Plugins in TiddlyWiki5 can be used to distribute optional components that customise and extend wiki. You can install them from the official plugin library or from community sites.
Internally, plugins are a bundle of tiddlers packaged together as a single tiddler that can be installed, copied, disabled or deleted as a unit. The individual tiddlers within a plugin appear as shadow tiddlers.
Plugins can contain ~JavaScript modules, style sheets, and templates. Plugins can also be used to distribute ordinary text, images or any other content.