Custom attributes for Forms

Is there a way to use the Webflow forms with custom attributes? Specifically:

Form ID
Form Onsubmit
Field ID
Field Name

When I try to set them up in the custom attributes it gives me this error:

This is a reserved name.

Or is there a way to use the css styling from the form with the embed element? When I add the CSS it just considers it text.

Yes, attr is what you are looking for. .attr() | jQuery API Documentation