Brontekst bekijken van Sjabloon:CheckElement/doc

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Template that returns an error message if the first argument is not valid for use with other [[:Category:Nuclide templates|nuclide templates]] helper templates.

== Usage ==
<!-- note to editors: "nocategory=true" is added to the examples, to prevent this page from showing up on the Category:Pages_with_incorrect_nuclide_templates_use page. -->
When using a string that is not a valid element name or symbol or "x" or "element", an error message is returned, like so:
*<code><nowiki>{{CheckElement|C}}</nowiki></code> will return "{{CheckElement|C|nocategory=true}}"
*<code><nowiki>{{CheckElement|Carbon}}</nowiki></code> will return "{{CheckElement|C|nocategory=true}}"
*<code><nowiki>{{CheckElement|Blablabla}}</nowiki></code> will return "{{CheckElement|Blablabla|nocategory=true}}"

The "link=yes" argument is also supported; if the element name or symbol has no associated link, an error message is returned, like so:
*<code><nowiki>{{CheckElement|link=yes|C}}</nowiki></code> will return "{{CheckElement|link=yes|C|nocategory=true}}"
*<code><nowiki>{{CheckElement|link=yes|Carbon}}</nowiki></code> will return "{{CheckElement|link=yes|Carbon|nocategory=true}}"
*<code><nowiki>{{CheckElement|link=yes|X}}</nowiki></code> will return "{{CheckElement|link=yes|X|nocategory=true}}"

When using a common name for an element that goes against the [[Wikipedia:WikiProject_Chemicals/Style_guidelines#Element_names|Wikipedia style guide for element names]], a warning message will be returned. There are currently three such names:
*<code><nowiki>{{CheckElement|Aluminum}}</nowiki></code> will return "{{CheckElement|Aluminum|nocategory=true}}"
*<code><nowiki>{{CheckElement|Sulphur}}</nowiki></code> will return "{{CheckElement|Sulphur|nocategory=true}}"
*<code><nowiki>{{CheckElement|Cesium}}</nowiki></code> will return "{{CheckElement|Cesium|nocategory=true}}"

This template can be used in other templates to check for error before calling other templates that require a valid element or symbol like so:

<pre>
{{#ifexpr:{{CheckElement|{{{element argument}}}|link={{{link|}}} }}
 | {{Element|{{{element argument}}} }} is the best element in the whole world
 | Bad input for element name or symbol
}}
</pre>

== See also ==
{{Periodic table templates}}

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{{DEFAULTSORT:Check Element}}
[[Category:Nuclide templates]]

[[bn:টেমপ্লেট:CheckElement]]
[[es:Plantilla:ComprobarElemento]]
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