Iframe tracking demo
Send iframe form data to the parent page dataLayer
This example embeds a form as an iframe. The iframe hashes the email address, posts a message to the parent page, and the parent page pushes the sanitized event into `window.dataLayer`.
Embedded iframe
Submit the form below. The iframe sends a `postMessage` payload to this page, and this page pushes `iframe_form_submit` to `window.dataLayer`.