === 'function') {
-        offsetConf.fn = function (data) {
+        offset.fn = function (data) {
-          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets) || {});
+          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets, _this2._element) || {});
           return data;
         };
       } else {
-        offsetConf.offset = this._config.offset;
+        offset.offset = this._config.offset;
       }
 
+      return offset;
+    };
+
+    _proto._getPopperConfig = function _getPopperConfig() {
       var popperConfig = {
         placement: this._getPlacement(),
         modifiers: {
-          offset: offsetConf,
+          offset: this._getOffset(),
           flip: {
             enabled: this._config.flip
           },
@@ -4393,8 +4412,8 @@
       }
 
       return popperConfig;
-    }; // Static
+    } // Static
-
+    ;
 
     Dropdown._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -4478,8 +4497,8 @@
       }
 
       return parent || element.parentNode;
-    }; // eslint-disable-next-line complexity
+    } // eslint-disable-next-line complexity
-
+    ;
 
     Dropdown._dataApiKeydownHandler = function _dataApiKeydownHandler(event) {
       // If not input/textarea:
@@ -4594,7 +4613,7 @@
    */
 
   var NAME$5 = 'modal';
-  var VERSION$5 = '4.2.1';
+  var VERSION$5 = '4.3.1';
   var DATA_KEY$5 = 'bs.modal';
   var EVENT_KEY$5 = "." + DATA_KEY$5;
   var DATA_API_KEY$5 = '.data-api';
@@ -4627,6 +4646,7 @@
     CLICK_DATA_API: "click" + EVENT_KEY$5 + DATA_API_KEY$5
   };
   var ClassName$5 = {
+    SCROLLABLE: 'modal-dialog-scrollable',
     SCROLLBAR_MEASURER: 'modal-scrollbar-measure',
     BACKDROP: 'modal-backdrop',
     OPEN: 'modal-open',
@@ -4635,6 +4655,7 @@
   };
   var Selector$5 = {
     DIALOG: '.modal-dialog',
+    MODAL_BODY: '.modal-body',
     DATA_TOGGLE: '[data-toggle="modal"]',
     DATA_DISMISS: '[data-dismiss="modal"]',
     FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
@@ -4787,8 +4808,8 @@
 
     _proto.handleUpdate = function handleUpdate() {
       this._adjustDialog();
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$3, config);
@@ -4812,7 +4833,11 @@
 
       this._element.setAttribute('aria-modal', true);
 
-      this._element.scrollTop = 0;
+      if ($(this._dialog).hasClass(ClassName$5.SCROLLABLE)) {
+        this._dialog.querySelector(Selector$5.MODAL_BODY).scrollTop = 0;
+      } else {
+        this._element.scrollTop = 0;
+      }
 
       if (transition) {
         Util.reflow(this._element);
@@ -4982,11 +5007,11 @@
       } else if (callback) {
         callback();
       }
-    }; // ----------------------------------------------------------------------
+    } // ----------------------------------------------------------------------
     // the following methods are used to handle overflowing modals
     // todo (fat): these should probably be refactored out of modal.js
     // ----------------------------------------------------------------------
-
+    ;
 
     _proto._adjustDialog = function _adjustDialog() {
       var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;
@@ -5071,8 +5096,8 @@
       var scrollbarWidth = scrollDiv.getBoundingClientRect().width - scrollDiv.clientWidth;
       document.body.removeChild(scrollDiv);
       return scrollbarWidth;
-    }; // Static
+    } // Static
-
+    ;
 
     Modal._jQueryInterface = function _jQueryInterface(config, relatedTarget) {
       return this.each(function () {
@@ -5163,6 +5188,127 @@
     return Modal._jQueryInterface;
   };
 
+  /**
+   * --------------------------------------------------------------------------
+   * Bootstrap (v4.3.1): tools/sanitizer.js
+   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+   * --------------------------------------------------------------------------
+   */
+  var uriAttrs = ['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href'];
+  var ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i;
+  var DefaultWhitelist = {
+    // Global attributes allowed on any supplied element below.
+    '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
+    a: ['target', 'href', 'title', 'rel'],
+    area: [],
+    b: [],
+    br: [],
+    col: [],
+    code: [],
+    div: [],
+    em: [],
+    hr: [],
+    h1: [],
+    h2: [],
+    h3: [],
+    h4: [],
+    h5: [],
+    h6: [],
+    i: [],
+    img: ['src', 'alt', 'title', 'width', 'height'],
+    li: [],
+    ol: [],
+    p: [],
+    pre: [],
+    s: [],
+    small: [],
+    span: [],
+    sub: [],
+    sup: [],
+    strong: [],
+    u: [],
+    ul: []
+    /**
+     * A pattern that recognizes a commonly useful subset of URLs that are safe.
+     *
+     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+     */
+
+  };
+  var SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi;
+  /**
+   * A pattern that matches safe data URLs. Only matches image, video and audio types.
+   *
+   * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+   */
+
+  var DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i;
+
+  function allowedAttribute(attr, allowedAttributeList) {
+    var attrName = attr.nodeName.toLowerCase();
+
+    if (allowedAttributeList.indexOf(attrName) !== -1) {
+      if (uriAttrs.indexOf(attrName) !== -1) {
+        return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN));
+      }
+
+      return true;
+    }
+
+    var regExp = allowedAttributeList.filter(function (attrRegex) {
+      return attrRegex instanceof RegExp;
+    }); // Check if a regular expression validates the attribute.
+
+    for (var i = 0, l = regExp.length; i < l; i++) {
+      if (attrName.match(regExp[i])) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  function sanitizeHtml(unsafeHtml, whiteList, sanitizeFn) {
+    if (unsafeHtml.length === 0) {
+      return unsafeHtml;
+    }
+
+    if (sanitizeFn && typeof sanitizeFn === 'function') {
+      return sanitizeFn(unsafeHtml);
+    }
+
+    var domParser = new window.DOMParser();
+    var createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');
+    var whitelistKeys = Object.keys(whiteList);
+    var elements = [].slice.call(createdDocument.body.querySelectorAll('*'));
+
+    var _loop = function _loop(i, len) {
+      var el = elements[i];
+      var elName = el.nodeName.toLowerCase();
+
+      if (whitelistKeys.indexOf(el.nodeName.toLowerCase()) === -1) {
+        el.parentNode.removeChild(el);
+        return "continue";
+      }
+
+      var attributeList = [].slice.call(el.attributes);
+      var whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || []);
+      attributeList.forEach(function (attr) {
+        if (!allowedAttribute(attr, whitelistedAttributes)) {
+          el.removeAttribute(attr.nodeName);
+        }
+      });
+    };
+
+    for (var i = 0, len = elements.length; i < len; i++) {
+      var _ret = _loop(i, len);
+
+      if (_ret === "continue") continue;
+    }
+
+    return createdDocument.body.innerHTML;
+  }
+
   /**
    * ------------------------------------------------------------------------
    * Constants
@@ -5170,12 +5316,13 @@
    */
 
   var NAME$6 = 'tooltip';
-  var VERSION$6 = '4.2.1';
+  var VERSION$6 = '4.3.1';
   var DATA_KEY$6 = 'bs.tooltip';
   var EVENT_KEY$6 = "." + DATA_KEY$6;
   var JQUERY_NO_CONFLICT$6 = $.fn[NAME$6];
   var CLASS_PREFIX = 'bs-tooltip';
   var BSCLS_PREFIX_REGEX = new RegExp("(^|\\s)" + CLASS_PREFIX + "\\S+", 'g');
+  var DISALLOWED_ATTRIBUTES = ['sanitize', 'whiteList', 'sanitizeFn'];
   var DefaultType$4 = {
     animation: 'boolean',
     template: 'string',
@@ -5185,10 +5332,13 @@
     html: 'boolean',
     selector: '(string|boolean)',
     placement: '(string|function)',
-    offset: '(number|string)',
+    offset: '(number|string|function)',
     container: '(string|element|boolean)',
     fallbackPlacement: '(string|array)',
-    boundary: '(string|element)'
+    boundary: '(string|element)',
+    sanitize: 'boolean',
+    sanitizeFn: '(null|function)',
+    whiteList: 'object'
   };
   var AttachmentMap$1 = {
     AUTO: 'auto',
@@ -5209,7 +5359,10 @@
     offset: 0,
     container: false,
     fallbackPlacement: 'flip',
-    boundary: 'scrollParent'
+    boundary: 'scrollParent',
+    sanitize: true,
+    sanitizeFn: null,
+    whiteList: DefaultWhitelist
   };
   var HoverState = {
     SHOW: 'show',
@@ -5394,9 +5547,7 @@
         this._popper = new Popper(this.element, tip, {
           placement: attachment,
           modifiers: {
-            offset: {
+            offset: this._getOffset(),
-              offset: this.config.offset
-            },
             flip: {
               behavior: this.config.fallbackPlacement
             },
@@ -5505,8 +5656,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Protected
+    } // Protected
-
+    ;
 
     _proto.isWithContent = function isWithContent() {
       return Boolean(this.getTitle());
@@ -5528,19 +5679,27 @@
     };
 
     _proto.setElementContent = function setElementContent($element, content) {
-      var html = this.config.html;
-
       if (typeof content === 'object' && (content.nodeType || content.jquery)) {
         // Content is a DOM node or a jQuery
-        if (html) {
+        if (this.config.html) {
           if (!$(content).parent().is($element)) {
             $element.empty().append(content);
           }
         } else {
           $element.text($(content).text());
         }
+
+        return;
+      }
+
+      if (this.config.html) {
+        if (this.config.sanitize) {
+          content = sanitizeHtml(content, this.config.whiteList, this.config.sanitizeFn);
+        }
+
+        $element.html(content);
       } else {
-        $element[html ? 'html' : 'text'](content);
+        $element.text(content);
       }
     };
 
@@ -5552,8 +5711,25 @@
       }
 
       return title;
-    }; // Private
+    } // Private
+    ;
 
+    _proto._getOffset = function _getOffset() {
+      var _this3 = this;
+
+      var offset = {};
+
+      if (typeof this.config.offset === 'function') {
+        offset.fn = function (data) {
+          data.offsets = _objectSpread({}, data.offsets, _this3.config.offset(data.offsets, _this3.element) || {});
+          return data;
+        };
+      } else {
+        offset.offset = this.config.offset;
+      }
+
+      return offset;
+    };
 
     _proto._getContainer = function _getContainer() {
       if (this.config.container === false) {
@@ -5572,27 +5748,27 @@
     };
 
     _proto._setListeners = function _setListeners() {
-      var _this3 = this;
+      var _this4 = this;
 
       var triggers = this.config.trigger.split(' ');
       triggers.forEach(function (trigger) {
         if (trigger === 'click') {
-          $(_this3.element).on(_this3.constructor.Event.CLICK, _this3.config.selector, function (event) {
+          $(_this4.element).on(_this4.constructor.Event.CLICK, _this4.config.selector, function (event) {
-            return _this3.toggle(event);
+            return _this4.toggle(event);
           });
         } else if (trigger !== Trigger.MANUAL) {
-          var eventIn = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSEENTER : _this3.constructor.Event.FOCUSIN;
+          var eventIn = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSEENTER : _this4.constructor.Event.FOCUSIN;
-          var eventOut = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSELEAVE : _this3.constructor.Event.FOCUSOUT;
+          var eventOut = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSELEAVE : _this4.constructor.Event.FOCUSOUT;
-          $(_this3.element).on(eventIn, _this3.config.selector, function (event) {
+          $(_this4.element).on(eventIn, _this4.config.selector, function (event) {
-            return _this3._enter(event);
+            return _this4._enter(event);
-          }).on(eventOut, _this3.config.selector, function (event) {
+          }).on(eventOut, _this4.config.selector, function (event) {
-            return _this3._leave(event);
+            return _this4._leave(event);
           });
         }
       });
       $(this.element).closest('.modal').on('hide.bs.modal', function () {
-        if (_this3.element) {
+        if (_this4.element) {
-          _this3.hide();
+          _this4.hide();
         }
       });
 
@@ -5691,7 +5867,13 @@
     };
 
     _proto._getConfig = function _getConfig(config) {
-      config = _objectSpread({}, this.constructor.Default, $(this.element).data(), typeof config === 'object' && config ? config : {});
+      var dataAttributes = $(this.element).data();
+      Object.keys(dataAttributes).forEach(function (dataAttr) {
+        if (DISALLOWED_ATTRIBUTES.indexOf(dataAttr) !== -1) {
+          delete dataAttributes[dataAttr];
+        }
+      });
+      config = _objectSpread({}, this.constructor.Default, dataAttributes, typeof config === 'object' && config ? config : {});
 
       if (typeof config.delay === 'number') {
         config.delay = {
@@ -5709,6 +5891,11 @@
       }
 
       Util.typeCheckConfig(NAME$6, config, this.constructor.DefaultType);
+
+      if (config.sanitize) {
+        config.template = sanitizeHtml(config.template, config.whiteList, config.sanitizeFn);
+      }
+
       return config;
     };
 
@@ -5757,8 +5944,8 @@
       this.hide();
       this.show();
       this.config.animation = initConfigAnimation;
-    }; // Static
+    } // Static
-
+    ;
 
     Tooltip._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -5846,7 +6033,7 @@
    */
 
   var NAME$7 = 'popover';
-  var VERSION$7 = '4.2.1';
+  var VERSION$7 = '4.3.1';
   var DATA_KEY$7 = 'bs.popover';
   var EVENT_KEY$7 = "." + DATA_KEY$7;
   var JQUERY_NO_CONFLICT$7 = $.fn[NAME$7];
@@ -5929,8 +6116,8 @@
 
       this.setElementContent($tip.find(Selector$7.CONTENT), content);
       $tip.removeClass(ClassName$7.FADE + " " + ClassName$7.SHOW);
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getContent = function _getContent() {
       return this.element.getAttribute('data-content') || this.config.content;
@@ -5943,8 +6130,8 @@
       if (tabClass !== null && tabClass.length > 0) {
         $tip.removeClass(tabClass.join(''));
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Popover._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6033,7 +6220,7 @@
    */
 
   var NAME$8 = 'scrollspy';
-  var VERSION$8 = '4.2.1';
+  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';
@@ -6156,8 +6343,8 @@
       this._targets = null;
       this._activeTarget = null;
       this._scrollHeight = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$6, typeof config === 'object' && config ? config : {});
@@ -6264,8 +6451,8 @@
       }).forEach(function (node) {
         return node.classList.remove(ClassName$8.ACTIVE);
       });
-    }; // Static
+    } // Static
-
+    ;
 
     ScrollSpy._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6340,7 +6527,7 @@
    */
 
   var NAME$9 = 'tab';
-  var VERSION$9 = '4.2.1';
+  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';
@@ -6448,8 +6635,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$9);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._activate = function _activate(element, container, callback) {
       var _this2 = this;
@@ -6491,7 +6678,10 @@
       }
 
       Util.reflow(element);
-      $(element).addClass(ClassName$9.SHOW);
+
+      if (element.classList.contains(ClassName$9.FADE)) {
+        element.classList.add(ClassName$9.SHOW);
+      }
 
       if (element.parentNode && $(element.parentNode).hasClass(ClassName$9.DROPDOWN_MENU)) {
         var dropdownElement = $(element).closest(Selector$9.DROPDOWN)[0];
@@ -6507,8 +6697,8 @@
       if (callback) {
         callback();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Tab._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6572,7 +6762,7 @@
    */
 
   var NAME$a = 'toast';
-  var VERSION$a = '4.2.1';
+  var VERSION$a = '4.3.1';
   var DATA_KEY$a = 'bs.toast';
   var EVENT_KEY$a = "." + DATA_KEY$a;
   var JQUERY_NO_CONFLICT$a = $.fn[NAME$a];
@@ -6687,8 +6877,8 @@
       $.removeData(this._element, DATA_KEY$a);
       this._element = null;
       this._config = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$7, $(this._element).data(), typeof config === 'object' && config ? config : {});
@@ -6721,8 +6911,8 @@
       } else {
         complete();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Toast._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -6756,6 +6946,11 @@
       get: function get() {
         return DefaultType$7;
       }
+    }, {
+      key: "Default",
+      get: function get() {
+        return Default$7;
+      }
     }]);
 
     return Toast;
@@ -6777,7 +6972,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): index.js
+   * Bootstrap (v4.3.1): index.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -6814,5 +7009,5 @@
 
   Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
 //# sourceMappingURL=bootstrap.bundle.js.map

src/js/bootstrap4/bootstrap.js

@@ -1,16 +1,16 @@
 /*!
-  * Bootstrap v4.2.1 (https://getbootstrap.com/)
+  * Bootstrap v4.3.1 (https://getbootstrap.com/)
-  * Copyright 2011-2018 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
+  * Copyright 2011-2019 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
   */
 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('popper.js'), require('jquery')) :
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('jquery'), require('popper.js')) :
-  typeof define === 'function' && define.amd ? define(['exports', 'popper.js', 'jquery'], factory) :
+  typeof define === 'function' && define.amd ? define(['exports', 'jquery', 'popper.js'], factory) :
-  (factory((global.bootstrap = {}),global.Popper,global.jQuery));
+  (global = global || self, factory(global.bootstrap = {}, global.jQuery, global.Popper));
-}(this, (function (exports,Popper,$) { 'use strict';
+}(this, function (exports, $, Popper) { 'use strict';
 
-  Popper = Popper && Popper.hasOwnProperty('default') ? Popper['default'] : Popper;
   $ = $ && $.hasOwnProperty('default') ? $['default'] : $;
+  Popper = Popper && Popper.hasOwnProperty('default') ? Popper['default'] : Popper;
 
   function _defineProperties(target, props) {
     for (var i = 0; i < props.length; i++) {
@@ -70,7 +70,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): util.js
+   * Bootstrap (v4.3.1): util.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -146,7 +146,11 @@
         selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : '';
       }
 
-      return selector && document.querySelector(selector) ? selector : null;
+      try {
+        return document.querySelector(selector) ? selector : null;
+      } catch (err) {
+        return null;
+      }
     },
     getTransitionDurationFromElement: function getTransitionDurationFromElement(element) {
       if (!element) {
@@ -226,7 +230,7 @@
    */
 
   var NAME = 'alert';
-  var VERSION = '4.2.1';
+  var VERSION = '4.3.1';
   var DATA_KEY = 'bs.alert';
   var EVENT_KEY = "." + DATA_KEY;
   var DATA_API_KEY = '.data-api';
@@ -281,8 +285,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getRootElement = function _getRootElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -324,8 +328,8 @@
 
     _proto._destroyElement = function _destroyElement(element) {
       $(element).detach().trigger(Event.CLOSED).remove();
-    }; // Static
+    } // Static
-
+    ;
 
     Alert._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -391,7 +395,7 @@
    */
 
   var NAME$1 = 'button';
-  var VERSION$1 = '4.2.1';
+  var VERSION$1 = '4.3.1';
   var DATA_KEY$1 = 'bs.button';
   var EVENT_KEY$1 = "." + DATA_KEY$1;
   var DATA_API_KEY$1 = '.data-api';
@@ -477,8 +481,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$1);
       this._element = null;
-    }; // Static
+    } // Static
-
+    ;
 
     Button._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -545,7 +549,7 @@
    */
 
   var NAME$2 = 'carousel';
-  var VERSION$2 = '4.2.1';
+  var VERSION$2 = '4.3.1';
   var DATA_KEY$2 = 'bs.carousel';
   var EVENT_KEY$2 = "." + DATA_KEY$2;
   var DATA_API_KEY$2 = '.data-api';
@@ -740,8 +744,8 @@
       this._isSliding = null;
       this._activeElement = null;
       this._indicatorsElement = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default, config);
@@ -785,7 +789,9 @@
         });
       }
 
-      this._addTouchEventListeners();
+      if (this._config.touch) {
+        this._addTouchEventListeners();
+      }
     };
 
     _proto._addTouchEventListeners = function _addTouchEventListeners() {
@@ -1026,8 +1032,8 @@
       if (isCycling) {
         this.cycle();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Carousel._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -1054,7 +1060,7 @@
           }
 
           data[action]();
-        } else if (_config.interval) {
+        } else if (_config.interval && _config.ride) {
           data.pause();
           data.cycle();
         }
@@ -1143,7 +1149,7 @@
    */
 
   var NAME$3 = 'collapse';
-  var VERSION$3 = '4.2.1';
+  var VERSION$3 = '4.3.1';
   var DATA_KEY$3 = 'bs.collapse';
   var EVENT_KEY$3 = "." + DATA_KEY$3;
   var DATA_API_KEY$3 = '.data-api';
@@ -1365,8 +1371,8 @@
       this._element = null;
       this._triggerArray = null;
       this._isTransitioning = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$1, config);
@@ -1410,8 +1416,8 @@
       if (triggerArray.length) {
         $(triggerArray).toggleClass(ClassName$3.COLLAPSED, !isOpen).attr('aria-expanded', isOpen);
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Collapse._getTargetFromElement = function _getTargetFromElement(element) {
       var selector = Util.getSelectorFromElement(element);
@@ -1503,7 +1509,7 @@
    */
 
   var NAME$4 = 'dropdown';
-  var VERSION$4 = '4.2.1';
+  var VERSION$4 = '4.3.1';
   var DATA_KEY$4 = 'bs.dropdown';
   var EVENT_KEY$4 = "." + DATA_KEY$4;
   var DATA_API_KEY$4 = '.data-api';
@@ -1732,8 +1738,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._addEventListeners = function _addEventListeners() {
       var _this = this;
@@ -1789,24 +1795,28 @@
       return $(this._element).closest('.navbar').length > 0;
     };
 
-    _proto._getPopperConfig = function _getPopperConfig() {
+    _proto._getOffset = function _getOffset() {
       var _this2 = this;
 
-      var offsetConf = {};
+      var offset = {};
 
       if (typeof this._config.offset === 'function') {
-        offsetConf.fn = function (data) {
+        offset.fn = function (data) {
-          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets) || {});
+          data.offsets = _objectSpread({}, data.offsets, _this2._config.offset(data.offsets, _this2._element) || {});
           return data;
         };
       } else {
-        offsetConf.offset = this._config.offset;
+        offset.offset = this._config.offset;
       }
 
+      return offset;
+    };
+
+    _proto._getPopperConfig = function _getPopperConfig() {
       var popperConfig = {
         placement: this._getPlacement(),
         modifiers: {
-          offset: offsetConf,
+          offset: this._getOffset(),
           flip: {
             enabled: this._config.flip
           },
@@ -1824,8 +1834,8 @@
       }
 
       return popperConfig;
-    }; // Static
+    } // Static
-
+    ;
 
     Dropdown._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -1909,8 +1919,8 @@
       }
 
       return parent || element.parentNode;
-    }; // eslint-disable-next-line complexity
+    } // eslint-disable-next-line complexity
-
+    ;
 
     Dropdown._dataApiKeydownHandler = function _dataApiKeydownHandler(event) {
       // If not input/textarea:
@@ -2025,7 +2035,7 @@
    */
 
   var NAME$5 = 'modal';
-  var VERSION$5 = '4.2.1';
+  var VERSION$5 = '4.3.1';
   var DATA_KEY$5 = 'bs.modal';
   var EVENT_KEY$5 = "." + DATA_KEY$5;
   var DATA_API_KEY$5 = '.data-api';
@@ -2058,6 +2068,7 @@
     CLICK_DATA_API: "click" + EVENT_KEY$5 + DATA_API_KEY$5
   };
   var ClassName$5 = {
+    SCROLLABLE: 'modal-dialog-scrollable',
     SCROLLBAR_MEASURER: 'modal-scrollbar-measure',
     BACKDROP: 'modal-backdrop',
     OPEN: 'modal-open',
@@ -2066,6 +2077,7 @@
   };
   var Selector$5 = {
     DIALOG: '.modal-dialog',
+    MODAL_BODY: '.modal-body',
     DATA_TOGGLE: '[data-toggle="modal"]',
     DATA_DISMISS: '[data-dismiss="modal"]',
     FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
@@ -2218,8 +2230,8 @@
 
     _proto.handleUpdate = function handleUpdate() {
       this._adjustDialog();
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$3, config);
@@ -2243,7 +2255,11 @@
 
       this._element.setAttribute('aria-modal', true);
 
-      this._element.scrollTop = 0;
+      if ($(this._dialog).hasClass(ClassName$5.SCROLLABLE)) {
+        this._dialog.querySelector(Selector$5.MODAL_BODY).scrollTop = 0;
+      } else {
+        this._element.scrollTop = 0;
+      }
 
       if (transition) {
         Util.reflow(this._element);
@@ -2413,11 +2429,11 @@
       } else if (callback) {
         callback();
       }
-    }; // ----------------------------------------------------------------------
+    } // ----------------------------------------------------------------------
     // the following methods are used to handle overflowing modals
     // todo (fat): these should probably be refactored out of modal.js
     // ----------------------------------------------------------------------
-
+    ;
 
     _proto._adjustDialog = function _adjustDialog() {
       var isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;
@@ -2502,8 +2518,8 @@
       var scrollbarWidth = scrollDiv.getBoundingClientRect().width - scrollDiv.clientWidth;
       document.body.removeChild(scrollDiv);
       return scrollbarWidth;
-    }; // Static
+    } // Static
-
+    ;
 
     Modal._jQueryInterface = function _jQueryInterface(config, relatedTarget) {
       return this.each(function () {
@@ -2594,6 +2610,127 @@
     return Modal._jQueryInterface;
   };
 
+  /**
+   * --------------------------------------------------------------------------
+   * Bootstrap (v4.3.1): tools/sanitizer.js
+   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+   * --------------------------------------------------------------------------
+   */
+  var uriAttrs = ['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href'];
+  var ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i;
+  var DefaultWhitelist = {
+    // Global attributes allowed on any supplied element below.
+    '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
+    a: ['target', 'href', 'title', 'rel'],
+    area: [],
+    b: [],
+    br: [],
+    col: [],
+    code: [],
+    div: [],
+    em: [],
+    hr: [],
+    h1: [],
+    h2: [],
+    h3: [],
+    h4: [],
+    h5: [],
+    h6: [],
+    i: [],
+    img: ['src', 'alt', 'title', 'width', 'height'],
+    li: [],
+    ol: [],
+    p: [],
+    pre: [],
+    s: [],
+    small: [],
+    span: [],
+    sub: [],
+    sup: [],
+    strong: [],
+    u: [],
+    ul: []
+    /**
+     * A pattern that recognizes a commonly useful subset of URLs that are safe.
+     *
+     * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+     */
+
+  };
+  var SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi;
+  /**
+   * A pattern that matches safe data URLs. Only matches image, video and audio types.
+   *
+   * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+   */
+
+  var DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i;
+
+  function allowedAttribute(attr, allowedAttributeList) {
+    var attrName = attr.nodeName.toLowerCase();
+
+    if (allowedAttributeList.indexOf(attrName) !== -1) {
+      if (uriAttrs.indexOf(attrName) !== -1) {
+        return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN));
+      }
+
+      return true;
+    }
+
+    var regExp = allowedAttributeList.filter(function (attrRegex) {
+      return attrRegex instanceof RegExp;
+    }); // Check if a regular expression validates the attribute.
+
+    for (var i = 0, l = regExp.length; i < l; i++) {
+      if (attrName.match(regExp[i])) {
+        return true;
+      }
+    }
+
+    return false;
+  }
+
+  function sanitizeHtml(unsafeHtml, whiteList, sanitizeFn) {
+    if (unsafeHtml.length === 0) {
+      return unsafeHtml;
+    }
+
+    if (sanitizeFn && typeof sanitizeFn === 'function') {
+      return sanitizeFn(unsafeHtml);
+    }
+
+    var domParser = new window.DOMParser();
+    var createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');
+    var whitelistKeys = Object.keys(whiteList);
+    var elements = [].slice.call(createdDocument.body.querySelectorAll('*'));
+
+    var _loop = function _loop(i, len) {
+      var el = elements[i];
+      var elName = el.nodeName.toLowerCase();
+
+      if (whitelistKeys.indexOf(el.nodeName.toLowerCase()) === -1) {
+        el.parentNode.removeChild(el);
+        return "continue";
+      }
+
+      var attributeList = [].slice.call(el.attributes);
+      var whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || []);
+      attributeList.forEach(function (attr) {
+        if (!allowedAttribute(attr, whitelistedAttributes)) {
+          el.removeAttribute(attr.nodeName);
+        }
+      });
+    };
+
+    for (var i = 0, len = elements.length; i < len; i++) {
+      var _ret = _loop(i, len);
+
+      if (_ret === "continue") continue;
+    }
+
+    return createdDocument.body.innerHTML;
+  }
+
   /**
    * ------------------------------------------------------------------------
    * Constants
@@ -2601,12 +2738,13 @@
    */
 
   var NAME$6 = 'tooltip';
-  var VERSION$6 = '4.2.1';
+  var VERSION$6 = '4.3.1';
   var DATA_KEY$6 = 'bs.tooltip';
   var EVENT_KEY$6 = "." + DATA_KEY$6;
   var JQUERY_NO_CONFLICT$6 = $.fn[NAME$6];
   var CLASS_PREFIX = 'bs-tooltip';
   var BSCLS_PREFIX_REGEX = new RegExp("(^|\\s)" + CLASS_PREFIX + "\\S+", 'g');
+  var DISALLOWED_ATTRIBUTES = ['sanitize', 'whiteList', 'sanitizeFn'];
   var DefaultType$4 = {
     animation: 'boolean',
     template: 'string',
@@ -2616,10 +2754,13 @@
     html: 'boolean',
     selector: '(string|boolean)',
     placement: '(string|function)',
-    offset: '(number|string)',
+    offset: '(number|string|function)',
     container: '(string|element|boolean)',
     fallbackPlacement: '(string|array)',
-    boundary: '(string|element)'
+    boundary: '(string|element)',
+    sanitize: 'boolean',
+    sanitizeFn: '(null|function)',
+    whiteList: 'object'
   };
   var AttachmentMap$1 = {
     AUTO: 'auto',
@@ -2640,7 +2781,10 @@
     offset: 0,
     container: false,
     fallbackPlacement: 'flip',
-    boundary: 'scrollParent'
+    boundary: 'scrollParent',
+    sanitize: true,
+    sanitizeFn: null,
+    whiteList: DefaultWhitelist
   };
   var HoverState = {
     SHOW: 'show',
@@ -2825,9 +2969,7 @@
         this._popper = new Popper(this.element, tip, {
           placement: attachment,
           modifiers: {
-            offset: {
+            offset: this._getOffset(),
-              offset: this.config.offset
-            },
             flip: {
               behavior: this.config.fallbackPlacement
             },
@@ -2936,8 +3078,8 @@
       if (this._popper !== null) {
         this._popper.scheduleUpdate();
       }
-    }; // Protected
+    } // Protected
-
+    ;
 
     _proto.isWithContent = function isWithContent() {
       return Boolean(this.getTitle());
@@ -2959,19 +3101,27 @@
     };
 
     _proto.setElementContent = function setElementContent($element, content) {
-      var html = this.config.html;
-
       if (typeof content === 'object' && (content.nodeType || content.jquery)) {
         // Content is a DOM node or a jQuery
-        if (html) {
+        if (this.config.html) {
           if (!$(content).parent().is($element)) {
             $element.empty().append(content);
           }
         } else {
           $element.text($(content).text());
         }
+
+        return;
+      }
+
+      if (this.config.html) {
+        if (this.config.sanitize) {
+          content = sanitizeHtml(content, this.config.whiteList, this.config.sanitizeFn);
+        }
+
+        $element.html(content);
       } else {
-        $element[html ? 'html' : 'text'](content);
+        $element.text(content);
       }
     };
 
@@ -2983,8 +3133,25 @@
       }
 
       return title;
-    }; // Private
+    } // Private
+    ;
 
+    _proto._getOffset = function _getOffset() {
+      var _this3 = this;
+
+      var offset = {};
+
+      if (typeof this.config.offset === 'function') {
+        offset.fn = function (data) {
+          data.offsets = _objectSpread({}, data.offsets, _this3.config.offset(data.offsets, _this3.element) || {});
+          return data;
+        };
+      } else {
+        offset.offset = this.config.offset;
+      }
+
+      return offset;
+    };
 
     _proto._getContainer = function _getContainer() {
       if (this.config.container === false) {
@@ -3003,27 +3170,27 @@
     };
 
     _proto._setListeners = function _setListeners() {
-      var _this3 = this;
+      var _this4 = this;
 
       var triggers = this.config.trigger.split(' ');
       triggers.forEach(function (trigger) {
         if (trigger === 'click') {
-          $(_this3.element).on(_this3.constructor.Event.CLICK, _this3.config.selector, function (event) {
+          $(_this4.element).on(_this4.constructor.Event.CLICK, _this4.config.selector, function (event) {
-            return _this3.toggle(event);
+            return _this4.toggle(event);
           });
         } else if (trigger !== Trigger.MANUAL) {
-          var eventIn = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSEENTER : _this3.constructor.Event.FOCUSIN;
+          var eventIn = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSEENTER : _this4.constructor.Event.FOCUSIN;
-          var eventOut = trigger === Trigger.HOVER ? _this3.constructor.Event.MOUSELEAVE : _this3.constructor.Event.FOCUSOUT;
+          var eventOut = trigger === Trigger.HOVER ? _this4.constructor.Event.MOUSELEAVE : _this4.constructor.Event.FOCUSOUT;
-          $(_this3.element).on(eventIn, _this3.config.selector, function (event) {
+          $(_this4.element).on(eventIn, _this4.config.selector, function (event) {
-            return _this3._enter(event);
+            return _this4._enter(event);
-          }).on(eventOut, _this3.config.selector, function (event) {
+          }).on(eventOut, _this4.config.selector, function (event) {
-            return _this3._leave(event);
+            return _this4._leave(event);
           });
         }
       });
       $(this.element).closest('.modal').on('hide.bs.modal', function () {
-        if (_this3.element) {
+        if (_this4.element) {
-          _this3.hide();
+          _this4.hide();
         }
       });
 
@@ -3122,7 +3289,13 @@
     };
 
     _proto._getConfig = function _getConfig(config) {
-      config = _objectSpread({}, this.constructor.Default, $(this.element).data(), typeof config === 'object' && config ? config : {});
+      var dataAttributes = $(this.element).data();
+      Object.keys(dataAttributes).forEach(function (dataAttr) {
+        if (DISALLOWED_ATTRIBUTES.indexOf(dataAttr) !== -1) {
+          delete dataAttributes[dataAttr];
+        }
+      });
+      config = _objectSpread({}, this.constructor.Default, dataAttributes, typeof config === 'object' && config ? config : {});
 
       if (typeof config.delay === 'number') {
         config.delay = {
@@ -3140,6 +3313,11 @@
       }
 
       Util.typeCheckConfig(NAME$6, config, this.constructor.DefaultType);
+
+      if (config.sanitize) {
+        config.template = sanitizeHtml(config.template, config.whiteList, config.sanitizeFn);
+      }
+
       return config;
     };
 
@@ -3188,8 +3366,8 @@
       this.hide();
       this.show();
       this.config.animation = initConfigAnimation;
-    }; // Static
+    } // Static
-
+    ;
 
     Tooltip._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -3277,7 +3455,7 @@
    */
 
   var NAME$7 = 'popover';
-  var VERSION$7 = '4.2.1';
+  var VERSION$7 = '4.3.1';
   var DATA_KEY$7 = 'bs.popover';
   var EVENT_KEY$7 = "." + DATA_KEY$7;
   var JQUERY_NO_CONFLICT$7 = $.fn[NAME$7];
@@ -3360,8 +3538,8 @@
 
       this.setElementContent($tip.find(Selector$7.CONTENT), content);
       $tip.removeClass(ClassName$7.FADE + " " + ClassName$7.SHOW);
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getContent = function _getContent() {
       return this.element.getAttribute('data-content') || this.config.content;
@@ -3374,8 +3552,8 @@
       if (tabClass !== null && tabClass.length > 0) {
         $tip.removeClass(tabClass.join(''));
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Popover._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -3464,7 +3642,7 @@
    */
 
   var NAME$8 = 'scrollspy';
-  var VERSION$8 = '4.2.1';
+  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';
@@ -3587,8 +3765,8 @@
       this._targets = null;
       this._activeTarget = null;
       this._scrollHeight = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$6, typeof config === 'object' && config ? config : {});
@@ -3695,8 +3873,8 @@
       }).forEach(function (node) {
         return node.classList.remove(ClassName$8.ACTIVE);
       });
-    }; // Static
+    } // Static
-
+    ;
 
     ScrollSpy._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -3771,7 +3949,7 @@
    */
 
   var NAME$9 = 'tab';
-  var VERSION$9 = '4.2.1';
+  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';
@@ -3879,8 +4057,8 @@
     _proto.dispose = function dispose() {
       $.removeData(this._element, DATA_KEY$9);
       this._element = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._activate = function _activate(element, container, callback) {
       var _this2 = this;
@@ -3922,7 +4100,10 @@
       }
 
       Util.reflow(element);
-      $(element).addClass(ClassName$9.SHOW);
+
+      if (element.classList.contains(ClassName$9.FADE)) {
+        element.classList.add(ClassName$9.SHOW);
+      }
 
       if (element.parentNode && $(element.parentNode).hasClass(ClassName$9.DROPDOWN_MENU)) {
         var dropdownElement = $(element).closest(Selector$9.DROPDOWN)[0];
@@ -3938,8 +4119,8 @@
       if (callback) {
         callback();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Tab._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -4003,7 +4184,7 @@
    */
 
   var NAME$a = 'toast';
-  var VERSION$a = '4.2.1';
+  var VERSION$a = '4.3.1';
   var DATA_KEY$a = 'bs.toast';
   var EVENT_KEY$a = "." + DATA_KEY$a;
   var JQUERY_NO_CONFLICT$a = $.fn[NAME$a];
@@ -4118,8 +4299,8 @@
       $.removeData(this._element, DATA_KEY$a);
       this._element = null;
       this._config = null;
-    }; // Private
+    } // Private
-
+    ;
 
     _proto._getConfig = function _getConfig(config) {
       config = _objectSpread({}, Default$7, $(this._element).data(), typeof config === 'object' && config ? config : {});
@@ -4152,8 +4333,8 @@
       } else {
         complete();
       }
-    }; // Static
+    } // Static
-
+    ;
 
     Toast._jQueryInterface = function _jQueryInterface(config) {
       return this.each(function () {
@@ -4187,6 +4368,11 @@
       get: function get() {
         return DefaultType$7;
       }
+    }, {
+      key: "Default",
+      get: function get() {
+        return Default$7;
+      }
     }]);
 
     return Toast;
@@ -4208,7 +4394,7 @@
 
   /**
    * --------------------------------------------------------------------------
-   * Bootstrap (v4.2.1): index.js
+   * Bootstrap (v4.3.1): index.js
    * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
    * --------------------------------------------------------------------------
    */
@@ -4245,5 +4431,5 @@
 
   Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
 //# sourceMappingURL=bootstrap.js.map

src/sass/bootstrap4/_badge.scss

@@ -6,13 +6,14 @@
 .badge {
   display: inline-block;
   padding: $badge-padding-y $badge-padding-x;
-  font-size: $badge-font-size;
+  @include font-size($badge-font-size);
   font-weight: $badge-font-weight;
   line-height: 1;
   text-align: center;
   white-space: nowrap;
   vertical-align: baseline;
   @include border-radius($badge-border-radius);
+  @include transition($badge-transition);
 
   @at-root a#{&} {
     @include hover-focus {

src/sass/bootstrap4/_buttons.scss

@@ -6,6 +6,7 @@
 
 .btn {
   display: inline-block;
+  font-family: $btn-font-family;
   font-weight: $btn-font-weight;
   color: $body-color;
   text-align: center;
@@ -34,11 +35,6 @@
     @include box-shadow(none);
   }
 
-  // Opinionated: add "hand" cursor to non-disabled .btn elements
-  &:not(:disabled):not(.disabled) {
-    cursor: pointer;
-  }
-
   &:not(:disabled):not(.disabled):active,
   &:not(:disabled):not(.disabled).active {
     @include box-shadow($btn-active-box-shadow);
@@ -81,6 +77,7 @@ fieldset:disabled a.btn {
 .btn-link {
   font-weight: $font-weight-normal;
   color: $link-color;
+  text-decoration: $link-decoration;
 
   @include hover {
     color: $link-hover-color;

src/sass/bootstrap4/_card.scss

@@ -6,7 +6,7 @@
   position: relative;
   display: flex;
   flex-direction: column;
-  min-width: 0;
+  min-width: 0; // See https://github.com/twbs/bootstrap/pull/22740#issuecomment-305868106
   word-wrap: break-word;
   background-color: $card-bg;
   background-clip: border-box;
@@ -36,6 +36,7 @@
   // as much space as possible, ensuring footers are aligned to the bottom.
   flex: 1 1 auto;
   padding: $card-spacer-x;
+  color: $card-color;
 }
 
 .card-title {
@@ -195,55 +196,35 @@
 
       // Handle rounded corners
       @if $enable-rounded {
-        &:first-child {
+        &:not(:last-child) {
           @include border-right-radius(0);
 
           .card-img-top,
           .card-header {
+            // stylelint-disable-next-line property-blacklist
             border-top-right-radius: 0;
           }
           .card-img-bottom,
           .card-footer {
+            // stylelint-disable-next-line property-blacklist
             border-bottom-right-radius: 0;
           }
         }
 
-        &:last-child {
+        &:not(:first-child) {
           @include border-left-radius(0);
 
           .card-img-top,
           .card-header {
+            // stylelint-disable-next-line property-blacklist
             border-top-left-radius: 0;
           }
           .card-img-bottom,
           .card-footer {
+            // stylelint-disable-next-line property-blacklist
             border-bottom-left-radius: 0;
           }
         }
-
-        &:only-child {
-          @include border-radius($card-border-radius);
-
-          .card-img-top,
-          .card-header {
-            @include border-top-radius($card-border-radius);
-          }
-          .card-img-bottom,
-          .card-footer {
-            @include border-bottom-radius($card-border-radius);
-          }
-        }
-
-        &:not(:first-child):not(:last-child):not(:only-child) {
-          @include border-radius(0);
-
-          .card-img-top,
-          .card-img-bottom,
-          .card-header,
-          .card-footer {
-            @include border-radius(0);
-          }
-        }
       }
     }
   }
@@ -278,29 +259,27 @@
 //
 
 .accordion {
-  .card {
+  > .card {
     overflow: hidden;
 
     &:not(:first-of-type) {
       .card-header:first-child {
-        border-radius: 0;
+        @include border-radius(0);
       }
 
       &:not(:last-of-type) {
         border-bottom: 0;
-        border-radius: 0;
+        @include border-radius(0);
       }
     }
 
     &:first-of-type {
       border-bottom: 0;
-      border-bottom-right-radius: 0;
+      @include border-bottom-radius(0);
-      border-bottom-left-radius: 0;
     }
 
     &:last-of-type {
-      border-top-left-radius: 0;
+      @include border-top-radius(0);
-      border-top-right-radius: 0;
     }
 
     .card-header {

src/sass/bootstrap4/_carousel.scss

@@ -127,8 +127,7 @@
   display: inline-block;
   width: $carousel-control-icon-width;
   height: $carousel-control-icon-width;
-  background: transparent no-repeat center center;
+  background: no-repeat 50% / 100% 100%;
-  background-size: 100% 100%;
 }
 .carousel-control-prev-icon {
   background-image: $carousel-control-prev-icon-bg;

src/sass/bootstrap4/_close.scss

@@ -1,6 +1,6 @@
 .close {
   float: right;
-  font-size: $close-font-size;
+  @include font-size($close-font-size);
   font-weight: $close-font-weight;
   line-height: 1;
   color: $close-color;
@@ -17,9 +17,6 @@
     @include hover-focus {
       opacity: .75;
     }
-
-    // Opinionated: add "hand" cursor to non-disabled .close elements
-    cursor: pointer;
   }
 }
 

src/sass/bootstrap4/_code.scss

@@ -1,6 +1,6 @@
 // Inline code
 code {
-  font-size: $code-font-size;
+  @include font-size($code-font-size);
   color: $code-color;
   word-break: break-word;
 
@@ -13,7 +13,7 @@ code {
 // User input typically entered via keyboard
 kbd {
   padding: $kbd-padding-y $kbd-padding-x;
-  font-size: $kbd-font-size;
+  @include font-size($kbd-font-size);
   color: $kbd-color;
   background-color: $kbd-bg;
   @include border-radius($border-radius-sm);
@@ -21,7 +21,7 @@ kbd {
 
   kbd {
     padding: 0;
-    font-size: 100%;
+    @include font-size(100%);
     font-weight: $nested-kbd-font-weight;
     @include box-shadow(none);
   }
@@ -30,12 +30,12 @@ kbd {
 // Blocks of code
 pre {
   display: block;
-  font-size: $code-font-size;
+  @include font-size($code-font-size);
   color: $pre-color;
 
   // Account for some code outputs that place code tags in pre tags
   code {
-    font-size: inherit;
+    @include font-size(inherit);
     color: inherit;
     word-break: normal;
   }

src/sass/bootstrap4/_custom-forms.scss

@@ -95,9 +95,7 @@
     width: $custom-control-indicator-size;
     height: $custom-control-indicator-size;
     content: "";
-    background-repeat: no-repeat;
+    background: no-repeat 50% / #{$custom-control-indicator-bg-size};
-    background-position: center center;
-    background-size: $custom-control-indicator-bg-size;
   }
 }
 
@@ -144,6 +142,7 @@
 
 .custom-radio {
   .custom-control-label::before {
+    // stylelint-disable-next-line property-blacklist
     border-radius: $custom-radio-indicator-border-radius;
   }
 
@@ -173,6 +172,7 @@
       left: -($custom-switch-width + $custom-control-gutter);
       width: $custom-switch-width;
       pointer-events: all;
+      // stylelint-disable-next-line property-blacklist
       border-radius: $custom-switch-indicator-border-radius;
     }
 
@@ -182,6 +182,7 @@
       width: $custom-switch-indicator-size;
       height: $custom-switch-indicator-size;
       background-color: $custom-control-indicator-border-color;
+      // stylelint-disable-next-line property-blacklist
       border-radius: $custom-switch-indicator-border-radius;
       @include transition(transform .15s ease-in-out, $custom-forms-transition);
     }
@@ -213,6 +214,8 @@
   width: 100%;
   height: $custom-select-height;
   padding: $custom-select-padding-y ($custom-select-padding-x + $custom-select-indicator-padding) $custom-select-padding-y $custom-select-padding-x;
+  font-family: $custom-select-font-family;
+  @include font-size($custom-select-font-size);
   font-weight: $custom-select-font-weight;
   line-height: $custom-select-line-height;
   color: $custom-select-color;
@@ -220,11 +223,7 @@
   background: $custom-select-background;
   background-color: $custom-select-bg;
   border: $custom-select-border-width solid $custom-select-border-color;
-  @if $enable-rounded {
+  @include border-radius($custom-select-border-radius, 0);
-    border-radius: $custom-select-border-radius;
-  } @else {
-    border-radius: 0;
-  }
   @include box-shadow($custom-select-box-shadow);
   appearance: none;
 
@@ -262,7 +261,7 @@
 
   // Hides the default caret in IE11
   &::-ms-expand {
-    opacity: 0;
+    display: none;
   }
 }
 
@@ -271,7 +270,7 @@
   padding-top: $custom-select-padding-y-sm;
   padding-bottom: $custom-select-padding-y-sm;
   padding-left: $custom-select-padding-x-sm;
-  font-size: $custom-select-font-size-sm;
+  @include font-size($custom-select-font-size-sm);
 }
 
 .custom-select-lg {
@@ -279,7 +278,7 @@
   padding-top: $custom-select-padding-y-lg;
   padding-bottom: $custom-select-padding-y-lg;
   padding-left: $custom-select-padding-x-lg;
-  font-size: $custom-select-font-size-lg;
+  @include font-size($custom-select-font-size-lg);
 }
 
 
@@ -331,6 +330,7 @@
   z-index: 1;
   height: $custom-file-height;
   padding: $custom-file-padding-y $custom-file-padding-x;
+  font-family: $custom-file-font-family;
   font-weight: $custom-file-font-weight;
   line-height: $custom-file-line-height;
   color: $custom-file-color;

src/sass/bootstrap4/_dropdown.scss

@@ -7,6 +7,8 @@
 }
 
 .dropdown-toggle {
+  white-space: nowrap;
+
   // Generate the caret automatically
   @include caret;
 }
@@ -22,8 +24,8 @@
   min-width: $dropdown-min-width;
   padding: $dropdown-padding-y 0;
   margin: $dropdown-spacer 0 0; // override default ul
-  font-size: $font-size-base; // Redeclare because nesting can cause inheritance issues
+  @include font-size($dropdown-font-size);
-  color: $body-color;
+  color: $dropdown-color;
   text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
   list-style: none;
   background-color: $dropdown-bg;
@@ -33,17 +35,6 @@
   @include box-shadow($dropdown-box-shadow);
 }
 
-@each $breakpoint in map-keys($grid-breakpoints) {
-  @include media-breakpoint-up($breakpoint) {
-    $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
-
-    .dropdown-menu#{$infix}-right {
-      right: 0;
-      left: auto;
-    }
-  }
-}
-
 @each $breakpoint in map-keys($grid-breakpoints) {
   @include media-breakpoint-up($breakpoint) {
     $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
@@ -52,6 +43,11 @@
       right: auto;
       left: 0;
     }
+
+    .dropdown-menu#{$infix}-right {
+      right: 0;
+      left: auto;
+    }
   }
 }
 
@@ -118,7 +114,7 @@
 
 // Dividers (basically an `<hr>`) within the dropdown
 .dropdown-divider {
-  @include nav-divider($dropdown-divider-bg);
+  @include nav-divider($dropdown-divider-bg, $dropdown-divider-margin-y);
 }
 
 // Links, buttons, and more within the dropdown menu
@@ -136,12 +132,16 @@
   background-color: transparent; // For `<button>`s
   border: 0; // For `<button>`s
 
-  &:first-child {
+  // Prevent dropdown overflow if there's no padding
-    @include border-top-radius($dropdown-inner-border-radius);
+  // See https://github.com/twbs/bootstrap/pull/27703
-  }
+  @if $dropdown-padding-y == 0 {
+    &:first-child {
+      @include border-top-radius($dropdown-inner-border-radius);
+    }
 
-  &:last-child {
+    &:last-child {
-    @include border-bottom-radius($dropdown-inner-border-radius);
+      @include border-bottom-radius($dropdown-inner-border-radius);
+    }
   }
 
   @include hover-focus {
@@ -178,7 +178,7 @@
   display: block;
   padding: $dropdown-padding-y $dropdown-item-padding-x;
   margin-bottom: 0; // for use with heading elements
-  font-size: $font-size-sm;
+  @include font-size($font-size-sm);
   color: $dropdown-header-color;
   white-space: nowrap; // as with > li > a
 }

src/sass/bootstrap4/_forms.scss

@@ -9,7 +9,8 @@
   width: 100%;
   height: $input-height;
   padding: $input-padding-y $input-padding-x;
-  font-size: $input-font-size;
+  font-family: $input-font-family;
+  @include font-size($input-font-size);
   font-weight: $input-font-weight;
   line-height: $input-line-height;
   color: $input-color;
@@ -18,13 +19,7 @@
   border: $input-border-width solid $input-border-color;
 
   // Note: This has no effect on <select>s in some browsers, due to the limited stylability of `<select>`s in CSS.
-  @if $enable-rounded {
+  @include border-radius($input-border-radius, 0);
-    // Manually use the if/else instead of the mixin to account for iOS override
-    border-radius: $input-border-radius;
-  } @else {
-    // Otherwise undo the iOS default
-    border-radius: 0;
-  }
 
   @include box-shadow($input-box-shadow);
   @include transition($input-transition);
@@ -88,21 +83,21 @@ select.form-control {
   padding-top: calc(#{$input-padding-y} + #{$input-border-width});
   padding-bottom: calc(#{$input-padding-y} + #{$input-border-width});
   margin-bottom: 0; // Override the `<label>/<legend>` default
-  font-size: inherit; // Override the `<legend>` default
+  @include font-size(inherit); // Override the `<legend>` default
   line-height: $input-line-height;
 }
 
 .col-form-label-lg {
   padding-top: calc(#{$input-padding-y-lg} + #{$input-border-width});
   padding-bottom: calc(#{$input-padding-y-lg} + #{$input-border-width});
-  font-size: $input-font-size-lg;
+  @include font-size($input-font-size-lg);
   line-height: $input-line-height-lg;
 }
 
 .col-form-label-sm {
   padding-top: calc(#{$input-padding-y-sm} + #{$input-border-width});
   padding-bottom: calc(#{$input-padding-y-sm} + #{$input-border-width});
-  font-size: $input-font-size-sm;
+  @include font-size($input-font-size-sm);
   line-height: $input-line-height-sm;
 }
 
@@ -142,7 +137,7 @@ select.form-control {
 .form-control-sm {
   height: $input-height-sm;
   padding: $input-padding-y-sm $input-padding-x-sm;
-  font-size: $input-font-size-sm;
+  @include font-size($input-font-size-sm);
   line-height: $input-line-height-sm;
   @include border-radius($input-border-radius-sm);
 }
@@ -150,7 +145,7 @@ select.form-control {
 .form-control-lg {
   height: $input-height-lg;
   padding: $input-padding-y-lg $input-padding-x-lg;
-  font-size: $input-font-size-lg;
+  @include font-size($input-font-size-lg);
   line-height: $input-line-height-lg;
   @include border-radius($input-border-radius-lg);
 }
@@ -163,7 +158,6 @@ select.form-control {
   }
 }
 
-// stylelint-disable-next-line no-duplicate-selectors
 textarea.form-control {
   height: auto;
 }
@@ -248,8 +242,9 @@ textarea.form-control {
 // pseudo-classes but also includes `.is-invalid` and `.is-valid` classes for
 // server side validation.
 
-@include form-validation-state("valid", $form-feedback-valid-color);
+@each $state, $data in $form-validation-states {
-@include form-validation-state("invalid", $form-feedback-invalid-color);
+  @include form-validation-state($state, map-get($data, color), map-get($data, icon));
+}
 
 // Inline forms
 //
@@ -318,6 +313,7 @@ textarea.form-control {
     }
     .form-check-input {
       position: relative;
+      flex-shrink: 0;
       margin-top: 0;
       margin-right: $form-check-input-margin-x;
       margin-left: 0;

src/sass/bootstrap4/_functions.scss

@@ -21,12 +21,12 @@
 }
 
 // Starts at zero
-// Another grid mixin that ensures the min-width of the lowest breakpoint starts at 0.
+// Used to ensure the min-width of the lowest breakpoint starts at 0.
-@mixin _assert-starts-at-zero($map) {
+@mixin _assert-starts-at-zero($map, $map-name: "$grid-breakpoints") {
   $values: map-values($map);
   $first-value: nth($values, 1);
   @if $first-value != 0 {
-    @warn "First breakpoint in `$grid-breakpoints` must start at 0, but starts at #{$first-value}.";
+    @warn "First breakpoint in #{$map-name} must start at 0, but starts at #{$first-value}.";
   }
 }
 

src/sass/bootstrap4/_images.scss

@@ -37,6 +37,6 @@
 }
 
 .figure-caption {
-  font-size: $figure-caption-font-size;
+  @include font-size($figure-caption-font-size);
   color: $figure-caption-color;
 }

src/sass/bootstrap4/_input-group.scss

@@ -104,7 +104,7 @@
   align-items: center;
   padding: $input-padding-y $input-padding-x;
   margin-bottom: 0; // Allow use of <label> elements by overriding our default margin-bottom
-  font-size: $font-size-base; // Match inputs
+  @include font-size($input-font-size); // Match inputs
   font-weight: $font-weight-normal;
   line-height: $input-line-height;
   color: $input-group-addon-color;
@@ -139,7 +139,7 @@
 .input-group-lg > .input-group-prepend > .btn,
 .input-group-lg > .input-group-append > .btn {
   padding: $input-padding-y-lg $input-padding-x-lg;
-  font-size: $input-font-size-lg;
+  @include font-size($input-font-size-lg);
   line-height: $input-line-height-lg;
   @include border-radius($input-border-radius-lg);
 }
@@ -156,7 +156,7 @@
 .input-group-sm > .input-group-prepend > .btn,
 .input-group-sm > .input-group-append > .btn {
   padding: $input-padding-y-sm $input-padding-x-sm;
-  font-size: $input-font-size-sm;
+  @include font-size($input-font-size-sm);
   line-height: $input-line-height-sm;
   @include border-radius($input-border-radius-sm);
 }

src/sass/bootstrap4/_jumbotron.scss

@@ -1,6 +1,7 @@
 .jumbotron {
   padding: $jumbotron-padding ($jumbotron-padding / 2);
   margin-bottom: $jumbotron-padding;
+  color: $jumbotron-color;
   background-color: $jumbotron-bg;
   @include border-radius($border-radius-lg);
 

src/sass/bootstrap4/_list-group.scss

@@ -24,6 +24,7 @@
 
   // Hover state
   @include hover-focus {
+    z-index: 1; // Place hover/focus items above their siblings for proper border styling
     color: $list-group-action-hover-color;
     text-decoration: none;
     background-color: $list-group-hover-bg;
@@ -46,6 +47,7 @@
   padding: $list-group-item-padding-y $list-group-item-padding-x;
   // Place the border on the list items and negative margin up for better styling
   margin-bottom: -$list-group-border-width;
+  color: $list-group-color;
   background-color: $list-group-bg;
   border: $list-group-border-width solid $list-group-border-color;
 
@@ -58,11 +60,6 @@
     @include border-bottom-radius($list-group-border-radius);
   }
 
-  @include hover-focus {
-    z-index: 1; // Place hover/active items above their siblings for proper border styling
-    text-decoration: none;
-  }
-
   &.disabled,
   &:disabled {
     color: $list-group-disabled-color;
@@ -80,6 +77,37 @@
 }
 
 
+// Horizontal
+//
+// Change the layout of list group items from vertical (default) to horizontal.
+
+@each $breakpoint in map-keys($grid-breakpoints) {
+  @include media-breakpoint-up($breakpoint) {
+    $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
+
+    .list-group-horizontal#{$infix} {
+      flex-direction: row;
+
+      .list-group-item {
+        margin-right: -$list-group-border-width;
+        margin-bottom: 0;
+
+        &:first-child {
+          @include border-left-radius($list-group-border-radius);
+          @include border-top-right-radius(0);
+        }
+
+        &:last-child {
+          margin-right: 0;
+          @include border-right-radius($list-group-border-radius);
+          @include border-bottom-left-radius(0);
+        }
+      }
+    }
+  }
+}
+
+
 // Flush list items
 //
 // Remove borders and border-radius to keep list group items edge-to-edge. Most

src/sass/bootstrap4/_mixins.scss

@@ -2,6 +2,12 @@
 //
 // Used in conjunction with global variables to enable certain theme features.
 
+// Vendor
+@import "vendor/rfs";
+
+// Deprecate
+@import "mixins/deprecate";
+
 // Utilities
 @import "mixins/breakpoints";
 @import "mixins/hover";

src/sass/bootstrap4/_modal.scss

@@ -50,17 +50,51 @@
   }
 }
 
+.modal-dialog-scrollable {
+  display: flex; // IE10/11
+  max-height: calc(100% - #{$modal-dialog-margin * 2});
+
+  .modal-content {
+    max-height: calc(100vh - #{$modal-dialog-margin * 2}); // IE10/11
+    overflow: hidden;
+  }
+
+  .modal-header,
+  .modal-footer {
+    flex-shrink: 0;
+  }
+
+  .modal-body {
+    overflow-y: auto;
+  }
+}
+
 .modal-dialog-centered {
   display: flex;
   align-items: center;
-  min-height: calc(100% - (#{$modal-dialog-margin} * 2));
+  min-height: calc(100% - #{$modal-dialog-margin * 2});
 
   // Ensure `modal-dialog-centered` extends the full height of the view (IE10/11)
   &::before {
     display: block; // IE10
-    height: calc(100vh - (#{$modal-dialog-margin} * 2));
+    height: calc(100vh - #{$modal-dialog-margin * 2});
     content: "";
   }
+
+  // Ensure `.modal-body` shows scrollbar (IE10/11)
+  &.modal-dialog-scrollable {
+    flex-direction: column;
+    justify-content: center;
+    height: 100%;
+
+    .modal-content {
+      max-height: none;
+    }
+
+    &::before {
+      content: none;
+    }
+  }
 }
 
 // Actual modal
@@ -70,6 +104,7 @@
   flex-direction: column;
   width: 100%; // Ensure `.modal-content` extends the full width of the parent `.modal-dialog`
   // counteract the pointer-events: none; in the .modal-dialog
+  color: $modal-content-color;
   pointer-events: auto;
   background-color: $modal-content-bg;
   background-clip: padding-box;
@@ -159,11 +194,19 @@
     margin: $modal-dialog-margin-y-sm-up auto;
   }
 
+  .modal-dialog-scrollable {
+    max-height: calc(100% - #{$modal-dialog-margin-y-sm-up * 2});
+
+    .modal-content {
+      max-height: calc(100vh - #{$modal-dialog-margin-y-sm-up * 2});
+    }
+  }
+
   .modal-dialog-centered {
-    min-height: calc(100% - (#{$modal-dialog-margin-y-sm-up} * 2));
+    min-height: calc(100% - #{$modal-dialog-margin-y-sm-up * 2});
 
     &::before {
-      height: calc(100vh - (#{$modal-dialog-margin-y-sm-up} * 2));
+      height: calc(100vh - #{$modal-dialog-margin-y-sm-up * 2});
     }
   }
 

src/sass/bootstrap4/_navbar.scss

@@ -44,7 +44,7 @@
   padding-top: $navbar-brand-padding-y;
   padding-bottom: $navbar-brand-padding-y;
   margin-right: $navbar-padding-x;
-  font-size: $navbar-brand-font-size;
+  @include font-size($navbar-brand-font-size);
   line-height: inherit;
   white-space: nowrap;
 
@@ -107,7 +107,7 @@
 // Button for toggling the navbar when in its collapsed state
 .navbar-toggler {
   padding: $navbar-toggler-padding-y $navbar-toggler-padding-x;
-  font-size: $navbar-toggler-font-size;
+  @include font-size($navbar-toggler-font-size);
   line-height: 1;
   background-color: transparent; // remove default button style
   border: $border-width solid transparent; // remove default button style
@@ -116,11 +116,6 @@
   @include hover-focus {
     text-decoration: none;
   }
-
-  // Opinionated: add "hand" cursor to non-disabled .navbar-toggler elements
-  &:not(:disabled):not(.disabled) {
-    cursor: pointer;
-  }
 }
 
 // Keep as a separate element so folks can easily override it with another icon
@@ -175,7 +170,7 @@
         }
 
         .navbar-collapse {
-          display: flex !important;  // stylelint-disable-line declaration-no-important
+          display: flex !important; // stylelint-disable-line declaration-no-important
 
           // Changes flex-bases to auto because of an IE10 bug
           flex-basis: auto;

src/sass/bootstrap4/_pagination.scss

@@ -27,11 +27,6 @@
     outline: $pagination-focus-outline;
     box-shadow: $pagination-focus-box-shadow;
   }
-
-  // Opinionated: add "hand" cursor to non-disabled .page-link elements
-  &:not(:disabled):not(.disabled) {
-    cursor: pointer;
-  }
 }
 
 .page-item {

src/sass/bootstrap4/_popover.scss

@@ -8,7 +8,7 @@
   // Our parent element can be arbitrary since tooltips are by default inserted as a sibling of their target element.
   // So reset our font and text properties to avoid inheriting weird values.
   @include reset-text();
-  font-size: $popover-font-size;
+  @include font-size($popover-font-size);
   // Allow breaking very long words so they don't overflow the popover's bounds
   word-wrap: break-word;
   background-color: $popover-bg;
@@ -38,72 +38,63 @@
 .bs-popover-top {
   margin-bottom: $popover-arrow-height;
 
-  .arrow {
+  > .arrow {
     bottom: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
-  }
 
-  .arrow::before,
+    &::before {
-  .arrow::after {
+      bottom: 0;
-    border-width: $popover-arrow-height ($popover-arrow-width / 2) 0;
+      border-width: $popover-arrow-height ($popover-arrow-width / 2) 0;
-  }
+      border-top-color: $popover-arrow-outer-color;
+    }
 
-  .arrow::before {
+    &::after {
-    bottom: 0;
+      bottom: $popover-border-width;
-    border-top-color: $popover-arrow-outer-color;
+      border-width: $popover-arrow-height ($popover-arrow-width / 2) 0;
-  }
+      border-top-color: $popover-arrow-color;
-
+    }
-  .arrow::after {
-    bottom: $popover-border-width;
-    border-top-color: $popover-arrow-color;
   }
 }
 
 .bs-popover-right {
   margin-left: $popover-arrow-height;
 
-  .arrow {
+  > .arrow {
     left: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
     width: $popover-arrow-height;
     height: $popover-arrow-width;
     margin: $border-radius-lg 0; // make sure the arrow does not touch the popover's rounded corners
-  }
 
-  .arrow::before,
+    &::before {
-  .arrow::after {
+      left: 0;
-    border-width: ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2) 0;
+      border-width: ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2) 0;
-  }
+      border-right-color: $popover-arrow-outer-color;
+    }
 
-  .arrow::before {
+    &::after {
-    left: 0;
+      left: $popover-border-width;
-    border-right-color: $popover-arrow-outer-color;
+      border-width: ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2) 0;
-  }
+      border-right-color: $popover-arrow-color;
-
+    }
-  .arrow::after {
-    left: $popover-border-width;
-    border-right-color: $popover-arrow-color;
   }
 }
 
 .bs-popover-bottom {
   margin-top: $popover-arrow-height;
 
-  .arrow {
+  > .arrow {
     top: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
-  }
 
-  .arrow::before,
+    &::before {
-  .arrow::after {
+      top: 0;
-    border-width: 0 ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2);
+      border-width: 0 ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2);
-  }
+      border-bottom-color: $popover-arrow-outer-color;
+    }
 
-  .arrow::before {
+    &::after {
-    top: 0;
+      top: $popover-border-width;
-    border-bottom-color: $popover-arrow-outer-color;
+      border-width: 0 ($popover-arrow-width / 2) $popover-arrow-height ($popover-arrow-width / 2);
-  }
+      border-bottom-color: $popover-arrow-color;
-
+    }
-  .arrow::after {
-    top: $popover-border-width;
-    border-bottom-color: $popover-arrow-color;
   }
 
   // This will remove the popover-header's border just below the arrow
@@ -122,26 +113,23 @@
 .bs-popover-left {
   margin-right: $popover-arrow-height;
 
-  .arrow {
+  > .arrow {
     right: calc((#{$popover-arrow-height} + #{$popover-border-width}) * -1);
     width: $popover-arrow-height;
     height: $popover-arrow-width;
     margin: $border-radius-lg 0; // make sure the arrow does not touch the popover's rounded corners
-  }
 
-  .arrow::before,
+    &::before {
-  .arrow::after {
+      right: 0;
-    border-width: ($popover-arrow-width / 2) 0 ($popover-arrow-width / 2) $popover-arrow-height;
+      border-width: ($popover-arrow-width / 2) 0 ($popover-arrow-width / 2) $popover-arrow-height;
-  }
+      border-left-color: $popover-arrow-outer-color;
+    }
 
-  .arrow::before {
+    &::after {
-    right: 0;
+      right: $popover-border-width;
-    border-left-color: $popover-arrow-outer-color;
+      border-width: ($popover-arrow-width / 2) 0 ($popover-arrow-width / 2) $popover-arrow-height;
-  }
+      border-left-color: $popover-arrow-color;
-
+    }
-  .arrow::after {
-    right: $popover-border-width;
-    border-left-color: $popover-arrow-color;
   }
 }
 
@@ -165,7 +153,7 @@
 .popover-header {
   padding: $popover-header-padding-y $popover-header-padding-x;
   margin-bottom: 0; // Reset the default from Reboot
-  font-size: $font-size-base;
+  @include font-size($font-size-base);
   color: $popover-header-color;
   background-color: $popover-header-bg;
   border-bottom: $popover-border-width solid darken($popover-header-bg, 5%);

src/sass/bootstrap4/_print.scss

@@ -51,7 +51,7 @@
     }
     pre,
     blockquote {
-      border: $border-width solid $gray-500;   // Bootstrap custom code; using `$border-width` instead of 1px
+      border: $border-width solid $gray-500; // Bootstrap custom code; using `$border-width` instead of 1px
       page-break-inside: avoid;
     }
 

src/sass/bootstrap4/_progress.scss

@@ -1,13 +1,16 @@
-@keyframes progress-bar-stripes {
+// Disable animation if transitions are disabled
-  from { background-position: $progress-height 0; }
+@if $enable-transitions {
-  to { background-position: 0 0; }
+  @keyframes progress-bar-stripes {
+    from { background-position: $progress-height 0; }
+    to { background-position: 0 0; }
+  }
 }
 
 .progress {
   display: flex;
   height: $progress-height;
   overflow: hidden; // force rounded corners by cropping it
-  font-size: $progress-font-size;
+  @include font-size($progress-font-size);
   background-color: $progress-bg;
   @include border-radius($progress-border-radius);
   @include box-shadow($progress-box-shadow);
@@ -29,6 +32,12 @@
   background-size: $progress-height $progress-height;
 }
 
-.progress-bar-animated {
+@if $enable-transitions {
-  animation: progress-bar-stripes $progress-bar-animation-timing;
+  .progress-bar-animated {
+    animation: progress-bar-stripes $progress-bar-animation-timing;
+
+    @media (prefers-reduced-motion: reduce) {
+      animation: none;
+    }
+  }
 }

src/sass/bootstrap4/_reboot.scss

@@ -46,7 +46,7 @@ article, aside, figcaption, figure, footer, header, hgroup, main, nav, section {
 body {
   margin: 0; // 1
   font-family: $font-family-base;
-  font-size: $font-size-base;
+  @include font-size($font-size-base);
   font-weight: $font-weight-base;
   line-height: $line-height-base;
   color: $body-color;
@@ -155,7 +155,7 @@ strong {
 }
 
 small {
-  font-size: 80%; // Add the correct font size in all browsers
+  @include font-size(80%); // Add the correct font size in all browsers
 }
 
 //
@@ -166,7 +166,7 @@ small {
 sub,
 sup {
   position: relative;
-  font-size: 75%;
+  @include font-size(75%);
   line-height: 0;
   vertical-align: baseline;
 }
@@ -220,7 +220,7 @@ code,
 kbd,
 samp {
   font-family: $font-family-monospace;
-  font-size: 1em; // Correct the odd `em` font sizing in all browsers.
+  @include font-size(1em); // Correct the odd `em` font sizing in all browsers.
 }
 
 pre {
@@ -297,6 +297,7 @@ label {
 //
 // Details at https://github.com/twbs/bootstrap/issues/24093
 button {
+  // stylelint-disable-next-line property-blacklist
   border-radius: 0;
 }
 
@@ -316,7 +317,7 @@ optgroup,
 textarea {
   margin: 0; // Remove the margin in Firefox and Safari
   font-family: inherit;
-  font-size: inherit;
+  @include font-size(inherit);
   line-height: inherit;
 }
 
@@ -330,6 +331,14 @@ select {
   text-transform: none; // Remove the inheritance of text transform in Firefox
 }
 
+// Remove the inheritance of word-wrap in Safari.
+//
+// Details at https://github.com/twbs/bootstrap/issues/24990
+select {
+  word-wrap: normal;
+}
+
+
 // 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
 //    controls in Android 4.
 // 2. Correct the inability to style clickable types in iOS and Safari.
@@ -340,6 +349,18 @@ button,
   -webkit-appearance: button; // 2
 }
 
+// Opinionated: add "hand" cursor to non-disabled button elements.
+@if $enable-pointer-cursor-for-buttons {
+  button,
+  [type="button"],
+  [type="reset"],
+  [type="submit"] {
+    &:not(:disabled) {
+      cursor: pointer;
+    }
+  }
+}
+
 // Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
 button::-moz-focus-inner,
 [type="button"]::-moz-focus-inner,
@@ -395,7 +416,7 @@ legend {
   max-width: 100%; // 1
   padding: 0;
   margin-bottom: .5rem;
-  font-size: 1.5rem;
+  @include font-size(1.5rem);
   line-height: inherit;
   color: inherit; // 2
   white-space: normal; // 1
@@ -421,7 +442,7 @@ progress {
 }
 
 //
-// Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
+// Remove the inner padding in Chrome and Safari on macOS.
 //
 
 [type="search"]::-webkit-search-decoration {

src/sass/bootstrap4/_spinners.scss

@@ -13,6 +13,7 @@
   vertical-align: text-bottom;
   border: $spinner-border-width solid currentColor;
   border-right-color: transparent;
+  // stylelint-disable-next-line property-blacklist
   border-radius: 50%;
   animation: spinner-border .75s linear infinite;
 }
@@ -42,6 +43,7 @@
   height: $spinner-height;
   vertical-align: text-bottom;
   background-color: currentColor;
+  // stylelint-disable-next-line property-blacklist
   border-radius: 50%;
   opacity: 0;
   animation: spinner-grow .75s linear infinite;

src/sass/bootstrap4/_tables.scss

@@ -5,6 +5,7 @@
 .table {
   width: 100%;
   margin-bottom: $spacer;
+  color: $table-color;
   background-color: $table-bg; // Reset for nesting within parents with `background-color`.
 
   th,
@@ -22,10 +23,6 @@
   tbody + tbody {
     border-top: (2 * $table-border-width) solid $table-border-color;
   }
-
-  .table {
-    background-color: $body-bg;
-  }
 }
 
 
@@ -88,6 +85,7 @@
 .table-hover {
   tbody tr {
     @include hover {
+      color: $table-hover-color;
       background-color: $table-hover-bg;
     }
   }
@@ -152,6 +150,7 @@
   &.table-hover {
     tbody tr {
       @include hover {
+        color: $table-dark-hover-color;
         background-color: $table-dark-hover-bg;
       }
     }
@@ -175,7 +174,6 @@
         width: 100%;
         overflow-x: auto;
         -webkit-overflow-scrolling: touch;
-        -ms-overflow-style: -ms-autohiding-scrollbar; // See https://github.com/twbs/bootstrap/pull/10057
 
         // Prevent double border on horizontal scroll due to use of `display: block;`
         > .table-bordered {

src/sass/bootstrap4/_toasts.scss

@@ -1,14 +1,15 @@
 .toast {
   max-width: $toast-max-width;
   overflow: hidden; // cheap rounded corners on nested items
-  font-size: $toast-font-size; // knock it down to 14px
+  @include font-size($toast-font-size);
+  color: $toast-color;
   background-color: $toast-background-color;
   background-clip: padding-box;
   border: $toast-border-width solid $toast-border-color;
-  border-radius: $toast-border-radius;
   box-shadow: $toast-box-shadow;
   backdrop-filter: blur(10px);
   opacity: 0;
+  @include border-radius($toast-border-radius);
 
   &:not(:last-child) {
     margin-bottom: $toast-padding-x;

src/sass/bootstrap4/_tooltip.scss

@@ -7,7 +7,7 @@
   // Our parent element can be arbitrary since tooltips are by default inserted as a sibling of their target element.
   // So reset our font and text properties to avoid inheriting weird values.
   @include reset-text();
-  font-size: $tooltip-font-size;
+  @include font-size($tooltip-font-size);
   // Allow breaking very long words so they don't overflow the tooltip's bounds
   word-wrap: break-word;
   opacity: 0;

src/sass/bootstrap4/_transitions.scss

@@ -1,5 +1,3 @@
-// stylelint-disable selector-no-qualifying-type
-
 .fade {
   @include transition($transition-fade);
 

src/sass/bootstrap4/_type.scss

@@ -13,36 +13,36 @@ h1, h2, h3, h4, h5, h6,
   color: $headings-color;
 }
 
-h1, .h1 { font-size: $h1-font-size; }
+h1, .h1 { @include font-size($h1-font-size); }
-h2, .h2 { font-size: $h2-font-size; }
+h2, .h2 { @include font-size($h2-font-size); }
-h3, .h3 { font-size: $h3-font-size; }
+h3, .h3 { @include font-size($h3-font-size); }
-h4, .h4 { font-size: $h4-font-size; }
+h4, .h4 { @include font-size($h4-font-size); }
-h5, .h5 { font-size: $h5-font-size; }
+h5, .h5 { @include font-size($h5-font-size); }
-h6, .h6 { font-size: $h6-font-size; }
+h6, .h6 { @include font-size($h6-font-size); }
 
 .lead {
-  font-size: $lead-font-size;
+  @include font-size($lead-font-size);
   font-weight: $lead-font-weight;
 }
 
 // Type display classes
 .display-1 {
-  font-size: $display1-size;
+  @include font-size($display1-size);
   font-weight: $display1-weight;
   line-height: $display-line-height;
 }
 .display-2 {
-  font-size: $display2-size;
+  @include font-size($display2-size);
   font-weight: $display2-weight;
   line-height: $display-line-height;
 }
 .display-3 {
-  font-size: $display3-size;
+  @include font-size($display3-size);
   font-weight: $display3-weight;
   line-height: $display-line-height;
 }
 .display-4 {
-  font-size: $display4-size;
+  @include font-size($display4-size);
   font-weight: $display4-weight;
   line-height: $display-line-height;
 }
@@ -66,7 +66,7 @@ hr {
 
 small,
 .small {
-  font-size: $small-font-size;
+  @include font-size($small-font-size);
   font-weight: $font-weight-normal;
 }
 
@@ -104,19 +104,19 @@ mark,
 
 // Builds on `abbr`
 .initialism {
-  font-size: 90%;
+  @include font-size(90%);
   text-transform: uppercase;
 }
 
 // Blockquotes
 .blockquote {
   margin-bottom: $spacer;
-  font-size: $blockquote-font-size;
+  @include font-size($blockquote-font-size);
 }
 
 .blockquote-footer {
   display: block;
-  font-size: $blockquote-small-font-size;
+  @include font-size($blockquote-small-font-size);
   color: $blockquote-small-color;
 
   &::before {

src/sass/bootstrap4/_utilities.scss

@@ -11,6 +11,7 @@
 @import "utilities/screenreaders";
 @import "utilities/shadows";
 @import "utilities/sizing";
+@import "utilities/stretched-link";
 @import "utilities/spacing";
 @import "utilities/text";
 @import "utilities/visibility";

src/sass/bootstrap4/_variables.scss

@@ -114,8 +114,11 @@ $enable-transitions:                          true !default;
 $enable-prefers-reduced-motion-media-query:   true !default;
 $enable-hover-media-query:                    false !default; // Deprecated, no longer affects any compiled CSS
 $enable-grid-classes:                         true !default;
+$enable-pointer-cursor-for-buttons:           true !default;
 $enable-print-styles:                         true !default;
+$enable-responsive-font-sizes:                false !default;
 $enable-validation-icons:                     true !default;
+$enable-deprecation-messages:                 true !default;
 
 
 // Spacing
@@ -185,38 +188,28 @@ $paragraph-margin-bottom:   1rem !default;
 // Define the minimum dimensions at which your layout will change,
 // adapting to different screen sizes, for use in media queries.
 
-$grid-breakpoints: () !default;
+$grid-breakpoints: (
-// stylelint-disable-next-line scss/dollar-variable-default
+  xs: 0,
-$grid-breakpoints: map-merge(
+  sm: 576px,
-  (
+  md: 768px,
-    xs: 0,
+  lg: 992px,
-    sm: 576px,
+  xl: 1200px
-    md: 768px,
+) !default;
-    lg: 992px,
-    xl: 1200px
-  ),
-  $grid-breakpoints
-);
 
 @include _assert-ascending($grid-breakpoints, "$grid-breakpoints");
-@include _assert-starts-at-zero($grid-breakpoints);
+@include _assert-starts-at-zero($grid-breakpoints, "$grid-breakpoints");
 
 
 // Grid containers
 //
 // Define the maximum width of `.container` for different screen sizes.
 
-$container-max-widths: () !default;
+$container-max-widths: (
-// stylelint-disable-next-line scss/dollar-variable-default
+  sm: 540px,
-$container-max-widths: map-merge(
+  md: 720px,
-  (
+  lg: 960px,
-    sm: 540px,
+  xl: 1140px
-    md: 720px,
+) !default;
-    lg: 960px,
-    xl: 1140px
-  ),
-  $container-max-widths
-);
 
 @include _assert-ascending($container-max-widths, "$container-max-widths");
 
@@ -253,6 +246,8 @@ $component-active-color:      $white !default;
 $component-active-bg:         theme-color("primary") !default;
 
 $caret-width:                 .3em !default;
+$caret-vertical-align:        $caret-width * .85 !default;
+$caret-spacing:               $caret-width * .85 !default;
 
 $transition-base:             all .2s ease-in-out !default;
 $transition-fade:             opacity .15s linear !default;
@@ -264,13 +259,13 @@ $embed-responsive-aspect-ratios: join(
   (
     (21 9),
     (16 9),
-    (3 4),
+    (4 3),
     (1 1),
   ),
   $embed-responsive-aspect-ratios
 );
 
-// Fonts
+// Typography
 //
 // Font, line-height, and color for body text, headings, and more.
 
@@ -281,8 +276,8 @@ $font-family-base:            $font-family-sans-serif !default;
 // stylelint-enable value-keyword-case
 
 $font-size-base:              1rem !default; // Assumes the browser default, typically `16px`
-$font-size-lg:                ($font-size-base * 1.25) !default;
+$font-size-lg:                $font-size-base * 1.25 !default;
-$font-size-sm:                ($font-size-base * .875) !default;
+$font-size-sm:                $font-size-base * .875 !default;
 
 $font-weight-lighter:         lighter !default;
 $font-weight-light:           300 !default;
@@ -301,10 +296,10 @@ $h5-font-size:                $font-size-base * 1.25 !default;
 $h6-font-size:                $font-size-base !default;
 
 $headings-margin-bottom:      $spacer / 2 !default;
-$headings-font-family:        inherit !default;
+$headings-font-family:        null !default;
 $headings-font-weight:        500 !default;
 $headings-line-height:        1.2 !default;
-$headings-color:              inherit !default;
+$headings-color:              null !default;
 
 $display1-size:               6rem !default;
 $display2-size:               5.5rem !default;
@@ -317,7 +312,7 @@ $display3-weight:             300 !default;
 $display4-weight:             300 !default;
 $display-line-height:         $headings-line-height !default;
 
-$lead-font-size:              ($font-size-base * 1.25) !default;
+$lead-font-size:              $font-size-base * 1.25 !default;
 $lead-font-weight:            300 !default;
 
 $small-font-size:             80% !default;
@@ -326,7 +321,7 @@ $text-muted:                  $gray-600 !default;
 
 $blockquote-small-color:      $gray-600 !default;
 $blockquote-small-font-size:  $small-font-size !default;
-$blockquote-font-size:        ($font-size-base * 1.25) !default;
+$blockquote-font-size:        $font-size-base * 1.25 !default;
 
 $hr-border-color:             rgba($black, .1) !default;
 $hr-border-width:             $border-width !default;
@@ -352,21 +347,25 @@ $hr-margin-y:                 $spacer !default;
 $table-cell-padding:          .75rem !default;
 $table-cell-padding-sm:       .3rem !default;
 
-$table-bg:                    transparent !default;
+$table-color:                 $body-color !default;
+$table-bg:                    null !default;
 $table-accent-bg:             rgba($black, .05) !default;
+$table-hover-color:           $table-color !default;
 $table-hover-bg:              rgba($black, .075) !default;
 $table-active-bg:             $table-hover-bg !default;
 
 $table-border-width:          $border-width !default;
-$table-border-color:          $gray-300 !default;
+$table-border-color:          $border-color !default;
 
 $table-head-bg:               $gray-200 !default;
 $table-head-color:            $gray-700 !default;
 
-$table-dark-bg:               $gray-900 !default;
+$table-dark-color:            $white !default;
+$table-dark-bg:               $gray-800 !default;
 $table-dark-accent-bg:        rgba($white, .05) !default;
+$table-dark-hover-color:      $table-dark-color !default;
 $table-dark-hover-bg:         rgba($white, .075) !default;
-$table-dark-border-color:     lighten($gray-900, 7.5%) !default;
+$table-dark-border-color:     lighten($table-dark-bg, 7.5%) !default;
 $table-dark-color:            $white !default;
 
 $table-striped-order:         odd !default;
@@ -383,6 +382,7 @@ $table-border-level:          -6 !default;
 
 $input-btn-padding-y:         .375rem !default;
 $input-btn-padding-x:         .75rem !default;
+$input-btn-font-family:       null !default;
 $input-btn-font-size:         $font-size-base !default;
 $input-btn-line-height:       $line-height-base !default;
 
@@ -409,6 +409,7 @@ $input-btn-border-width:      $border-width !default;
 
 $btn-padding-y:               $input-btn-padding-y !default;
 $btn-padding-x:               $input-btn-padding-x !default;
+$btn-font-family:             $input-btn-font-family !default;
 $btn-font-size:               $input-btn-font-size !default;
 $btn-line-height:             $input-btn-line-height !default;
 
@@ -449,6 +450,7 @@ $label-margin-bottom:                   .5rem !default;
 
 $input-padding-y:                       $input-btn-padding-y !default;
 $input-padding-x:                       $input-btn-padding-x !default;
+$input-font-family:                     $input-btn-font-family !default;
 $input-font-size:                       $input-btn-font-size !default;
 $input-font-weight:                     $font-weight-base !default;
 $input-line-height:                     $input-btn-line-height !default;
@@ -486,14 +488,13 @@ $input-plaintext-color:                 $body-color !default;
 
 $input-height-border:                   $input-border-width * 2 !default;
 
-$input-height-inner:                    ($input-btn-font-size * $input-btn-line-height) + ($input-btn-padding-y * 2) !default;
+$input-height-inner:                    calc(#{$input-line-height * 1em} + #{$input-padding-y * 2}) !default;
-$input-height:                          calc(#{$input-height-inner} + #{$input-height-border}) !default;
+$input-height-inner-half:               calc(#{$input-line-height * .5em} + #{$input-padding-y}) !default;
+$input-height-inner-quarter:            calc(#{$input-line-height * .25em} + #{$input-padding-y / 2}) !default;
 
-$input-height-inner-sm:                 ($input-btn-font-size-sm * $input-btn-line-height-sm) + ($input-btn-padding-y-sm * 2) !default;
+$input-height:                          calc(#{$input-line-height * 1em} + #{$input-padding-y * 2} + #{$input-height-border}) !default;
-$input-height-sm:                       calc(#{$input-height-inner-sm} + #{$input-height-border}) !default;
+$input-height-sm:                       calc(#{$input-line-height-sm * 1em} + #{$input-btn-padding-y-sm * 2} + #{$input-height-border}) !default;
-
+$input-height-lg:                       calc(#{$input-line-height-lg * 1em} + #{$input-btn-padding-y-lg * 2} + #{$input-height-border}) !default;
-$input-height-inner-lg:                 ($input-btn-font-size-lg * $input-btn-line-height-lg) + ($input-btn-padding-y-lg * 2) !default;
-$input-height-lg:                       calc(#{$input-height-inner-lg} + #{$input-height-border}) !default;
 
 $input-transition:                      border-color .15s ease-in-out, box-shadow .15s ease-in-out !default;
 
@@ -535,7 +536,7 @@ $custom-control-indicator-checked-disabled-bg:  rgba(theme-color("primary"), .5)
 $custom-control-indicator-checked-box-shadow:   none !default;
 $custom-control-indicator-checked-border-color: $custom-control-indicator-checked-bg !default;
 
-$custom-control-indicator-focus-box-shadow:     $input-btn-focus-box-shadow !default;
+$custom-control-indicator-focus-box-shadow:     $input-focus-box-shadow !default;
 $custom-control-indicator-focus-border-color:   $input-focus-border-color !default;
 
 $custom-control-indicator-active-color:         $component-active-color !default;
@@ -559,8 +560,10 @@ $custom-switch-width:                           $custom-control-indicator-size *
 $custom-switch-indicator-border-radius:         $custom-control-indicator-size / 2 !default;
 $custom-switch-indicator-size:                  calc(#{$custom-control-indicator-size} - #{$custom-control-indicator-border-width * 4}) !default;
 
-$custom-select-padding-y:           $input-btn-padding-y !default;
+$custom-select-padding-y:           $input-padding-y !default;
-$custom-select-padding-x:           $input-btn-padding-x !default;
+$custom-select-padding-x:           $input-padding-x !default;
+$custom-select-font-family:         $input-font-family !default;
+$custom-select-font-size:           $input-font-size !default;
 $custom-select-height:              $input-height !default;
 $custom-select-indicator-padding:   1rem !default; // Extra padding to account for the presence of the background-image based indicator
 $custom-select-font-weight:         $input-font-weight !default;
@@ -574,9 +577,9 @@ $custom-select-indicator-color:     $gray-800 !default;
 $custom-select-indicator:           str-replace(url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3e%3cpath fill='#{$custom-select-indicator-color}' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e"), "#", "%23") !default;
 $custom-select-background:          $custom-select-indicator no-repeat right $custom-select-padding-x center / $custom-select-bg-size !default; // Used so we can have multiple background elements (e.g., arrow and feedback icon)
 
-$custom-select-feedback-icon-padding-right: $input-height-inner * 3 / 4 + $custom-select-padding-x + $custom-select-indicator-padding !default;
+$custom-select-feedback-icon-padding-right: calc((1em + #{2 * $custom-select-padding-y}) * 3 / 4 + #{$custom-select-padding-x + $custom-select-indicator-padding}) !default;
 $custom-select-feedback-icon-position:      center right ($custom-select-padding-x + $custom-select-indicator-padding) !default;
-$custom-select-feedback-icon-size:          ($input-height-inner / 2) ($input-height-inner / 2) !default;
+$custom-select-feedback-icon-size:          $input-height-inner-half $input-height-inner-half !default;
 
 $custom-select-border-width:        $input-border-width !default;
 $custom-select-border-color:        $input-border-color !default;
@@ -585,16 +588,16 @@ $custom-select-box-shadow:          inset 0 1px 2px rgba($black, .075) !default;
 
 $custom-select-focus-border-color:  $input-focus-border-color !default;
 $custom-select-focus-width:         $input-focus-width !default;
-$custom-select-focus-box-shadow:    0 0 0 $custom-select-focus-width rgba($custom-select-focus-border-color, .5) !default;
+$custom-select-focus-box-shadow:    0 0 0 $custom-select-focus-width $input-btn-focus-color !default;
 
 $custom-select-padding-y-sm:        $input-padding-y-sm !default;
 $custom-select-padding-x-sm:        $input-padding-x-sm !default;
-$custom-select-font-size-sm:        $input-btn-font-size-sm !default;
+$custom-select-font-size-sm:        $input-font-size-sm !default;
 $custom-select-height-sm:           $input-height-sm !default;
 
 $custom-select-padding-y-lg:        $input-padding-y-lg !default;
 $custom-select-padding-x-lg:        $input-padding-x-lg !default;
-$custom-select-font-size-lg:        $input-btn-font-size-lg !default;
+$custom-select-font-size-lg:        $input-font-size-lg !default;
 $custom-select-height-lg:           $input-height-lg !default;
 
 $custom-range-track-width:          100% !default;
@@ -624,6 +627,7 @@ $custom-file-disabled-bg:           $input-disabled-bg !default;
 $custom-file-padding-y:             $input-padding-y !default;
 $custom-file-padding-x:             $input-padding-x !default;
 $custom-file-line-height:           $input-line-height !default;
+$custom-file-font-family:           $input-font-family !default;
 $custom-file-font-weight:           $input-font-weight !default;
 $custom-file-color:                 $input-color !default;
 $custom-file-bg:                    $input-bg !default;
@@ -648,38 +652,23 @@ $form-feedback-invalid-color:       theme-color("danger") !default;
 $form-feedback-icon-valid-color:    $form-feedback-valid-color !default;
 $form-feedback-icon-valid:          str-replace(url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='#{$form-feedback-icon-valid-color}' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e"), "#", "%23") !default;
 $form-feedback-icon-invalid-color:  $form-feedback-invalid-color !default;
-$form-feedback-icon-invalid:        str-replace(url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='#{$form-feedback-icon-invalid-color}' viewBox='-2 -2 7 7'%3e%3cpath stroke='%23d9534f' d='M0 0l3 3m0-3L0 3'/%3e%3ccircle r='.5'/%3e%3ccircle cx='3' r='.5'/%3e%3ccircle cy='3' r='.5'/%3e%3ccircle cx='3' cy='3' r='.5'/%3e%3c/svg%3E"), "#", "%23") !default;
+$form-feedback-icon-invalid:        str-replace(url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='#{$form-feedback-icon-invalid-color}' viewBox='-2 -2 7 7'%3e%3cpath stroke='#{$form-feedback-icon-invalid-color}' d='M0 0l3 3m0-3L0 3'/%3e%3ccircle r='.5'/%3e%3ccircle cx='3' r='.5'/%3e%3ccircle cy='3' r='.5'/%3e%3ccircle cx='3' cy='3' r='.5'/%3e%3c/svg%3E"), "#", "%23") !default;
-
-
-// Dropdowns
-//
-// Dropdown menu container and contents.
-
-$dropdown-min-width:                10rem !default;
-$dropdown-padding-y:                .5rem !default;
-$dropdown-spacer:                   .125rem !default;
-$dropdown-bg:                       $white !default;
-$dropdown-border-color:             rgba($black, .15) !default;
-$dropdown-border-radius:            $border-radius !default;
-$dropdown-border-width:             $border-width !default;
-$dropdown-inner-border-radius:      calc(#{$dropdown-border-radius} - #{$dropdown-border-width}) !default;
-$dropdown-divider-bg:               $gray-200 !default;
-$dropdown-box-shadow:               0 .5rem 1rem rgba($black, .175) !default;
-
-$dropdown-link-color:               $gray-900 !default;
-$dropdown-link-hover-color:         darken($gray-900, 5%) !default;
-$dropdown-link-hover-bg:            $gray-100 !default;
-
-$dropdown-link-active-color:        $component-active-color !default;
-$dropdown-link-active-bg:           $component-active-bg !default;
-
-$dropdown-link-disabled-color:      $gray-600 !default;
-
-$dropdown-item-padding-y:           .25rem !default;
-$dropdown-item-padding-x:           1.5rem !default;
-
-$dropdown-header-color:             $gray-600 !default;
 
+$form-validation-states: () !default;
+// stylelint-disable-next-line scss/dollar-variable-default
+$form-validation-states: map-merge(
+  (
+    "valid": (
+      "color": $form-feedback-valid-color,
+      "icon": $form-feedback-icon-valid
+    ),
+    "invalid": (
+      "color": $form-feedback-invalid-color,
+      "icon": $form-feedback-icon-invalid
+    ),
+  ),
+  $form-validation-states
+);
 
 // Z-index master list
 //
@@ -755,6 +744,39 @@ $navbar-dark-brand-color:                 $navbar-dark-active-color !default;
 $navbar-dark-brand-hover-color:           $navbar-dark-active-color !default;
 
 
+// Dropdowns
+//
+// Dropdown menu container and contents.
+
+$dropdown-min-width:                10rem !default;
+$dropdown-padding-y:                .5rem !default;
+$dropdown-spacer:                   .125rem !default;
+$dropdown-font-size:                $font-size-base !default;
+$dropdown-color:                    $body-color !default;
+$dropdown-bg:                       $white !default;
+$dropdown-border-color:             rgba($black, .15) !default;
+$dropdown-border-radius:            $border-radius !default;
+$dropdown-border-width:             $border-width !default;
+$dropdown-inner-border-radius:      calc(#{$dropdown-border-radius} - #{$dropdown-border-width}) !default;
+$dropdown-divider-bg:               $gray-200 !default;
+$dropdown-divider-margin-y:         $nav-divider-margin-y !default;
+$dropdown-box-shadow:               0 .5rem 1rem rgba($black, .175) !default;
+
+$dropdown-link-color:               $gray-900 !default;
+$dropdown-link-hover-color:         darken($gray-900, 5%) !default;
+$dropdown-link-hover-bg:            $gray-100 !default;
+
+$dropdown-link-active-color:        $component-active-color !default;
+$dropdown-link-active-bg:           $component-active-bg !default;
+
+$dropdown-link-disabled-color:      $gray-600 !default;
+
+$dropdown-item-padding-y:           .25rem !default;
+$dropdown-item-padding-x:           1.5rem !default;
+
+$dropdown-header-color:             $gray-600 !default;
+
+
 // Pagination
 
 $pagination-padding-y:              .5rem !default;
@@ -789,6 +811,7 @@ $pagination-disabled-border-color:  $gray-300 !default;
 // Jumbotron
 
 $jumbotron-padding:                 2rem !default;
+$jumbotron-color:                   null !default;
 $jumbotron-bg:                      $gray-200 !default;
 
 
@@ -801,7 +824,8 @@ $card-border-radius:                $border-radius !default;
 $card-border-color:                 rgba($black, .125) !default;
 $card-inner-border-radius:          calc(#{$card-border-radius} - #{$card-border-width}) !default;
 $card-cap-bg:                       rgba($black, .03) !default;
-$card-cap-color:                    inherit !default;
+$card-cap-color:                    null !default;
+$card-color:                        null !default;
 $card-bg:                           $white !default;
 
 $card-img-overlay-padding:          1.25rem !default;
@@ -866,19 +890,21 @@ $popover-arrow-outer-color:         fade-in($popover-border-color, .05) !default
 
 
 // Toasts
-$toast-max-width: 350px !default;
-$toast-padding-x: .75rem !default;
-$toast-padding-y: .25rem !default;
-$toast-font-size: .875rem !default;
-$toast-background-color: rgba($white, .85) !default;
-$toast-border-width: 1px !default;
-$toast-border-color: rgba(0, 0, 0, .1) !default;
-$toast-border-radius: .25rem !default;
-$toast-box-shadow: 0 .25rem .75rem rgba($black, .1) !default;
 
-$toast-header-color: $gray-600 !default;
+$toast-max-width:                   350px !default;
-$toast-header-background-color: rgba($white, .85) !default;
+$toast-padding-x:                   .75rem !default;
-$toast-header-border-color: rgba(0, 0, 0, .05) !default;
+$toast-padding-y:                   .25rem !default;
+$toast-font-size:                   .875rem !default;
+$toast-color:                       null !default;
+$toast-background-color:            rgba($white, .85) !default;
+$toast-border-width:                1px !default;
+$toast-border-color:                rgba(0, 0, 0, .1) !default;
+$toast-border-radius:               .25rem !default;
+$toast-box-shadow:                  0 .25rem .75rem rgba($black, .1) !default;
+
+$toast-header-color:                $gray-600 !default;
+$toast-header-background-color:     rgba($white, .85) !default;
+$toast-header-border-color:         rgba(0, 0, 0, .05) !default;
 
 
 // Badges
@@ -889,6 +915,9 @@ $badge-padding-y:                   .25em !default;
 $badge-padding-x:                   .4em !default;
 $badge-border-radius:               $border-radius !default;
 
+$badge-transition:                  $btn-transition !default;
+$badge-focus-width:                 $input-btn-focus-width !default;
+
 $badge-pill-padding-x:              .6em !default;
 // Use a higher than normal value to ensure completely rounded edges when
 // customizing padding or font-size on labels.
@@ -905,6 +934,7 @@ $modal-dialog-margin-y-sm-up:       1.75rem !default;
 
 $modal-title-line-height:           $line-height-base !default;
 
+$modal-content-color:               null !default;
 $modal-content-bg:                  $white !default;
 $modal-content-border-color:        rgba($black, .2) !default;
 $modal-content-border-width:        $border-width !default;
@@ -914,7 +944,7 @@ $modal-content-box-shadow-sm-up:    0 .5rem 1rem rgba($black, .5) !default;
 
 $modal-backdrop-bg:                 $black !default;
 $modal-backdrop-opacity:            .5 !default;
-$modal-header-border-color:         $gray-200 !default;
+$modal-header-border-color:         $border-color !default;
 $modal-footer-border-color:         $modal-header-border-color !default;
 $modal-header-border-width:         $modal-content-border-width !default;
 $modal-footer-border-width:         $modal-header-border-width !default;
@@ -951,7 +981,7 @@ $alert-color-level:                 6 !default;
 // Progress bars
 
 $progress-height:                   1rem !default;
-$progress-font-size:                ($font-size-base * .75) !default;
+$progress-font-size:                $font-size-base * .75 !default;
 $progress-bg:                       $gray-200 !default;
 $progress-border-radius:            $border-radius !default;
 $progress-box-shadow:               inset 0 .1rem .1rem rgba($black, .1) !default;
@@ -963,6 +993,7 @@ $progress-bar-transition:           width .6s ease !default;
 
 // List group
 
+$list-group-color:                  null !default;
 $list-group-bg:                     $white !default;
 $list-group-border-color:           rgba($black, .125) !default;
 $list-group-border-width:           $border-width !default;
@@ -1081,6 +1112,7 @@ $pre-scrollable-max-height:         340px !default;
 
 // Utilities
 
+$displays: none, inline, inline-block, block, table, table-row, table-cell, flex, inline-flex !default;
 $overflows: auto, hidden !default;
 $positions: static, relative, absolute, fixed, sticky !default;
 

src/sass/bootstrap4/bootstrap-grid.scss

@@ -1,7 +1,7 @@
 /*!
- * Bootstrap Grid v4.2.1 (https://getbootstrap.com/)
+ * Bootstrap Grid v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2018 The Bootstrap Authors
+ * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2018 Twitter, Inc.
+ * Copyright 2011-2019 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 

src/sass/bootstrap4/bootstrap-reboot.scss

@@ -1,7 +1,7 @@
 /*!
- * Bootstrap Reboot v4.2.1 (https://getbootstrap.com/)
+ * Bootstrap Reboot v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2018 The Bootstrap Authors
+ * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2018 Twitter, Inc.
+ * Copyright 2011-2019 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  * Forked from Normalize.css, licensed MIT (https://github.com/necolas/normalize.css/blob/master/LICENSE.md)
  */

src/sass/bootstrap4/bootstrap.scss

@@ -1,7 +1,7 @@
 /*!
- * Bootstrap v4.2.1 (https://getbootstrap.com/)
+ * Bootstrap v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2018 The Bootstrap Authors
+ * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2018 Twitter, Inc.
+ * Copyright 2011-2019 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 

src/sass/bootstrap4/mixins/_badge.scss

@@ -7,5 +7,11 @@
       color: color-yiq($bg);
       background-color: darken($bg, 10%);
     }
+
+    &:focus,
+    &.focus {
+      outline: 0;
+      box-shadow: 0 0 0 $badge-focus-width rgba($bg, .5);
+    }
   }
 }

src/sass/bootstrap4/mixins/_border-radius.scss

@@ -1,9 +1,13 @@
+// stylelint-disable property-blacklist
 // Single side border-radius
 
-@mixin border-radius($radius: $border-radius) {
+@mixin border-radius($radius: $border-radius, $fallback-border-radius: false) {
   @if $enable-rounded {
     border-radius: $radius;
   }
+  @else if $fallback-border-radius != false {
+    border-radius: $fallback-border-radius;
+  }
 }
 
 @mixin border-top-radius($radius) {
@@ -33,3 +37,27 @@
     border-bottom-left-radius: $radius;
   }
 }
+
+@mixin border-top-left-radius($radius) {
+  @if $enable-rounded {
+    border-top-left-radius: $radius;
+  }
+}
+
+@mixin border-top-right-radius($radius) {
+  @if $enable-rounded {
+    border-top-right-radius: $radius;
+  }
+}
+
+@mixin border-bottom-right-radius($radius) {
+  @if $enable-rounded {
+    border-bottom-right-radius: $radius;
+  }
+}
+
+@mixin border-bottom-left-radius($radius) {
+  @if $enable-rounded {
+    border-bottom-left-radius: $radius;
+  }
+}

src/sass/bootstrap4/mixins/_box-shadow.scss

@@ -1,5 +1,20 @@
 @mixin box-shadow($shadow...) {
   @if $enable-shadows {
-    box-shadow: $shadow;
+    $result: ();
+
+    @if (length($shadow) == 1) {
+      // We can pass `@include box-shadow(none);`
+      $result: $shadow;
+    } @else {
+      // Filter to avoid invalid properties for example `box-shadow: none, 1px 1px black;`
+      @for $i from 1 through length($shadow) {
+        @if nth($shadow, $i) != "none" {
+          $result: append($result, nth($shadow, $i), "comma");
+        }
+      }
+    }
+    @if (length($result) > 0) {
+      box-shadow: $result;
+    }
   }
 }

src/sass/bootstrap4/mixins/_buttons.scss

@@ -49,7 +49,7 @@
 
     &:focus {
       // Avoid using mixin so we can pass custom focus shadow properly
-      @if $enable-shadows {
+      @if $enable-shadows and $btn-active-box-shadow != none {
         box-shadow: $btn-active-box-shadow, 0 0 0 $btn-focus-width rgba(mix(color-yiq($background), $border, 15%), .5);
       } @else {
         box-shadow: 0 0 0 $btn-focus-width rgba(mix(color-yiq($background), $border, 15%), .5);
@@ -100,12 +100,8 @@
 // Button sizes
 @mixin button-size($padding-y, $padding-x, $font-size, $line-height, $border-radius) {
   padding: $padding-y $padding-x;
-  font-size: $font-size;
+  @include font-size($font-size);
   line-height: $line-height;
   // Manually declare to provide an override to the browser default
-  @if $enable-rounded {
+  @include border-radius($border-radius, 0);
-    border-radius: $border-radius;
-  } @else {
-    border-radius: 0;
-  }
 }

src/sass/bootstrap4/mixins/_caret.scss

@@ -29,8 +29,8 @@
   @if $enable-caret {
     &::after {
       display: inline-block;
-      margin-left: $caret-width * .85;
+      margin-left: $caret-spacing;
-      vertical-align: $caret-width * .85;
+      vertical-align: $caret-vertical-align;
       content: "";
       @if $direction == down {
         @include caret-down;
@@ -48,8 +48,8 @@
 
       &::before {
         display: inline-block;
-        margin-right: $caret-width * .85;
+        margin-right: $caret-spacing;
-        vertical-align: $caret-width * .85;
+        vertical-align: $caret-vertical-align;
         content: "";
         @include caret-left;
       }

src/sass/bootstrap4/mixins/_float.scss

@@ -2,10 +2,13 @@
 
 @mixin float-left {
   float: left !important;
+  @include deprecate("The `float-left` mixin", "v4.3.0", "v5");
 }
 @mixin float-right {
   float: right !important;
+  @include deprecate("The `float-right` mixin", "v4.3.0", "v5");
 }
 @mixin float-none {
   float: none !important;
+  @include deprecate("The `float-none` mixin", "v4.3.0", "v5");
 }

src/sass/bootstrap4/mixins/_forms.scss

@@ -26,12 +26,12 @@
 }
 
 
-@mixin form-validation-state($state, $color) {
+@mixin form-validation-state($state, $color, $icon) {
   .#{$state}-feedback {
     display: none;
     width: 100%;
     margin-top: $form-feedback-margin-top;
-    font-size: $form-feedback-font-size;
+    @include font-size($form-feedback-font-size);
     color: $color;
   }
 
@@ -43,7 +43,7 @@
     max-width: 100%; // Contain to parent when possible
     padding: $form-feedback-tooltip-padding-y $form-feedback-tooltip-padding-x;
     margin-top: .1rem;
-    font-size: $form-feedback-tooltip-font-size;
+    @include font-size($form-feedback-tooltip-font-size);
     line-height: $form-feedback-tooltip-line-height;
     color: color-yiq($color);
     background-color: rgba($color, $form-feedback-tooltip-opacity);
@@ -57,15 +57,10 @@
 
       @if $enable-validation-icons {
         padding-right: $input-height-inner;
+        background-image: $icon;
         background-repeat: no-repeat;
-        background-position: center right calc(#{$input-height-inner} / 4);
+        background-position: center right $input-height-inner-quarter;
-        background-size: calc(#{$input-height-inner} / 2) calc(#{$input-height-inner} / 2);
+        background-size: $input-height-inner-half $input-height-inner-half;
-
-        @if $state == "valid" {
-          background-image: $form-feedback-icon-valid;
-        } @else {
-          background-image: $form-feedback-icon-invalid;
-        }
       }
 
       &:focus {
@@ -86,7 +81,7 @@
     &.is-#{$state} {
       @if $enable-validation-icons {
         padding-right: $input-height-inner;
-        background-position: top calc(#{$input-height-inner} / 4) right calc(#{$input-height-inner} / 4);
+        background-position: top $input-height-inner-quarter right $input-height-inner-quarter;
       }
     }
   }
@@ -97,9 +92,8 @@
       border-color: $color;
 
       @if $enable-validation-icons {
-        $form-feedback-icon: if($state == "valid", $form-feedback-icon-valid, $form-feedback-icon-invalid);
         padding-right: $custom-select-feedback-icon-padding-right;
-        background: $custom-select-background, $form-feedback-icon no-repeat $custom-select-feedback-icon-position / $custom-select-feedback-icon-size;
+        background: $custom-select-background, $icon $custom-select-bg no-repeat $custom-select-feedback-icon-position / $custom-select-feedback-icon-size;
       }
 
       &:focus {

src/sass/bootstrap4/mixins/_image.scss

@@ -20,7 +20,6 @@
 //
 // Short retina mixin for setting background-image and -size.
 
-// stylelint-disable indentation, media-query-list-comma-newline-after
 @mixin img-retina($file-1x, $file-2x, $width-1x, $height-1x) {
   background-image: url($file-1x);
 
@@ -29,8 +28,9 @@
   // There's no such thing as unprefixed min-device-pixel-ratio since it's nonstandard.
   // Compatibility info: https://caniuse.com/#feat=css-media-resolution
   @media only screen and (min-resolution: 192dpi), // IE9-11 don't support dppx
-  only screen and (min-resolution: 2dppx) { // Standardized
+    only screen and (min-resolution: 2dppx) { // Standardized
     background-image: url($file-2x);
     background-size: $width-1x $height-1x;
   }
+  @include deprecate("`img-retina()`", "v4.3.0", "v5");
 }

src/sass/bootstrap4/mixins/_pagination.scss

@@ -3,7 +3,7 @@
 @mixin pagination-size($padding-y, $padding-x, $font-size, $line-height, $border-radius) {
   .page-link {
     padding: $padding-y $padding-x;
-    font-size: $font-size;
+    @include font-size($font-size);
     line-height: $line-height;
   }
 

src/sass/bootstrap4/mixins/_reset-text.scss

@@ -5,7 +5,7 @@
   font-weight: $font-weight-normal;
   line-height: $line-height-base;
   text-align: left; // Fallback for where `start` is not supported
-  text-align: start; // stylelint-disable-line declaration-block-no-duplicate-properties
+  text-align: start;
   text-decoration: none;
   text-shadow: none;
   text-transform: none;

src/sass/bootstrap4/mixins/_size.scss

@@ -3,4 +3,5 @@
 @mixin size($width, $height: $width) {
   width: $width;
   height: $height;
+  @include deprecate("`size()`", "v4.3.0", "v5");
 }

src/sass/bootstrap4/mixins/_text-emphasis.scss

@@ -6,9 +6,11 @@
   #{$parent} {
     color: $color !important;
   }
-  a#{$parent} {
+  @if $emphasized-link-hover-darken-percentage != 0 {
-    @include hover-focus {
+    a#{$parent} {
-      color: darken($color, $emphasized-link-hover-darken-percentage) !important;
+      @include hover-focus {
+        color: darken($color, $emphasized-link-hover-darken-percentage) !important;
+      }
     }
   }
 }

src/sass/bootstrap4/mixins/_text-hide.scss

@@ -7,7 +7,5 @@
   background-color: transparent;
   border: 0;
 
-  @if ($ignore-warning != true) {
+  @include deprecate("`text-hide()`", "v4.1.0", "v5", $ignore-warning);
-    @warn "The `text-hide()` mixin has been deprecated as of v4.1.0. It will be removed entirely in v5.";
-  }
 }

src/sass/bootstrap4/mixins/_transition.scss

@@ -9,7 +9,7 @@
   }
 
   @if $enable-prefers-reduced-motion-media-query {
-    @media screen and (prefers-reduced-motion: reduce) {
+    @media (prefers-reduced-motion: reduce) {
       transition: none;
     }
   }

src/sass/bootstrap4/mixins/_visibility.scss

@@ -4,4 +4,5 @@
 
 @mixin invisible($visibility) {
   visibility: $visibility !important;
+  @include deprecate("`invisible()`", "v4.3.0", "v5");
 }

src/sass/bootstrap4/utilities/_borders.scss

@@ -1,4 +1,4 @@
-// stylelint-disable declaration-no-important
+// stylelint-disable property-blacklist, declaration-no-important
 
 //
 // Border
@@ -30,26 +30,38 @@
 // Border-radius
 //
 
+.rounded-sm {
+  border-radius: $border-radius-sm !important;
+}
+
 .rounded {
   border-radius: $border-radius !important;
 }
+
 .rounded-top {
   border-top-left-radius: $border-radius !important;
   border-top-right-radius: $border-radius !important;
 }
+
 .rounded-right {
   border-top-right-radius: $border-radius !important;
   border-bottom-right-radius: $border-radius !important;
 }
+
 .rounded-bottom {
   border-bottom-right-radius: $border-radius !important;
   border-bottom-left-radius: $border-radius !important;
 }
+
 .rounded-left {
   border-top-left-radius: $border-radius !important;
   border-bottom-left-radius: $border-radius !important;
 }
 
+.rounded-lg {
+  border-radius: $border-radius-lg !important;
+}
+
 .rounded-circle {
   border-radius: 50% !important;
 }

src/sass/bootstrap4/utilities/_display.scss

@@ -8,15 +8,9 @@
   @include media-breakpoint-up($breakpoint) {
     $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
 
-    .d#{$infix}-none         { display: none !important; }
+    @each $value in $displays {
-    .d#{$infix}-inline       { display: inline !important; }
+      .d#{$infix}-#{$value} { display: $value !important; }
-    .d#{$infix}-inline-block { display: inline-block !important; }
+    }
-    .d#{$infix}-block        { display: block !important; }
-    .d#{$infix}-table        { display: table !important; }
-    .d#{$infix}-table-row    { display: table-row !important; }
-    .d#{$infix}-table-cell   { display: table-cell !important; }
-    .d#{$infix}-flex         { display: flex !important; }
-    .d#{$infix}-inline-flex  { display: inline-flex !important; }
   }
 }
 
@@ -26,13 +20,7 @@
 //
 
 @media print {
-  .d-print-none         { display: none !important; }
+  @each $value in $displays {
-  .d-print-inline       { display: inline !important; }
+    .d-print-#{$value} { display: $value !important; }
-  .d-print-inline-block { display: inline-block !important; }
+  }
-  .d-print-block        { display: block !important; }
-  .d-print-table        { display: table !important; }
-  .d-print-table-row    { display: table-row !important; }
-  .d-print-table-cell   { display: table-cell !important; }
-  .d-print-flex         { display: flex !important; }
-  .d-print-inline-flex  { display: inline-flex !important; }
 }

src/sass/bootstrap4/utilities/_float.scss

@@ -1,9 +1,11 @@
+// stylelint-disable declaration-no-important
+
 @each $breakpoint in map-keys($grid-breakpoints) {
   @include media-breakpoint-up($breakpoint) {
     $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
 
-    .float#{$infix}-left  { @include float-left; }
+    .float#{$infix}-left  { float: left !important; }
-    .float#{$infix}-right { @include float-right; }
+    .float#{$infix}-right { float: right !important; }
-    .float#{$infix}-none  { @include float-none; }
+    .float#{$infix}-none  { float: none !important; }
   }
 }

src/sass/bootstrap4/utilities/_text.scss

@@ -4,7 +4,7 @@
 // Text
 //
 
-.text-monospace { font-family: $font-family-monospace; }
+.text-monospace { font-family: $font-family-monospace !important; }
 
 // Alignment
 
@@ -62,6 +62,11 @@
 
 .text-decoration-none { text-decoration: none !important; }
 
+.text-break {
+  word-break: break-word !important; // IE & < Edge 18
+  overflow-wrap: break-word !important;
+}
+
 // Reset
 
 .text-reset { color: inherit !important; }

src/sass/bootstrap4/utilities/_visibility.scss

@@ -1,11 +1,13 @@
+// stylelint-disable declaration-no-important
+
 //
 // Visibility utilities
 //
 
 .visible {
-  @include invisible(visible);
+  visibility: visible !important;
 }
 
 .invisible {
-  @include invisible(hidden);
+  visibility: hidden !important;
 }

src/sass/bootstrap4/vendor/_rfs.scss

@@ -202,11 +202,3 @@ $rfs-breakpoint-unit-cache: unit($rfs-breakpoint);
 @mixin responsive-font-size($fs, $important: false) {
   @include rfs($fs, $important);
 }
-
-$rfs-is-included: false !default;
-
-@if $rfs-is-included {
-  @warn "Watch out, RFS is included more than once!";
-}
-
-$rfs-is-included: true;