Board Thread:Support Requests - Getting Technical/@comment-24665976-20151217183639/@comment-1757994-20151217195949

In the article:  some spoiler text

In your CSS (probably MediaWiki:Common.css):  .spoiler { background-color: #fff; color: #fff; border: 1px dotted #000; }

.spoiler:hover { background-color: #fff; color: #000; }

Be aware that it won't work for mobile, because Wikia ignores CSS for mobile. The text won't be hidden in mobile.

Change the class name, colors, border, etc., to whatever you want, but that's how you can do it.