config/initializers/sanitize.rb

   1 # frozen_string_literal: true
   2
   3 Sanitize::Config::OSM = Sanitize::Config.merge(
   4   Sanitize::Config::RELAXED,
   5   :elements => Sanitize::Config::RELAXED[:elements] - %w[div style],
   6   :remove_contents => %w[script style],
   7   :attributes => Sanitize::Config.merge(
   8     Sanitize::Config::RELAXED[:attributes],
   9     "img" => Sanitize::Config::RELAXED[:attributes]["img"] + ["loading"]
  10   ),
  11   :transformers => lambda do |env|
  12     style = env[:node]["style"] || ""
  13
  14     env[:node].remove_class
  15     env[:node].remove_attribute("style")
  16
  17     env[:node].add_class("table table-sm w-auto") if env[:node_name] == "table"
  18
  19     case style
  20     when /\btext-align:\s+left\b/
  21       env[:node].add_class("text-start")
  22     when /\btext-align:\s+center\b/
  23       env[:node].add_class("text-center")
  24     when /\btext-align:\s+right\b/
  25       env[:node].add_class("text-end")
  26     end
  27
  28     if env[:node_name] == "a"
  29       rel = env[:node]["rel"] || ""
  30
  31       env[:node]["rel"] = rel.split.select { |r| r == "me" }.append("nofollow", "noopener", "noreferrer").sort.join(" ")
  32     end
  33
  34     env[:node]["loading"] = "lazy" if env[:node_name] == "img"
  35   end
  36 )