Should border-images be considered contentful

[sohomdatta1]

Currently LCP only considers background-images to be contentful elements per the elements-exposed section of the element timing spec.

Given that border-images can explicitly load images from URLs and can have an effect on the paint time if included, would it make sense to classify paints, that paint a border-image as contentful ? (Given that they appear to behave similar to a background-image in most cases)

[yoavweiss]

Intuitively, I'd think that border images' goal is different than background images (more decorative). Might be interesting to look at some examples.

/cc @clelland

[clelland]

I'll take a look in HTTP Archive to see what real-world uses of this look like, and we'll see if it looks like an avenue for abuse that needs to be addresses.