Angular 4 error in IE11 : <p>I have Angular 4 project that works successfully on Chrome.
However it doesn't load on IE11 with the following error in polyfills.bundle.js(I use command "ng build --env=prod" to build site):</p>

<pre><code>var exports = module.exports = function (iterable, entries, fn, that, ITERATOR) {
  var iterFn = ITERATOR ? function () { return iterable; } : getIterFn(iterable);
  var f = ctx(fn, that, entries ? 2 : 1);
  var index = 0;
  var length, step, iterator, result;
  if (typeof iterFn != 'function') throw TypeError(iterable + ' is not iterable!');
</code></pre>

<p>iterFn is undefined here so error is thrown. 
Please advise.</p>
