Maybe an experienced senior front-end dev would know most of that. But lets be real here. Most of us started out by learning how to get notepad.exe to save .htm

Maybe an experienced senior front-end dev would know most of that. But lets be real here. Most of us started out by learning how to get notepad.exe to save .html files and trying out a tag or two. It's a good resource but I'd be looking more at using this to stay up to date with modern web dev work flows (which seems to have become insane over the past few years.)