CSS properties for aligning boxes within their container. Allows for true vertical centering among other features.
CSS Box Alignment is now on the Microsoft Edge backlog. You can track the status at https://dev.modern.ie/platform/status/boxalignment/
@Martinspire You can get this with Flexbox, but you also get a slew of other behaviors (elements getting aligned and stretched and whatnot) that you may not want.
This extracts one feature from Flexbox (and to some extent table cells) and makes it a general-purpose one. Like webdesigners have wanted for, roughly, 10 years.
Isn't this already supported via Flexbox? (display: flex, etc)