// TypeScript
class Car {
    engine: string;
    constructor (engine: string) {
        this.engine = engine;
    }

    start() {
        return "Started " + this.engine;
    }
}

// JavaScript
var Car = (function () {
    function Car(engine) {
        this.engine = engine;
    }
    Car.prototype.start = function () {
        return "Started " + this.engine;
    };
    return Car;
})();