title: Uncaught TypeError: Window.addEventListener is not a function
body: <p>I tried to add an event listener on the DOM Window, however, it suggests that <code>Window.addEventListener</code> is not a function.</p>
  
  <pre><code>&lt;script&gt;
    Window.addEventListener('keydown',function (e){
      console.log(e);
    });
  &lt;/script&gt;
  </code></pre>
  
  <p>I expected the console to log the keydown event.</p>