Did you add class="collapsible" to the custom tab?

wiki.nihiltres wrote:

Adding class="collapsible" to the custom tab doesn't seem to help. The problem seems to be something involving the $settings variable, but I don't understand the code well enough to analyze the problem further.

TypeError: 'null' is not an object (evaluating '$settings.expandedContainer')

load.php:407

mhershberger wrote:

Unassigning default assignments. http://article.gmane.org/gmane.science.linguistics.wikipedia.technical/54734

What are steps to reproduce this? How to add a custom tab?

This certainly works now, even if it didn't work before.

Tested using this JS:

mw.util.addPortletLink('p-views', '#', 'Test tab', 'ca-test', null, null, 'ca-history')
$('#ca-test').addClass('collapsible')

The resulting tab collapses just like it should.