Backend vs Frontend Learning Curves
Noted differences between learning frontend and backend technologies.
I'm a backend software developer by education and trade. Sure, I dabble in full-stack and have cobbled together a few frontend projects in a hobbyist sort of way, but the main chunk of my knowledge and experience lies in (but is not limited to) Java and C technologies.
The best you can hope for is to keep up with trends and have an overall idea about what's going on. Learn about ideas and best practises that might catch on and carry throughout multiple technologies and don't expect to have experience in everything (or anything in my case) that your next frontend job asks of you.