Update bootstrap

_sass/bootstrap/mixins/_background-variant.scss

@@ -2,16 +2,17 @@
 
 // Contextual backgrounds
 
-@mixin bg-variant($parent, $color) {
+@mixin bg-variant($parent, $color, $ignore-warning: false) {
   #{$parent} {
     background-color: $color !important;
   }
   a#{$parent},
   button#{$parent} {
-    @include hover-focus {
+    @include hover-focus() {
       background-color: darken($color, 10%) !important;
     }
   }
+  @include deprecate("The `bg-variant` mixin", "v4.4.0", "v5", $ignore-warning);
 }
 
 @mixin bg-gradient-variant($parent, $color) {

_sass/bootstrap/mixins/_badge.scss

@@ -3,7 +3,7 @@
   background-color: $bg;
 
   @at-root a#{&} {
-    @include hover-focus {
+    @include hover-focus() {
       color: color-yiq($bg);
       background-color: darken($bg, 10%);
     }

_sass/bootstrap/mixins/_buttons.scss

@@ -9,7 +9,7 @@
   border-color: $border;
   @include box-shadow($btn-box-shadow);
 
-  @include hover {
+  @include hover() {
     color: color-yiq($hover-background);
     @include gradient-bg($hover-background);
     border-color: $hover-border;
@@ -17,6 +17,9 @@
 
   &:focus,
   &.focus {
+    color: color-yiq($hover-background);
+    @include gradient-bg($hover-background);
+    border-color: $hover-border;
     // Avoid using mixin so we can pass custom focus shadow properly
     @if $enable-shadows {
       box-shadow: $btn-box-shadow, 0 0 0 $btn-focus-width rgba(mix(color-yiq($background), $border, 15%), .5);
@@ -62,7 +65,7 @@
   color: $color;
   border-color: $color;
 
-  @include hover {
+  @include hover() {
     color: $color-hover;
     background-color: $active-background;
     border-color: $active-border;

_sass/bootstrap/mixins/_caret.scss

@@ -1,25 +1,25 @@
-@mixin caret-down {
+@mixin caret-down() {
   border-top: $caret-width solid;
   border-right: $caret-width solid transparent;
   border-bottom: 0;
   border-left: $caret-width solid transparent;
 }
 
-@mixin caret-up {
+@mixin caret-up() {
   border-top: 0;
   border-right: $caret-width solid transparent;
   border-bottom: $caret-width solid;
   border-left: $caret-width solid transparent;
 }
 
-@mixin caret-right {
+@mixin caret-right() {
   border-top: $caret-width solid transparent;
   border-right: 0;
   border-bottom: $caret-width solid transparent;
   border-left: $caret-width solid;
 }
 
-@mixin caret-left {
+@mixin caret-left() {
   border-top: $caret-width solid transparent;
   border-right: $caret-width solid;
   border-bottom: $caret-width solid transparent;
@@ -33,11 +33,11 @@
       vertical-align: $caret-vertical-align;
       content: "";
       @if $direction == down {
-        @include caret-down;
+        @include caret-down();
       } @else if $direction == up {
-        @include caret-up;
+        @include caret-up();
       } @else if $direction == right {
-        @include caret-right;
+        @include caret-right();
       }
     }
 
@@ -51,7 +51,7 @@
         margin-right: $caret-spacing;
         vertical-align: $caret-vertical-align;
         content: "";
-        @include caret-left;
+        @include caret-left();
       }
     }
 

_sass/bootstrap/mixins/_float.scss

@@ -1,14 +1,14 @@
 // stylelint-disable declaration-no-important
 
-@mixin float-left {
+@mixin float-left() {
   float: left !important;
   @include deprecate("The `float-left` mixin", "v4.3.0", "v5");
 }
-@mixin float-right {
+@mixin float-right() {
   float: right !important;
   @include deprecate("The `float-right` mixin", "v4.3.0", "v5");
 }
-@mixin float-none {
+@mixin float-none() {
   float: none !important;
   @include deprecate("The `float-none` mixin", "v4.3.0", "v5");
 }

_sass/bootstrap/mixins/_forms.scss

@@ -10,7 +10,7 @@
 //
 // Example usage: change the default blue border and shadow to white for better
 // contrast against a dark gray background.
-@mixin form-control-focus() {
+@mixin form-control-focus($ignore-warning: false) {
   &:focus {
     color: $input-focus-color;
     background-color: $input-focus-bg;
@@ -23,8 +23,23 @@
       box-shadow: $input-focus-box-shadow;
     }
   }
+  @include deprecate("The `form-control-focus()` mixin", "v4.4.0", "v5", $ignore-warning);
 }
 
+// This mixin uses an `if()` technique to be compatible with Dart Sass
+// See https://github.com/sass/sass/issues/1873#issuecomment-152293725 for more details
+@mixin form-validation-state-selector($state) {
+  @if ($state == "valid" or $state == "invalid") {
+    .was-validated #{if(&, "&", "")}:#{$state},
+    #{if(&, "&", "")}.is-#{$state} {
+      @content;
+    }
+  } @else {
+    #{if(&, "&", "")}.is-#{$state} {
+      @content;
+    }
+  }
+}
 
 @mixin form-validation-state($state, $color, $icon) {
   .#{$state}-feedback {
@@ -50,16 +65,22 @@
     @include border-radius($form-feedback-tooltip-border-radius);
   }
 
+  @include form-validation-state-selector($state) {
+    ~ .#{$state}-feedback,
+    ~ .#{$state}-tooltip {
+      display: block;
+    }
+  }
+
   .form-control {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       border-color: $color;
 
       @if $enable-validation-icons {
         padding-right: $input-height-inner;
-        background-image: $icon;
+        background-image: escape-svg($icon);
         background-repeat: no-repeat;
-        background-position: center right $input-height-inner-quarter;
+        background-position: right $input-height-inner-quarter center;
         background-size: $input-height-inner-half $input-height-inner-half;
       }
 
@@ -67,18 +88,12 @@
         border-color: $color;
         box-shadow: 0 0 0 $input-focus-width rgba($color, .25);
       }
-
-      ~ .#{$state}-feedback,
-      ~ .#{$state}-tooltip {
-        display: block;
-      }
     }
   }
 
   // stylelint-disable-next-line selector-no-qualifying-type
   textarea.form-control {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       @if $enable-validation-icons {
         padding-right: $input-height-inner;
         background-position: top $input-height-inner-quarter right $input-height-inner-quarter;
@@ -87,41 +102,23 @@
   }
 
   .custom-select {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       border-color: $color;
 
       @if $enable-validation-icons {
         padding-right: $custom-select-feedback-icon-padding-right;
-        background: $custom-select-background, $icon $custom-select-bg no-repeat $custom-select-feedback-icon-position / $custom-select-feedback-icon-size;
+        background: $custom-select-background, escape-svg($icon) $custom-select-bg no-repeat $custom-select-feedback-icon-position / $custom-select-feedback-icon-size;
       }
 
       &:focus {
         border-color: $color;
         box-shadow: 0 0 0 $input-focus-width rgba($color, .25);
       }
-
-      ~ .#{$state}-feedback,
-      ~ .#{$state}-tooltip {
-        display: block;
-      }
-    }
-  }
-
-
-  .form-control-file {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
-      ~ .#{$state}-feedback,
-      ~ .#{$state}-tooltip {
-        display: block;
-      }
     }
   }
 
   .form-check-input {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       ~ .form-check-label {
         color: $color;
       }
@@ -134,8 +131,7 @@
   }
 
   .custom-control-input {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       ~ .custom-control-label {
         color: $color;
 
@@ -144,11 +140,6 @@
         }
       }
 
-      ~ .#{$state}-feedback,
-      ~ .#{$state}-tooltip {
-        display: block;
-      }
-
       &:checked {
         ~ .custom-control-label::before {
           border-color: lighten($color, 10%);
@@ -170,17 +161,11 @@
 
   // custom file
   .custom-file-input {
-    .was-validated &:#{$state},
-    &.is-#{$state} {
+    @include form-validation-state-selector($state) {
       ~ .custom-file-label {
         border-color: $color;
       }
 
-      ~ .#{$state}-feedback,
-      ~ .#{$state}-tooltip {
-        display: block;
-      }
-
       &:focus {
         ~ .custom-file-label {
           border-color: $color;

_sass/bootstrap/mixins/_grid-framework.scss

@@ -33,10 +33,15 @@
         flex-grow: 1;
         max-width: 100%;
       }
+
+      @for $i from 1 through $grid-row-columns {
+        .row-cols#{$infix}-#{$i} {
+          @include row-cols($i);
+        }
+      }
+
       .col#{$infix}-auto {
-        flex: 0 0 auto;
-        width: auto;
-        max-width: 100%; // Reset earlier grid tiers
+        @include make-col-auto();
       }
 
       @for $i from 1 through $columns {

_sass/bootstrap/mixins/_grid.scss

@@ -45,7 +45,25 @@
   max-width: percentage($size / $columns);
 }
 
+@mixin make-col-auto() {
+  flex: 0 0 auto;
+  width: auto;
+  max-width: 100%; // Reset earlier grid tiers
+}
+
 @mixin make-col-offset($size, $columns: $grid-columns) {
   $num: $size / $columns;
   margin-left: if($num == 0, 0, percentage($num));
 }
+
+// Row columns
+//
+// Specify on a parent element(e.g., .row) to force immediate children into NN
+// numberof columns. Supports wrapping to new lines, but does not do a Masonry
+// style grid.
+@mixin row-cols($count) {
+  & > * {
+    flex: 0 0 100% / $count;
+    max-width: 100% / $count;
+  }
+}

_sass/bootstrap/mixins/_hover.scss

@@ -9,18 +9,18 @@
 //
 // Issue: https://github.com/twbs/bootstrap/issues/25195
 
-@mixin hover {
+@mixin hover() {
   &:hover { @content; }
 }
 
-@mixin hover-focus {
+@mixin hover-focus() {
   &:hover,
   &:focus {
     @content;
   }
 }
 
-@mixin plain-hover-focus {
+@mixin plain-hover-focus() {
   &,
   &:hover,
   &:focus {
@@ -28,7 +28,7 @@
   }
 }
 
-@mixin hover-focus-active {
+@mixin hover-focus-active() {
   &:hover,
   &:focus,
   &:active {

_sass/bootstrap/mixins/_image.scss

@@ -7,7 +7,7 @@
 //
 // Keep images from scaling beyond the width of their parents.
 
-@mixin img-fluid {
+@mixin img-fluid() {
   // Part 1: Set a maximum relative to the parent
   max-width: 100%;
   // Part 2: Override the height to auto, otherwise images will be stretched

_sass/bootstrap/mixins/_list-group.scss

@@ -6,7 +6,7 @@
     background-color: $background;
 
     &.list-group-item-action {
-      @include hover-focus {
+      @include hover-focus() {
         color: $color;
         background-color: darken($background, 5%);
       }

_sass/bootstrap/mixins/_lists.scss

@@ -1,7 +1,7 @@
 // Lists
 
 // Unstyled keeps list items block level, just removes default browser padding and list-style
-@mixin list-unstyled {
+@mixin list-unstyled() {
   padding-left: 0;
   list-style: none;
 }

_sass/bootstrap/mixins/_nav-divider.scss

@@ -2,9 +2,10 @@
 //
 // Dividers (basically an hr) within dropdowns and nav lists
 
-@mixin nav-divider($color: $nav-divider-color, $margin-y: $nav-divider-margin-y) {
+@mixin nav-divider($color: $nav-divider-color, $margin-y: $nav-divider-margin-y, $ignore-warning: false) {
   height: 0;
   margin: $margin-y 0;
   overflow: hidden;
   border-top: 1px solid $color;
+  @include deprecate("The `nav-divider()` mixin", "v4.4.0", "v5", $ignore-warning);
 }

_sass/bootstrap/mixins/_reset-text.scss

@@ -1,4 +1,4 @@
-@mixin reset-text {
+@mixin reset-text() {
   font-family: $font-family-base;
   // We deliberately do NOT reset font-size or word-wrap.
   font-style: normal;

_sass/bootstrap/mixins/_screen-reader.scss

@@ -3,11 +3,12 @@
 // See: https://a11yproject.com/posts/how-to-hide-content/
 // See: https://hugogiraudel.com/2016/10/13/css-hide-and-seek/
 
-@mixin sr-only {
+@mixin sr-only() {
   position: absolute;
   width: 1px;
   height: 1px;
   padding: 0;
+  margin: -1px; // Fix for https://github.com/twbs/bootstrap/issues/25686
   overflow: hidden;
   clip: rect(0, 0, 0, 0);
   white-space: nowrap;
@@ -20,7 +21,7 @@
 //
 // Credit: HTML5 Boilerplate
 
-@mixin sr-only-focusable {
+@mixin sr-only-focusable() {
   &:active,
   &:focus {
     position: static;

_sass/bootstrap/mixins/_table-row.scss

@@ -26,7 +26,7 @@
     $hover-background: darken($background, 5%);
 
     .table-#{$state} {
-      @include hover {
+      @include hover() {
         background-color: $hover-background;
 
         > td,

_sass/bootstrap/mixins/_text-emphasis.scss

@@ -2,15 +2,16 @@
 
 // Typography
 
-@mixin text-emphasis-variant($parent, $color) {
+@mixin text-emphasis-variant($parent, $color, $ignore-warning: false) {
   #{$parent} {
     color: $color !important;
   }
   @if $emphasized-link-hover-darken-percentage != 0 {
     a#{$parent} {
-      @include hover-focus {
+      @include hover-focus() {
         color: darken($color, $emphasized-link-hover-darken-percentage) !important;
       }
     }
   }
+  @include deprecate("`text-emphasis-variant()`", "v4.4.0", "v5", $ignore-warning);
 }