JS设计模式:安全类 继承 多继承 多态
##安全类 ``` var Book = function() { if(this instanceof Book) { this.title = title; this.time = time; this.type = type; } else { return new Book(title, time, type); } } ``` ##继承 ###类式继承 ``` function SuperClass() { this.books = ['JS', 'html', 'css']; } function SubClass() {} Subclass.prototy...