Custom Event Code Generator

You can find this by first creating a custom event. Set "Custom javascript" as the event type and find the code inside the "Name" property in the example HubSpot gives you.

Matches any URL that contains the values below. Doesn't require exact match.

Use the internal names. Include both custom and default properties.

You can find this by inspecting the form on a webpage and looking at the <form> element. The id is in data-form-id.