hoisting-test.js

'use strict';

function test1() {
  console.log('-- test1 --');
  console.log(x);
  try {
    console.log(y);
  } catch(e) { console.log(e); }

  var x = 0;
  let y = 0;
}

function test2() {
  console.log('-- test2 --');

  foo();
  try {
    bar();
  } catch(e) { console.log(e); }
  try {
    baz();
  } catch(e) { console.log(e); }

  function foo() { console.log('foo'); }
  var bar = function() { console.log('bar'); }
  let baz = function() { console.log('baz'); }
}

test1();
test2();

output

-- test1 --
undefined
[ReferenceError: y is not defined]
-- test2 --
foo
[TypeError: bar is not a function]
[ReferenceError: baz is not defined]