data-decorate-callback

<!-- Configure an add button to add an item to the cart. -->

<button data-fsc-item-path-value="phot-io-main-app" data-fsc-action="Add, Checkout">Add to Cart</button>

​

​

<!--

    DEMO SETUP

        - Initialize the Store Builder Library

-->

<script

    id="fsc-api"

    src="https://sbl.onfastspring.com/sbl/1.0.2/fastspring-builder.min.js"

    type="text/javascript"

    data-storefront="fastspringexamples.test.onfastspring.com/popup-fastspringexamples"

    data-decorate-callback="decorateURL">

</script>

​

<!-- Global site tag (gtag.js) - Google Analytics -->

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-57518103-7"></script>

<script>

  window.dataLayer = window.dataLayer || [];

  function gtag(){dataLayer.push(arguments);}

  gtag('js', new Date());

  gtag('config', 'UA-57518103-7');

</script>

​

<!-- Decorate callback function -->

<script>

    function decorateURL(url) {

        alert("decorate callback");

        var linkerParam = null;

        ga(function() {

            var trackers = ga.getAll();

            linkerParam = trackers[0].get('linkerParam');

        });

        return (linkerParam ? url + '?' + linkerParam : url);

    }

</script>