Great post Addy,
I starred quicklink the other day and noticed you had a hand in it :D Cool that you're thinking of adding support for preload as well!
I remember that dev.to is using a modified version of InstantClick to make the website feel faster, yours seems a more efficient (thanks to the IntersectionObserver) and modern implementation. Am I correct? Aside from the fact that InstantClick seems not to be maintained anymore.
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