It's also an awful term to describe a complex ecosystem of tools. Many of them are just fancier CSS pre-processors with automatic classname generation.
If you use "CSS-in-JS" to generate CSS, it's now now "zero runtime CSS-in-JS" according to that article? 
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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& Web Standards TL; Blink API OWNER
Named PWAs w/
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