/*
It could be a bit strange, but when I first time heard about ES6 block scoping, I felt very excited ;)
Usually, for doing this I could use an immediately invoked function expression (IIFE).
*/

// Like this
(function() {
  // Doing stuff here
})()

// But now, we can use just '{}' for doing that!
var a = 1;

{
  let a = 2;
  console.log(a) // 2
}

console.log(a) // 1

// Anyway, if we would need an async/await block scope, we would still use an IIFE:
(async function(){ await ... })()

// Another cool stuff which I would like to share is let keyword inside a block scope.
// Let's assume we have a block scope with a var and let declared variables:
{
  console.log(a); // 1
  console.log(b); // ReferenceError: b is not defined
  var a = 1;
  let b = 2;
}

/* This example shows that accessing let-declared variable earlier than its declaration causes an error,
whereas var-declared orderind doesn't matter!