"svelte-markdown" is the name.

It could probably be tweaked or forked to display things differently, but I don't know much about these formatting quirks. 

 They work okay as plain text, but they'd be nice as an internal link. 

 https://www.npmjs.com/package/svelte-markdown?activeTab=readme

Seems to allow for custom renderers.

https://www.markdownguide.org/extended-syntax/#footnotes