flaskdashboard/app/base/static/assets/scss/black-dashboard/custom/_dropdown.scss

.dropdown-menu {
    border: 0;
    box-shadow: 0px 10px 50px 0px rgba(0, 0, 0, 0.2);
    border-radius: $border-radius-xs;
    @include transitions($fast-transition-time, $transition-linear);

    &.dropdown-menu-right {
      &:before, &:after {
        left:auto;
        right: 10px;
      }
    }

    &.dropdown-black {
      background: linear-gradient(to bottom, $black 0%, $black-states 100%);
      border: 1px solid $default;
      .dropdown-item {
        color: rgba(255, 255, 255, 0.7);
      }

      .dropdown-divider {
        border-color: $default;
      }

      &:before {
        color: $black;
        z-index: 2;
      }

      &:after {
        display: inline-block;
        position: absolute;
        width: 0;
        height: 0;
        z-index: 1;
        vertical-align: middle;
        content: "";
        top: -6px;
        left: 10px;
        right: auto;
        color: $default;
        border-bottom: .4em solid;
        border-right: .4em solid transparent;
        border-left: .4em solid transparent;
      }

      &.dropdown-menu-right {
        &:after {
          left: auto;
          right: 10px;
        }
      }

      .dropup & {
        &:after {
          color: $black-states;
          z-index: 2;
        }

        &:before {
          display: inline-block;
          position: absolute;
          width: 0;
          height: 0;
          vertical-align: middle;
          content: "";
          top: auto;
          bottom: -6px;
          right: auto;
          left: 10px;
          color: $dark-background;
          border-top: .4em solid;
          border-right: .4em solid transparent;
          border-left: .4em solid transparent;
          border-bottom: none;
          z-index: 1;
        }
      }
    }

    i {
        margin-right: 5px;
        position: relative;
        top: 1px;
    }

    .tim-icons {
        margin-right: 10px;
        position: relative;
        top: 4px;
        font-size: 18px;
        margin-top: -5px;
        opacity: .5;
    }

    .dropdown-item {
        &.active,
        &:active{
            color: inherit;
        }
    }

    .dropup & {
        &:before {
            display: none;
        }

        &:after {
          display: inline-block;
          position: absolute;
          width: 0;
          height: 0;
          vertical-align: middle;
          content: "";
          top: auto;
          bottom: -5px;
          right: auto;
          left: 10px;
          color: $white;
          border-top: .4em solid;
          border-right: .4em solid transparent;
          border-left: .4em solid transparent;
          border-bottom: none;
        }

        &.dropdown-menu-right {
          &:after, &:before {
            right: 10px;
            left: auto;
          }
        }
    }



    &:before {
      display: inline-block;
      position: absolute;
      width: 0;
      height: 0;
      vertical-align: middle;
      content: "";
      top: -5px;
      left: 10px;
      right: auto;
      color: $white;
      border-bottom: .4em solid;
      border-right: .4em solid transparent;
      border-left: .4em solid transparent;
    }



    &.dropdown-menu-right {
      right: 0 !important;
      left: auto !important;
    }

    .dropdown-item,
    .bootstrap-select &.inner li a {
      font-size: $font-size-sm;
      padding-top: .6rem;
      padding-bottom: .6rem;
      margin-top: 5px;
      @include transitions($fast-transition-time, $transition-linear);

      &:hover,
      &:focus {
        background-color: $opacity-gray-3;
      }

      &.disabled,
      &:disabled {
        color: $default-opacity;

        &:hover,
        &:focus {
          background-color: transparent;
          box-shadow: none;
        }
      }
    }


    .dropdown-divider {
        background-color: $opacity-gray-5;
    }

    .dropdown-header:not([href]):not([tabindex]) {
        color: $default-opacity;
        font-size: $font-size-xs;
        text-transform: uppercase;
        font-weight: $font-weight-bold;
    }

    &.dropdown-primary {
        @include dropdown-colors(darken($primary, 3%),$opacity-8,$white, $opacity-2);
    }

    &.dropdown-info {
        @include dropdown-colors(darken($info, 3%),$opacity-8,$white, $opacity-2);
    }

    &.dropdown-danger {
        @include dropdown-colors(darken($danger, 3%),$opacity-8,$white, $opacity-2);
    }

    &.dropdown-success {
        @include dropdown-colors(darken($success, 3%),$opacity-8,$white, $opacity-2);
    }

    &.dropdown-warning {
        @include dropdown-colors(darken($warning, 3%),$opacity-8,$white, $opacity-2);
    }

    .dropdown &,
    .dropup:not(.bootstrap-select) &,
    .bootstrap-select &:not(.inner),
    &.bootstrap-datetimepicker-widget.bottom {
        @include transform-translate-y-dropdown(-20px);
        visibility: hidden;
        display: block;
        @include opacity(0);
        top: 100% !important;
    }

    &.bootstrap-datetimepicker-widget.top {
      @include transform-translate-y-dropdown(-20px);
      visibility: hidden;
      display: block;
      @include opacity(0);
    }

    &.bootstrap-datetimepicker-widget.top,
    &.bootstrap-datetimepicker-widget.bottom {
        @include transform-translate-y-dropdown(-20px);
    }

    .bootstrap-select.dropup &:not(.inner){
        @include transform-translate-y-dropdown(25px);
    }

    .dropup:not(.bootstrap-select) &{
        @include transform-translate-y-dropdown(20px);
        top: auto !important;
        bottom: 100%;
    }

    .dropdown.show &,
    .bootstrap-select.show &:not(.inner),
    &.bootstrap-datetimepicker-widget.top.open,
    &.bootstrap-datetimepicker-widget.bottom.open,
    .dropup.show:not(.bootstrap-select) &,
    .navbar .dropdown.show &{
        @include opacity(1);
        visibility: visible;
        @include transform-translate-y-dropdown(1px);
    }

    &.bootstrap-datetimepicker-widget.top.open,
    &.bootstrap-datetimepicker-widget.bottom.open{
        @include transform-translate-y-dropdown(0px);
    }

    .dropup.show:not(.bootstrap-select) &{
        @include transform-translate-y-dropdown(-2px);
    }

    &.dropdown-navbar{
      left: -80px;
      &:before, &:after{
        left: auto;
        right: 17px;
      }
    }


}

.btn{
    cursor: pointer;

    &.dropdown-toggle[data-toggle="dropdown"]{
        padding:10px;
        margin: 0;
        margin-bottom: 5px;

        &:after{
          content: "";
          margin-left: 5px;
        }

    }

    span.bs-caret{
      display: none;
    }

    &.btn-link{
      &.dropdown-toggle{
        height: 22px;
        padding: 0;
        margin-right: 5px;
      }
    }
}

.dropdown-toggle:after{

  content: unset;

}

.btn:not(:disabled):not(.disabled).active:focus,
 .btn:not(:disabled):not(.disabled):active:focus,
 .show>.btn.dropdown-toggle:focus{
   box-shadow: none;
 }


// Dropown: Sizes

.dropdown-menu-sm {
    min-width: 100px;
    border: $border-radius-lg;
}

.dropdown-menu-lg {
    min-width: 260px;
    border-radius: $border-radius-lg;
}

.dropdown-menu-xl {
    min-width: 450px;
    border-radius: $border-radius-lg;
}

@media screen and (max-width: 991px){
  .dropdown-toggle:after{
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: .255em;
    vertical-align: .255em;
    content: "";
    border-top: .3em solid;
    border-right: .3em solid transparent;
    border-bottom: 0;
    border-left: .3em solid transparent;
  }

}


@media screen and (min-width: 992px){
  .dropdown-menu .dropdown-item{
      color: $dark-gray;
  }
}