First of all : Eel is amazing ! This is a project I'd love to participate with.

One of the features I find lacking is the implementation of Jinja Variables. While the documentation and the options allow for inserting and using templates (with the jinja_templates argument in the start() function), I did not see any possibility to transfer variables within the templates.

It would be nice if this could be included either as a decorator or in a more "flask-like" fashion in the return of a function.

One solution that I tried to fiddle with but to no avail, was to create a decorator for the _static function (in the __init__.py) that seems to handle Jinja's template.render() function.

Here's what I got so far:

def jinjaVariables(_static):
    def innerFunction(path, jinja_variable=None):
        # the decorator recieved a Jinja Variable
        if "jinja_variables" is not None:
            response = None
            if 'jinja_env' in _start_args and 'jinja_templates' in _start_args:
                template_prefix = _start_args['jinja_templates'] + '/'
                if path.startswith(template_prefix):
                    n = len(template_prefix)
                    template = _start_args['jinja_env'].get_template(path[n:])
                    response = btl.HTTPResponse(template.render(jinja_variable))

            if response is None:
                response = btl.static_file(path, root=root_path)

            _set_response_headers(response)
            return response

        _static(path)

    return innerFunction

The idea was to create a global dictionary variable called jinja_variable and to update that variable depending on the page you want to visit.

If you were to include the jinja_variable in the kwargs of the start() function, wouldn't it be possible to dynamically change the output of the html page by accessing the required keys ?