i'm sure using defer for scripts can be useful coz it's one of google pagespeed recommendation...
i recently find a link when searching about defer and i think it's can be useful, the author say css and js file loaded after page loading if we use this script.. so here is the link
also i'm sure you do your best :)
thanks for respond
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Hamed.T on "[Plugin: Autoptimize] defer loading of javascript"
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