JAVASCRIPT

JavaScript Object Prototype

// constructor function
function Person () {
    this.name = 'John',
    this.age = 23
}

// creating objects
let person1 = new Person();
let person2 = new Person();

// adding new property to constructor function
Person.prototype.gender = 'Male';

console.log(person1.gender); // Male
console.log(person2.gender); // Male

javascript object prototype

function listAllProperties(o) {
  let objectToInspect = o;
  let result = [];

  while(objectToInspect !== null) {
    result = result.concat(Object.getOwnPropertyNames(objectToInspect));
    objectToInspect = Object.getPrototypeOf(objectToInspect)
  }

  return result;
}

access the prototype of an object javascript

var f = function();
var instance = new f();

access the prototype of an object javascript

Object.getPrototypeOf(x);

//Output
ƒ () { [native code] }