title: "React does not recognize the `classsName` prop on a DOM element"
body: <p>I'm working on a React application and keep running into an error that I don't understand. I can't find it anywhere else. My understanding is that within a JSX element I should always use "className" instead of the "class" attribute. But, I get this warning:</p>
  
  <pre><code>index.js:2178 Warning: React does not recognize the `classsName` prop on a DOM element. If you intentionally want it to appear in the DOM as a custom attribute, spell it as lowercase `classsname` instead. If you accidentally passed it from a parent component, remove it from the DOM element.
  </code></pre>
  
  <p>Anyone seen this before or have an idea what I got wrong?</p>