ct-css-performance-hints-via-injected-stylesheet-alone 
CSS - Tricks
OCTOBER 5, 2021
This is some bonafide CSS trickery from Harry that gives you some generic performance advice based on what it sees in your <head> element. Well, that’s bad , because the script is blocked by CSS likely unnecessarily. Perhaps some sophisticated performance tooling software could tell you that. A CSS selector!
CSS - Tricks
OCTOBER 5, 2021
This is some bonafide CSS trickery from Harry that gives you some generic performance advice based on what it sees in your <head> element. Well, that’s bad , because the script is blocked by CSS likely unnecessarily. Perhaps some sophisticated performance tooling software could tell you that. A CSS selector!
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