Editing Template:Collapsible option/doc (section)

===Indicating optional use of {{samp|state}} name===
{{Update|inaccurate=yes|date=December 2024|reason=Removed in [[Special:Diff/657041913|2015]]|talk=Broken_statename_parameter}}
The {{para|state}} parameter used to manage collapsible templates need not always be named explicitly, i.e. {{tnull|{{var|Template name}}{{!}}{{var|state}}}} can be the same as {{tnull|{{var|Template name}}|state{{=}}{{var|state}}}}, if the template is coded that way. To indicate this in the {{tnull|Collapsible option}} message, add the parameter {{para|statename|optional}}. This modifies the message so that it reads (if it were used for itself):

<div style="clear:both;margin:1.0em 0;background:whitesmoke;">
{{Collapsible option |statename=optional}}
</div>

This possibility is enabled by including:
*<code><nowiki>{{{1|}}}</nowiki></code> as part of a collapsible template's {{para|state}} parameter{{spaced ndash}}for instance, as {{para|state|<nowiki>{{{state|{{{1|}}}}}}</nowiki>}} or {{para|state|<nowiki>{{{state|{{{1|<noinclude>expanded</noinclude>}}}}}}</nowiki>}}, etc.
*<code><nowiki><noinclude></nowiki></code>,<code><nowiki><includeonly></nowiki></code>as part of a collapsible template's <code>state</code> argument{{spaced ndash}}for instance, as {{para|state|<nowiki>{{{state<includeonly>|collapsed</includeonly>}}}</nowiki>}}
If, however, the template includes collapsible sections within itself (e.g. {{tlx|Navbox with collapsible groups}}), then enabling this possibility may introduce ambiguity as regards what is to be collapsed or expanded. In those instances, therefore, the requirement to use {{para|state}} should be retained.