abTestOrderForm.js

window.addEventListener("load", () => {

    // Cookie name to check if the user is part of the test
    const TEST_COOKIE = "deco_matcher_2187709"

    async function onLoadMarketing() {
        const orderForm = await vtexjs.checkout.getOrderForm();

        function getCookie(name) {
            const cookies = document.cookie.split(";");

            for (let cookie of cookies) {
                cookie = cookie.trim();
                if (cookie.startsWith(name + "=")) {
                    return cookie.substring(name.length + 1);
                }
            }

            return null;
        }

        const testCookie = getCookie(TEST_COOKIE);

        // Feel free to add this info in other fields
        // of the marketingData object
        const marketingData = orderForm.marketingData
            ? {
                ...orderForm.marketingData,
                "utmiPart": testCookie?.endsWith("0") ? "deco" : "vtex",
            }
            : {
                "utmiPart": testCookie?.endsWith("0") ? "deco" : "vtex",
            };

        await vtexjs.checkout.sendAttachment(
            "marketingData",
            marketingData,
        );
    }

    onLoadMarketing();
});