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216
sass/bootstrap/_dropdowns.scss
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216
sass/bootstrap/_dropdowns.scss
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//
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// Dropdown menus
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// --------------------------------------------------
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// Dropdown arrow/caret
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.caret {
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display: inline-block;
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width: 0;
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height: 0;
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margin-left: 2px;
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vertical-align: middle;
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border-top: $caret-width-base dashed;
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border-top: $caret-width-base solid \9; // IE8
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border-right: $caret-width-base solid transparent;
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border-left: $caret-width-base solid transparent;
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}
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// The dropdown wrapper (div)
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.dropup,
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.dropdown {
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position: relative;
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}
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// Prevent the focus on the dropdown toggle when closing dropdowns
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.dropdown-toggle:focus {
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outline: 0;
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}
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// The dropdown menu (ul)
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.dropdown-menu {
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position: absolute;
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top: 100%;
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left: 0;
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z-index: $zindex-dropdown;
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display: none; // none by default, but block on "open" of the menu
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float: left;
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min-width: 160px;
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padding: 5px 0;
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margin: 2px 0 0; // override default ul
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list-style: none;
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font-size: $font-size-base;
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text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)
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background-color: $dropdown-bg;
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border: 1px solid $dropdown-fallback-border; // IE8 fallback
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border: 1px solid $dropdown-border;
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border-radius: $border-radius-base;
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@include box-shadow(0 6px 12px rgba(0,0,0,.175));
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background-clip: padding-box;
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// Aligns the dropdown menu to right
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//
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// Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`
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&.pull-right {
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right: 0;
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left: auto;
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}
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// Dividers (basically an hr) within the dropdown
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.divider {
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@include nav-divider($dropdown-divider-bg);
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}
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// Links within the dropdown menu
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> li > a {
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display: block;
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padding: 3px 20px;
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clear: both;
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font-weight: normal;
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line-height: $line-height-base;
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color: $dropdown-link-color;
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white-space: nowrap; // prevent links from randomly breaking onto new lines
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}
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}
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// Hover/Focus state
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.dropdown-menu > li > a {
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&:hover,
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&:focus {
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text-decoration: none;
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color: $dropdown-link-hover-color;
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background-color: $dropdown-link-hover-bg;
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}
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}
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// Active state
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.dropdown-menu > .active > a {
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&,
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&:hover,
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&:focus {
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color: $dropdown-link-active-color;
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text-decoration: none;
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outline: 0;
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background-color: $dropdown-link-active-bg;
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}
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}
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// Disabled state
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//
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// Gray out text and ensure the hover/focus state remains gray
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.dropdown-menu > .disabled > a {
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&,
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&:hover,
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&:focus {
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color: $dropdown-link-disabled-color;
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}
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// Nuke hover/focus effects
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&:hover,
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&:focus {
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text-decoration: none;
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background-color: transparent;
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background-image: none; // Remove CSS gradient
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@include reset-filter;
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cursor: $cursor-disabled;
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}
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}
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// Open state for the dropdown
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.open {
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// Show the menu
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> .dropdown-menu {
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display: block;
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}
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// Remove the outline when :focus is triggered
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> a {
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outline: 0;
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}
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}
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// Menu positioning
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//
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// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
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// menu with the parent.
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.dropdown-menu-right {
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left: auto; // Reset the default from `.dropdown-menu`
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right: 0;
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}
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// With v3, we enabled auto-flipping if you have a dropdown within a right
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// aligned nav component. To enable the undoing of that, we provide an override
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// to restore the default dropdown menu alignment.
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//
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// This is only for left-aligning a dropdown menu within a `.navbar-right` or
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// `.pull-right` nav component.
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.dropdown-menu-left {
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left: 0;
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right: auto;
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}
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// Dropdown section headers
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.dropdown-header {
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display: block;
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padding: 3px 20px;
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font-size: $font-size-small;
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line-height: $line-height-base;
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color: $dropdown-header-color;
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white-space: nowrap; // as with > li > a
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}
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// Backdrop to catch body clicks on mobile, etc.
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.dropdown-backdrop {
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position: fixed;
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left: 0;
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right: 0;
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bottom: 0;
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top: 0;
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z-index: ($zindex-dropdown - 10);
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}
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// Right aligned dropdowns
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.pull-right > .dropdown-menu {
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right: 0;
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left: auto;
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}
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// Allow for dropdowns to go bottom up (aka, dropup-menu)
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//
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// Just add .dropup after the standard .dropdown class and you're set, bro.
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// TODO: abstract this so that the navbar fixed styles are not placed here?
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.dropup,
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.navbar-fixed-bottom .dropdown {
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// Reverse the caret
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.caret {
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border-top: 0;
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border-bottom: $caret-width-base dashed;
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border-bottom: $caret-width-base solid \9; // IE8
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content: "";
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}
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// Different positioning for bottom up menu
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.dropdown-menu {
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top: auto;
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bottom: 100%;
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margin-bottom: 2px;
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}
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}
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// Component alignment
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//
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// Reiterate per navbar.less and the modified component alignment there.
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@media (min-width: $grid-float-breakpoint) {
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.navbar-right {
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.dropdown-menu {
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right: 0; left: auto;
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}
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// Necessary for overrides of the default right aligned menu.
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// Will remove come v4 in all likelihood.
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.dropdown-menu-left {
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left: 0; right: auto;
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}
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}
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}
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