earlier replies
Replying to @BrendanEich @justinfagnani @lawnsea @paul_irish @_munter_ @samccone
Indeed if everything's a component then life is better; still some global CSS rules.
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totally, but this is more tractable than knowing all rules that can be above the fold @BrendanEich @paul_irish @_munter_ @samccone
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<link async> please. For optional styles like Google Fonts embed code.
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turned this convo into an AMP PR github.com/ampproject/amphtm…

Introduce timeout for font stylsheets in AMP. by cramforce · Pull Request #5911 · ampproject/amphtml

All external stylesheets in AMP have the sole purpose of loading fonts. While browsers have a timeout for fonts (3s or lower), they don't have a similar timeout for stylesheets. Thus a user wil...

github.com
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"As far as I know there is no way to tell whether a stylesheet has loaded." Need a w3c CSSOM spec bug? CC'ing @davidbaron.
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yeah, you can register a load event but by that time it may have fired already. Complete or readyState prop needed @davidbaron
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