title: Clear an alert message
body: <p>Let's say I have a code like this:</p>
  
  <pre><code>alert('Hello World') 
  </code></pre>
  
  <p>So on my device is going to appear an alert message saying 'Hello World'. That message will be there until I press Ok. </p>
  
  <p>But is there  any way to remove the alert message from the screen with code? Instead of pressing Ok on the device?</p>