title: HTMLCanvasElement : Getting Uint8ClampedArray
body: <p>I'm trying to implement <a href="https://github.com/eduardolundgren/tracking.js" rel="nofollow noreferrer">this</a> library on an angular 7 application. For getting faces I need to convert a <code>canvas html dom element</code> to a <code>Uint8ClampedArray</code>.</p>
  
  <p>Anyone knows how can I get a <code>Uint8ClampedArray</code> object from a CanvasElement?</p>