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Terence Eden poked around with a way to do footnotes using the <details>/<summary> elements. I think it’s kind of clever. Rather than a hyperlink that jumps down to explain the footnote elsewhere, the details are right there next …

We’ve mentioned before just how great the <details> and <summary> elements are. They’re great for quickly making accordions that are accessible to touch, mouse, and keyboard input:

<details> and <summary> can even be used to play/pause gifs…

There are special superset number characters that are sometimes perfect for footnotes. Here they are:

¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹

I generally prefer to superscript the number myself, like:…