On a main page this opens on the desktop, displays opened on mobile:
_________On site________
<div class="toccolours mw-collapsible mw-collapsed" "style="width:40em;">
This text is a heading
<div class="mw-collapsible-content">STUFF TO DO:
# In email to BH Tech support, note Recaptcha requires json.js
# Build quick front page with collapsible elements for mobile use
# Build pages for committees
# Build editable pages for event suggestions
# Build page with Google Maps to show membership location by town
# Mediawiki IFrame install Calendars and Google Docs
Build an administrators site
</div>
</div>
</div>
______End on site______
No reason to believe it's a cache-clear issue. Appreciate help. Thx