I love the CSS spec’s take on supporting text-decoration: blink.
It may as well say,’Support it, don’t support it, nobody here gives a shit. Probably don’t make stuff blink though. We all know what a mess <blink> was.’
(Even before deprecation, none of the major browsers supported the value.)
The relevant bit of CSS Text Decoration Module Level 4: https://drafts.csswg.org/css-text-decor-4/#text-decoration-line-property