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[[Category:Notice and warning templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Notice and warning templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
This template is used on approximately 40,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage . Consider discussing changes on the talk page before implementing them.
Template:Resolved/See also, the smaller family of thread-level hatnote templates, similar to the above but with a box around them; any template above can be converted to one of those with {} Template:Table cell templates/doc, the family of table-specific templates that work only in tables; Category:Image with comment templates
If none of the listed categories currently exists, then a warning message is displayed when the page is being previewed: Template:Category see also if exists — no output, because none of the categories currently exists. This warning is displayed just below the "Preview" heading, and just above the page preview area. It is not displayed when ...
This parser function can be used to detect whether a template parameter is defined, even if it has been set to a false value. For example, to check whether the first positional parameter has been passed to a template (note that the strings "+" and "-" can be any two different non-whitespace strings):
An existence check before reading a file can catch and/or prevent a fatal error, for instance. For that reason, most programming language libraries contain a means of checking whether a file exists. An existence check can sometimes involve a " brute force " approach of checking all records for a given identifier, as in this Microsoft Excel ...
This template is used in system messages, and on approximately 56,000 pages. Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage .
This is a simple helper template, to be used in other templates. t displays a link to a category if that category exists; otherwise it just displays greyed-out plaintext. Optional display text may be added as a second parameter.