Template:Warningbox

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 |#default=Template:Warningbox/doc

}}|action=history}} history]] [[[:Template:Purge]]]

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 |#default=Template:Warningbox/doc

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  |sandbox|testcases=
  |#default=
   {{#switch:Template
    |Template
    |User=
     {{#ifexist:Template:Warningbox/sandbox
      |This template has a sandbox ([{{fullurl:{{#rel2abs:/sandbox}}|action=edit}} edit]) {{#ifexist:Template:Warningbox/testcases
        |and testcases ([{{fullurl:{{#rel2abs:/testcases}}|action=edit}} edit])}} for editors to experiment.
      |{{#ifexist: Template:Warningbox/testcases
       |This template has testcases ([{{fullurl:{{#rel2abs:/testcases}}|action=edit}} edit]) for editors to experiment.}}
 }}}}}}

{{#if:||{{#ifexist:{{#switch: Warningbox

 |sandbox|testcases={{ #rel2abs: ../doc }}
 |#default=Template:Warningbox/doc

}}|{{ {{#switch: Warningbox

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 |#default=Template:Warningbox/doc

}}}}}}}}

Template usage

The template can be invoked as follows:

{{warningbox
| '''Title''' Text [[Link1]], [[Link2|Another Link]]<br>This is a paragraph with some warning message for the user.
}}

...which produces the following warning box:

WARNING: Title Text Link1, Another Link This is a paragraph with some warning message for the user.

{{#ifeq:Template||}}