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// The dropdown wrapper (`<div>`)
.dropup,
.dropright,
.dropdown,
.dropleft {
position: relative;
}
.dropdown-toggle {
white-space: nowrap;
// Generate the caret automatically
@include caret;
}
// The dropdown menu
.dropdown-menu {
position: absolute;
top: 100%;
left: 0;
z-index: $zindex-dropdown;
display: none; // none by default, but block on "open" of the menu
float: left;
min-width: $dropdown-min-width;
padding: $dropdown-padding-y 0;
margin: $dropdown-spacer 0 0; // override default ul
@include font-size($dropdown-font-size);
color: $dropdown-color;
text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
list-style: none;
background-color: $dropdown-bg;
background-clip: padding-box;
border: $dropdown-border-width solid $dropdown-border-color;
@include border-radius($dropdown-border-radius);
@include box-shadow($dropdown-box-shadow);
}
@each $breakpoint in map-keys($grid-breakpoints) {
@include media-breakpoint-up($breakpoint) {
$infix: breakpoint-infix($breakpoint, $grid-breakpoints);
.dropdown-menu#{$infix}-left {
right: auto;
left: 0;
}
.dropdown-menu#{$infix}-right {
right: 0;
left: auto;
}
}
}
// Allow for dropdowns to go bottom up (aka, dropup-menu)
// Just add .dropup after the standard .dropdown class and you're set.
.dropup {
.dropdown-menu {
top: auto;
bottom: 100%;
margin-top: 0;
margin-bottom: $dropdown-spacer;
}
.dropdown-toggle {
@include caret(up);
}
}
.dropright {
.dropdown-menu {
top: 0;
right: auto;
left: 100%;
margin-top: 0;
margin-left: $dropdown-spacer;
}
.dropdown-toggle {
@include caret(right);
&::after {
vertical-align: 0;
}
}
}
.dropleft {
.dropdown-menu {
top: 0;
right: 100%;
left: auto;
margin-top: 0;
margin-right: $dropdown-spacer;
}
.dropdown-toggle {
@include caret(left);
&::before {
vertical-align: 0;
}
}
}
// When enabled Popper.js, reset basic dropdown position
// stylelint-disable-next-line no-duplicate-selectors
.dropdown-menu {
&[x-placement^="top"],
&[x-placement^="right"],
&[x-placement^="bottom"],
&[x-placement^="left"] {
right: auto;
bottom: auto;
}
}
// Dividers (basically an `<hr>`) within the dropdown
.dropdown-divider {
@include nav-divider($dropdown-divider-bg, $dropdown-divider-margin-y);
}
// Links, buttons, and more within the dropdown menu
//
// `<button>`-specific styles are denoted with `// For <button>s`
.dropdown-item {
display: block;
width: 100%; // For `<button>`s
padding: $dropdown-item-padding-y $dropdown-item-padding-x;
clear: both;
font-weight: $font-weight-normal;
color: $dropdown-link-color;
text-align: inherit; // For `<button>`s
white-space: nowrap; // prevent links from randomly breaking onto new lines
background-color: transparent; // For `<button>`s
border: 0; // For `<button>`s
// Prevent dropdown overflow if there's no padding
// See https://github.com/twbs/bootstrap/pull/27703
@if $dropdown-padding-y == 0 {
&:first-child {
@include border-top-radius($dropdown-inner-border-radius);
}
&:last-child {
@include border-bottom-radius($dropdown-inner-border-radius);
}
}
@include hover-focus {
color: $dropdown-link-hover-color;
text-decoration: none;
@include gradient-bg($dropdown-link-hover-bg);
}
&.active,
&:active {
color: $dropdown-link-active-color;
text-decoration: none;
@include gradient-bg($dropdown-link-active-bg);
}
&.disabled,
&:disabled {
color: $dropdown-link-disabled-color;
pointer-events: none;
background-color: transparent;
// Remove CSS gradients if they're enabled
@if $enable-gradients {
background-image: none;
}
}
}
.dropdown-menu.show {
display: block;
}
// Dropdown section headers
.dropdown-header {
display: block;
padding: $dropdown-padding-y $dropdown-item-padding-x;
margin-bottom: 0; // for use with heading elements
@include font-size($font-size-sm);
color: $dropdown-header-color;
white-space: nowrap; // as with > li > a
}
// Dropdown text
.dropdown-item-text {
display: block;
padding: $dropdown-item-padding-y $dropdown-item-padding-x;
color: $dropdown-link-color;
}
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