Typescript Class example

ts-class.ts

class Characters { 
    firstname: string;
    lastname: string;

    constructor(fs: string, ls: string) { 
        this.firstname = fs;
        this.lastname = ls;
    }

    getFullname() : string { 
        return this.firstname + ' ' + this.lastname;
    }

    greet(name?: string) {
        if (name) {
            return `Hello ${name}, My name is ${this.getFullname()}`;
        } else { 
            return `Hello, My name is ${this.getFullname()}`;
        }
    }
}

let spark: Characters = new Characters('John', 'Doe');

alert(spark.greet('Bob Marley'));