resources/src/jquery/jquery.makeCollapsible.styles.less
/**
* These rules prevent re-flows relating to collapsible on-wiki elements (T42812).
* This is done by temporarily creating a pseudo element in the place that JavaScript will insert
* a toggle control. The same CSS rules that control the positioning of the toggle control will apply
* to the pseudo element. When the JavaScript has executed
* (See corresponding non-render blocking CSS in jquery.makeCollapsible)
* all pseudo elements will be removed.
*
* Currently we support all the examples on [[mw:Manual:Collapsible_elements/Demo/Simple]]
* All examples on [[mw:Manual:Collapsible_elements/Demo/Advanced]] are supported with the following
* exceptions
* - Custom collapsible 4 (table-row)
* -- CSS selector would be too complicated
* - Collapsible div nested in collapsed div
* -- Given it's not easy to identify the collapsed content via CSS, text will be shown until
* JavaScript has loaded
* - "Combination example"
* -- At a later time, we may want to support the use of of `attr`, but given the code
* complexity we will not for the time being (see https://davidwalsh.name/css-content-attr)
*/
// This selector is used frequently in the code to indicate that the JavaScript has successfully completed
// it's execution and pseudo elements can be disabled. For readability and maintainability it is separated
// as a LESS variable.
@exclude: ~'.mw-made-collapsible';
.client-js {
ol.mw-collapsible::before,
ul.mw-collapsible::before,
.mw-collapsible-toggle-li {
/*
* Rather than inherit any margins from the general li selector - make sure this is explicit
* to avoid reflows
*/
display: list-item;
list-style: none;
margin-bottom: 0.1em;
}
// Reset when mw-collapsible-toggle-li is rendered
ol.mw-made-collapsible::before,
ul.mw-made-collapsible::before {
display: none;
}
// table.: Where the tbody or thead is the first child of the collapsible table
.mw-collapsible:not( @{exclude} ) .mw-collapsible-toggle-placeholder:before,
ol.mw-collapsible:not( @{exclude} ):before,
ul.mw-collapsible:not( @{exclude} ):before,
table.mw-collapsible:not( @{exclude} ) :first-child tr:first-child th:last-child:before,
table.mw-collapsible:not( @{exclude} ) > caption:first-child:after,
div.mw-collapsible:not( @{exclude} ):before {
content: '[@{msg-collapsible-collapse}]';
}
.mw-collapsed:not( @{exclude} ) .mw-collapsible-toggle-placeholder:before,
td.mw-collapsed:not( @{exclude} ):before,
table.mw-collapsed:not( @{exclude} ) :first-child tr:first-child th:last-child:before,
table.mw-collapsed:not( @{exclude} ) > caption:first-child:after,
div.mw-collapsed:not( @{exclude} ):before {
content: '[@{msg-collapsible-expand}]';
}
// Any element with id beginning `mw-customcollapsible` will have special treatment
.mw-collapsible[ id^='mw-customcollapsible' ] th::before,
.mw-collapsible[ id^='mw-customcollapsible' ]::before {
content: none !important; // stylelint-disable-line declaration-no-important
}
// Any element with a placeholder toggle will have special treatment
// (this is a separate rule, because :has() is not supported by all browsers yet)
.mw-collapsible:not( @{exclude} ):has( .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder ) th::before,
.mw-collapsible:not( @{exclude} ):has( .mw-collapsible-toggle, .mw-collapsible-toggle-placeholder )::before {
content: none !important; // stylelint-disable-line declaration-no-important
}
// Special case for table where first child is caption element
table.mw-collapsible:not( @{exclude} ) > caption:first-child:after {
float: none;
display: block;
}
// Use the exclude selector to ensure animations do not break
.mw-collapsed:not( @{exclude} ) {
// Avoid FOUC/reflows on collapsed elements by making sure they are opened by default (T42812)
// > thead + tbody: 'https://www.mediawiki.org/wiki/Manual:Collapsible_elements/Demo/Simple#Collapsed_by_default'
> p,
> table,
> thead + tbody,
tr:not( :first-child ),
.mw-collapsible-content {
display: none;
}
}
}
/* Collapsible elements in the UI (outside of the content area) are not in either .mw-content-ltr or
* .mw-content-rtl. Align them based on the user language. */
.mw-collapsible:not( @{exclude} ) th:before,
.mw-collapsible:not( @{exclude} ):before,
.mw-collapsible-toggle-placeholder,
.mw-collapsible-toggle {
float: right;
}
/* For collapsible elements in the content area, override the alginment based on the content language. */
/* @noflip */
.mw-content-ltr,
.mw-content-rtl .mw-content-ltr {
.mw-collapsible:not( @{exclude} ) th:before,
.mw-collapsible:not( @{exclude} ):before,
.mw-collapsible-toggle-placeholder,
.mw-collapsible-toggle {
float: right;
}
}
/* @noflip */
.mw-content-rtl,
.mw-content-ltr .mw-content-rtl {
.mw-collapsible:not( @{exclude} ) th:before,
.mw-collapsible:not( @{exclude} ):before,
.mw-collapsible-toggle-placeholder,
.mw-collapsible-toggle {
float: left;
}
}
/* list-items go as wide as their parent element, don't float them inside list items */
li,
.mw-content-ltr li,
.mw-content-rtl li,
.mw-content-ltr .mw-content-rtl li,
.mw-content-rtl .mw-content-ltr li {
.mw-collapsible-toggle-placeholder,
.mw-collapsible-toggle {
float: none;
}
}
// special treatment for list items to match above
// !important necessary to override overly-specific float left and right above.
ol.mw-collapsible:not( @{exclude} ):before,
ul.mw-collapsible:not( @{exclude} ):before {
float: none !important; // stylelint-disable-line declaration-no-important
}