I think React is "winning" the framework competition, if we're judging from number of jobs. It seems like a business decision for many people - React can make websites and apps, and it's probably easier. I haven't had enough experience to say, but it seems like Java; not necessarily the best tool, but something easy to hire for.

Flutter is also coming in hard on mobile. Also not something I've had enough experience to comment on, but there's also little criticism, which suggests it's a good thing.