ES6SeriesPart1_let2.js

// with var. See example live: https://jsfiddle.net/maasha/gsewf5av/
for(var i= 0; i<30; i++){
  var div = document.createElement('div');
  div.onclick = function() {
    alert("you clicked on a box " + i);
   };
   document.getElementsByTagName('section')[0].appendChild(div);
}

// with let. See example live: https://jsfiddle.net/maasha/xwrq8d5j/
for(let i=0; i<30; i++) {
  var div=document.createElement(‘div’);
  div.onclick = function() {
    alert("you clicked on a box " + i);
   };
   document.getElementsByTagName('section')[0].appendChild(div);
}