require('pro-router') tag router def render <{ view }> tag switch prop key prop disabled css cursor:pointer def render tag ref < a prop view prop target prop go def render def active? R.to_path == link get link do #link ||= go || url #tu skonczylem: def url if target let attributes = L.reduce L.concat({}, target), do |map, el| map[el:type] = el:id map R.to_path view, L.defaults attributes || {}, R:safe_params tag not_found def render do "Page not found :/"