IAmTheRockstar

Every time want to create a YUI 3 Plugin, I always run into this same problem. I'm sick of forgetting this, so I'm going to blog about it, in hopes that it will help me remember. Here's my code until a few minutes ago:

YUI.add('formPlugin', function(Y) {

    var FormPlugin = Y.Base.create('formPlugin', Y.Plugin, [], {}, {});

}, '1.0', {requires: ['base', 'plugin']});

This makes YUI very angry. What's worse is that it gets swallowed in YUI's error handling, so you don't even get good line numbers. The console spits out Uncaught TypeError: Cannot read property 'constructor' of undefined--It kinda provides hints, but it required me to get out ye ol' debugger to figure it out.

The problem is actually very easy. Don't extend Y.Plugin You should be extending Y.Plugin.Base, and the documentation says that, but I keep forgetting.

Don't let it happen to you.