Today I Learned: Footnotes in feed readers
There鈥檚 a de facto convention for rendering footnotes in HTML that enables feed readers to give them special treatment, e.g. NetNewsWire and Feedbin display them inline if you select the numbered footnote popup. Simon Willison, referencing Chris Coyier, both with screenshots: I found this code in the NetNewsWire source (it鈥檚 MIT licensed) which runs against elements matching this CSS selector: sup > a[href*='#fn'], sup > div > a[href*='#fn'] So any link with an href attribute containing #fn that is a child of a <sup> (superscript) element. ...