[derefr]

Rather than linking to another page, you can link elsewhere within the same page, using fragment URI-refs. Write your asides as long footnotes, and then link to the footnotes.

(Or, go further, and split your article into a set of related articles all on the same page, with one “main” article and then several “supporting” articles that you can read or ignore. A non-editable Tiddlywiki, basically.)

(Or you could go even further and make your article into a Twine game. But that’s just getting silly.)

[bmn__]

https://developer.mozilla.org/docs/Web/HTML/Element/aside

Consider using this mark-up and displaying the document portion in the margin, or as a float inset into the article. Footnotes inhibit the flow of reading because they require navigating away from where the reader's eyes were.