↳ In reply to

issue 8930 of GitHub project “csswg-drafts”

Regarding History:
> The earliest such proposal I could find was this one from 2009. (https://lists.w3.org/Archives/Public/www-style/2009Apr/0225.html)

This sounded familiar (as in I thought I had proposed something similar a while ago), and it turns out I had proposed exactly a "tooltip pseudo-element" nine years earlier 🙈😭


Note that the year 2000 was before the WG switched to the "::" prefix for pseudo-element selectors, so all pseudo-elements and pseudo-classes used the single ":" prefix.

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