Question

I’m new to java script i have small problem this little code it’s not working
it’s regarding object and function

var person = {
firstName : "kevin",
lastName : "sandigo"}

function getFullName() {
return this.firstName + " " + this.lastName;
}


alert(person.getFullName());

Answer 1

You should pass your object into the function, and use that argument to access its properties:

var person = {
    firstName: "kevin",
    lastName: "sandigo"
};

function getFullName (obj) {
    return obj.firstName + " " + obj.lastName;
}

alert( getFullName(person) );

---

If you want to create a class that you can re-use, you’ll have to declare the function on the prototype:

function Person (firstName, lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
}

Person.prototype.getFullName = function () {
    return this.firstName + " " + this.lastName;
};

var kevin = new Person("kevin", "sandigo");

alert( kevin.getFullName() );