title: What does means $x("//*");
body: <p>In the console of DevTools on google.com enters:</p>
  
  <pre><code>$x("//*");
  </code></pre>
  
  <p>I receive array.</p>
  
  <p>What does means this syntax?</p>
  
  <p>Is it related to jQuery? And if so, how to understand <strong>"//*"</strong>?</p>