Your source text will be altered by many browsers (a copy-paste will not give it in its original form):
In:{{Allcaps|The ''Name'' of the Game}}
Out:The Name of the Game
Pasted: Incorrectly as "THE NAME OF THE GAME" or correctly as "The Name of the Game", depending on browser.
You can use this template to control the display of the variable output of magic words and of other templates.
Technical notes
This template is a wrapper for <span class="allcaps" style="text-transform: uppercase;">...</span> – This makes letter appear to be uppercase, but retain their original case when copied.
This template will corrupt HTML character entities, such as ; if a special character much be used in its content, it must be encoded as a decimal character references (e.g.  ).
Preferably do not subst: it because the result will not be an uppercase source text but the original text wrapped in HTML code making it appear uppercase, so it is more efficient for this purpose to simply rewrite the text in uppercase, or use "{{subst:uc: ...text...}}" to store uppercase text into the page. You can also use the template in edit mode, then copy-paste the result from preview mode into the editing field, replacing the original material and the template.
Diacritics (å, ç, é, ğ, ı, ñ, ø, ş, ü, etc.) are handled. However, because the job is performed by each reader's browser, inconsistencies in CSS implementations can lead to some browsers not converting certain rare diacritics.
Use of this template does not generate any automatic categorization. As with most templates, if the argument contains an = sign, the sign should be replaced with {{=}}, or the whole argument be prefixed with 1=. And for wikilinks, you need to use piping. There is a parsing problem with MediaWiki which causes unexpected behavior when a template with one style is used within a template with another style.
There is a problem with dotted and dotless I. {{Lang|tr|{{Smallcaps|ı i}}}} gives you ı i, although the language is set to Turkish.
Do not use this inside Citation Style 1 or Citation Style 2 templates, or this template's markup will be included in the COinS metadata. This means that reference management software such as Zotero will have entries corrupted by the markup. For example, if {{smallcaps}} is used to format the surname of Bloggs, Joe in {{cite journal}}, then Zotero will store the name as <span style="font-variant:small-caps;">Bloggs</span>, Joe. This is incorrect metadata. If the article that you are editing uses a citation style that includes small caps, either format the citation manually (see examples below) or use a citation template that specifically includes small caps in its formatting.
No conversion, small-caps display, mixed case. No font size change (acronyms are unaffected). Common mixed-case heading style (not in Wikipedia). Uses: Rendering publication titles in citation styles that require them in small-caps.
No conversion, small-caps display, mixed case. Slightly reduced font size. This is the conventional display of smallcaps for acronyms/initialisms in modern book typography. Other uses: Unicode character names.
Warning:Use of the {{Smallcaps all}} template will corrupt upper- or mixed-case data, by permanently converting it to lowercase for users of many browsers. Lowercase conversion, small-caps display, all uppercase. The size of lowercase letters. Uses: Stressed syllables (in {{Respell}}); and???.
{{Smallcaps all|UNICEF}} and 312 {{Smallcaps all|BCE}}
No conversion, all-caps display. The size of uppercase letters. Uses: Text is displayed in all caps, while copy-and-paste preserves the capitalization of the original text.
No conversion, all-lowercase display. The size of lowercase letters. Uses:???.
{{nocaps|UNICEF}} and 312 {{nocaps|BCE}}
{{nocaps|Mixed Case}}
UNICEF and 312BCE Mixed Case
UNICEF and 312 BCE Mixed Case
See also
{{R from other capitalisation}} – for categorizing Redirects from titles to article (or other pages) where the redirect is just a different capitalization