An excerpt from Page 18 Third Edition, about Async attribute:
"The purpose of specifying an async script is to indicate that the page need not wait for the script to be downloaded and executed before continuing to load"
I have found a couple of resources/articles that show that the page does need to wait for async scripts to be executed (not downloaded) to continue the parsing:
source 1:
http://www.growingwiththeweb.com/201...ttributes.html
source 2:
https://m.genbetadev.com/javascript/...defer-vs-async
So, does async scripts block the parsing when being executed, or not?
Thanks!