[https://www.mediawiki.org/wiki/Manual:Collapsible_elements Mediawiki link on Collapsible elements]
This is the codefor example 1:
<pre>
<div class="toccolours mw-collapsible" style="width:400px">
</pre>
This is outputfor example 1
<div class="toccolours mw-collapsible" style="width:400px">
This text is collapsible.
</div>
This is the code for example 2:
<pre>
{| class="mw-collapsible mw-collapsed wikitable"
! The header || remains visible
|-
| This content || is hidden
|-
| at first || load time
|}
</div>
</pre>
This is output for example 2
{| class="mw-collapsible mw-collapsed wikitable"
! The header || remains visible
|-
| This content || is hidden
|-
| at first || load time
|}
[[Category:Testing]]