title: How do poker calculation apps work and are they realizable in JavaScript?
body: <p>I have two questions regarding poker calculation (e.g. calculate odds) apps.</p>
  
  <ol>
  <li>How do poker apps work generally? I mean which technique is used to find the cards on the screen and to get their value? There must be an algorithm filtering the whole screen or game window for cards and assigning the values to the players. Furthermore it needs to find my position at the table and create an order of players. To me, this sounds very complex. Are there maybe common frameworks which are used for this purpose or is this a wrong approach?</li>
  <li>Is it somehow possible to build a poker odd calculator for web browser based poker rooms in javascript? </li>
  </ol>
  
  <p>Thanks!</p>