bootstrap/scss/_popover.scss

// stylelint-disable custom-property-empty-line-before

.popover {
  // scss-docs-start popover-css-vars
  // --#{$variable-prefix}popover-zindex: #{$zindex-popover};
  // --#{$variable-prefix}popover-max-width: #{$popover-max-width};
  @include rfs($popover-font-size, --#{$variable-prefix}popover-font-size);
  --#{$variable-prefix}popover-bg: #{$popover-bg};
  --#{$variable-prefix}popover-border-width: #{$popover-border-width};
  --#{$variable-prefix}popover-border-color: #{$popover-border-color};
  // --#{$variable-prefix}popover-border-radius: #{$popover-border-radius};
  // --#{$variable-prefix}popover-box-shadow: #{$popover-box-shadow}; // Unused?
  // --#{$variable-prefix}popover-header-padding: #{$popover-header-padding-y $popover-header-padding-x};
  // --#{$variable-prefix}popover-header-color: #{$popover-header-color};
  --#{$variable-prefix}popover-header-bg: #{$popover-header-bg};
  // --#{$variable-prefix}popover-body-padding: #{$popover-body-padding-y $popover-body-padding-x};
  // --#{$variable-prefix}popover-body-color: #{$popover-body-color};
  --#{$variable-prefix}popover-arrow-width: #{$popover-arrow-width};
  --#{$variable-prefix}popover-arrow-height: #{$popover-arrow-height};
  --#{$variable-prefix}popover-arrow-border: var(--#{$variable-prefix}popover-border-color);
  // scss-docs-end popover-css-vars

  position: absolute;
  top: 0;
  left: 0 #{"/* rtl:ignore */"};
  z-index: var(--#{$variable-prefix}popover-zindex, #{$zindex-popover});
  display: block;
  max-width: var(--#{$variable-prefix}popover-max-width, #{$popover-max-width});
  // Our parent element can be arbitrary since tooltips are by default inserted as a sibling of their target element.
  // So reset our font and text properties to avoid inheriting weird values.
  @include reset-text();
  font-size: var(--#{$variable-prefix}popover-font-size);
  // Allow breaking very long words so they don't overflow the popover's bounds
  word-wrap: break-word;
  background-color: var(--#{$variable-prefix}popover-bg);
  background-clip: padding-box;
  border: var(--#{$variable-prefix}popover-border-width) solid var(--#{$variable-prefix}popover-border-color);
  // border-radius: var(--#{$variable-prefix}popover-border-radius, #{$popover-border-radius});
  @include border-radius(var(--#{$variable-prefix}popover-border-radius, #{$popover-border-radius}));
  @include box-shadow(var(--#{$variable-prefix}popover-bg));

  .popover-arrow {
    position: absolute;
    display: block;
    width: var(--#{$variable-prefix}popover-arrow-width);
    height: var(--#{$variable-prefix}popover-arrow-height);

    &::before,
    &::after {
      position: absolute;
      display: block;
      content: "";
      border-color: transparent;
      border-style: solid;
      border-width: 0;
    }
  }
}


.bs-popover-top {
  > .popover-arrow {
    bottom: calc((var(--#{$variable-prefix}popover-arrow-height)) * -1); // stylelint-disable-line function-disallowed-list

    &::before {
      bottom: 0;
      border-top-color: var(--#{$variable-prefix}popover-arrow-border);
      border-top-width: var(--#{$variable-prefix}popover-arrow-height);
      border-inline-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }

    &::after {
      bottom: var(--#{$variable-prefix}popover-border-width);
      border-top-color: var(--#{$variable-prefix}popover-bg);
      border-top-width: var(--#{$variable-prefix}popover-arrow-height);
      border-inline-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }
  }
}

.bs-popover-end {
  > .popover-arrow {
    left: calc((var(--#{$variable-prefix}popover-arrow-height)) * -1); // stylelint-disable-line function-disallowed-list
    width: var(--#{$variable-prefix}popover-arrow-height);
    height: var(--#{$variable-prefix}popover-arrow-width);

    &::before {
      left: 0;
      border-right-color: var(--#{$variable-prefix}popover-arrow-border);
      border-right-width: var(--#{$variable-prefix}popover-arrow-height);
      border-block-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }

    &::after {
      left: var(--#{$variable-prefix}popover-border-width);
      border-right-color: var(--#{$variable-prefix}popover-bg);
      border-right-width: var(--#{$variable-prefix}popover-arrow-height);
      border-block-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }
  }
}

.bs-popover-bottom {
  > .popover-arrow {
    top: calc((var(--#{$variable-prefix}popover-arrow-height)) * -1); // stylelint-disable-line function-disallowed-list

    &::before {
      top: 0;
      border-bottom-color: var(--#{$variable-prefix}popover-arrow-border);
      border-bottom-width: var(--#{$variable-prefix}popover-arrow-height);
      border-inline-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }

    &::after {
      top: var(--#{$variable-prefix}popover-border-width);
      border-bottom-color: var(--#{$variable-prefix}popover-bg);
      border-bottom-width: var(--#{$variable-prefix}popover-arrow-height);
      border-inline-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }
  }

  // This will remove the popover-header's border just below the arrow
  .popover-header::before {
    position: absolute;
    top: 0;
    left: 50%;
    display: block;
    width: var(--#{$variable-prefix}popover-arrow-width);
    margin-left: calc(var(--#{$variable-prefix}popover-arrow-width) * -.5); // stylelint-disable-line function-disallowed-list
    content: "";
    border-bottom: var(--#{$variable-prefix}popover-border-width) solid var(--#{$variable-prefix}popover-header-bg);
  }
}

.bs-popover-start {
  > .popover-arrow {
    right: calc((var(--#{$variable-prefix}popover-arrow-height)) * -1); // stylelint-disable-line function-disallowed-list
    width: var(--#{$variable-prefix}popover-arrow-height);
    height: var(--#{$variable-prefix}popover-arrow-width);

    &::before {
      right: 0;
      border-left-color: var(--#{$variable-prefix}popover-arrow-border);
      border-left-width: var(--#{$variable-prefix}popover-arrow-height);
      border-block-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }

    &::after {
      right: var(--#{$variable-prefix}popover-border-width);
      border-left-color: var(--#{$variable-prefix}popover-bg);
      border-left-width: var(--#{$variable-prefix}popover-arrow-height);
      border-block-width: calc(var(--#{$variable-prefix}popover-arrow-width) * .5); // stylelint-disable-line function-disallowed-list
    }
  }
}

.bs-popover-auto {
  &[data-popper-placement^="top"] {
    @extend .bs-popover-top;
  }
  &[data-popper-placement^="right"] {
    @extend .bs-popover-end;
  }
  &[data-popper-placement^="bottom"] {
    @extend .bs-popover-bottom;
  }
  &[data-popper-placement^="left"] {
    @extend .bs-popover-start;
  }
}

// Offset the popover to account for the popover arrow
.popover-header {
  padding: var(--#{$variable-prefix}popover-header-padding, #{$popover-header-padding-y $popover-header-padding-x});
  margin-bottom: 0; // Reset the default from Reboot
  @include font-size($font-size-base);
  color: var(--#{$variable-prefix}popover-header-color), #{$popover-header-color};
  background-color: var(--#{$variable-prefix}popover-header-bg);
  border-bottom: var(--#{$variable-prefix}popover-border-width) solid var(--#{$variable-prefix}popover-border-color);
  @include border-top-radius($popover-inner-border-radius);

  &:empty {
    display: none;
  }
}

.popover-body {
  padding: var(--#{$variable-prefix}popover-body-padding, #{$popover-body-padding-y $popover-body-padding-x});
  color: var(--#{$variable-prefix}popover-body-color, #{$popover-body-color});
}