Show HN: A tool to personalize pages with geolocational data in pure HTML

Hey everyone, I created a tool to personalize a webpage with geolocational data using only HTML.

You can do things like showing / hiding content based on the location of the user, or incorporate their location into a headline or text, with an elegant, ruby-looking syntax.

I would love some feedback :)

What if the product is not available in each visitor's country? Can you customize a list of countries where it is available?