looping through querySelectorAll elements

querySelectorAll-loop.js

var elem = document.querySelectorAll(element)

// IE8+
if (elem.length) {
  for (var i = 0;  i < elem.length; i++) {
    elem[i] // iterate over this
  }
}

// IE9+
if (elem.length) {
  [].forEach.call(elem, function(e) {
    e // iterate over this
  })
}