title: What is focal scope?
body: <p>I am reading a book on Javascript and it uses the word 'focal scope' but never states what it means. Example: "The interpreter's focal scope will move into the newly created scope"</p>
  
  <p>It seems like they are using the notion of focal scope to refer to control flow. When I google 'focal scope Javascript' nothing really comes up. Is there anything more to this? </p>