Topic on Project:Support desk

No ability to expand/hide, no button

http://skrinshoter.ru/s/220517/sLJBX9eV

The template was taken here https://ru.wikipedia.org/wiki/Шаблон:Сокрытие

I installed myself here http://wiki-evan.zzz.com.ua/index.php?title=Шаблон:Сокрытие

Tell me, please, why it does not work ː((

You also need the CSS and JS that enables collapsible div system that this depends on. It is in their https://ru.wikipedia.org/wiki/MediaWiki:Common.js and https://ru.wikipedia.org/wiki/MediaWiki:Common.css files

I copied completely earlier already these css and js does not work

There are JavaScript errors. If you open the developer console (hit F12 in your browser) you'll see the error on the console: ReferenceError: importScript is not defined

For an easy workaround, you should enable $wgIncludeLegacyJavaScript. However I recommend to adapt your JavaScript to not depend on this legacy code.