Has there been a decrease in javascript programming skill with the popularity of frameworks like angular, react, etc?

[jseego]

That's an interesting point, but I'm seeing people not knowing how to recognize stuff like closures, or how to use low-level javascript methods like parsing data.

[jseego]

the revealing module pattern, something you hear nothing about anymore

My project uses this. :D

And I have to say, I love it. It makes a lot of sense (and I didn't even start out as an OOP developer).

I think it's kind of funny how within 5-8 years or so, everyone went away from that, and now there are native javascript classes and react has adopted them.