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StickyHeader.less
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#citizen-page-header-sticky-sentinel {
visibility: hidden;
height: 1px;
margin-top: -1px;
contain: strict;
}
.ve-activated,
.action-edit {
// HACK: So sticky header will never trigger in edit action
#citizen-page-header-sticky-sentinel {
display: none;
}
}
.citizen-sticky-header {
padding-inline: var( --padding-page );
border-bottom: var( --border-base );
// Need a separate background because backdrop-filter
// will apply to all elements inside the sticky header
&-background {
position: absolute;
inset: 0;
z-index: @z-index-bottom;
.mixin-citizen-frosted-glass( 0 );
}
&-container {
position: fixed;
top: 0;
right: 0;
left: 0;
z-index: @z-index-sticky;
visibility: hidden;
transform: translateY( -100% );
transition-timing-function: var( --transition-timing-function-ease-out );
transition-duration: var( --transition-duration-medium );
transition-property: transform, visibility;
@media ( min-width: @min-width-breakpoint-desktop ) {
margin-top: var( --header-size-block-start );
margin-right: var( --header-size-inline-end );
margin-left: var( --header-size-inline-start );
}
}
&-inner {
display: flex;
gap: var( --space-md );
align-items: center;
justify-content: space-between;
max-width: var( --width-page );
min-height: 3.25rem;
padding-block: var( --space-xxs );
margin-inline: auto;
}
&-start {
display: flex;
flex-grow: 1;
align-items: center;
margin-inline-start: -16px; // Compensate for the cdx button padding
overflow: hidden;
}
&-end {
display: flex;
align-items: center;
// Already have fixed page tools in narrow screen
@media ( max-width: @max-width-breakpoint-tablet ) {
display: none;
}
}
&-backtotop {
flex-grow: 1;
&.cdx-button {
gap: var( --space-xs );
justify-content: flex-start;
max-width: none;
}
&:hover {
.citizen-ui-icon.mw-ui-icon-wikimedia-arrowUp {
opacity: 1;
transform: none;
}
.citizen-sticky-header-page-info {
transform: translateX( calc( var( --size-icon ) + var( --space-xs ) ) );
}
}
.citizen-ui-icon {
position: absolute;
opacity: 0;
transform: translateX( -25% );
transition-timing-function: var( --transition-timing-function-ease );
transition-duration: var( --transition-duration-medium );
transition-property: opacity, transform;
}
}
&-page-info {
overflow: hidden;
transition-timing-function: var( --transition-timing-function-ease );
transition-duration: var( --transition-duration-base );
transition-property: transform;
}
&-page-title,
&-page-tagline {
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
&-page-title {
font-size: var( --font-size-large );
font-weight: var( --font-weight-semi-bold );
color: var( --color-emphasized );
}
&-page-tagline {
display: none;
font-size: var( --font-size-x-small );
color: var( --color-subtle );
}
&-dropdown-container {
.citizen-dropdown-details {
&[ open ] {
.citizen-dropdown-summary {
background-color: var( --background-color-button-quiet--active );
}
}
}
.citizen-dropdown {
position: relative;
}
.citizen-menu__card {
top: calc( 100% + var( --space-xs ) );
right: calc( var( --space-xs ) * -1 );
max-width: 80vw;
max-height: 60vh;
transform-origin: var( --transform-origin-offset-end ) var( --transform-origin-offset-start );
&-content {
padding-block: var( --space-xs );
}
}
}
// The buttons are not supposed to be focusable
.cdx-button {
&:focus {
border-color: transparent !important;
box-shadow: none !important;
}
}
}
.citizen-sticky-header-visible {
.citizen-sticky-header {
&-container {
visibility: visible;
transform: none;
}
}
}
// T289817 `.mw-sticky-header-element` provides an API for template developers
// to make their templates compatible with the Citizen sticky header.
.mw-sticky-header-element {
.mixin-citizen-sticky-header-element;
}

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Sat, Oct 3, 14:07 (21 h, 50 m ago)
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StickyHeader.less (3 KB)

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