shopify cart tracking

shopify2.js

<script type="text/javascript">

    var productsArray = [];

    {% for item in cart.items %}
        item = { 
            'sku': '{{ item.sku }}',
            'price': {{ item.price | money_without_currency }},
            'size': '{{ item.variant.option2 }}',
            'quantity': {{ item.quantity }}
        }
        productsArray.push( item );
    {% endfor %}

    var shpfy_track = {
        type: "bucket",
        products: productsArray
    }; 
</script>