inheritance in interesting object pattern

iop-stage4.js

let MyObj = {
	init(name){
		let myObj = {};
		myObj.greet = function(){MyObj.greet(name)};
		myObj.depart = function(){MyObj.depart(name)};
		return myObj;
	},
	greet(name){
		console.log(`Hi there, ${name}!!`);
	},
	depart(name){
		console.log(`Goodbye, ${name}!!`);
	}
};

let MyObjChild = {
	init(name){
		let myObjChild = MyObj.init(name);
		myObjChild.greet = function(){MyObjChild.greet(name)};
		return myObjChild;
	},
	greet(name){
		console.log(`Cowabunga, ${name}!!`);
	}
};


let myObj = MyObj.init('Billy');
myObj.greet();
myObj.depart();
// Hi there, Billy!!
// Goodbye, Billy!!

let myObjChild = MyObjChild.init('Jimmy');
myObjChild.greet();
myObjChild.depart();
// Cowabunga, Jimmy!!
// Goodbye, Jimmy!!