bulma (input/field): don't use kwargs anymore: `**kwargs` syntax is not supported by `nunjucks`. To work around this, most important arguments have been added directly to macros, and an extra `attrs` argument can be used for others.

from browser import bind, document


@bind("#main_menu_burger", "click")
def burger_click(ev):
    document["main_menu"].classList.toggle('is-active')
    document["main_menu_burger"].classList.toggle('is-active')