bootstrap/scss/buttons/_close.scss

@use "../config" as *;
@use "../colors" as *;
@use "../variables" as *;
@use "../mixins/border-radius" as *;
@use "../mixins/color-mode" as *;

// scss-docs-start close-variables
$btn-close-width:            1em !default;
$btn-close-height:           $btn-close-width !default;
$btn-close-padding-x:        .25em !default;
$btn-close-padding-y:        $btn-close-padding-x !default;
$btn-close-color:            $black !default;
$btn-close-bg:               url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$btn-close-color}'><path d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414'/></svg>") !default;
$btn-close-focus-shadow:     $focus-ring-box-shadow !default;
$btn-close-opacity:          .5 !default;
$btn-close-hover-opacity:    .75 !default;
$btn-close-focus-opacity:    1 !default;
$btn-close-disabled-opacity: .25 !default;
$btn-close-filter:           null !default;
$btn-close-filter-dark: invert(1) grayscale(100%) brightness(200%) !default;
// scss-docs-end close-variables

// Transparent background and border properties included for button version.
// iOS requires the button element instead of an anchor tag.
// If you want the anchor version, it requires `href="#"`.
// See https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile

@layer components {
  .btn-close {
    // scss-docs-start close-css-vars
    --#{$prefix}btn-close-color: #{$btn-close-color};
    --#{$prefix}btn-close-bg: #{ escape-svg($btn-close-bg) };
    --#{$prefix}btn-close-opacity: #{$btn-close-opacity};
    --#{$prefix}btn-close-hover-opacity: #{$btn-close-hover-opacity};
    --#{$prefix}btn-close-focus-shadow: #{$btn-close-focus-shadow};
    --#{$prefix}btn-close-focus-opacity: #{$btn-close-focus-opacity};
    --#{$prefix}btn-close-disabled-opacity: #{$btn-close-disabled-opacity};
    // scss-docs-end close-css-vars

    box-sizing: content-box;
    width: $btn-close-width;
    height: $btn-close-height;
    padding: $btn-close-padding-y $btn-close-padding-x;
    color: var(--#{$prefix}btn-close-color);
    background: transparent var(--#{$prefix}btn-close-bg) center / $btn-close-width auto no-repeat; // include transparent for button elements
    filter: var(--#{$prefix}btn-close-filter);
    border: 0; // for button elements
    @include border-radius();
    opacity: var(--#{$prefix}btn-close-opacity);

    // Override <a>'s hover style
    &:hover {
      color: var(--#{$prefix}btn-close-color);
      text-decoration: none;
      opacity: var(--#{$prefix}btn-close-hover-opacity);
    }

    &:focus {
      outline: 0;
      box-shadow: var(--#{$prefix}btn-close-focus-shadow);
      opacity: var(--#{$prefix}btn-close-focus-opacity);
    }

    &:disabled,
    &.disabled {
      pointer-events: none;
      user-select: none;
      opacity: var(--#{$prefix}btn-close-disabled-opacity);
    }
  }

  @mixin btn-close-white() {
    --#{$prefix}btn-close-filter: #{$btn-close-filter-dark};
  }

  .btn-close-white {
    @include btn-close-white();
  }

  :root,
  [data-bs-theme="light"] {
    --#{$prefix}btn-close-filter: #{$btn-close-filter};
  }

  @if $enable-dark-mode {
    @include color-mode(dark, true) {
      @include btn-close-white();
    }
  }
}