title: How can I suppress "The tag <some-tag> is unrecognized in this browser" warning in React?
body: <p>I'm using elements with custom tag names in React and getting a wall of these errors.  There's a GitHub issue on the subject (<a href="https://github.com/hyperfuse/react-anime/issues/33" rel="noreferrer">https://github.com/hyperfuse/react-anime/issues/33</a>) in which someone states:</p>
  
  <blockquote>
    <p>This is a new warning message in React 16. Has nothing to do with anime/react-anime and this warning can safely be ignored.</p>
  </blockquote>
  
  <p>It's nice that it can be safely ignored, but it's still not going to pass scrutiny when my code is filling the console with useless error messages.</p>
  
  <p>How can I suppress these warnings?</p>