Object has no method Javascript

Question

I don't know why I am getting this problem. I have used prototype before in javascript and it works fine but for some reason it is not working here:

test.html:

<script type="text/javascript">
        $(document).ready(function(){
        UserOptions("test");
    });
</script>

UserOptions.js:

 function UserOptions(username){
    ...
    var userOptions = document.createElement("div");
    userOptions.className = "userOptions";
    **this.createBtns(userOptions);**
    userContainer.appendChild(userOptions);


    contentCenter.appendChild(userContainer);
    contentCenter.appendChild(br);

    BuddyList();
    }

    UserOptions.prototype = {
        createBtns:function(parent){
            var self = this;
            /* Add Buddy Button */
            var addBtnContainer = document.createElement("div");
            addBtnContinaer.className = "addBtnContainer";
    ...}

I keep getting the error Object has no method 'createBtns'

Could you also post the line where you try to create the object? — Matti Virkkunen
– Matti Virkkunen, Commented Feb 5, 2011 at 3:58
I get the error on the line : this.createBtns(userOptions); I bolded it — Twidizle
– Twidizle, Commented Feb 5, 2011 at 4:01
@Twidizle: Yes, I can see that line, but I want the line where you try to create an instance of UserOptions. — Matti Virkkunen
– Matti Virkkunen, Commented Feb 5, 2011 at 4:02
You realize that the last line of "creteBtns" has a misspelling, right? — Pointy
– Pointy, Commented Feb 5, 2011 at 4:04

Matti Virkkunen · Accepted Answer · 2011-02-05 04:05:41Z

11

You forgot the new keyword. Now it's trying to call your constructor as a regular function, and this will point to window or whatever.

new UserOptions("Fred");

answered Feb 5, 2011 at 4:05

Matti Virkkunen

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4 Comments

Twidizle Over a year ago

ty... I forgot that prototype makes javacript "object oriented"

Matti Virkkunen Over a year ago

@Twidizle: You might want to start marking good answers on your questions as accepted (green tick mark next to the score). I see you haven't marked any accepted answers on your previous ones.

Alex Over a year ago

@Twidizle new is not a prototype thing. It's a Javascript thing.

Kathy Van Stone Over a year ago

More accurately, prototype makes javascript more class oriented -- javascript is objected oriented already.

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