USER-DEFINED OBJECT IN OBJECT EXAMPLE JAVASCRIPT
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<!doctype html>
	<head>
		<title>Object in Object Example JavaScript</title>
	</head>
	<body>
		<script>
			/* defining a new constructor function */
			function Person(name, age, city) {
                this.name = name;
                this.age = age;
                this.city = city;
            }
            
            function Bike(company, model, year, owner) {
                this.company = company;
                this.model = model;
                this.year = year;
                this.owner = owner;
            }
            
            /* creating the object */
            let john = new Person("John Wick", 30, "New York");
            let myBike = new Bike("KTM", "Duke", 2010, john);
            
            document.write(myBike.company+"<br/>"+myBike.model+"<br/>"+myBike.year+"<br/>"+myBike.owner.name);
		</script>
	</body>
</html>