function Base() {
    this.a = 100
}
function Derived() {
    Base.call(this)
    this.b = 200
}
Base.prototype.info = function () {
    console.log(this.a, this.b)
}
Object.setPrototypeOf(Derived.prototype, Base.prototype);

log = console.log

let b = new Base()
let d = new Derived()

log(b)
log(d)
d.info()