console.log('Initializing google analytics advanced e-commerce');
		console.log('Site key is GTM-K4D3F9X');
		console.log('Locale is en-US');
	
console.log('Setting up data layer');
window.dataLayer = window.dataLayer || [];

console.log('Add event specific datalayer options for default');

		console.log('Adding default information.');
		window.dataLayer.push({
		  'locale': 'en-US'
		});
	
console.log('Completed data layer');

function onAddedToCart(currencyCode, productArray) {
  var newProductArray = [];
  for (product in productArray) {
  	if (productArray[product].coupon == 'undefined') {
  		productArray[product].coupon = undefined;
  	}
  }
  dataLayer.push({
    'event': 'Product Added',
    'ecommerce': {
      'currencyCode': currencyCode, // %%localeCurrency%%
      'add': {
        'products': productArray
      }
    }
  });
}

function onAddedCouponAccepted(couponCode) {
	onAddedCouponEvent(couponCode, 'Coupon Accepted');
}
function onAddedCouponRejected(couponCode) {
	onAddedCouponEvent(couponCode, 'Coupon Rejected');
}
function onAddedCouponEvent(couponCode, event) {
	console.log('Coupon ' + couponCode + ' event: ' + event);
	window.dataLayer.push({
  		'locale': 'en-US',
		'event': event,
  		'couponCode':  couponCode
    });
}
function onRemovedFromCart(currencyCode, productArray) {
	console.log("removing items from cart");
	window.dataLayer.push({
		'locale': 'en-US', // %%siteLocale%%
  		'event': 'Product Removed',
  		'ecommerce': {
    		'currencyCode': currencyCode, // %%localeCurrency%%
    		'remove': {
      			'products': productArray
			}
  		}
	});
}
function checkoutOption(step, checkoutOption) {
  dataLayer.push({
    'event': 'Checkout Option Selected',
    'ecommerce': {
      'checkout_option': {
        'actionField': {'step': step, 'option': checkoutOption}
      }
    }
  });
}
<!-- Google Tag Manager -->
console.log('Sending information to GA');
(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-K4D3F9X');