<!DOCTYPE html>
<html>
  <script>
    function getB(obj) {
      debugger;
      obj.b;
    }
  </script>
  <script>
    const obj = { a: { b: 2, c: 3 }, b: 2 };
    debugger;
    obj.b = 3;

    obj.a.b = 3;
    obj.a.b = 4;

    console.log(obj.b);
    obj.b = 4;
    obj.b;
    obj.b;
    debugger;

    getB(obj);
    debugger;
    obj.b;
  </script>

  <body>
    Hello World!
  </body>
</html>
