CSS Units
Last updated: March 20, 2022
This is in the works! Would you like to help flesh it out? Let's do it!
General
https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Values_and_units
ch
Thoughts on that – and some key links https://meyerweb.com/eric/thoughts/2018/06/28/what-is-the-css-ch-unit/
em
Some history: https://en.wikipedia.org/wiki/Em_(typography)