Shopify

<script src="https://cdn.linkrunner.io/web/v1/lr.js" data-token="YOUR_WEB_SDK_TOKEN" defer></script>

<script>
    document.addEventListener("DOMContentLoaded", function () {
        var vid = localStorage.getItem("lr_vid");
        if (!vid) return;
        fetch("/cart/update.js", {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ attributes: { lr_vid: vid } }),
        }).catch(function () {});
    });
</script>

{% if customer %}
<script>
    document.addEventListener("DOMContentLoaded", function () {
        var id = String({{ customer.id }});
        if (localStorage.getItem("lr_signup") === id) return;
        lr.identify(id);
        lr.track("signup", {
            name: {{ customer.name | json }},
            email: {{ customer.email | json }},
            phone: {{ customer.phone | json }}
        });
        localStorage.setItem("lr_signup", id);
    });
</script>
{% endif %}

var LR_TOKEN = "YOUR_WEB_SDK_TOKEN";
var DEFAULT_ENDPOINT = "https://api.linkrunner.io/web/ingest";
var LAST_TOUCH_MS = 24 * 60 * 60 * 1000;
var UTM_KEYS = ["utm_source", "utm_medium", "utm_campaign", "utm_id", "utm_term", "utm_content"];

async function context() {
    try { return JSON.parse(await browser.localStorage.getItem("lr_ctx")) || {}; } catch (e) { return {}; }
}

async function send(endpoint, payload) {
    var res = await fetch(endpoint, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(payload),
        keepalive: true,
    });
    if (!res.ok) throw new Error("status " + res.status);
}

analytics.subscribe("checkout_completed", async (event) => {
    try {
        var checkout = event.data.checkout || {};
        var ctx = await context();
        var fields = Object.assign({}, ctx.fields);

        if (!ctx.t || Date.now() - ctx.t > LAST_TOUCH_MS) {
            UTM_KEYS.forEach(function (k) { delete fields[k]; });
        }

        var payload = Object.assign(fields, {
            token: LR_TOKEN,
            event_id: "lr-" + Date.now().toString(36) + "-" + Math.random().toString(36).slice(2, 10),
            event_type: "custom",
            event_name: "purchase",
            event_data: {
                value: Number(checkout.totalPrice && checkout.totalPrice.amount) || 0,
                currency: checkout.currencyCode || "",
                order_id: (checkout.order && checkout.order.id) || "",
                email: checkout.email || "",
                phone: checkout.phone || "",
            },
            page_url: event.context.document.location.href,
            client_timestamp: new Date().toISOString(),
        });

        if (!payload.visitor_id) {
            (checkout.attributes || []).forEach(function (a) {
                if (a.key === "lr_vid") payload.visitor_id = a.value || "";
            });
        }

        var endpoint = ctx.endpoint || DEFAULT_ENDPOINT;
        await send(endpoint, payload).catch(function () {
            if (endpoint !== DEFAULT_ENDPOINT) return send(DEFAULT_ENDPOINT, payload);
        });
    } catch (e) {}
});

lr.yourstore.com.  CNAME  api.linkrunner.io.

<script src="https://cdn.linkrunner.io/web/v1/lr.js" data-token="YOUR_WEB_SDK_TOKEN" data-domain="lr.yourstore.com" defer></script>