if theme.Open_Graph_meta.enable
  -
    const coverVal = page.cover_type === 'img' ? page.cover : theme.avatar.img
    let ogOption = Object.assign({
      type: is_post() ? 'article' : 'website',
      image: coverVal ? full_url_for(coverVal) : '',
      fb_admins: theme.facebook_comments.user_id || '',
      fb_app_id: theme.facebook_comments.app_id || '',
    }, theme.Open_Graph_meta.option)
  -
  != open_graph(ogOption)
else
  meta(name="description" content=page_description())