bootstrap/scss/_navbar.scss

@use "sass:map";
@use "config" as *;
@use "variables" as *;
@use "mixins/border-radius" as *;
@use "mixins/box-shadow" as *;
@use "mixins/gradients" as *;
@use "mixins/transition" as *;
@use "mixins/color-mode" as *;
@use "mixins/deprecate" as *;
@use "vendor/rfs" as *;
@use "layout/breakpoints" as *;

// Navbar
//
// Provide a static navbar from which we expand to create full-width, fixed, and
// other navbar variations.

@layer components {
  .navbar {
    // scss-docs-start navbar-css-vars
    --#{$prefix}navbar-padding-x: #{if($navbar-padding-x == null, 0, $navbar-padding-x)};
    --#{$prefix}navbar-padding-y: #{$navbar-padding-y};
    --#{$prefix}navbar-color: #{$navbar-light-color};
    --#{$prefix}navbar-hover-color: #{$navbar-light-hover-color};
    --#{$prefix}navbar-disabled-color: #{$navbar-light-disabled-color};
    --#{$prefix}navbar-active-color: #{$navbar-light-active-color};
    --#{$prefix}navbar-brand-padding-y: #{$navbar-brand-padding-y};
    --#{$prefix}navbar-brand-margin-end: #{$navbar-brand-margin-end};
    --#{$prefix}navbar-brand-font-size: #{$navbar-brand-font-size};
    --#{$prefix}navbar-brand-color: #{$navbar-light-brand-color};
    --#{$prefix}navbar-brand-hover-color: #{$navbar-light-brand-hover-color};
    --#{$prefix}navbar-nav-link-padding-x: #{$navbar-nav-link-padding-x};
    --#{$prefix}navbar-toggler-padding-y: #{$navbar-toggler-padding-y};
    --#{$prefix}navbar-toggler-padding-x: #{$navbar-toggler-padding-x};
    --#{$prefix}navbar-toggler-font-size: #{$navbar-toggler-font-size};
    --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-light-toggler-icon-bg)};
    --#{$prefix}navbar-toggler-border-color: #{$navbar-light-toggler-border-color};
    --#{$prefix}navbar-toggler-border-radius: #{$navbar-toggler-border-radius};
    --#{$prefix}navbar-toggler-focus-width: #{$navbar-toggler-focus-width};
    --#{$prefix}navbar-toggler-transition: #{$navbar-toggler-transition};
    // scss-docs-end navbar-css-vars

    position: relative;
    display: flex;
    flex-wrap: wrap; // allow us to do the line break for collapsing content
    align-items: center;
    justify-content: space-between; // space out brand from logo
    padding: var(--#{$prefix}navbar-padding-y) var(--#{$prefix}navbar-padding-x);
    @include gradient-bg();

    // Because flex properties aren't inherited, we need to redeclare these first
    // few properties so that content nested within behave properly.
    // The `flex-wrap` property is inherited to simplify the expanded navbars
    %container-flex-properties {
      display: flex;
      flex-wrap: inherit;
      align-items: center;
      justify-content: space-between;
    }

    > .container,
    > .container-fluid {
      @extend %container-flex-properties;
    }

    @each $breakpoint, $container-max-width in $container-max-widths {
      > .container#{breakpoint-infix($breakpoint, $container-max-widths)} {
        @extend %container-flex-properties;
      }
    }
  }


  // Navbar brand
  //
  // Used for brand, project, or site names.

  .navbar-brand {
    padding-top: var(--#{$prefix}navbar-brand-padding-y);
    padding-bottom: var(--#{$prefix}navbar-brand-padding-y);
    margin-right: var(--#{$prefix}navbar-brand-margin-end);
    @include font-size(var(--#{$prefix}navbar-brand-font-size));
    color: var(--#{$prefix}navbar-brand-color);
    text-decoration: if($link-decoration == none, null, none);
    white-space: nowrap;

    &:hover,
    &:focus {
      color: var(--#{$prefix}navbar-brand-hover-color);
      text-decoration: if($link-hover-decoration == underline, none, null);
    }
  }


  // Navbar nav
  //
  // Custom navbar navigation (doesn't require `.nav`, but does make use of `.nav-link`).

  .navbar-nav {
    // scss-docs-start navbar-nav-css-vars
    --#{$prefix}nav-link-padding-x: 0;
    --#{$prefix}nav-link-padding-y: #{$nav-link-padding-y};
    @include rfs($nav-link-font-size, --#{$prefix}nav-link-font-size);
    --#{$prefix}nav-link-font-weight: #{$nav-link-font-weight};
    --#{$prefix}nav-link-color: var(--#{$prefix}navbar-color);
    --#{$prefix}nav-link-hover-color: var(--#{$prefix}navbar-hover-color);
    --#{$prefix}nav-link-disabled-color: var(--#{$prefix}navbar-disabled-color);
    // scss-docs-end navbar-nav-css-vars

    display: flex;
    flex-direction: column; // cannot use `inherit` to get the `.navbar`s value
    padding-left: 0;
    margin-bottom: 0;
    list-style: none;

    .nav-link {
      &.active,
      &.show {
        color: var(--#{$prefix}navbar-active-color);
      }
    }

    .dropdown-menu {
      position: static;
    }
  }


  // Navbar text
  //
  //

  .navbar-text {
    padding-top: $nav-link-padding-y;
    padding-bottom: $nav-link-padding-y;
    color: var(--#{$prefix}navbar-color);

    a,
    a:hover,
    a:focus  {
      color: var(--#{$prefix}navbar-active-color);
    }
  }


  // Responsive navbar
  //
  // Custom styles for responsive collapsing and toggling of navbar contents.
  // Powered by the collapse Bootstrap JavaScript plugin.

  // When collapsed, prevent the toggleable navbar contents from appearing in
  // the default flexbox row orientation. Requires the use of `flex-wrap: wrap`
  // on the `.navbar` parent.
  .navbar-collapse {
    flex-grow: 1;
    flex-basis: 100%;
    // For always expanded or extra full navbars, ensure content aligns itself
    // properly vertically. Can be easily overridden with flex utilities.
    align-items: center;
  }

  // Button for toggling the navbar when in its collapsed state
  .navbar-toggler {
    padding: var(--#{$prefix}navbar-toggler-padding-y) var(--#{$prefix}navbar-toggler-padding-x);
    @include font-size(var(--#{$prefix}navbar-toggler-font-size));
    line-height: 1;
    color: var(--#{$prefix}navbar-color);
    background-color: transparent; // remove default button style
    border: var(--#{$prefix}border-width) solid var(--#{$prefix}navbar-toggler-border-color); // remove default button style
    @include border-radius(var(--#{$prefix}navbar-toggler-border-radius));
    @include transition(var(--#{$prefix}navbar-toggler-transition));

    &:hover {
      text-decoration: none;
    }

    &:focus {
      text-decoration: none;
      outline: 0;
      box-shadow: 0 0 0 var(--#{$prefix}navbar-toggler-focus-width);
    }
  }

  // Keep as a separate element so folks can easily override it with another icon
  // or image file as needed.
  .navbar-toggler-icon {
    display: inline-block;
    width: 1.5em;
    height: 1.5em;
    vertical-align: middle;
    background-image: var(--#{$prefix}navbar-toggler-icon-bg);
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100%;
  }

  .navbar-nav-scroll {
    max-height: var(--#{$prefix}scroll-height, 75vh);
    overflow-y: auto;
  }

  // scss-docs-start navbar-expand-loop
  // Generate series of `.navbar-expand-*` responsive classes for configuring
  // where your navbar collapses.
  .navbar-expand {
    @each $breakpoint in map.keys($grid-breakpoints) {
      $next: breakpoint-next($breakpoint, $grid-breakpoints);
      $infix: breakpoint-infix($next, $grid-breakpoints);

      // stylelint-disable-next-line scss/selector-no-union-class-name
      &#{$infix} {
        @include media-breakpoint-up($next) {
          flex-wrap: nowrap;
          justify-content: flex-start;

          .navbar-nav {
            flex-direction: row;

            .dropdown-menu {
              position: absolute;
            }

            .nav-link {
              padding-right: var(--#{$prefix}navbar-nav-link-padding-x);
              padding-left: var(--#{$prefix}navbar-nav-link-padding-x);
            }
          }

          .navbar-nav-scroll {
            overflow: visible;
          }

          .navbar-collapse {
            display: flex !important; // stylelint-disable-line declaration-no-important
            flex-basis: auto;
          }

          .navbar-toggler {
            display: none;
          }

          .offcanvas {
            // stylelint-disable declaration-no-important
            position: static;
            z-index: auto;
            flex-grow: 1;
            width: auto !important;
            height: auto !important;
            visibility: visible !important;
            background-color: transparent !important;
            border: 0 !important;
            transform: none !important;
            @include box-shadow(none);
            @include transition(none);
            // stylelint-enable declaration-no-important

            .offcanvas-header {
              display: none;
            }

            .offcanvas-body {
              display: flex;
              flex-grow: 0;
              padding: 0;
              overflow-y: visible;
            }
          }
        }
      }
    }
  }
  // scss-docs-end navbar-expand-loop

  // Navbar themes
  //
  // Styles for switching between navbars with light or dark background.

  .navbar-light {
    @include deprecate("`.navbar-light`", "v5.2.0", "v6.0.0", true);
  }

  .navbar-dark,
  .navbar[data-bs-theme="dark"] {
    // scss-docs-start navbar-dark-css-vars
    --#{$prefix}navbar-color: #{$navbar-dark-color};
    --#{$prefix}navbar-hover-color: #{$navbar-dark-hover-color};
    --#{$prefix}navbar-disabled-color: #{$navbar-dark-disabled-color};
    --#{$prefix}navbar-active-color: #{$navbar-dark-active-color};
    --#{$prefix}navbar-brand-color: #{$navbar-dark-brand-color};
    --#{$prefix}navbar-brand-hover-color: #{$navbar-dark-brand-hover-color};
    --#{$prefix}navbar-toggler-border-color: #{$navbar-dark-toggler-border-color};
    --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-dark-toggler-icon-bg)};
    // scss-docs-end navbar-dark-css-vars
  }

  @if $enable-dark-mode {
    @include color-mode(dark) {
      .navbar-toggler-icon {
        --#{$prefix}navbar-toggler-icon-bg: #{escape-svg($navbar-dark-toggler-icon-bg)};
      }
    }
  }
}