To manage this template's visibility when it first appears, add the parameter ...
|state=collapsed.......... to show the template in its collapsed state, i.e. hidden apart from its titlebar (e.g. ((BASEPAGENAME |state=collapsed)));|state=expanded............ to show the template in its expanded state, i.e. fully visible (e.g. ((BASEPAGENAME |state=expanded)));|state=autocollapse.... to show the template in its collapsed state but only if there is another template of the same type on the page (e.g. ((BASEPAGENAME |state=autocollapse))).
Unless set otherwise (see the state parameter in the template's code), the template's default state is autocollapse.
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((Collapsible option)) is a utility template provides a standardised message for transclusion on template documentaion pages for templates whose collapsibility may be managed by the parameter |state=.
It can be used on either the template page itself (wrapped within <noinclude>...</noinclude> tags), but it is almost always better to place it in the template's ((documentation subpage)).
Indicating optional use of state name
The |state= parameter used to manage collapsible templates need not always be named explicitly, i.e. ((Template name|state)) can be the same as ((Template name|state=state)), if the template is coded that way. To indicate this in the ((Collapsible option)) message, add the parameter |statename=optional. This modifies the message so that it reads (if it were used for itself):
To manage this template's visibility when it first appears, add the parameter ...
|collapsed.......... to show the template in its collapsed state, i.e. hidden apart from its titlebar (e.g. ((Collapsible option |collapsed)));|expanded............ to show the template in its expanded state, i.e. fully visible (e.g. ((Collapsible option |expanded)));|autocollapse.... to show the template in its collapsed state but only if there is another template of the same type on the page (e.g. ((Collapsible option |autocollapse))).
Unless set otherwise (see the state parameter in the template's code), the template's default state is autocollapse.
This possibility is enabled by including:
(({1|))}as part of a collapsible template's|state=parameter – for instance, as|state=(({state|(({1|))))))or|state=(({state|(({1|<noinclude>expanded</noinclude>)))))), etc.<noinclude>,<includeonly>as part of a collapsible template'sstateargument – for instance, as|state=(({state<includeonly>|collapsed</includeonly>))}
If, however, the template includes collapsible sections within itself (e.g. ((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 |state= should be retained.
Changing the default state
To change the default state ((Collapsible option)) uses, add the parameter |default=collapsed or |default=expanded accordingly. To restore the default, remove any |default= previously included.
The |default=collapsed option must not be used in main article content in mainspace, e.g. to hide tables of information, or to cram extraneous details into infoboxes. This option is permissible in navboxes, which are not part of the article content per se.
Slashes and the nobase parameter
If the template name given to ((Collapsible option)) includes a forward-slash (virgule) character – / – then the parameter |nobase= (set to on, true, etc.) will need to be added so that the name is displayed correctly (i.e., so that ((PAGENAME)) rather than the default ((BASEPAGENAME)) is used to display it).
See also
- ((Navbox documentation)), which includes this template
- ((Collapsible lists option))
- ((Collapsible sections option))
- Help:Collapsing