Client-side conversion tracking

@dub/analytics is a client-side script for tracking conversion events with Dub. By default, the script handles the detection of the dub_id query parameter and storing it as a first-party cookie:

A diagram showing how click events are tracked in the conversion funnel

Then, when a conversion event occurs (e.g. a user signs up for an account), you can check for the dub_id cookie and attribute the conversion to the original click by tracking a lead event.

A diagram showing how lead events are tracked in the conversion funnel

Finally, when the user completes a purchase (e.g. subscribing to a plan, purchasing a product, etc.), you can track a sale event. Under the hood, Dub will automatically attribute the sale to the original link click.

A diagram showing how sale events are tracked in the conversion funnel

Quickstart

Generate your publishable key

Before you can track conversions on the client-side, you need to generate a publishable key from your Dub workspace.To do that, navigate to your workspace’s Analytics settings page and generate a new publishable key under the Publishable Key section.

Enabling conversion tracking for a workspace

Allowlist your site's domain

Then, you’ll need to allowlist your site’s domain to allow the client-side conversion events to be ingested by Dub.To do that, navigate to your workspace’s Analytics settings page and add your site’s domain to the Allowed Hostnames list.This provides an additional layer of security by ensuring only authorized domains can track conversions using your publishable key.

You can group your hostnames when adding them to the allow list:

example.com: Tracks traffic only from example.com.
*.example.com: Tracks traffic from all subdomains of example.com, but not from example.com itself.

When testing things out locally, you can add localhost to the Allowed Hostnames list temporarily. This will allow local events to be ingested by Dub. Don’t forget to remove it once you’re ready to go live!

Install @dub/analytics package

Next, install the Dub analytics script in your application.You can install the @dub/analytics script in several different ways:

React

Add Dub Analytics to your React app

Manual installation

Add Dub Analytics to your website

Google Tag Manager

Add Dub Analytics via GTM

Framer

Add Dub Analytics to your Framer site

Shopify

Add Dub Analytics to your Shopify store

WordPress

Add Dub Analytics to your WP site

Webflow

Add Dub Analytics to your Webflow site

You must configure the publishable key you generated in step 1 when installing the analytics script. Without this key, client-side conversion tracking will not work.

import { Analytics as DubAnalytics } from '@dub/analytics/react';

export default function RootLayout({
  children,
}) {
  return (
    <html lang="en">
      <body className={inter.className}>{children}</body>
      <DubAnalytics
        ...
        publishableKey="dub_pk_xxxxxxxx" // Replace with your publishable key
      />
    </html>
  );
}

<script>
  !(function (c, n) { 
    c[n] = c[n] || function () { (c[n].q = c[n].q || []).push(arguments); }; 
    ["trackClick","trackLead","trackSale"].forEach(t => c[n][t] = (...a) => c[n](t, ...a)); 
    var s=document.createElement("script"); s.defer=1; s.src="https://dubcdn.com/analytics/script.conversion-tracking.js"; 
    s.setAttribute("data-publishable-key","dub_pk_xxxxxxxx"); // Replace with your publishable key
    document.head.appendChild(s); 
  })(window, "dubAnalytics");
</script>

Client-side lead tracking

Once the analytics script is installed, you can start tracking lead events in your application on the client-side. Here are the quickstart examples for tracking lead events:

import { useAnalytics } from "@dub/analytics/react";
import { useState } from "react";

export function SignUpForm() {
  const { trackLead } = useAnalytics();
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();

    // Track the lead event
    trackLead({
      eventName: "Sign Up",
      customerExternalId: email,
      customerName: name,
      customerEmail: email,
    });
  };

  return (
    <form onSubmit={handleSubmit}>
      <input
        type="text"
        value={name}
        onChange={(e) => setName(e.target.value)}
        required
      />
      <input
        type="email"
        value={email}
        onChange={(e) => setEmail(e.target.value)}
        required
      />
      <button type="submit">Sign Up</button>
    </form>
  );
}

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Sign Up</title>
  </head>
  <body>
    <form id="signupForm">
      <input type="text" id="name" required />
      <input type="email" id="email" required />
      <button type="submit">Sign Up</button>
    </form>

    <script>
      document
        .getElementById("signupForm")
        .addEventListener("submit", function (e) {
          e.preventDefault();

          const name = document.getElementById("name").value;
          const email = document.getElementById("email").value;

          // Track the lead event
          dubAnalytics.trackLead({
            eventName: "Sign Up",
            customerExternalId: email,
            customerName: name,
            customerEmail: email,
          });
        });
    </script>
  </body>
</html>

Here’s the full list of attributes you can pass when sending a lead event:

Property	Required	Description
`clickId`	Yes	The unique `dub_id` parameter that the lead conversion event is attributed to.
`eventName`	Yes	The name of the event. Example: “Sign up”.
`customerExternalId`	Yes	The unique ID of the customer in your system. Will be used to identify and attribute all future events to this customer.
`customerEmail`	No	The email address of the customer. If not passed, a random email address will be generated.
`customerName`	No	The name of the customer. If not passed, a random name will be generated (e.g. “Big Red Caribou”).
`customerAvatar`	No	The avatar URL of the customer. If not passed, a random avatar URL will be generated.

When to track leads You should track lead events after successful user actions such as:

User registration or account creation
Newsletter subscription
Contact form submission
Demo request or trial signup
Download of gated content

Ensure the event is triggered only after the backend confirms the action was completed successfully. This guarantees accurate lead data and prevents false or incomplete entries.

Client-side sale tracking

Once the analytics script is installed, you can start tracking sale events in your application on the client-side.

import { useAnalytics } from "@dub/analytics/react";
import { useState } from "react";

export function CheckoutForm() {
  const { trackSale } = useAnalytics();
  // …
}
  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();

    // Track the sale event
    trackSale({
      eventName: "Purchase",
      customerExternalId: "cus_RBfbD57H",
      amount: 5000, // $50.00
      invoiceId: "in_1MtHbELkdIwH",
    });
  };

  return (
    <form onSubmit={handleSubmit}>
      ...
    </form>
  );
}

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Checkout</title>
  </head>
  <body>
    <form id="checkoutForm">
      ...
      <button type="submit">Checkout</button>
    </form>

    <script>
      document.getElementById("checkoutForm").addEventListener("submit", function (e) {
        e.preventDefault();

        // Track the sale event
        dubAnalytics.trackSale({
          eventName: "Purchase",
          customerExternalId: "cus_RBfbD57H",
          amount: 5000, // $50.00
          invoiceId: "in_1MtHbELkdIwH",
        });
      });
    </script>
  </body>
</html>

Here are the properties you can include when sending a sale event:

Property	Required	Description
`customerExternalId`	Yes	The unique ID of the customer in your system. Will be used to identify and attribute all future events to this customer.
`amount`	Yes	The amount of the sale in cents.
`paymentProcessor`	No	The payment processor that processed the sale (e.g. Stripe, Shopify). Defaults to “custom”.
`eventName`	No	The name of the event. Defaults to “Purchase”.
`invoiceId`	No	The invoice ID of the sale. Can be used as a idempotency key – only one sale event can be recorded for a given invoice ID.
`currency`	No	The currency of the sale. Defaults to “usd”.
`metadata`	No	An object containing additional information about the sale.

When to track sale Track sale events only after a user successfully completes a purchase or payment-related action, such as:

Completing a checkout or order
Subscription payment
Invoice payment
Any paid trial or demo conversion

Ensure the event is triggered only after the backend confirms the payment was successful. This guarantees accurate sale data and prevents false or incomplete entries.

Overview

SDKs

APIs

Client-side conversion tracking

Quickstart

React

Manual installation

Google Tag Manager

Framer

Shopify

WordPress

Webflow

Client-side lead tracking

Client-side sale tracking

​Quickstart

React

Manual installation

Google Tag Manager

Framer

Shopify

WordPress

Webflow

​Client-side lead tracking

​Client-side sale tracking

Quickstart

Client-side lead tracking

Client-side sale tracking