some javascript file and extensions about examples in Zakas, Nicholas 's book "The Principles of object-oriented javascript"
I typed and edited Effective JavaScript’s book’s source code, because original is incomplete
The book is (https://book.douban.com/subject/26962962)
The book is (https://book.douban.com/subject/27155609)
The book is (https://book.douban.com/subject/30175960)