How would The Joker react if Batman painted his mask white with Green hair and wore Purple body armor to look like him and mock his appearance?

If Batman painted a mask White with Green hair and wore Purple body armor on purpose to resemble The Joker and mock his appearance how would The Joker react to seeing The Bat Jokerman who laughs and taunts him by behaving similar to Joker?

Batman could easily embarrass The Joker make him look stupid too.