es2015.js

//Using let
//the let keyword scopes to the nearest block, not function
// it prevents variable declarations from being moved to the top of the scope.  This is called hoisting.
//  loadingMessage and flashMessage are trapped in their braces, and can't be accessed outside of them.

<script src="./load-profiles.js">
<script>
  loadProfiles(["Prince", "MJ", "James Brown"]);
</script>

function loadProfiles(names){
  if(names.length > 3){
    let loadningMessage = "This might take a while";
  } else {
    let flashMessage = "loading";
  }
}


// Using let in for loops
//using let instead of var will return the proper username, instead of the num it it in the iteration

function loadProfiles(names){
  for(let i in useNames){
    _fetchProfile("/users" + userNames[i], function() {
      console.log("Fetched for ", userNames[i]);
    });
  }
}

// Reassigning with Let
let name = "LaToya";
name = "Jayden";
console.log( name ); // returns Jayden 

//But be careful!

let name = "LaToya";
let name = "Jayden";
console.log( name ); //generates a type error

//Using const to clarify code
//Like let, const ivariables declared with const are scoped to the nearest block.
const MAX_USERS = 3;
const MAX_REPLIES = 3;