【继承】类式继承

patterns-inheritance-classical.js

function SuperClass(params) {
  this.superValue = true;    
}

SuperClass.prototype.getSuperValue = function() {
  return this.superValue;
}

function SubClass () {
  this.subValue = false;
}

SubClass.prototype = new SuperClass();
SubClass.prototype.getSubValue = function () {
  return this.subValue;
}