title: How to apply a ":contains" selector without jQuery?
body: <p>I am looking to be able to do this function</p>
  
  <pre><code>$( "div:contains('John')" ).css( "text-decoration", "underline" );
  </code></pre>
  
  <p>without using jQuery, just straight up javascript, I cant find the equivalent</p>
  
  <p>I know I am looking for <code>indexOf</code>, but putting it all together is not working for my current mindset.</p>