title: Why i cant use a <hr/> tag outside another tag in ReactJS?
body: <p>When trying to return this code:</p>
  
  <pre><code>return &lt;hr/&gt;&lt;h1&gt;E esse é um Class Component&lt;/h1&gt;
  </code></pre>
  
  <p>I get a error, but if i change to:</p>
  
  <pre><code>return &lt;h1&gt;&lt;hr/&gt;E esse é um Class Component&lt;/h1&gt;
  </code></pre>
  
  <p>It works. In the error it says Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment but i didn't quite get it. Can someone explain please? I'm starting to learn React so i'm kinda newbie.</p>