es6-fd-block-scoping.js

(function () {
  var g, h;
  function x() { f = ""; }
  function y() { h = f; }
  {
    // var-scoped f is undefined, let-scoped f is a function
    f = 1; // let-scoped f gets value 1
    x(); // var-scoped f gets value ""
    y(); // h gets value of var-scoped f
    function f() {} // var-scoped f gets value of let-scoped f
    g = f; // g gets value of let-scoped f
  }
  return [typeof f /* number */, typeof g /* number */, typeof h /* string */];
})();