> - It makes an assumption about selection color, which is OS- and browser-dependent.
> - Each smart-underlined link has 12 text-shadows drawn underneath it, which could potentially have performance penalties on mobile or older devices.
https://eager.io/showcase/SmartUnderline/
(Imho, the two points introduce enough risks and reasons to not use it and wait for OS- or browser-level updates instead.)
> - It makes an assumption about selection color, which is OS- and browser-dependent.
> - Each smart-underlined link has 12 text-shadows drawn underneath it, which could potentially have performance penalties on mobile or older devices.
https://eager.io/showcase/SmartUnderline/
(Imho, the two points introduce enough risks and reasons to not use it and wait for OS- or browser-level updates instead.)