That's too broad a question; you'd need to specify "front-end developers" in the context of their primary focus, first. Are they game developers? Are they work

That's too broad a question; you'd need to specify "front-end developers" in the context of their primary focus, first. Are they game developers? Are they working on enterprise apps? Are they working on lead-gen landing pages for marketing companies? Data visualization? Accessibility-focused? etc... Front-end is becoming increasingly specialized to a degree.