The default style class used to find collapsible elements is collapsible. This can be changed by configuring the extension.
For these examples the extension is configured to use the className: myCustomClass.
Given the spec reads like this:
<div id="id" class="myCustomClass">This should be collapsible.</div>
When run the output is enhanced with the needed code for the collapse feature:
<div class="toggleContainer"> <a href="javascript:Collapsible.collapseExpand('id');">Expand / Collapse</a> <div id="id" class="myCustomClass" collapsed-height="1.5" collapsed-height-unit="em" style="height: 1.5em;">This should be collapsible.</div> </div>
Given spec reads like this:
<div id="id" class="collapsible">This should not be collapsible.</div>
When run it stays untouched:
<div id="id" class="collapsible">This should not be collapsible.</div>