JS OOP: 10. Prototype inheritance salah

by istiq20

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Prototype inheritance salah</title>
</head>
<body>
    <script>
        function Employee(firstName) {
            this.firstName = firstName
        }

        function Manager(firstName) {
            this.firstName = firstName;
        }

        Manager.prototype = Employee.prototype; // salahnya disini

        Manager.prototype.sayHello = function(name){
            console.info(`Hello ${name}, my name is Manager ${this.firstName}`);
        }

        Employee.prototype.sayHello = function(name){
            console.info(`Hello ${name}, my name is Employee ${this.firstName}`);
        }

        const employee = new Employee("Eko");
        employee.sayHello("Joko"); // Hello Joko, my name is Employee Eko

        const manager = new Manager("Budi");
        manager.sayHello("Joko"); // Hello Joko, my name is Employee Budi

    </script>
</body>
</html>