element/packages/theme-chalk/src/popover.scss

@import "mixins/mixins";
@import "common/var";

@include b(popover) {
  position: absolute;
  background: $--popover-fill;
  min-width: 150px;
  border-radius: 2px;
  border: 1px solid $--popover-border-color;
  padding: $--popover-padding;
  z-index: $--index-popper;
  font-size: $--popover-font-size;
  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, .12),
              0 0 6px 0 rgba(0, 0, 0, .04);

  .popper__arrow,
  .popper__arrow::after {
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
  }

  .popper__arrow {
    border-width: $--popover-arrow-size;
  }

  .popper__arrow::after {
    content: " ";
    border-width: $--popover-arrow-size;
  }

  &[x-placement^="top"] {
    margin-bottom: #{$--popover-arrow-size + 6};
  }

  &[x-placement^="top"] .popper__arrow {
    bottom: -$--popover-arrow-size;
    left: 50%;
    margin-right: #{$--tooltip-arrow-size / 2};
    border-top-color: $--popover-border-color;
    border-bottom-width: 0;

    &::after {
      bottom: 1px;
      margin-left: -$--popover-arrow-size;
      border-top-color: $--popover-fill;
      border-bottom-width: 0;
    }
  }

  &[x-placement^="bottom"] {
    margin-top: #{$--popover-arrow-size + 6};
  }

  &[x-placement^="bottom"] .popper__arrow {
    top: -$--popover-arrow-size;
    left: 50%;
    margin-right: #{$--tooltip-arrow-size / 2};
    border-top-width: 0;
    border-bottom-color: $--popover-border-color;

    &::after {
      top: 1px;
      margin-left: -$--popover-arrow-size;
      border-top-width: 0;
      border-bottom-color: $--popover-fill;
    }
  }

  &[x-placement^="right"] {
    margin-left: #{$--popover-arrow-size + 6};
  }

  &[x-placement^="right"] .popper__arrow {
    top: 50%;
    left: -$--popover-arrow-size;
    margin-bottom: #{$--tooltip-arrow-size / 2};
    border-right-color: $--popover-border-color;
    border-left-width: 0;

    &::after {
      bottom: -$--popover-arrow-size;
      left: 1px;
      border-right-color: $--popover-fill;
      border-left-width: 0;
    }
  }

  &[x-placement^="left"] {
    margin-right: #{$--popover-arrow-size + 6};
  }

  &[x-placement^="left"] .popper__arrow {
    top: 50%;
    right: -$--popover-arrow-size;
    margin-bottom: #{$--tooltip-arrow-size / 2};
    border-right-width: 0;
    border-left-color: $--popover-border-color;

    &::after {
      right: 1px;
      bottom: -$--popover-arrow-size;
      margin-left: -$--popover-arrow-size;
      border-right-width: 0;
      border-left-color: $--popover-fill;
    }
  }

  @include e(title) {
    color: $--popover-title-color;
    font-size: $--popover-title-font-size;
    line-height: 1;
    margin-bottom: 9px;
  }
}