Ask HN: Any Useful Web Components?

I am still undecided what to think about web components.

Are there some useful ones out there?

I would expect a nice web component to be a single JS file which I can import as a module like ...

<script src="some_awesome_component.js" type=module></script>

... and then I have a useful new html element.

I have yet to see something like that. Any good ones out there?