It seems to be a global gadget then since I'm seeing it while anonymous. How is this happening and who do I talk to rectify this?

There are no such things as global gadgets. What wiki is this on?

The switcher gadget on the English Wikipedia doesn't have any CSS, it's pure JS: https://en.wikipedia.org/wiki/MediaWiki:Gadget-switcher.js

But it shouldn't be loaded because it doesn't have targets set...hrm.

Ignore me, it does:

switcher[ResourceLoader|default|targets=desktop,mobile]|switcher.js

So is the problem that you don't want the gadget running on mobile? That seems like something to ask for on-wiki.

Thanks @Legoktm I've asked on wiki to see what to do here https://en.m.wikipedia.org/wiki/MediaWiki_talk:Gadget-switcher.js

Er, hold on a second. That gadget doesn't have any styles. Why is it in a <link> tag?

Seems this module is working on mobile but doesn't have any associated styles so yes.. very bizarre this is in the link tag. Same for desktop site.

Have updated the description - it seems we include empty modules in that link tag and each gadget has a corresponding style module loaded in the head. We may want to re-evaluate this.

It's most likely in the <link> because it's added with addModuleStyles(). We currently don't distinguish style-only gadgets from regular gadgets.

For style-only gadgets, they should always be in the <link> because that tag is cached in the html for 30 days. If it's enabled site-wide it should consistency show up on pages if/when styles are added to the gadgets.

The bottom-line issue here is that gadgets are currently always loaded with addModules() and addModuleStyles() which is a RL design violation we currently tolerate. We should probably make that an option in the gadget definition (either static styles or dynamic, defaulting to dynamic module js/css).