Earlier quoted context omitted.
This book needs some serious editing. There is clunky English which native speakers can figure out the gist of it but English as a second or later language would have a problem with. There are parts where I wonder why certain terminology is not explained before using it and other areas where terminology is explained that I assume the reader needed to know before reading this material. Good technical books have a sect…
Could you be more specific about the problems you found? The first few chapters of the book have been edited by three professional editors at this point.
Re: Eloquent JavaScript, Second Edition
#111(Clarification: actually, that goes for the first 4 real chapters. The intro chapter might still be a little rough.)