View source for Help:TemplateStyles

<languages />
{{PD Help Page}}
<translate><!--T:76--> <tvar name=1>'''{{ll|Extension:TemplateStyles|nsp=0}}'''</tvar> enables the complex behavioral and aesthetic styling of {{<tvar name=2>ll|Help:Templates</tvar>|templates}} through the use of referenced external CSS files that are wiki pages themselves.</translate>
<translate><!--T:69--> Notably, the ability to create/modify the CSS files is included in the default permissions for [[<tvar name=1>Special:MyLanguage/Manual:Autoconfirmed users</tvar>|autoconfirmed users]] and so doesn't require involving someone with [[<tvar name=2>Special:MyLanguage/Manual:Interface administrators</tvar>|interface administrator]] privileges.</translate>

<translate>
== How does it work? == <!--T:2-->

<!--T:3-->
Editors can add {{<tvar name=2>tmpl|0=<code class="mw-highlight">{{^(}}{{#tag:span|templatestyles|class=nt}} {{attr|1=src|2="''[$1]''"}} /{{)^}}</code></tvar>|some page}} to a page and the contents of the referenced page will be parsed as [[w:Cascading Style Sheets|CSS]], sanitized and loaded on pages where the <tvar name=1>{{tag|templatestyles|open}}</tvar> tag is used (either directly, or transcluded by a template in use on the page).
</translate>

<translate><!--T:4--> <code>[some page]</code> must have the <code>sanitized-css</code> (<tvar name=int>{{int|content-model-sanitized-css}}</tvar>) [[<tvar name=contenthandler>Special:MyLanguage/Content handlers</tvar>|content model]], which is the default for subpages in the Template namespace that end with <code>.css</code>.</translate>
<translate><!--T:77--> The recommended usage pattern is to store the styles for <code>Template:Foo</code> in a subpage of the template they're most impactful upon, such as <code>Template:Foo/styles.css</code>.</translate>
<translate><!--T:5--> If <code>[some page]</code> lacks a namespace prefix, it defaults to the Template namespace. Thus, for example, <tvar name=1><syntaxhighlight lang=html inline><templatestyles src="Foo/styles.css" /></syntaxhighlight></tvar> will load <code>Template:Foo/styles.css</code>.</translate>

<translate>
<!--T:6-->
The <tvar name=1>{{tag|templatestyles|open}}</tvar> tag should be placed before the content that is styled, ideally at the top of the template or as close to there as possible, to avoid a potential [[w:Flash of unstyled content|flash of unstyled content]] if the page becomes initially visible while still only partially rendered.

== What problems does it solve? == <!--T:7-->

<!--T:13-->
TemplateStyles allows editors to associate style rules to specific pages, provides the full power of CSS stylesheets while filtering dangerous constructs, and works with preview/debug tools (such as <tvar name=1>{{ll|Extension:TemplateSandbox|nsp=0}}</tvar>) as expected.

<!--T:14-->
Lowering the access and maintainability barrier will hopefully result in more innovation in the way templates are visually designed, less maintenance overhead, and better adaptability to screen options (especially with mobile devices constituting [<tvar name=url>https://diff.wikimedia.org/2016/03/30/unique-devices-dataset/</tvar> more than half] of Wikipedia pageviews even as of <tvar name=1>{{ymd|2016|03|30}}</tvar>).

<!--T:8-->
Traditionally, there were two ways to style templates (or any other content) on MediaWiki pages, with neither approach working especially well:
</translate>

* <translate><!--T:70--> Using inline styles (that is, raw HTML code with added attributes like <tvar name=1>{{inline-code|lang=html+lasso|code=style="margin: 10px;"}}</tvar>)</translate>
* <translate><!--T:71--> Using certain special system messages such as <tvar name=1>{{ll|Manual:Interface/Stylesheets|MediaWiki:Common.css}}</tvar></translate>

<translate>
=== For inline styling === <!--T:9-->

<!--T:10-->
* There is no separation of content and presentation. In cases where the content does not come from a template (e.g. tables in articles), that will result in article wikitext that's unintelligible for most editors.</translate>
<translate>
<!--T:62-->
* Since styles are mixed with wikitext, {{<tvar name=1>ll|Extension:CodeMirror</tvar>|syntax highlighting}} and other forms of CSS editing support are difficult or impossible.</translate>
<translate>
<!--T:63-->
* Styles have to be repeated for each HTML element they apply to, which results in lots of copy-pasting and code that is hard to read and maintain.</translate>
<translate>
<!--T:64-->
* Style attributes are limited to a subset of CSS.</translate> <translate><!--T:95--> Most importantly, <tvar name=1><code>@media</code></tvar> rules needed for [[w:Responsive web design|responsive design]] do not work so it's impossible to make templates that work well over a wide range of screen sizes.</translate> <translate><!--T:96--> Furthermore, inline styles take precedence over CSS stylesheets so user-, skin- or device-specific customizations become more difficult.</translate>

<translate>
=== For system pages (<tvar name=1>MediaWiki:*.css</tvar>) === <!--T:11-->

<!--T:12-->
* Editing is limited to {{<tvar name=1>ll|MediaWiki 1.32/interface-admin</tvar>|interface administrators}}, which is a major barrier to participation.</translate>
<translate>
<!--T:65-->
* Editing restrictions cannot be lifted as there is no way to limit what CSS rules can be used, and some of them could be abused to track readers' IP addresses or even execute scripts in some older browsers.</translate>
<translate>
<!--T:66-->
* Changes are impossible to test without saving first.</translate> {{phab|T112474}}
<translate>
<!--T:67-->
* All stylesheets must be loaded on all pages (whether they actually use the page or not), which wastes bandwidth and makes debugging style rules harder.

== Is it safe? == <!--T:15-->
</translate>
<translate><!--T:16--> Yes! TemplateStyles includes a full-fledged {{<tvar name=1>ll|css-sanitizer</tvar>|CSS parser}} that reads, re-serializes and escapes all code and removes CSS rules which it does not recognize. The parser is sufficiently fine-grained to reject remote resources (such as background images) but allow local ones.</translate>
<translate><!--T:97--> CSS selectors are rewritten so that they cannot refer to elements outside article content.</translate>
<translate><!--T:98--> (Visually modifying areas outside article content by displacing parts of the article, e.g. via absolute positioning, is not prevented at this time. This is no change from the status quo, as such a thing was already possible with wikitext and inline styles.)</translate>

<translate>
== Allowed CSS properties and rules == <!--T:72-->
</translate>
<translate><!--T:73--> As of <tvar name=1>{{#timefl:2025-03-05T12:34:00-08:00|date}}</tvar>, TemplateStyles accepts no fewer than 331 CSS properties and aliases, including the vast majority of those most often used on the modern internet with official support by one or more major web browser.</translate>
<translate><!--T:78--> Beyond simple rules, <tvar name=1>{{cssi|@media}}, {{cssi|@page}}, {{cssi|@supports}}, {{cssi|@keyframe}}, {{cssi|@font-face}}/{{cssi|@font-feature-values}}</tvar> at-rules are also supported (with font-face restricted to fonts whose name starts with <tvar name=3><code>TemplateStyles</code></tvar>, for security reasons).</translate>

<translate><!--T:89--> The CSS <tvar name=1>{{cssi|var()}}</tvar> function is permitted only in properties taking a single color value and inside <tvar name=2>{{cssi|calc()}}</tvar>functions.</translate>
<translate><!--T:90--> Setting custom properties is not permitted.</translate>

{{Collapse|color=var(--color-base, #202122)|background-c=var(--background-color-progressive-subtle, #f1f4fd)|class=plainlinks|expand=no|header-bc=#7B68ee80|header-c=var(--background-color-progressive-subtle--active, #b6d4fb)|header-fs=0.95rem|margin=1.25rem auto|padding=1rem 1.5rem 0.75rem|title=<translate><!--T:74--> CSS property declarations permitted by <tvar name=1>css-sanitizer</tvar></translate> {{Efn|group=lower-alpha|name=current-asof}}{{Efn|group=lower-alpha|name=truth-source}}{{Efn|group=lower-alpha|name=vendor-prefixes}}|content=<big><translate><!--T:75--> '''Note:''' Each property is linked to a source of documentation on its usage, however the typical external link icons have been suppressed to prevent the obscuring of any links to footnotes that similarly appear in superscript.</translate></big>
{{Div col|colwidth=25em|rules=yes|style=margin: 1.75em 0 2.5rem;|content=
* '''{{Mono|align-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/align-content {{cssi|align-content}}]
** [https://developer.mozilla.org/docs/Web/CSS/align-items {{cssi|align-items}}]
** [https://developer.mozilla.org/docs/Web/CSS/align-self {{cssi|align-self}}]
* [https://developer.mozilla.org/docs/Web/CSS/animation {{cssi|animation}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-delay {{cssi|animation-delay}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-direction {{cssi|animation-direction}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-duration {{cssi|animation-duration}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-fill-mode {{cssi|animation-fill-mode}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-iteration-count {{cssi|animation-iteration-count}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-name {{cssi|animation-name}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-play-state {{cssi|animation-play-state}}]
** [https://developer.mozilla.org/docs/Web/CSS/animation-timing-function {{cssi|animation-timing-function}}]
* [https://developer.mozilla.org/docs/Web/CSS/appearance {{cssi|appearance}}]
* [https://developer.mozilla.org/docs/Web/CSS/aspect-ratio {{cssi|aspect-ratio}}]
* [https://developer.mozilla.org/docs/Web/CSS/background {{cssi|background}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-attachment {{cssi|background-attachment}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-blend-mode {{cssi|background-blend-mode}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-clip {{cssi|background-clip}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-color {{cssi|background-color}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-image {{cssi|background-image}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-origin {{cssi|background-origin}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-position {{cssi|background-position}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-repeat {{cssi|background-repeat}}]
** [https://developer.mozilla.org/docs/Web/CSS/background-size {{cssi|background-size}}]
* '''{{Mono|block-*}}'''
** [https://www.w3.org/TR/css-overflow-4/#block-ellipsis {{cssi|block-overflow}}] {{Efn|group=lower-alpha|name=block-ellipsis}}
** [https://developer.mozilla.org/docs/Web/CSS/block-size {{cssi|block-size}}]
* [https://developer.mozilla.org/docs/Web/CSS/border {{cssi|border}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-block {{cssi|border-block}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-block-color {{cssi|border-block-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-block-end {{cssi|border-block-end}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-end-color {{cssi|border-block-end-color}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-end-style {{cssi|border-block-end-style}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-end-width {{cssi|border-block-end-width}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-block-start {{cssi|border-block-start}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-start-color {{cssi|border-block-start-color}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-start-style {{cssi|border-block-start-style}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-block-start-width {{cssi|border-block-start-width}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-block-style {{cssi|border-block-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-block-width {{cssi|border-block-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-bottom {{cssi|border-bottom}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-bottom-color {{cssi|border-bottom-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-bottom-left-radius {{cssi|border-bottom-left-radius}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-bottom-right-radius {{cssi|border-bottom-right-radius}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-bottom-style {{cssi|border-bottom-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-bottom-width {{cssi|border-bottom-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-collapse {{cssi|border-collapse}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-color {{cssi|border-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-end-end-radius {{cssi|border-end-end-radius}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-end-start-radius {{cssi|border-end-start-radius}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-image {{cssi|border-image}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-image-outset {{cssi|border-image-outset}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-image-repeat {{cssi|border-image-repeat}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-image-slice {{cssi|border-image-slice}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-image-source {{cssi|border-image-source}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-image-width {{cssi|border-image-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-inline {{cssi|border-inline}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-inline-color {{cssi|border-inline-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-inline-end {{cssi|border-inline-end}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-end-color {{cssi|border-inline-end-color}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-end-style {{cssi|border-inline-end-style}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-end-width {{cssi|border-inline-end-width}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-inline-start {{cssi|border-inline-start}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-start-color {{cssi|border-inline-start-color}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-start-style {{cssi|border-inline-start-style}}]
**** [https://developer.mozilla.org/docs/Web/CSS/border-inline-start-width {{cssi|border-inline-start-width}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-inline-style {{cssi|border-inline-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-inline-width {{cssi|border-inline-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-left {{cssi|border-left}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-left-color {{cssi|border-left-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-left-style {{cssi|border-left-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-left-width {{cssi|border-left-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-radius {{cssi|border-radius}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-right {{cssi|border-right}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-right-color {{cssi|border-right-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-right-style {{cssi|border-right-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-right-width {{cssi|border-right-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-spacing {{cssi|border-spacing}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-start-end-radius {{cssi|border-start-end-radius}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-start-start-radius {{cssi|border-start-start-radius}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-style {{cssi|border-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-top {{cssi|border-top}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-top-color {{cssi|border-top-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-top-left-radius {{cssi|border-top-left-radius}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-top-right-radius {{cssi|border-top-right-radius}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-top-style {{cssi|border-top-style}}]
*** [https://developer.mozilla.org/docs/Web/CSS/border-top-width {{cssi|border-top-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/border-width {{cssi|border-width}}]
* [https://developer.mozilla.org/docs/Web/CSS/bottom {{cssi|bottom}}]
* '''{{Mono|box-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/box-decoration-break {{cssi|box-decoration-break}}]
** [https://developer.mozilla.org/docs/Web/CSS/box-shadow {{cssi|box-shadow}}]]
** [https://developer.mozilla.org/docs/Web/CSS/box-sizing {{cssi|box-sizing}}]
* '''{{Mono|break-*}}''' {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/break-after {{cssi|break-after}}] {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/break-before {{cssi|break-before}}] {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/break-inside {{cssi|break-inside}}] {{Efn|group=lower-alpha|name=page-break}}
* [https://developer.mozilla.org/docs/Web/CSS/caption-side {{cssi|caption-side}}]
* [https://www.w3.org/TR/css-ui-4/#caret {{cssi|caret}}]
** [https://developer.mozilla.org/docs/Web/CSS/caret-color {{cssi|caret-color}}]
** [https://www.w3.org/TR/css-ui-4/#caret-shape {{cssi|caret-shape}}]
* [https://developer.mozilla.org/docs/Web/CSS/clear {{cssi|clear}}]
* [https://developer.mozilla.org/docs/Web/CSS/clip {{cssi|clip}}] {{Efn|group=lower-alpha|name=clip}}
** [https://developer.mozilla.org/docs/Web/CSS/clip-path {{cssi|clip-path}}]
** [https://developer.mozilla.org/docs/Web/CSS/clip-rule {{cssi|clip-rule}}]
* [https://developer.mozilla.org/docs/Web/CSS/color {{cssi|color}}]
** [https://developer.mozilla.org/docs/Web/CSS/color-interpolation-filters {{cssi|color-interpolation-filters}}]
* [https://developer.mozilla.org/docs/Web/CSS/columns {{cssi|columns}}]
** [https://developer.mozilla.org/docs/Web/CSS/column-count {{cssi|column-count}}]
** [https://developer.mozilla.org/docs/Web/CSS/column-width {{cssi|column-width}}]
** '''{{Mono|column-*}}'''
*** [https://developer.mozilla.org/docs/Web/CSS/column-fill {{cssi|column-fill}}]
*** [https://developer.mozilla.org/docs/Web/CSS/column-gap {{cssi|column-gap}}] {{Efn|group=lower-alpha|name=grid-column-gap}}
*** [https://developer.mozilla.org/docs/Web/CSS/column-rule {{cssi|column-rule}}]
**** [https://developer.mozilla.org/docs/Web/CSS/column-rule-color {{cssi|column-rule-color}}]
**** [https://developer.mozilla.org/docs/Web/CSS/column-rule-style {{cssi|column-rule-style}}]
**** [https://developer.mozilla.org/docs/Web/CSS/column-rule-width {{cssi|column-rule-width}}]
*** [https://developer.mozilla.org/docs/Web/CSS/column-span {{cssi|column-span}}]
* '''{{Mono|contain-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-block-size {{cssi|contain-intrinsic-block-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-height {{cssi|contain-intrinsic-height}}]
** [https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-inline-size {{cssi|contain-intrinsic-inline-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-size {{cssi|contain-intrinsic-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/contain-intrinsic-width {{cssi|contain-intrinsic-width}}]
* [https://developer.mozilla.org/docs/Web/CSS/content {{cssi|content}}]
* [https://drafts.csswg.org/css-overflow-4/#continue {{cssi|continue}}] {{Efn|group=lower-alpha|name=region-fragment}}
* '''{{Mono|counter-*}}'''
* [https://developer.mozilla.org/docs/Web/CSS/counter-increment {{cssi|counter-increment}}]
* [https://developer.mozilla.org/docs/Web/CSS/counter-reset {{cssi|counter-reset}}]
* [https://developer.mozilla.org/docs/Web/CSS/cursor {{cssi|cursor}}]
* [https://developer.mozilla.org/docs/Web/CSS/direction {{cssi|direction}}]
* [https://developer.mozilla.org/docs/Web/CSS/display {{cssi|display}}]
* [https://developer.mozilla.org/docs/Web/CSS/empty-cells {{cssi|empty-cells}}]
* [https://developer.mozilla.org/docs/Web/CSS/filter {{cssi|filter}}]
* [https://developer.mozilla.org/docs/Web/CSS/flex {{cssi|flex}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-basis {{cssi|flex-basis}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-direction {{cssi|flex-direction}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-flow {{cssi|flex-flow}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-grow {{cssi|flex-grow}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-shrink {{cssi|flex-shrink}}]
** [https://developer.mozilla.org/docs/Web/CSS/flex-wrap {{cssi|flex-wrap}}]
* [https://developer.mozilla.org/docs/Web/CSS/float {{cssi|float}}]
* '''{{Mono|flood-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/flood-color {{cssi|flood-color}}]
** [https://developer.mozilla.org/docs/Web/CSS/flood-opacity {{cssi|flood-opacity}}]
* [https://developer.mozilla.org/docs/Web/CSS/font {{cssi|font}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-family {{cssi|font-family}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-feature-settings {{cssi|font-feature-settings}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-kerning {{cssi|font-kerning}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-size {{cssi|font-size}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-size-adjust {{cssi|font-size-adjust}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-stretch {{cssi|font-stretch}}] {{Efn|group=lower-alpha|name=font-width}}
** [https://developer.mozilla.org/docs/Web/CSS/font-style {{cssi|font-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-synthesis {{cssi|font-synthesis}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-variant {{cssi|font-variant}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-variant-caps {{cssi|font-variant-caps}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-variant-east-asian {{cssi|font-variant-east-asian}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-variant-ligatures {{cssi|font-variant-ligatures}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-variant-numeric {{cssi|font-variant-numeric}}]
*** [https://developer.mozilla.org/docs/Web/CSS/font-variant-position {{cssi|font-variant-position}}]
** [https://developer.mozilla.org/docs/Web/CSS/font-weight {{cssi|font-weight}}]
* [https://developer.mozilla.org/docs/Web/CSS/gap {{cssi|gap}}] {{Efn|group=lower-alpha|name=grid-gap}}
* [https://developer.mozilla.org/docs/Web/CSS/grid {{cssi|grid}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-area {{cssi|grid-area}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-auto-columns {{cssi|grid-auto-columns}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-auto-flow {{cssi|grid-auto-flow}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-auto-rows {{cssi|grid-auto-rows}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-column {{cssi|grid-column}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-column-end {{cssi|grid-column-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-column-start {{cssi|grid-column-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-row {{cssi|grid-row}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-row-end {{cssi|grid-row-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-row-start {{cssi|grid-row-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/grid-template {{cssi|grid-template}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-template-areas {{cssi|grid-template-areas}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-template-columns {{cssi|grid-template-columns}}]
*** [https://developer.mozilla.org/docs/Web/CSS/grid-template-rows {{cssi|grid-template-rows}}]
* [https://developer.mozilla.org/docs/Web/CSS/hanging-punctuation {{cssi|hanging-punctuation}}]
* [https://developer.mozilla.org/docs/Web/CSS/height {{cssi|height}}]
* [https://developer.mozilla.org/docs/Web/CSS/hyphens {{cssi|hyphens}}]
* '''{{Mono|image-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/image-orientation {{cssi|image-orientation}}]
** [https://developer.mozilla.org/docs/Web/CSS/image-rendering {{cssi|image-rendering}}]
* [https://developer.mozilla.org/docs/Web/CSS/inline-size {{cssi|inline-size}}]
* [https://developer.mozilla.org/docs/Web/CSS/inset {{cssi|inset}}] {{Efn|group=lower-alpha|name=offset-inset}}
** [https://developer.mozilla.org/docs/Web/CSS/inset-block {{cssi|inset-block}}]
*** [https://developer.mozilla.org/docs/Web/CSS/inset-block-end {{cssi|inset-block-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/inset-block-start {{cssi|inset-block-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/inset-inline {{cssi|inset-inline}}]
*** [https://developer.mozilla.org/docs/Web/CSS/inset-inline-end {{cssi|inset-inline-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/inset-inline-start {{cssi|inset-inline-start}}]
* [https://developer.mozilla.org/docs/Web/CSS/isolation {{cssi|isolation}}]
* '''{{Mono|justify-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/justify-content {{cssi|justify-content}}]
** [https://developer.mozilla.org/docs/Web/CSS/justify-items {{cssi|justify-items}}]
** [https://developer.mozilla.org/docs/Web/CSS/justify-self {{cssi|justify-self}}]
* [https://developer.mozilla.org/docs/Web/CSS/left {{cssi|left}}]
* [https://developer.mozilla.org/docs/Web/CSS/letter-spacing {{cssi|letter-spacing}}]
* [https://developer.mozilla.org/docs/Web/CSS/lighting-color {{cssi|lighting-color}}]
* '''{{Mono|line-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/line-break {{cssi|line-break}}]
** [https://developer.mozilla.org/docs/Web/CSS/line-clamp {{cssi|line-clamp}}]
** [https://developer.mozilla.org/docs/Web/CSS/line-height {{cssi|line-height}}]
* [https://developer.mozilla.org/docs/Web/CSS/list-style {{cssi|list-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/list-style-image {{cssi|list-style-image}}]
** [https://developer.mozilla.org/docs/Web/CSS/list-style-position {{cssi|list-style-position}}]
** [https://developer.mozilla.org/docs/Web/CSS/list-style-type {{cssi|list-style-type}}]
* [https://developer.mozilla.org/docs/Web/CSS/margin {{cssi|margin}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-block {{cssi|margin-block}}]
*** [https://developer.mozilla.org/docs/Web/CSS/margin-block-end {{cssi|margin-block-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/margin-block-start {{cssi|margin-block-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-bottom {{cssi|margin-bottom}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-inline {{cssi|margin-inline}}]
*** [https://developer.mozilla.org/docs/Web/CSS/margin-inline-end {{cssi|margin-inline-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/margin-inline-start {{cssi|margin-inline-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-left {{cssi|margin-left}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-right {{cssi|margin-right}}]
** [https://developer.mozilla.org/docs/Web/CSS/margin-top {{cssi|margin-top}}]
* [https://developer.mozilla.org/docs/Web/CSS/mask {{cssi|mask}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-border {{cssi|mask-border}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-mode {{cssi|mask-border-mode}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-outset {{cssi|mask-border-outset}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-repeat {{cssi|mask-border-repeat}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-slice {{cssi|mask-border-slice}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-source {{cssi|mask-border-source}}]
*** [https://developer.mozilla.org/docs/Web/CSS/mask-border-width {{cssi|mask-border-width}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-clip {{cssi|mask-clip}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-composite {{cssi|mask-composite}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-image {{cssi|mask-image}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-mode {{cssi|mask-mode}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-origin {{cssi|mask-origin}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-position {{cssi|mask-position}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-repeat {{cssi|mask-repeat}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-size {{cssi|mask-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/mask-type {{cssi|mask-type}}]
* '''{{Mono|max-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/max-block-size {{cssi|max-block-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/max-height {{cssi|max-height}}]
** [https://developer.mozilla.org/docs/Web/CSS/max-inline-size {{cssi|max-inline-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/max-width {{cssi|max-width}}]
* [https://www.w3.org/TR/css-overflow-4/#max-lines {{cssi|max-lines}}]
* '''{{Mono|min-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/min-block-size {{cssi|min-block-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/min-height {{cssi|min-height}}]
** [https://developer.mozilla.org/docs/Web/CSS/min-inline-size {{cssi|min-inline-size}}]
** [https://developer.mozilla.org/docs/Web/CSS/min-width {{cssi|min-width}}]
* [https://www.w3.org/TR/css-sizing-4/#intrinsic-contribution-override {{cssi|min-intrinsic-sizing}}]
* [https://developer.mozilla.org/docs/Web/CSS/mix-blend-mode {{cssi|mix-blend-mode}}]
* '''{{Mono|nav-*}}'''
** [https://www.w3.org/TR/css-ui-4/#nav-dir {{cssi|nav-down}}]
** [https://www.w3.org/TR/css-ui-4/#nav-dir {{cssi|nav-left}}]
** [https://www.w3.org/TR/css-ui-4/#nav-dir {{cssi|nav-right}}]
** [https://www.w3.org/TR/css-ui-4/#nav-dir {{cssi|nav-up}}]
* '''{{Mono|object-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/object-fit {{cssi|object-fit}}]
** [https://developer.mozilla.org/docs/Web/CSS/object-position {{cssi|object-position}}]
* '''{{Mono|offset-*}}''' {{Efn|group=lower-alpha|name=offset-inset}}
** [https://developer.mozilla.org/docs/Web/CSS/offset-anchor {{cssi|offset-anchor}}]
** [https://developer.mozilla.org/docs/Web/CSS/offset-position {{cssi|offset-position}}]
** [https://developer.mozilla.org/docs/Web/CSS/offset-path {{cssi|offset-path}}]
** [https://developer.mozilla.org/docs/Web/CSS/offset-distance {{cssi|offset-distance}}]
** [https://developer.mozilla.org/docs/Web/CSS/offset-rotate {{cssi|offset-rotate}}]
** <code>{{del|offset-after|Superseded by inset-*.}}</code>
** <code>{{del|offset-before|Superseded by inset-*.}}</code>
** <code>{{del|offset-end|Superseded by inset-*.}}</code>
** <code>{{del|offset-start|Superseded by inset-*.}}</code>
* [https://developer.mozilla.org/docs/Web/CSS/opacity {{cssi|opacity}}]
* [https://developer.mozilla.org/docs/Web/CSS/order {{cssi|order}}]
* [https://developer.mozilla.org/docs/Web/CSS/orphans {{cssi|orphans}}]
* [https://developer.mozilla.org/docs/Web/CSS/outline {{cssi|outline}}]
** [https://developer.mozilla.org/docs/Web/CSS/outline-color {{cssi|outline-color}}]
** [https://developer.mozilla.org/docs/Web/CSS/outline-offset {{cssi|outline-offset}}]
** [https://developer.mozilla.org/docs/Web/CSS/outline-style {{cssi|outline-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/outline-width {{cssi|outline-width}}]
* [https://developer.mozilla.org/docs/Web/CSS/overflow {{cssi|overflow}}]
** [https://developer.mozilla.org/docs/Web/CSS/overflow-block {{cssi|overflow-block}}]
** [https://developer.mozilla.org/docs/Web/CSS/overflow-inline {{cssi|overflow-inline}}]
** [https://developer.mozilla.org/docs/Web/CSS/overflow-wrap {{cssi|overflow-wrap}}] {{Efn|group=lower-alpha|name=word-wrap}}
** [https://developer.mozilla.org/docs/Web/CSS/overflow-x {{cssi|overflow-x}}]
** [https://developer.mozilla.org/docs/Web/CSS/overflow-y {{cssi|overflow-y}}]
* [https://developer.mozilla.org/docs/Web/CSS/padding {{cssi|padding}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-block {{cssi|padding-block}}]
*** [https://developer.mozilla.org/docs/Web/CSS/padding-block-end {{cssi|padding-block-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/padding-block-start {{cssi|padding-block-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-bottom {{cssi|padding-bottom}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-inline {{cssi|padding-inline}}]
*** [https://developer.mozilla.org/docs/Web/CSS/padding-inline-end {{cssi|padding-inline-end}}]
*** [https://developer.mozilla.org/docs/Web/CSS/padding-inline-start {{cssi|padding-inline-start}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-left {{cssi|padding-left}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-right {{cssi|padding-right}}]
** [https://developer.mozilla.org/docs/Web/CSS/padding-top {{cssi|padding-top}}]
* '''{{Mono|page-break-*}}''' {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/page-break-after {{cssi|page-break-after}}] {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/page-break-before {{cssi|page-break-before}}] {{Efn|group=lower-alpha|name=page-break}}
** [https://developer.mozilla.org/docs/Web/CSS/page-break-inside {{cssi|page-break-inside}}] {{Efn|group=lower-alpha|name=page-break}}
* '''{{Mono|place-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/place-content {{cssi|place-content}}]
** [https://developer.mozilla.org/docs/Web/CSS/place-items {{cssi|place-items}}]
** [https://developer.mozilla.org/docs/Web/CSS/place-self {{cssi|place-self}}]
* [https://developer.mozilla.org/docs/Web/CSS/position {{cssi|position}}]
* [https://developer.mozilla.org/docs/Web/CSS/quotes {{cssi|quotes}}]
* [https://developer.mozilla.org/docs/Web/CSS/resize {{cssi|resize}}]
* [https://developer.mozilla.org/docs/Web/CSS/right {{cssi|right}}]
* [https://developer.mozilla.org/docs/Web/CSS/row-gap {{cssi|row-gap}}] {{Efn|group=lower-alpha|name=grid-row-gap}}
* '''{{Mono|shape-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/shape-image-threshold {{cssi|shape-image-threshold}}]
** [https://developer.mozilla.org/docs/Web/CSS/shape-margin {{cssi|shape-margin}}]
** [https://developer.mozilla.org/docs/Web/CSS/shape-outside {{cssi|shape-outside}}]
* [https://developer.mozilla.org/docs/Web/CSS/tab-size {{cssi|tab-size}}]
* [https://developer.mozilla.org/docs/Web/CSS/table-layout {{cssi|table-layout}}]
* '''{{Mono|text-*}}'''
** [https://developer.mozilla.org/docs/Web/CSS/text-align {{cssi|text-align}}] {{Efn|group=lower-alpha|name=text-align-all}}
*** [https://www.w3.org/TR/2018/WD-css-text-3-20181206/#text-align-all-property {{cssi|text-align-all}}] {{Efn|group=lower-alpha|name=text-align-all}}
*** [https://developer.mozilla.org/docs/Web/CSS/text-align-last {{cssi|text-align-last}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-combine-upright {{cssi|text-combine-upright}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-decoration {{cssi|text-decoration}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-decoration-color {{cssi|text-decoration-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-decoration-line {{cssi|text-decoration-line}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-decoration-style {{cssi|text-decoration-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-emphasis {{cssi|text-emphasis}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-emphasis-color {{cssi|text-emphasis-color}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-emphasis-position {{cssi|text-emphasis-position}}]
*** [https://developer.mozilla.org/docs/Web/CSS/text-emphasis-style {{cssi|text-emphasis-style}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-indent {{cssi|text-indent}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-justify {{cssi|text-justify}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-orientation {{cssi|text-orientation}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-overflow {{cssi|text-overflow}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-shadow {{cssi|text-shadow}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-transform {{cssi|text-transform}}]
** [https://developer.mozilla.org/docs/Web/CSS/text-underline-position {{cssi|text-underline-position}}]
* [https://developer.mozilla.org/docs/Web/CSS/top {{cssi|top}}]
* [https://developer.mozilla.org/docs/Web/CSS/transform {{cssi|transform}}]
** [https://developer.mozilla.org/docs/Web/CSS/transform-box {{cssi|transform-box}}]
** [https://developer.mozilla.org/docs/Web/CSS/transform-origin {{cssi|transform-origin}}]
* [https://developer.mozilla.org/docs/Web/CSS/transition {{cssi|transition}}]
** [https://developer.mozilla.org/docs/Web/CSS/transition-delay {{cssi|transition-delay}}]
** [https://developer.mozilla.org/docs/Web/CSS/transition-duration {{cssi|transition-duration}}]
** [https://developer.mozilla.org/docs/Web/CSS/transition-property {{cssi|transition-property}}]
** [https://developer.mozilla.org/docs/Web/CSS/transition-timing-function {{cssi|transition-timing-function}}]
* [https://developer.mozilla.org/docs/Web/CSS/unicode-bidi {{cssi|unicode-bidi}}]
* [https://developer.mozilla.org/docs/Web/CSS/user-select {{cssi|user-select}}]
** [https://developer.mozilla.org/docs/Web/CSS/user-select {{cssi|-moz-user-select}}]
** [https://docs3.w3cub.com/css/-ms-user-select/ {{cssi|-ms-user-select}}]
** [https://www.w3.org/TR/css-ui-4/#content-selection {{cssi|-webkit-user-select}}]
* [https://developer.mozilla.org/docs/Web/CSS/vertical-align {{cssi|vertical-align}}]
* [https://developer.mozilla.org/docs/Web/CSS/visibility {{cssi|visibility}}]
* [https://developer.mozilla.org/docs/Web/CSS/white-space {{cssi|white-space}}]
* [https://developer.mozilla.org/docs/Web/CSS/widows {{cssi|widows}}]
* [https://developer.mozilla.org/docs/Web/CSS/width {{cssi|width}}]
* [https://developer.mozilla.org/docs/Web/CSS/word-break {{cssi|word-break}}]
* [https://developer.mozilla.org/docs/Web/CSS/word-spacing {{cssi|word-spacing}}]
* [https://developer.mozilla.org/docs/Web/CSS/writing-mode {{cssi|writing-mode}}]
* [https://developer.mozilla.org/docs/Web/CSS/z-index {{cssi|z-index}}]
}}

<hr style="border: none;  box-shadow: inset 0 12px 12px -12px #00000080; height: 0.75rem; margin: 2.5rem 1rem 0;" />
<p style="font-size: 1rem; font-weight: 600; margin: 0.25rem 0 -0.5rem; text-decoration: underline #000 solid from-font;">{{Int|coll-rendering_finished_notes_heading}}</p>
{{Notelist|colwidth=36em|group=lower-alpha|notes=
{{Efn|group=lower-alpha|name=current-asof|reference=<translate><!--T:86--> This list is current as of changeset <tvar name=1>[https://phabricator.wikimedia.org/rCSSSffe10a21512f00405b4d0d124eb2c4866749e300 ffe10a21512f]</tvar> to the css-sanitizer [[<tvar name=2>git:css-sanitizer</tvar>|source code repository]], authored at <tvar name=3>{{#timefl:2025-03-05T12:34:00-08:00|both}}</tvar>.</translate>}}
{{Efn|group=lower-alpha|name=truth-source|reference=<translate><!--T:87--> The authoritative reference for these properties will always be the source code for the <tvar name=1>{{ll|css-sanitizer}}</tvar> library, specifically the <tvar name=2><code>[[gerrit:plugins/gitiles/css-sanitizer/+/refs/heads/master/src/Sanitizer/StylePropertySanitizer.php|src/Sanitizer/StylePropertySanitizer.php]]</code></tvar> file.</translate> <translate><!--T:88--> When reviewing it, a simple method for bringing them into greater focus is to perform a full text search of the contents for the string <tvar name=1>{{phpi|$props}}</tvar>.</translate>}}
{{Efn|group=lower-alpha|name=vendor-prefixes|reference=<translate><!--T:91--> Non-standard properties—including those with vendor prefixes, except for the vendor-prefixed <tvar name=1><code>-*-user-select</code></tvar> group—have never been recognized by this extension and continue to be automatically rejected, as of <tvar name=2>{{ymd|2024|01|02}}</tvar>; see <tvar name=3>[[phab:T162379]]</tvar>: ''Decide which non-standard CSS properties to support in TemplateStyles'' for notice of any progress on a resolution to this issue.</translate>}}
{{Efn|group=lower-alpha|name=block-ellipsis|reference=<translate><!--T:99--> The modern <tvar name=1>{{cssi|block-ellipsis}}</tvar> property is present in the extension source code only by its original name, <tvar name=2>{{cssi|block-overflow}}</tvar> (<tvar name=3>[[gerrit:plugins/gitiles/css-sanitizer/+/ffe10a21512f00405b4d0d124eb2c4866749e300/src/Sanitizer/StylePropertySanitizer.php#676|StylePropertySanitizer.php]]</tvar>).</translate> <translate><!--T:92--> Though the property was [<tvar name=url>https://github.com/w3c/csswg-drafts/commit/20b15b4d66b0fdfa8406f1ce28604128f02ee7bb#diff-98396261e9414947537a34ccbec62246077c62dc2046cf781b4d3c9fa2cbf958R793</tvar> renamed during drafting by the {{<tvar name=1>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} in <tvar name=2>{{ymd|2018|08|24}}</tvar>] and is now only a legacy alias, until the extension is updated only the original property name is accepted as valid.</translate>}}
{{Efn|group=lower-alpha|name=grid-column-gap|reference=<translate><!--T:100--> The legacy name alias <tvar name=1>{{cssi|grid-column-gap}}</tvar> is also accepted as valid by this extension and is evaluated exactly as if its modern replacement property name, <tvar name=2>{{cssi|column-gap}}</tvar>, had been used.</translate>}}
{{Efn|group=lower-alpha|name=clip|reference=<translate><!--T:101--> The <tvar name=1>{{del|clip}}</tvar> property was [<tvar name=url>https://github.com/w3c/fxtf-drafts/commit/4e95a63a1b09e497cdf36ce0555250bac8b0ea4b#diff-7f6fc2554260a4482e466cfb8ad217e8fbbb95c736de14adbf0cc8a281caf740R116</tvar> deprecated by the {{<tvar name=2>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} in <tvar name=3>{{ymd|2018|07|22}}</tvar>], and official guidance was added to use the <tvar name=4>{{cssi|clip-path}}</tvar> property in its place; it is subject to removal at any time due to definition conflicts with other properties.</translate>}}
{{Efn|group=lower-alpha|name=region-fragment|reference=<translate><!--T:102--> The modern <tvar name=1>{{cssi|continue}}</tvar> property, which is accepted by this extension, must always be used in place of the older <tvar name=2>{{cssi|region-fragment}}</tvar> property, which it never accepted as valid.</translate> <translate><!--T:93--> The {{<tvar name=1>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} describes 'continue' as generalizing the older property ahead of replacing it altogether, but care must be taken during the conversion as different values must be defined to achieve identical behaviors between the two.</translate>}}
{{Efn|group=lower-alpha|name=font-width|reference=<translate><!--T:103--> The modern <tvar name=1>{{cssi|font-width}}</tvar> property is present in the extension source code only by its original name, <tvar name=2>{{cssi|font-stretch}}</tvar> (<tvar name=3>[[gerrit:plugins/gitiles/css-sanitizer/+/ffe10a21512f00405b4d0d124eb2c4866749e300/src/Sanitizer/StylePropertySanitizer.php#543|StylePropertySanitizer.php]]</tvar>).</translate> <translate><!--T:94--> Though the original name was [<tvar name=url>https://github.com/w3c/csswg-drafts/commit/b0660ee070c55cc9b2669498460fc0210d105403#diff-01ee51d59dcf6f0dc934ac6f973361de4667f36aaaea9befa0be6312f1ebe2beR417</tvar> deprecated by the {{<tvar name=1>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} in <tvar name=2>{{ymd|2024|01|23}}</tvar>] and remains only as a legacy alias, until the extension is updated only the original property name is accepted as valid.</translate>}}
{{Efn|group=lower-alpha|name=grid-gap|reference=<translate><!--T:104--> The legacy name alias <tvar name=1>{{cssi|grid-gap}}</tvar> is also accepted as valid by this extension and is evaluated exactly as if its modern replacement property name, <tvar name=2>{{cssi|gap}}</tvar>, had been used.</translate>}}
{{Efn|group=lower-alpha|name=grid-row-gap|reference=<translate><!--T:105--> The legacy name alias <tvar name=1>{{cssi|grid-row-gap}}</tvar> is also accepted as valid by this extension and is evaluated exactly as if its modern replacement property name, <tvar name=2>{{cssi|row-gap}}</tvar>, had been used.</translate>}}
{{Efn|group=lower-alpha|name=word-wrap|reference=<translate><!--T:106--> The non-standard property, <tvar name=1>{{cssi|word-wrap}}</tvar>, is also accepted as valid by this extension and is directly aliased to the official property <tvar name=2>{{cssi|overflow-wrap}}</tvar>.</translate>}}
{{Efn|group=lower-alpha|name=page-break|reference=<translate><!--T:107--> The <tvar name=1>{{cssi|page-break-*}}</tvar> properties from CSS2 were [<tvar name=url1>https://github.com/w3c/csswg-drafts/commit/316eb3768307e0bf976c1b956420f597fab92d22#diff-5cada336cba405b3e1f3934a38df26c0f86441284cc7a457f6609fda3726f75cR1157</tvar> deprecated by the {{<tvar name=2>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} in <tvar name=3>{{ymd|2018|09|15}}</tvar> and persist only as legacy shorthands] for the [<tvar name=url2>https://www.w3.org/TR/css-break-3/#breaking-controls</tvar> <tvar name=4>{{cssi|break-*}}</tvar> replacement properties from the CSS3 Fragmentation module].</translate> <translate><!--T:108--> They are subject to removal in the future and users are strenuously encouraged to replace all uses of the older properties explicitly, paying attention to the fact that not all values have a 1:1 equivalent mapping with the replacements' values.</translate> <translate><!--T:109--> Several popular user agents have already demonstrated flawed and inconsistent behavior when the legacy shorthands are present on a page.</translate>}}
{{Efn|group=lower-alpha|name=text-align-all|reference=<translate><!--T:110--> Though the creation of the [<tvar name=url1>https://www.w3.org/TR/2018/WD-css-text-3-20181206/#text-align-property</tvar> <tvar name=2>{{cssi|text-align-all}}</tvar> property as a constituent value of the <tvar name=3>{{cssi|text-align}}</tvar> shorthand] by the {{<tvar name=4>Abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}} took place in <tvar name=5>{{ymd|2018|12|06}}</tvar>, supporting implementations did not begin [<tvar name=url2>https://wpt.fyi/results/css/css-text/parsing/text-align-all-valid.html?run_id=5132269339803648&run_id=5089047741726720&run_id=5068400927965184&run_id=5138351013494784</tvar> appearing until 2025] and, as of the most recent official guidance on <tvar name=6>{{ymd|2025|03|24}}</tvar>, the recommendation to eschew the new property and continue to use the shorthand remains in effect.</translate>}}
{{Efn|group=lower-alpha|name=offset-inset|reference=<translate><!--T:111--> The <tvar name=1>{{mono|offset-*}}</tvar> properties were [<tvar name=url>https://www.w3.org/TR/2025/WD-css-position-3-20250311/</tvar> renamed <tvar name=2>{{cssi|inset-*}}</tvar> in <tvar name=3>{{ymd|2025|03|11}}</tvar> by the {{<tvar name=4>abbr</tvar>|the World Wide Web Consortium's Cascading Style Sheets Working Group|W3C-CSSWG}}] in the CSS Position 3 module, which supersedes and replaces CSS Logical 1.</translate> <translate><!--T:112--> The [<tvar name=url>https://github.com/wikimedia/css-sanitizer/commit/e0fb30f672d10ecf70322fb69e587334bade7740</tvar> 'flow-relative offsets' are now renamed in concordance]: <tvar name=1>{{ltt|noconj=1|{{cssi|inset-block-start}}|{{cssi|inset-block-end}}|{{cssi|inset-inline-start}}|{{cssi|inset-inline-end}}}}</tvar> properties and <tvar name=2>{{ltt|{{cssi|inset-block}}|{{cssi|inset-inline}}|{{cssi|inset}}}}</tvar> shorthands.</translate> <translate><!--T:113--> The deprecated <tvar name=1>{{mono|offset-*}}</tvar> ''properties'' should be distinguished from the still existant <tvar name=2>{{cssi|offset-*}}</tvar> ''shorthands'', <tvar name=3>{{ltt|[https://developer.mozilla.org/docs/Web/CSS/offset-anchor {{cssi|offset-anchor}}]|[https://developer.mozilla.org/docs/Web/CSS/offset-position {{cssi|offset-position}}]|[https://developer.mozilla.org/docs/Web/CSS/offset-path {{cssi|offset-path}}]|[https://developer.mozilla.org/docs/Web/CSS/offset-distance {{cssi|offset-distance}}]|[https://developer.mozilla.org/docs/Web/CSS/offset-rotate {{cssi|offset-rotate}}]}}</tvar>.</translate>}}
}}}}

<translate>
== How can I target mobile/desktop resolutions? == <!--T:36-->
</translate>
<translate><!--T:37--> Media queries allow you to target elements at mobile resolution and desktop resolution.</translate>
<translate><!--T:38--> Some advise making your styles mobile friendly by default and wrapping desktop styles within the media query.</translate>
<translate><!--T:39--> Note, MediaWiki [[<tvar name=1>gerrit:plugins/gitiles/mediawiki/core/+/master/resources/lib/ooui/wikimedia-ui-base.less</tvar>|has standardised on <tvar name=2>640px</tvar> and <tvar name=3>1120px</tvar> breakpoints]] to represent tablet and desktop.</translate>

<translate>
== How can I target specific skins? == <!--T:40-->
</translate>
<translate><!--T:41--> MediaWiki provides various classes on the <code>html</code> and <code>body</code> elements, including one that indicates which skin is in use.</translate>
<translate><!--T:42--> These can be targeted by including a simple selector for the <code>html</code> or <code>body</code> element including the needed classes, followed by a space (or in CSS terms, the descendant combinator).</translate>

<translate><!--T:43--> Generally, this technique should be used for design consistency, rather than targeting mobile and desktop as all skins can be used in both mobile and desktop resolutions.</translate>
<translate><!--T:44--> See also [[<tvar name=1>#How can I target mobile/desktop resolutions?</tvar>|#How can I target mobile/desktop resolutions?]].</translate>

<syntaxhighlight lang="css" style="overflow: auto; width: 44rem;">
/* <translate nowrap><!--T:114--> Elements with class <tvar name=1>foo</tvar> will have red text in all skins.</translate> */
.foo { color: red; }

/* <translate nowrap><!--T:115--> Override that element's color to green for the Vector skin only.</translate> */
body.skin-vector .foo { color: green; }

/* <translate nowrap><!--T:116--> Add a red border if the browser doesn't have JavaScript enabled.</translate> */
html.client-nojs .foo { border: 1px solid red; }

/* <translate nowrap><!--T:117--> Declare that same border as green for the Vector skin.</translate> */
html.client-nojs body.skin-vector .foo { border-color: green; }
</syntaxhighlight>

<syntaxhighlight lang="css" style="overflow: auto; width: 44rem;">
/* <translate nowrap><!--T:118--> This does not work; the 'body' element must be selected!</translate> */
.skin-vector .foo { background: orange; }

/* <translate nowrap><!--T:119--> These do not work, either; the descendant combinator must be used.</translate> */
body.skin-vector > .foo { background: orange; }
body.skin-vector ~ .foo { background: orange; }
html.client-nojs > body.skin-vector .foo { background: orange; }
</syntaxhighlight>

<translate>
== How do I use styles in MediaWiki messages? == <!--T:58-->
</translate>
<translate><!--T:59--> To prevent a malicious user from messing with the parts of the document outside the main content area, all CSS rules automatically get prefixed by the <tvar name=1><code>mw-parser-output</code></tvar> CSS class.</translate>
<translate><!--T:60--> If you use a TemplateStyles-based template outside of the content area (e.g. in the {{<tvar name=2>ll|Manual:Interface/Sitenotice</tvar>|sitenotice}}), you need to provide that class yourself, by wrapping the template in something like <tvar name=1><syntaxhighlight inline lang="html"><div class="mw-parser-output">…</div></syntaxhighlight></tvar>.</translate>

<translate>
== In which order do CSS styles override? == <!--T:45-->
</translate>
<translate><!--T:46--> Which CSS rule takes effect is controlled by [<tvar name=url>https://developer.mozilla.org/docs/Web/CSS/Guides/Cascade/Specificity</tvar> specificity] (roughly, the complexity of the selector - e.g. <tvar name=1><syntaxhighlight lang=css inline>div.foo { margin: 10px }</syntaxhighlight></tvar> is more specific than <tvar name=2><syntaxhighlight lang=css inline>.foo { margin: 5px }</syntaxhighlight></tvar>).</translate>
<translate><!--T:47--> In case of equal specificity, CSS styles that come later in the document override earlier styles.</translate>

<translate><!--T:48--> <tvar name=2>[[MediaWiki:Common.css]]</tvar>, other site scripts, user scripts and gadgets are loaded in the <tvar name=1>{{tag|head|open}}</tvar> section of the page.</translate>
<translate><!--T:49--> TemplateStyles stylesheets are loaded in the <tvar name=1>{{tag|body|open}}</tvar>, so they override site/user script and gadget rules with equal specificity, and in the case of two TemplateStyles rules, the second overrides the first.</translate>

<translate><!--T:50--> Note though that TemplateStyles rules are deduplicated: if the same stylesheet is referenced multiple times on the page, it is only inserted the first time.</translate>

<translate><!--T:51--> Note also that "later" has to do with document position, not load order.</translate>
<translate><!--T:52--> Gadgets add their CSS after the page has fully loaded, by manipulating the page with JavaScript; some add it on-demand when the user does some action such as clicking a button.</translate>
<translate><!--T:53--> Nevertheless, they add it to the head, so equally-specific CSS rules in the body get precedence over it.</translate>

<translate>
== How can Lua modules interact with styles? == <!--T:54-->

<!--T:55-->
TemplateStyles can be called from a Lua module using <tvar name=extag><code>[[Special:MyLanguage/Extension:Scribunto/Lua reference manual#frame:extensionTag|frame:extensionTag]]</code></tvar>.

<!--T:56-->
Example code is the following:
</translate>

<syntaxhighlight lang="lua" style="overflow: auto; width: 44rem;">
local p = {};

function p.templateStyle( frame, src )
    return frame:extensionTag( 'templatestyles', '', { src = src } );
end

return p;
</syntaxhighlight>

<translate>
== What anti-abuse features are provided? == <!--T:20-->

<!--T:21-->
The design choice to store CSS in separate pages was made in part to make integration with the standard anti-abuse toolset easy. TemplateStyles CSS pages have their own content model (<code>sanitized-css</code>) so changes to them can be tracked or controlled with <tvar name=1>{{ll|Extension:AbuseFilter}}</tvar>, using the <code>new_content_model</code> variable.

<!--T:22-->
CSS inclusion is tracked the same way as template transclusion, so you can see where a stylesheet is used via the "<tvar name=whatlinks>{{int|whatlinkshere}}</tvar>" option, see what stylesheets are used on a page under "<tvar name=pageinfo>{{int|Pageinfo-toolboxlink}}</tvar>" (and possibly on the edit screen, depending on what editor you use), and see what recent changes might be affecting a page using "<tvar name=relatedchanges>{{int|Recentchangeslinked}}</tvar>".

<!--T:23-->
TemplateStyles also leaves identifying information in the HTML code; to find out where a specific rule comes from, look at the page source, and the enclosing <tvar name=1>{{tag|style|open}}</tvar> tag will have an attribute like <code>data-mw-deduplicate="TemplateStyles:r123456"</code>, where 123456 is the revision ID of the stylesheet (viewable with [[Special:Diff]], for example).

== How were the decisions around TemplateStyles made? == <!--T:24-->

<!--T:25-->
The idea of including CSS with templates was proposed and accepted in a [[<tvar name=phab1>phab:T483</tvar>|request for comments]]. Technical details were pinned down in [[<tvar name=phab2>phab:T155813</tvar>|a second RfC]] and workflow details were expanded through a [[<tvar name=qa>Special:MyLanguage/Extension:TemplateStyles/Q&A</tvar>|user consultation]].

== Who is working on TemplateStyles? == <!--T:26-->

<!--T:27-->
TemplateStyles was originally a project of the <tvar name=1>{{ll|Wikimedia Reading Infrastructure team}}</tvar> (preceded by exploratory work [[User:Coren|Coren]] did as a volunteer), consisting of [[User:BJorsch (WMF)|Brad Jorsch]] (developer), [[User:BDavis (WMF)|Bryan Davis]] (manager) and [[User:Tgr (WMF)|Gergő Tisza]] (developer) at the time. People and responsibilities have since moved around; see the [[Developers/Maintainers|maintainers page]] for current ownership.

== Where do I report errors / ask for features? == <!--T:28-->

<!--T:29-->
Please [<tvar name=fileatask>https://phabricator.wikimedia.org/maniphest/task/edit/form/1/?tags=templatestyles</tvar> file tasks] under the TemplateStyles component in [[<tvar name=phab>Special:MyLanguage/Phabricator</tvar>|Phabricator]].

== Where can I see it in action? == <!--T:30-->
</translate>
<translate><!--T:31--> You can look at some [[<tvar name=examples>Help:TemplateStyles/examples</tvar>|curated examples]].</translate>
<!-- TODO https://de.wikipedia.beta.wmflabs.org/wiki/TemplateStyles https://de.wikipedia.beta.wmflabs.org/wiki/TableTest -->

<translate>
<!--T:32-->
The feature is enabled on all Wikimedia sites.

== Help with errors  == <!--T:79-->
</translate>

=== background-image ===
<translate><!--T:80--> If you receive the following error when trying to publish the changes to your CSS file:</translate>

<div style="padding: 0.5em; color: var(--color-base, #202122); background-color: var(--background-color-neutral-subtle, #f8f9fa); border: 1px dashed var(--border-color-emphasized, #202122); width: calc(60% + 2em); margin-left: 1em;">
<div class="cdx-message--error cdx-message cdx-message--block">
<span class="cdx-message__icon"></span><div class="cdx-message__content">{{int|templatestyles-error-bad-value-for-property|''$1''|''$2''|background-image}}</div>
</div>
</div>

<translate><!--T:81--> It could be that the <tvar name=1><code>url('...');</code></tvar> attribute given to <tvar name=2><code>background-image</code></tvar> is not pointing to a local resource.</translate>
<translate><!--T:82--> The parser only allows local resources (and rejects remote ones).</translate>
<translate><!--T:83--> Only URLs which point to resources at <tvar name=1><kbd>//upload.wikimedia.org/</kbd></tvar> are permitted, for example <tvar name=2><kbd>//upload.wikimedia.org/wikipedia/commons/8/83/MediaWiki-2023-button-proposal.svg</kbd></tvar> for the file at <tvar name=3>[[:File:MediaWiki-2023-button-proposal.svg]]</tvar>.</translate>
<translate><!--T:84--> These URLs can be obtained by using the URL address that links point to on <tvar name=1>{{ll|Wikimedia Commons}}</tvar> file pages.</translate>
<translate><!--T:85--> These links include those to "Original file" or any of the links to the file's "Other resolutions:" such as <tvar name=1><code>1,024 × 1,024 pixels</code></tvar>.</translate>

<translate>
== See also == <!--T:34-->
</translate>
* {{ll|Extension:TemplateStyles}} &ndash; <translate><!--T:35--> especially the [[<tvar name=caveatsection>Special:MyLanguage/Extension:TemplateStyles#caveats</tvar>|#Caveats]] section.</translate>
* [[w:Wikipedia:TemplateStyles|Wikipedia:TemplateStyles]] &ndash; <translate><!--T:68--> guideline page on English Wikipedia.</translate>

[[Category:Help{{#translation:}}]]