Constructors

↓ Example ↓
// create the constructor
function Flight(airlines, flightNumber) {
    this.airlines = airlines;
    this.flightNumber = flightNumber;

    this.display = function() {
        console.log(this.airlines);
        console.log(this.flightNumber);
    };
}

let flight1 = new Flight("American Airlines", "AA123");
let flight2 = new Flight("Southwest", "SW497");

flight1.display(); //    RESULT: "American Airlines" "AA123"        
flight2.display(); //    RESULT: "Southwest" "SW497"

console.log(flight1 instanceof Flight)
//    RESULT: returns true

console.log(flight2 instanceof Flight)
//    RESULT: returns true

console.log(flight1.constructor === Flight)        
// RESULT: returns true