Add ability to control walker function

[deser]

Hi, thanks for the great plugin!
I'd like to control which selectors mustn't be namespaced (for example html tag). Therefore I suggest to add to options callback which would be called for testing if this selector should be namespaced.

P.S. All in all I believe that html tag shouldn't be namespaced at all.

[topaxi]

You can use :root for this.

By default :root will be dropped though, so if you want to select html you can either disable the dropRoot option or prefix html with :root.

Example with dropRoot set to false:

:root {
  /* this is the html element */
}

Example with dropRoot set to true (sadly the default).

:root html {
  /* this is the html element */
}

[deser]

Thanks for quick answer. The problem is deeper )
I use bootstrap (as an example) so I don't have ability to paste :root where I want

[deser]

P.S. All in all I believe that html tag shouldn't be namespaced at all.

Or better replace html with html${computedNamespace}

[deser]

Here is pull: #7

[deser]

Ping :)