About the js inheritance method, solve it!

{Code ...} this inheritance method is perfect in the book, but I don't think it is because of his superman. prototypenewperson (); adds the instance attribute of the parent class to the prototype of the subclass. call (this, name, age); has obtained the parent class...

function person(name,age){    this.name = name;    this.age = age;}person.prototype.say = function(){    console.log(this.name+":"+this.age);}function superman(name,age){    person.call(this,name,age);}superman.prototype = new person();var s = new superman('superman',29);

This inheritance method is perfect in the book, but I don't think it's because of hissuperman.prototype = new person();This statement will add the instance attributes of the parent class to the prototype of the subclass.person.call(this,name,age);I have obtained the instance attribute of the parent class, but it seems that the prototype of the subclass is contaminated. how can this problem be solved?

Okay, the problem is solved. the problem can be solved through parasitic combined inheritance.

function object(obj){ function F(){} F.prototype = obj; return new F();}function inheritProtoType(SuperType,SubType){     var prototype = object(SuperType.prototype);     prototype.constructor = SubType;     SubType.prototype = prototype;}function SuperType(){    this.name = 'yuhualingfeng';    this.friends = ['David','Bob','Lucy'];}SuperType.prototype.saySuperName = function(){    console.log(this.name);};function SubType(){    SuperType.call(this);    this.age = 30;}inheritProtoType(SuperType,SubType);SubType.prototype.saySubName = function(){    console.log(this.name);};var subType = new SubType();