YUI Tutorial not working - yui

Question

Why does this code from this YUI3 example not work for me?
HTML:
<!-- The original body content is above -->
<div id="form_container">
<form class="yui3-widget-bd" id="theme_form" action="#" method="get">
<fieldset>
<h3>Update Theme</h3>
<label for="font_size">Font size:</label>
<input type="text" size="3" id="font_size" value="16px">
<label for="heading_color">Heading color:</label>
<input type="text" size="12" id="heading_color" value="#005A9C">
<label for="link_hover">Link hover backgound:</label>
<input type="text" size="12" id="link_hover" value="#ffa">
</fieldset>
<input type="submit">
</form>
</div>
Javascript:
// Create a new YUI instance, requiring stylesheet, overlay, slider, and the
// dd-plugin to make the overlay draggable
YUI({
filter: 'raw'
}).use("stylesheet", "overlay", "slider", "dd-plugin", function(Y) {
var myStyleSheet = new Y.StyleSheet(),
overlayContent = Y.one('#form_container'),
overlay, slider, slider_container, fontSizeInput;
// Create the Overlay, using the form container as the contentBox.
// The form is assigned a class yui-widget-bd that will be automatically
// discovered by Overlay to populate the Overlay's body section.
// The overlay is positioned in the top right corner, but made draggable
// using Y.Plugin.Drag, provided by the dd-plugin module.
overlay = new Y.Overlay({
srcNode: overlayContent,
width: '225px',
align: {
points: [Y.WidgetPositionAlign.TR, Y.WidgetPositionAlign.TR]
},
plugins: [Y.Plugin.Drag]
}).render();
// Slider needs a parent element to have the sam skin class for UI skinning
overlayContent.addClass('yui3-skin-sam');
// Progressively enhance the font-size input with a Slider
fontSizeInput = Y.one('#font_size');
fontSizeInput.set('type', 'hidden');
fontSizeInput.get('parentNode').insertBefore(
Y.Node.create('6 <span></span> 36'), fontSizeInput);
slider_container = fontSizeInput.previous("span");
// Create a Slider to contain font size between 6px and 36px, using the
// page's current font size as the initial value.
// Set up an event subscriber during construction to update the replaced
// input field's value and apply the change to the StyleSheet
slider = new Y.Slider({
length: '100px',
min: 6,
max: 36,
value: parseInt(Y.one('body').getStyle('fontSize')) || 13,
after: {
valueChange: function(e) {
var size = e.newVal + 'px';
this.thumb.set('title', size);
fontSizeInput.set('value', size);
myStyleSheet.set('body', {
fontSize: size
});
}
}
}).render(slider_container);
// The color inputs are assigned keyup listeners that will update the
// StyleSheet if the current input value is a valid CSS color value
// The heading input affects all h1s, h2, and h3s
Y.on('keyup', function(e) {
var color = this.get('value');
console.log(color);
if (isValidColor(color)) {
console.log("Valid color", myStyleSheet);
myStyleSheet.set('h1, h2, h3', {
color: color
});
}
}, '#heading_color');
// The link hover affects the background color of links when they are
// hovered. There is no way other than via stylesheet modification to
// change pseudo-class styles.
Y.on('keyup', function(e) {
var color = this.get('value');
if (isValidColor(color)) {
myStyleSheet.set('a:hover', {
backgroundColor: color
});
}
}, '#link_hover');
// Progressive form enhancement complete, now prevent the form from
// submitting normally.
Y.on('submit', function(e) {
e.halt();
}, '#theme_form');
// A rudimentary validator to make sure we're not trying to set
// invalid color values in StyleSheet.
function isValidColor(v) {
return /^#[0-9a-f]{3}(?:[0-9a-f]{3})?$/i.test(v) || /^rgb\(\s*\d+\s*,\s*\d+\s*,\s*\d+\s*\)$/.test(v) || /^[a-z]{3,}$/i.test(v);
}
});
CSS:
/* For supporting browsers, the overlay is rendered semi-transparent with
* fancy rounded corners */
.yui3-overlay {
background: rgba(128,128,128,0.3);
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
padding: 7px;
cursor: move;
}
.yui3-overlay-content {
background: rgba(205,205,205,0.3);
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
padding: 1px;
}
.yui3-overlay form {
background: #f2fbff;
border: 2px solid #fff;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
margin: 0;
padding: 0;
font-size: 13px;
}
.yui3-overlay fieldset {
border: 1px solid #bcd;
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
margin: 0;
padding: 20px;
}
.yui3-overlay h3 {
border-bottom: 2px solid #fff;
color: #479;
background: transparent;
margin: 0;
font-size: 175%;
}
.yui3-overlay label {
display: block;
margin: 1.3em 0 0.5ex;
font-weight: bold;
color: #003;
}
.yui3-overlay p {
margin: 2em 0 0;
}
/* override the move cursor for the Slider */
.yui3-overlay .yui3-slider:hover {
cursor: default;
}
I just copied and pasted the code, can anyone help?

Answer 1

Your tag is missing class="yui3-skin-sam yui-skin-sam"

Answer 2

It appears to be working. I copied/pasted your code into this jsfiddle. Change with the slider and header color change field, it seems to update the color and size.

Answer 3

This is not the best forum to do support debugging.
You're welcome to ask in the #yui channel on freenode rather than go through slow, back and forth debugging here.