_rtl.scss

.rtl,
[dir="rtl"] {
  text-align: right;
  direction: rtl;

  .nav {
    padding-right: 0;
  }

  .navbar-nav .nav-item {
    float: right;
  }

  .navbar-nav .nav-item + .nav-item {
    margin-right: 1rem;
    margin-left: inherit;
  }

  th {
    text-align: right;
  }

  .alert-dismissible {
    padding-right: 1.25rem;
    padding-left: 4rem;
  }

  .dropdown-menu {
    right: 0;
    left: inherit;
    text-align: right;
  }

  .checkbox label {
    padding-right: 1.25rem;
    padding-left: inherit;
  }

  .btn-group > .btn:first-child:not(:last-child):not(.dropdown-toggle) {
    border-radius: 0 $border-radius $border-radius 0;
  }

  .btn-group > .btn:last-child:not(:first-child),
  .btn-group > .dropdown-toggle:not(:first-child) {
    border-radius: $border-radius 0 0 $border-radius;
  }

  .btn-group > .btn-group:last-child:not(:first-child) > .btn:first-child{
    border-radius: $border-radius 0 0 $border-radius;
  }

  .custom-control-label::after,
  .custom-control-label::before {
    right: 0;
    left: inherit;
  }

  .custom-select {
    padding: $custom-select-padding-y $custom-select-padding-x $custom-select-padding-y ($custom-select-padding-x + $custom-select-indicator-padding);
    background: $custom-select-bg $custom-select-indicator no-repeat left $custom-select-padding-x center;
    background-size: $custom-select-bg-size;
  }

  .input-group > .input-group-append:last-child > .btn:not(:last-child):not(.dropdown-toggle),
  .input-group > .input-group-append:last-child > .input-group-text:not(:last-child),
  .input-group > .input-group-append:not(:last-child) > .btn,
  .input-group > .input-group-append:not(:last-child) > .input-group-text,
  .input-group > .input-group-prepend > .btn,
  .input-group > .input-group-prepend > .input-group-text{
    border-radius: 0 $border-radius $border-radius 0;
  }

  .input-group > .input-group-append > .btn,
  .input-group > .input-group-append > .input-group-text,
  .input-group > .input-group-prepend:first-child > .btn:not(:first-child),
  .input-group > .input-group-prepend:first-child > .input-group-text:not(:first-child),
  .input-group > .input-group-prepend:not(:first-child) > .btn,
  .input-group > .input-group-prepend:not(:first-child) > .input-group-text {
    border-radius: $border-radius 0 0 $border-radius;
  }

  .input-group > .custom-select:not(:first-child),
  .input-group > .form-control:not(:first-child) {
    border-radius: $border-radius 0 0 $border-radius;
  }

  .input-group > .custom-select:not(:last-child),
  .input-group > .form-control:not(:last-child) {
    border-radius: 0 $border-radius $border-radius 0;
  }

  .input-group > .custom-select:not(:last-child):not(:first-child),
  .input-group > .form-control:not(:last-child):not(:first-child) {
    border-radius: 0;
  }

  .custom-control {
    padding-right: 1.5rem;
    padding-left: inherit;
    margin-right: inherit;
    margin-left: 1rem;
  }
  .custom-control-indicator {
    right: 0;
    left: inherit;
  }

  .custom-file-label::after {
    right: initial;
    left: -1px;
    border-radius: .25rem 0 0 .25rem;
  }

  .radio input,
  .radio-inline,
  .checkbox input,
  .checkbox-inline input {
    margin-right: -1.25rem;
    margin-left: inherit;
  }

  .list-group {
    padding-right: 0;
    padding-left: 40px;
  }

  .close {
    float: left;
  }

  .modal-header .close {
    margin: -15px auto -15px -15px;
  }

  .modal-footer > :not(:first-child) {
    margin-right: .25rem;
  }

  .alert-dismissible .close {
    right: inherit;
    left: 0;
  }

  .dropdown-toggle::after {
    margin-right: .255em;
    margin-left: 0;
  }

  .form-check-input {
    margin-right: -1.25rem;
    margin-left: inherit;
  }

  .form-check-label {
    padding-right: 1.25rem;
    padding-left: inherit;
  }

  .pagination,
  .list-unstyled,
  .list-inline {
    padding-left: inherit;
    padding-right: 0;
  }

  @mixin make-col-offset($size, $columns: $grid-columns) {
    $num: $size / $columns;
    margin-right: if($num == 0, 0, percentage($num));
    margin-left: 0;
  }

  @mixin make-grid-columns($columns: $grid-columns, $gutter: $grid-gutter-width, $breakpoints: $grid-breakpoints) {
    @each $breakpoint in map-keys($breakpoints) {
      $infix: breakpoint-infix($breakpoint, $breakpoints);
      @include media-breakpoint-up($breakpoint, $breakpoints) {
        @for $i from 0 through ($columns - 1) {
          @if not ($infix == "" and $i == 0) {
            .offset#{$infix}-#{$i} {
              @include make-col-offset($i, $columns);
            }
          }
        }
      }
    }
  }
  @if $enable-grid-classes {
    @include make-grid-columns();
  }

  // stylelint-disable declaration-no-important
  @each $breakpoint in map-keys($grid-breakpoints) {
    @include media-breakpoint-up($breakpoint) {
      $infix: breakpoint-infix($breakpoint, $grid-breakpoints);

      @each $prop, $abbrev in (margin: m, padding: p) {
        @each $size, $length in $spacers {

          .#{$abbrev}r#{$infix}-#{$size} {
            #{$prop}-right: 0 !important;
            #{$prop}-left: $length !important;
          }
          .#{$abbrev}l#{$infix}-#{$size} {
            #{$prop}-left: 0 !important;
            #{$prop}-right: $length !important;
          }
          #{$abbrev}x#{$infix}-#{$size} {
            #{$prop}-left: $length !important;
            #{$prop}-right: $length !important;
          }
        }
      }

      .mr#{$infix}-auto{
        margin-right: 0 !important;
        margin-left: auto !important;
      }
      .ml#{$infix}-auto{
        margin-right: auto !important;
        margin-left: 0 !important;
      }
      .mx#{$infix}-auto{
        margin-right: auto !important;
        margin-left: auto !important;
      }
    }
  }

  @each $breakpoint in map-keys($grid-breakpoints) {
    @include media-breakpoint-up($breakpoint) {
      $infix: breakpoint-infix($breakpoint, $grid-breakpoints);
      .text#{$infix}-right   { text-align: left !important; }
      .text#{$infix}-left  { text-align: right !important; }
    }
  }
}