Good question (meaning I don't know :) For my specific purposes it has always been good enough to apply some simple heuristics. But that wouldn't have been pos

Good question (meaning I don't know :) For my specific purposes it has always been good enough to apply some simple heuristics. But that wouldn't have been possible without access to post rendering information, which only a real browser (https://pptr.dev https://pptr.dev) can reliably produce.