class.extend.js

class PersonClass{
    constructor(name, age){
        this.name = name
        this.age = age
    }
    getName(){
        return this.name
    }
}
class AdultClass extends PersonClass{
    constructor(name, age, job) {
        super(name, age)
        this.job = job
    }
    getJob(){
        return this.job
    }
}

function PersonFunc(name, age){
    this.name = name
    this.age = age
}
PersonFunc.prototype.getName = function(){
    return this.name
}
function AdultFunc(name, age, job){
    PersonFunc.call(this, name, age)
    this.job = job
}
AdultFunc.prototype.getJob = function(){
    return this.name
}
Object.setPrototypeOf(AdultFunc.prototype, PersonFunc.prototype)


var a1 = new AdultClass('Bob', 18, 'programer')
console.log(a1)
console.log(a1.getJob())

var a2 = new AdultFunc('Bob', 18)
console.log(a2)
console.log(a2.getName())