Any programming language has its strengths and weaknesses, but the JavaScript language largely consists of the latter, as it was developed in a hurry and was practically not debugged. In this book, among the many worst JavaScript constructs, the most reliable, understandable, and maintainable subset of the language is highlighted, the subset of the language that allows you to create truly extensible and efficient code. The author, a respected JavaScript expert among developers, highlights a lot of interesting ideas that make JavaScript is an excellent object-oriented programming language. This book will introduce you to a beautiful, elegant, simple, and expressive programming language that allows you to write efficient code, whether you're managing object libraries or just trying to make Ajax work faster. If you develop websites or applications for the Internet, the via book is a must-have for you.