The comments from James0x57 led me to a github repo wherein he discusses this hack https://github.com/propjockey/css-sweeper https://github.com/propjockey/css-

The comments from James0x57 led me to a github repo wherein he discusses this hack https://github.com/propjockey/css-sweeper https://github.com/propjockey/css-sweeper > Space Toggle has been independently discovered a number of times > @anatudor probably the first to discover it - about 3 years ago! > @JamesOx57 in April 2020 which kickstarted development of augmented-ui v2 because it allows augs to be equipped without extra class names. > @DavidKPiano in June 2020 and instead of just space, he includes an empty comment and calls it prop-and-lock And now Lea Verou