← Revenue attribution guide

Attribute revenue with Polar (other methods)

Use the JavaScript snippet below to track revenue after successful payment by passing the customer's email:

// Track revenue after successful payment using email
window.datafast("payment", { email: "customer@example.com" });

Example implementation

Let's say your customers are redirected to a /welcome page after completing a checkout. You want to fire the DataFast payment event on this page. Using React, you can do this like this:

"use client"

import { useEffect } from 'react';

export default function Dashboard({ user }) {

  useEffect(() => {
    window.datafast("payment", { email: user.email });
  }, [user]);

  return (
    <div>
      <h1>Welcome to the app!</h1>
    </div>
  );
}

When to use this method

• Third-party payment processors that use Polar
• Mobile app payments

Important notes

• Duplicate payment events are ignored so you don't need to worry about sending multiple events for the same payment
• Works with any payment flow as long as you have the customer's email