Template documentationThis is a cascade-protection notice, mostly intended for near the top of the documentation pages of template that are subject to cascaded protection because of their transclusion in some other page, and which are expected to have that protection indefinitely.
While a similar template is automatically generated by the system from MediaWiki:Cascadeprotected as an editnotice when someone tries to edit ("view source") on such a template, they have to actually try that before they get any inkling that the template is protected because of cascading. By putting a notice also on the template's /doc page, this should forestall attempts to have the template's protection level reduced to template-editor level (such requests must always be declined in cases of cascade-protection).
Usage
Just add {{Cascade-protected template}} near the top of the template's /doc subpage (usually right below the {{documentation subpage}} header).
In the odd case that the cascade-protected page is not a template, |page= can be used to change the word, e.g. |page=interface page.
This template is not for temporary protection. Many pages get short-term cascade-protected because of transclusion from an article listed on the Main Page for a few days. We do not need to tag then untag 100+ templates with this notice during that period. Volunteer editorial time is Wikipedia's most precious resource, and WP is not BureaucracyPedia.
 | This template should not be used in citation templates such as Citation Style 1 and Citation Style 2, because it includes markup that will pollute the COinS metadata they produce; see Wikipedia:COinS. |
 | This template is used on approximately 812,000 pages, or roughly 18239% of all pages. To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them. |
Wikipedia uses two separate templates to generate tooltips. The {{abbr}} template is used to write an abbreviation (including an acronym or initialism) with its expanded meaning. It is a wrapper for the HTML element abbr>>...</abbr>. The {{tooltip}} template uses the span>>...</span> element to provide generic notes.
Only use {{abbr}} or abbr>> to mark up abbreviations (including acronyms and initialisms). Using it to generate tooltips elsewhere is a misuse of the underlying HTML and causes accessibility problems. For general-purpose tooltips, use {{tooltip}} instead.
Readers on mobile devices typically do not have a mouse to hover with, and so generally cannot see tooltip contents. As of 2023, more English Wikipedia page views occur on mobile than on desktop browsers.[1]
Usage
{{Abbr|text to display inline in the article|pop-up tip}}
Parameters
Two unnamed (positional) parameters (required) and three named parameters (optional):
|1=– the term to be explained; displays as text. Wiki markup is allowed but works more consistently when wrapping the template, see below for linking examples.|2=– the tooltip/pop-up (no wiki or html markup allowed). The popup is created by an HTMLtitle=attribute, so it cannot contain HTML (or markup that resolves to HTML when rendered). This includes simple things like''italics''.|class=– one or more CSS classes (space-separated if more than one)|id=– an HTML id must be unique on the entire page.|style=– CSS to apply to the displayed text (no effect on tooltip/popup). Any style values with embedded blanks must be single-quoted, e.g.|style=font-family: 'Times New Roman', serif;
Examples
| Markup | Renders as |
|---|---|
{{abbr|LSD|Louisiana School for the Deaf}}
|
LSD |
When hovering over the text "LSD", something like Louisiana School for the Deaf will appear as a tooltip in desktop browsers. Mobile devices may display a dotted line or other visual indicator of abbreviation, but will not provide the tooltip. No screen readers for the visually impaired will read the expansion by default; some provide an optional setting to read the expansion aloud.
Abbr examples
| Markup | Renders as |
|---|---|
High school students staying overnight on the Louisiana School for the Deaf (LSD) campus can phone their parents using an American Sign Language (ASL) interpreter. Although fluent in {{abbr|ASL|American Sign Language}}, most students at {{abbr|LSD|Louisiana School for the Deaf}} prefer texting their parents directly.
|
High school students staying overnight on the Louisiana School for the Deaf (LSD) campus can phone their parents using an American Sign Language (ASL) interpreter. Although fluent in ASL, most students at LSD prefer texting their parents directly. |
In the above example, each abbreviation is first expanded in the body text within parentheses. The template provides an additional way for some users to access the meaning later in the text. See MOS:ABBR for more information.
| Markup | Renders as |
|---|---|
High school students staying overnight on the {{abbr|LSD|Louisiana School for the Deaf}} campus can phone their parents using an {{abbr|ASL|American Sign Language}} interpreter. Although fluent in {{abbr|ASL|American Sign Language}}, most students at {{abbr|LSD|Louisiana School for the Deaf}} prefer texting their parents directly.
|
High school students staying overnight on the LSD campus can phone their parents using an ASL interpreter. Although fluent in ASL, most students at LSD prefer texting their parents directly. |
In the above example, all abbreviations are expanded via the template. This is discouraged because it is the only way for users to access the meaning. Users reading on a mobile device, reading a printout, or listening to a screen reader will likely not have access to the full meaning.
| Markup | Renders as |
|---|---|
High school students staying overnight on the {{abbr|LSD|Louisiana School for the Deaf}} campus can phone their parents using an {{abbr|ASL|American Sign Language}} {{abbr|interpreter|Although fluent in ASL, most students at LSD prefer texting their parents directly.}}.
|
High school students staying overnight on the LSD campus can phone their parents using an ASL interpreter. |
In the above example, all abbreviations are expanded via the template, and an entire sentence is embedded via the template. It is the only way for users to access the meaning. A user reading on a mobile device, reading a printout, or listening to a screen reader will likely not have access to the full meaning of the abbreviation and will have no clear indication that the embedded footnote exists.
Tooltip example
| Markup | Renders as |
|---|---|
[[WP:COI|{{tooltip|conflict of interest|in the specific sense employed in Wikipedia policy}}]]
|
|
Tooltips should not be used within the body text of an article if possible (see MOS:NOTOOLTIPS). Generic tooltip notes are not a substitute for footnotes and are intended to be used for navigational and other secondary features where space is limited. See Template:Glossary link or Template:Cite book/doc for practical examples.
Linking
 | Preferably use {{Abbrlink}} instead. |
To wiki-link the abbreviation being marked up by this template, wrap the template in the link, or the tooltip will not appear in some browsers.
| Compatibility | Markup | Renders as |
|---|---|---|
| Compatible | [[Knockout#Technical knockout|{{abbr|TKO|technical knockout}}]]
|
TKO |
| Less compatible | {{abbr|[[Knockout#Technical knockout|TKO]]|technical knockout}}
|
TKO |
Accessibility and validity
The {{Abbr}} template is intended only for use with abbreviations (including acronyms and initialisms).
The Web Content Accessibility Guidelines contain guidelines for using the abbr>> element generated by this template; see section H28: Providing definitions for abbreviations by using the abbr and acronym elements. HTML specifications (both those of the W3C and WHATWG) strictly define the abbr>> element as reserved for markup of abbreviations. Abusing it for mouse-over tooltips breaks our semantic markup and makes our content invalid HTML (it will falsely pass a basic automated validator test because such a tool can't tell that the logical application of the data to the structure isn't correct, only that tags are nested properly).
Redirects
The following template names will redirect to {{Abbr}}:
{{Tooltip}} is a separate template sharing the same documentation.
Maintenance categories
Template data
TemplateData for Abbr
An abbreviation or acronym with a tooltip displayed on mouse-over.
| 参数 | 描述 | 类型 | 状态 | |
|---|---|---|---|---|
| Term | 1 | Shows as text | 单行文本 | 必需 |
| Meaning | 2 | Shows as a mouse-over tooltip; do not use markup | 字符串 | 必需 |
| CSS | style | applies the specified CSS directives to the content of parameter 1 | 字符串 | 可选 |
| Class | class | Adds a one or more CSS classes | 字符串 | 可选 |
| ID | id | Adds an HTML id (must be unique in the page) | 字符串 | 可选 |