Is 'let' supported?

A test to see if the browsers supports the 'let' keyword, and shows that it has block level scoping.

HTML

<p>Open the Console in your browser. The value posted to the console should initially be "Foo". The second time we print to the console, <var>blockScope</var> should be out of scope, as <code>let</code> has block level scoping.</p>

JavaScript

"use strict";

function letTest() {
  let x = 2;
  
  function test2(){
  	console.log(x);  // 2
  }
  
  test2();
}

letTest();