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How to manage this template's visibility

To show this template in its...

• collapsed state (i.e. hidden apart from its titlebar), add the parameter |state=collapsed
• expanded (i.e. fully visible) state, add the parameter |state=expanded
• collapsed state but only if there is another template of the same type on the page, add the parameter |state=autocollapse

• Unless set otherwise (see the state parameter within the template's code), the template's default state is "autocollapse".

This is the template sandbox page for Template:Collapsible option (diff). See also the companion subpage for test cases.

This template is used on approximately 142,000 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}} is a utility template that 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The factual accuracy of this template may be compromised due to out-of-date information. The reason given is: Removed in 2015. Please help update this template to reflect recent events or newly available information. Relevant discussion may be found on the talk page. (December 2024)

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):

This template's initial visibility currently defaults to autocollapse, meaning that if there is another collapsible item on the page (a navbox, sidebar, or table with the collapsible attribute), it is hidden apart from its title bar; if not, it is fully visible.

To change this template's initial visibility, the |state= parameter may be used:

• {{Collapsible option|state=collapsed}} will show the template collapsed, i.e. hidden apart from its title bar.
• {{Collapsible option|state=expanded}} will show the template expanded, i.e. fully visible.

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's state argument – 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. (For more information, see Misplaced Pages:Manual of Style § Scrolling lists and collapsible content.) 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}}
• Collapsing tables and more

• Template sandboxes