Template:Collapsible option
Initial visibility
To set the template's initial visibility, the |state= parameter may be used:
|state=collapsed: {{BASEPAGENAME|state=collapsed}} to show the template collapsed, i.e., hidden apart from its title bar|state=expanded: {{BASEPAGENAME|state=expanded}} to show the template expanded, i.e., fully visible|state=autocollapse: {{BASEPAGENAME|state=autocollapse}}- shows the template collapsed to the title bar if there is a {{navbar}}, a {{sidebar}}, or some other table on the page with the collapsible attribute
- shows the template in its expanded state if there are no other collapsible items on the page
If the |state= parameter is not set, the template's initial visibility is taken from the |default= parameter in the template. For this template, that currently evaluates to autocollapse.
 | This template is used on 140,000+ pages. To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them. |
{{Collapsible option}} provides a standardised message for transclusion on the pages of collapsible templates whose collapsibility may be managed by the parameter state.
It may be used on either the template page itself (wrapped within <noinclude>...</noinclude> tags) or on 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}}. 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):
Initial visibility
To set the template's initial visibility, the |state= parameter may be used:
|state=collapsed: {{Collapsible option|state=collapsed}} to show the template collapsed, i.e., hidden apart from its title bar|state=expanded: {{Collapsible option|state=expanded}} to show the template expanded, i.e., fully visible|state=autocollapse: {{Collapsible option|state=autocollapse}}- shows the template collapsed to the title bar if there is a {{navbar}}, a {{sidebar}}, or some other table on the page with the collapsible attribute
- shows the template in its expanded state if there are no other collapsible items on the page
If the |state= parameter is not set, the template's initial visibility is taken from the |default= parameter in the template. For this template, that currently evaluates to autocollapse.
{{{1|}}}as part of a collapsible template'sstateparameter – 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>}}}
|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.
nobase
If the template name given to {{Collapsible option}} includes a (forward-)slash character ("/"), 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).