Pseudo-Apollodorus: Epitome 1.20

In the construction " καὶ καυχώμενον ὡς Ἥρᾳ μιγέντα ", what function does the ὡς have? It seems like it should be a conjunction that links the verb καυχώμενον with the Ἥρᾳ μιγέντα, but, because the participle μιγέντα is in accusative, it looks like a complement clause made with a participle construction, so I have no clue what's happening.

Here's the link to Perseus to see the complete text

Pd.: Sorry if at some point I explain poorly what I want to say, I'm in an amateur level and I don't know very well the english terminology as I'm from Spain. Thank you for reading.