title: Remove HTML element (DOM Node) from memory
body: <p>according to <a href="https://developer.mozilla.org/en/DOM/Node.removeChild" rel="noreferrer">mdn documentation</a> the method <code>removeChild</code> removes a node from the DOM but it still resides in memory.
  My problem is that I want to delete it from memory as well.
  I've tried with the <code>delete</code> operator but the object is still there...</p>
  
  <pre><code>myCanvas.parentElement.removeChild(myCanvas);  // myCanvas actually removed from DOM
  delete myCanvas;  // false. does nothing
  alert(myCanvas); // shows HTMLCanvasElement instead of undefined
  </code></pre>