title: Understanding a call of "console.log(typeof null);" in a javascript console
body: <p>I've just executed the following code in a Chromium <strong>javascript console</strong>:</p>
  
  <pre><code>console.log(typeof null);
  </code></pre>
  
  <p>The result is seen in the following screen capture:</p>
  
  <p><img src="https://i.stack.imgur.com/OQelh.png" alt="enter image description here"></p>
  
  <p>I am just wondering what the greyed <code>&lt;- undefined</code> line means. Can anyone please advise?</p>