AdminLTE/build/scss/plugins/_select2.scss

//
// Plugin: Select2
//

//Signle select
// .select2-container--default,
// .select2-selection {
//   &.select2-container--focus,
//   &:focus,
//   &:active {
//     outline: none;
//   }
// }

.select2-container--default {
  .select2-selection--single {
    border: $input-border-width solid $input-border-color;
    //border-radius: $input-radius;
    padding: ($input-padding-y * 1.25) $input-padding-x;
    height: $input-height;
  }

  &.select2-container--open {
    .select2-selection--single {
      border-color: lighten($primary, 25%);
    }
  }

  & .select2-dropdown {
    border: $input-border-width solid $input-border-color;
    //border-radius: $input-radius;
  }

  & .select2-results__option {
    padding: 6px 12px;
    user-select: none;
  }

  & .select2-selection--single .select2-selection__rendered {
    padding-left: 0;
    //padding-right: 0;
    height: auto;
    margin-top: -3px;
  }

  &[dir="rtl"] .select2-selection--single .select2-selection__rendered {
    padding-right: 6px;
    padding-left: 20px;
  }

  & .select2-selection--single .select2-selection__arrow {
    height: 31px;
    right: 6px;
  }

  & .select2-selection--single .select2-selection__arrow b {
    margin-top: 0;
  }

  .select2-dropdown,
  .select2-search--inline {
    .select2-search__field {
      border: $input-border-width solid $input-border-color;

      &:focus {
        outline: none;
        border: $input-border-width solid $input-focus-border-color;
      }
    }
  }

  .select2-dropdown {
    &.select2-dropdown--below {
      border-top: 0;
    }

    &.select2-dropdown--above {
      border-bottom: 0;
    }
  }

  .select2-results__option {
    &[aria-disabled='true'] {
      color: $gray-600;
    }

    &[aria-selected='true'] {
      $color: $gray-300;

      background-color: $color;

      &,
      &:hover {
        color: color-yiq($color);
      }
    }
  }

  .select2-results__option--highlighted {
    $color: $primary;
    background-color: $color;
    color: color-yiq($color);

    &[aria-selected] {
      $color: darken($color, 3%);

      &,
      &:hover {
        background-color: $color;
        color: color-yiq($color);
      }
    }
  }

  //Multiple select
  & {
    .select2-selection--multiple {
      border: $input-border-width solid $input-border-color;
      min-height: $input-height;

      &:focus {
        border-color: $input-focus-border-color;
      }

      .select2-selection__rendered {
        padding: 0 $input-padding-x / 2 $input-padding-y;
        margin-bottom: -$input-padding-x / 2;

        li:first-child.select2-search.select2-search--inline {
          width: 100%;
          margin-left: $input-padding-x / 2;

          .select2-search__field {
            width: 100% !important;
          }
        }


        .select2-search.select2-search--inline {
          .select2-search__field {
            border: 0;
            margin-top: 6px;
          }
        }
      }

      .select2-selection__choice {
        background-color: $primary;
        border-color: darken($primary, 5%);
        color: color-yiq($primary);
        padding: 0 10px;
        margin-top: .31rem;
      }

      .select2-selection__choice__remove {
        color: rgba(255, 255, 255, 0.7);
        float: right;
        margin-left: 5px;
        margin-right: -2px;

        &:hover {
          color: $white;
        }
      }

      .text-sm &,
      &.text-sm {
        .select2-search.select2-search--inline {
          .select2-search__field {
            margin-top: 8px;
          }
        }

        .select2-selection__choice {
          margin-top: .4rem;
        }
      }
    }

    &.select2-container--focus {
      .select2-selection--single,
      .select2-selection--multiple {
        border-color: $input-focus-border-color;
      }

      .select2-search__field {
        border: 0;
      }
    }
  }

  & .select2-selection--single .select2-selection__rendered li {
    padding-right: 10px;
  }

  .input-group-prepend ~ & {
    .select2-selection {
      border-bottom-left-radius: 0;
      border-top-left-radius: 0;
    }
  }

  .input-group > &:not(:last-child) {
    .select2-selection {
      border-bottom-right-radius: 0;
      border-top-right-radius: 0;
    }
  }
}

// Select2 Bootstrap4 Theme overrides
.select2-container--bootstrap4 {
  &.select2-container--focus .select2-selection {
    box-shadow: none;
  }
}

// text-sm / form-control-sm override
select.form-control-sm ~ {
  .select2-container--default {
    font-size: $font-size-sm;
  }
}

.text-sm,
select.form-control-sm ~ {
  .select2-container--default {
    .select2-selection--single {
      height: $input-height-sm;

      .select2-selection__rendered {
        margin-top: -.4rem;
      }

      .select2-selection__arrow {
        top: -.12rem;
      }
    }

    .select2-selection--multiple {
      min-height: $input-height-sm;

      .select2-selection__rendered {
        padding: 0 $input-padding-x-sm / 2 $input-padding-y-sm;
        margin-top: -($input-padding-x-sm / 5);

        li:first-child.select2-search.select2-search--inline {
          margin-left: $input-padding-x-sm / 2;
        }

        .select2-search.select2-search--inline {
          .select2-search__field {
            margin-top: 6px;
          }
        }
      }
    }
  }
}

// Dropdown Fix inside maximized card
.maximized-card .select2-dropdown {
  z-index: 9999;
}

// Background colors (theme colors)
@each $name, $color in $theme-colors {
  @include select2-variant($name, $color);
}

// Background colors (colors)
@each $name, $color in $colors {
  @include select2-variant($name, $color);
}

.dark-mode {
  .select2-selection {
    background-color: $dark;
    border-color: $gray-600;
  }

  .select2-container--disabled .select2-selection--single {
    background-color: lighten($dark, 7.5%);
  }

  .select2-selection--single {
    background-color: $dark;
    border-color: $gray-600;

    .select2-selection__rendered {
      color: $white;
    }
  }
  .select2-dropdown .select2-search__field,
  .select2-search--inline .select2-search__field {
    background-color: $dark;
    border-color: $gray-600;
    color: white;
  }
  .select2-dropdown {
    background-color: $dark;
    border-color: $gray-600;
    color: white;
  }
  .select2-results__option[aria-selected="true"] {
    background-color: lighten($dark, 5%) !important;
    color: $gray-300;
  }
  .select2-container .select2-search--inline .select2-search__field {
    background-color: transparent;
    color: $white;
  }

  .select2-container--bootstrap4 .select2-selection--multiple .select2-selection__choice {
    color: $white;
  }
}