Wiki Team/Guide/Collapsible content

See https://www.mediawiki.org/wiki/Manual:Collapsible_elements.

The default toggle text is Expand/Collapse.

The Header remains visible
This content is hidden
at first load time

If one wishes something different, data-collapsetext= and data-expandtext= may be set as in this example:

The Header remains visible
This content is hidden
at first load time