Classes In Javascript

<script>
    class Person {
        constructor() { }
        messageme() {
            alert("Hi Gyan");
        }
    }
    class PersonWithParam {
        constructor(message) {
            this.message = message;
        }
        messageme() {
            alert("hello " + this.message);
        }
    }
    person = new Person();
    person.messageme();
    personWithParam = new PersonWithParam("Gyan");
    personWithParam.messageme();
</script>

Query/Feedback