This looks really good and I'll probably read a little here and there when I get the urge. But I don't think deep knowledge of JavaScript will pay off in today's web development world.
I deep dived JavaScript many years ago so I could move away from C#. It was only useful in interviews so I could answer all the esoteric trivia. On the job it was using JS frameworks and libraries like Lodash. And then TypeScript came along and eclipsed it all together.
You're better off learning just enough JavaScript and then deep diving TypeScript and Angular, React, or another framework.
I deep dived JavaScript many years ago so I could move away from C#. It was only useful in interviews so I could answer all the esoteric trivia. On the job it was using JS frameworks and libraries like Lodash. And then TypeScript came along and eclipsed it all together.
You're better off learning just enough JavaScript and then deep diving TypeScript and Angular, React, or another framework.