jsPrototype.js

const p1 = {
    name: 'p1', 
    sayHi: function(){console.log('hi')}
}


function Person(name) {
    this.name = name;
    this.sayHi = function(){console.log('hi')};
}

const p4 = new Person('p4');

const BetterPerson = function BetterPerson(name) {
    this.name = name;
}

BetterPerson.prototype.sayHi = function(){console.log('hi')};
BetterPerson.prototype.age = 20;

const p7 = new BetterPerson('p7');
const p8 = new BetterPerson('p8');

console.dir(p7);
console.dir(p8);