View source for Collapsible

<includeonly>{</includeonly><includeonly>{{!}} style="background-color:#1d1d1d; width: {{#if: {{{width|}}}|{{{width}}}|85}}%;" 
{{!}}
<div class="mw-collapsible mw-{{#ifeq:{{{collapsed|}}}|false|expanded|collapsed}}>
{{#if: {{{header|}}}|==={{{header|}}}===}}
{{{1|}}}
<div class="mw-collapsible-content">
{{{2|}}}
</div>
{{!}}</includeonly><includeonly>}</includeonly>
<noinclude>
Creates a box with a collapsible segment.
<pre>
{{Collapsible
|width=85
|header=<header title>
|collapsed=true
|<text outside collapsible area>
|<text within collapsible area>
}}</pre>

== Parameters ==
;width
Sets the box width to a percentage of the site width. Defaults to 85%.
;header
When set, creates a level 3 header within the box, but outside the collapsible segment. 
;collapsed
Starts in the expanded state when set to '''false'''. Defaults to the collapsed state when not set or set to any other value, including '''true'''.
;unnamed parameter 1
Holds text outside the collapsible segment, this text will be visible in both expanded and collapsed states
;unnamed parameter 2
holds the text within the collapsible segment. This text will be hidden when the segment is collapsed. Headers in this segment will not work from the Table of Contents when the section is collapsed.
</noinclude>