Your daily frequent11y newsletter, brought to you by @ChrisBAshton:

Semantic sidenotes for the web

• Article (or video) by UI designer Koos Looijesteijn, describing ‘sidenotes’ that have been in print media for centuries, and the difficulty in representing them in HTML. His solution is a <span> containing a <label> that can be clicked to expand a corresponding <small> on mobile, or that highlights the text at the side on desktop. At publish time it required JS but now appears to have been refactored to be CSS-only, using clever checkbox logic. By the author’s admission, it’s ugly, and we should campaign for a native solution instead.

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