Why does jQuery throw the error `fadeOut is not a function'?

Question

I am using jQuery and put this code in my javascript:

function HideMe(itemID) {
    var myDiv = 'item_' + itemID;
    $(myDiv).fadeOut("slow");
}

But its giving me this error: fadeOut is not a function.

Answer 1

This will happen if you're using the "slim" version of jQuery. Only the "full" version of jQuery includes animation effects.

Try grabbing the "full" version of jQuery from the jQuery downloads page and including that in your page (or including a full version of jQuery from a CDN from your page).