With that said, they lose the plot a bit when the iPhone X's safe area adds unnecessary padding outside of the notch, and then double down on that mistake when they talk about their brand new `min()` and `max()` functions.
These functions aren’t Apple’s and they're not new.
There was a proposal a year ago to add them back to CSS, which means they were existed in some W3C or WHATWG specification proposal before that: https://github.com/w3c/csswg-drafts/issues/544
The link in the article will take you to the current specification: https://drafts.csswg.org/css-values/#calc-notation