<p></p>
<p dir="auto">I used <code class="notranslate">:attributes</code>, not <code class="notranslate">:add_attributes</code> here - a small difference that is easy to miss.</p>
<p dir="auto">This would <em>allow</em> <code class="notranslate">rel=me</code> to be used, but not <em>add</em> them to every link.</p>
<p dir="auto">The full code would then look like</p>
<div class="highlight highlight-source-ruby" dir="auto"><pre class="notranslate"><span class="pl-v">Sanitize</span>::<span class="pl-v">Config</span>::<span class="pl-c1">OSM</span> <span class="pl-c1">=</span> <span class="pl-v">Sanitize</span>::<span class="pl-v">Config</span><span class="pl-kos">.</span><span class="pl-en">merge</span><span class="pl-kos">(</span>
  <span class="pl-v">Sanitize</span>::<span class="pl-v">Config</span>::<span class="pl-c1">RELAXED</span><span class="pl-kos">,</span>
  <span class="pl-pds">:elements</span> <span class="pl-c1">=></span> <span class="pl-v">Sanitize</span>::<span class="pl-v">Config</span>::<span class="pl-c1">RELAXED</span><span class="pl-kos">[</span><span class="pl-pds">:elements</span><span class="pl-kos">]</span> - <span class="pl-kos">%w[</span><span class="pl-s">div</span> <span class="pl-s">style</span><span class="pl-kos">]</span><span class="pl-kos">,</span>

  <span class="pl-pds">:attributes</span> <span class="pl-c1">=></span> <span class="pl-kos">{</span> <span class="pl-s">"a"</span> <span class="pl-c1">=></span> <span class="pl-kos">{</span> <span class="pl-s">"rel"</span> <span class="pl-c1">=></span> <span class="pl-s">"me"</span> <span class="pl-kos">}</span> <span class="pl-kos">}</span><span class="pl-kos">,</span>  <span class="pl-c"># Whitelist rel=me</span>

  <span class="pl-pds">:add_attributes</span> <span class="pl-c1">=></span> <span class="pl-kos">{</span> <span class="pl-s">"a"</span> <span class="pl-c1">=></span> <span class="pl-kos">{</span> <span class="pl-s">"rel"</span> <span class="pl-c1">=></span> <span class="pl-s">"nofollow noopener noreferrer"</span> <span class="pl-kos">}</span> <span class="pl-kos">}</span><span class="pl-kos">,</span>
  <span class="pl-pds">:remove_contents</span> <span class="pl-c1">=></span> <span class="pl-kos">%w[</span><span class="pl-s">script</span> <span class="pl-s">style</span><span class="pl-kos">]</span><span class="pl-kos">,</span>
  <span class="pl-pds">:transformers</span> <span class="pl-c1">=></span> <span class="pl-en">lambda</span> <span class="pl-k">do</span> |<span class="pl-s1">env</span>|
    <span class="pl-s1">env</span><span class="pl-kos">[</span><span class="pl-pds">:node</span><span class="pl-kos">]</span><span class="pl-kos">.</span><span class="pl-en">remove_class</span>
    <span class="pl-s1">env</span><span class="pl-kos">[</span><span class="pl-pds">:node</span><span class="pl-kos">]</span><span class="pl-kos">.</span><span class="pl-en">kwattr_remove</span><span class="pl-kos">(</span><span class="pl-s">"style"</span><span class="pl-kos">,</span> <span class="pl-c1">nil</span><span class="pl-kos">)</span>
    <span class="pl-s1">env</span><span class="pl-kos">[</span><span class="pl-pds">:node</span><span class="pl-kos">]</span><span class="pl-kos">.</span><span class="pl-en">add_class</span><span class="pl-kos">(</span><span class="pl-s">"table table-sm w-auto"</span><span class="pl-kos">)</span> <span class="pl-k">if</span> <span class="pl-s1">env</span><span class="pl-kos">[</span><span class="pl-pds">:node_name</span><span class="pl-kos">]</span> == <span class="pl-s">"table"</span>
  <span class="pl-k">end</span>
<span class="pl-kos">)</span></pre></div>

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