Would you recommend Justice League to somebody who hated Man of Steel, hated Batman v Superman , walked out from Suicide quad after 20 minutes and refused to watch Wonder Woman?
Both Wonder Woman and Justice league follow the formula (heroes fighting bad guys culminating in big boss fight at the end) so if you’re happy with that I’d say go see JL and you might have fun. But Wonder Woman is a better made film (and partially informs JL) so see that first!
Bearing in mind I’m a big fan of (nearly) all the films I’ll add that if you’re a casual viewer you really won’t be missing out on too much if you never see either one.