Sticking with client-side solutions, you could wrap your template "T" in a classed <div> like so:

<div class="template-T"> Your content </div>

then insert a rule into your MediaWiki:Common.css:

.template-T ~ .template-T, .template-T ~ * .template-T { display: none; }

By combining child and general sibling selectors you should be able to cover most cases.

Il 03/03/2015 17:27, Daniel Barrett ha scritto:

Is there a way to construct a template that appears on a page only once, even if it's transcluded multiple times?

For example, if the template "T" contains the word "foo", then:

{{T}} {{T}} {{T}} {{T}}

would display as "foo", not "foo foo foo foo".

My use case is that "T" contains a navigation menu. I want to make sure it never appears more than once on any page.

Thanks, DanB

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