Andreas Kling 3e970540b4 LibWeb: Don't compute full style for ::before/::after unless matched ...

Before this patch, we would build full computed style for these pseudo
elements, for every DOM element, even if no ::before/::after selector
actually matched.

This was a colossal waste of time, and we can also just not do that.
Instead, just abort pseudo element style resolution early if no relevant
selectors matched. :^)

2023-03-14 16:53:03 +01:00

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