config/initializers/sanitize.rb

   1 Sanitize::Config::OSM = Sanitize::Config.merge(
   2   Sanitize::Config::RELAXED,
   3   :elements => Sanitize::Config::RELAXED[:elements] - %w[div style],
   4   :remove_contents => %w[script style],
   5   :attributes => Sanitize::Config.merge(
   6     Sanitize::Config::RELAXED[:attributes],
   7     "img" => Sanitize::Config::RELAXED[:attributes]["img"] + ["loading"]
   8   ),
   9   :transformers => lambda do |env|
  10     style = env[:node]["style"] || ""
  11
  12     env[:node].remove_class
  13     env[:node].remove_attribute("style")
  14
  15     env[:node].add_class("table table-sm w-auto") if env[:node_name] == "table"
  16
  17     case style
  18     when /\btext-align:\s+left\b/
  19       env[:node].add_class("text-start")
  20     when /\btext-align:\s+center\b/
  21       env[:node].add_class("text-center")
  22     when /\btext-align:\s+right\b/
  23       env[:node].add_class("text-end")
  24     end
  25
  26     if env[:node_name] == "a"
  27       rel = env[:node]["rel"] || ""
  28
  29       env[:node]["rel"] = rel.split.select { |r| r == "me" }.append("nofollow", "noopener", "noreferrer").sort.join(" ")
  30     end
  31
  32     env[:node]["loading"] = "lazy" if env[:node_name] == "img"
  33   end
  34 )