复习下继承

复习下继承

1.复习下继承

function A(name,age){this.name=name;this.age=age;
}
undefined
function B(name,age){A.call(this,name,age);}
undefined
B.prototype.sayName=function(){console.log(this.name)}
ƒ (){console.log(this.name)}
B.prototype.sayAge=function(){console.log(this.age)}
ƒ (){console.log(this.age)}
var b1=new B('Sukla',18)
undefined
b1.sayName()
VM264:1 Sukla
undefined
b1.sayAge()
VM361:1 18
undefined