Question: I'm trying to write out some dynamic CSS using Jade, like so: 

```
style(type='text/css')
    each item in colors
        .#{item.class} { background-color : #{item.background}; color: #{item.foreground}; }

```

However this gives the following error:

```
ReferenceError: media='print')
    7|  style(type='text/css')
  > 8|      - for(var item in colors)
    9|          .#{item.class} { background-color : #{item.background}; color: #{item.foreground}; }
    10| block Content
    11|     include scheduleTemplate

item is not defined

```

If I remove the style tag, it renders fine. Is there any way to use iteration within a style block?

Answer: 
Because `style` tags only allow text in Jade, it's treating your `each item in colors` as plain text. Then it encounters the `#{item.class}` and attempts to parse that, but it fails because it didn't define `item` on the previous line.

Unfortunately, I'm not sure that there is a good way to do this in Jade. You might just have to define all of your css ahead of time in JS and then insert it like so:

```
style(type='text/css')
    #{predefined_css}

```

At that point though, it might be simpler to just move the styles to an external stylesheet that gets generated for each user and then serve it with some reasonable caching headers. That would avoid the difficulties with trying to make Jade do dynamic CSS and speed up subsequent page loads for your users.
Another way is to import your own css stylesheet. In the [Jade doc](http://jade-lang.com/reference/includes/), you can see that you can include a style sheet with such code:

```
html
  head
    style
      include style.css

```

Then, you can define any CSS in a separate file that you can reference.