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JavaScript Practice Classes in JavaScript Practicing Classes Practice Adding Methods

Thank you very much for all your help, I will sleep now and hopefully I will understand it tomorrow - too much for now!

I just don't' understand, how I can get Treehousestzdent2" to be out...

class User {
    constructor(email, username, birthday) {
        this.email = email;
        this.username = username;
        this.birthday = birthday;

    changeUsername(username) {
        this.username = username;

var user1 = new User('JavaScriptStudent@teamtreehouse.com', 'JSUser1', '1/08/1991');
var user1 = "TreehouseStudent2"

2 Answers

Steven Parker
Steven Parker
229,788 Points

A variable should only be declared once. And the task is not to re-assign "user1", but to use it to call your new method and pass the string to it as an argument:


This is an intermediate-level practice course. Is it possible you're taking it before you've done some of the more fundamental courses covering objects and methods?

that's what I am planning, I will not start from the very beginning on, but I have to catch up a lot of things ... thankyou ... kind regards, Jan,

Sean Duff
Sean Duff
979 Points

The key is to put user1.username = "TreehouseStudent2"; within the changeUsername() method. The line must be inside of a method in order to execute - being inside of the class is not enough...Being outside of the class won't do anything either.