class实现

[Henry-Diasa]

寄生组合式继承 + setPrototypeOf实现静态属性的继承

   function selfClass(Child, Parent) {
         Child.prototype = Object.create(Parent.prototype, {
               constructor: {
                    enumerable: false,
                    configurable: false,
                    writable: true,
                    value: Child
                }
         })
         Object.setPrototypeOf(Child, Parent);
   }