I was surprised to see at the end the author does frontend development. I do some (purely amateur) and find that having the code in front, the ability to glanc

I was surprised to see at the end the author does frontend development. I do some (purely amateur) and find that having the code in front, the ability to glance on a livereload browser on the left and on DevTools on the right is quite comfortable. But as I said, I am a pure amateur and (seriously) sit in the corner "not good enough to understand why this is not effective"