Get HTTP Body of Form in JavaScript

Question

Is it possible in Javascript to get the contents of the HTTP Body of the resulting HTTP request that would be sent when a Form is submitted?

Say I have a Form of type 'POST' with a file input and some other input fields and an enctype attribute of 'multipart/form-data'. I would like to get the verbatim HTTP Body and possibly HTTP Headers of the request the browser would generate if I submitted the form (without actually submitting it).

Answer 1

No. There are no APIs that expose that information.

You can attempt to manually construct the request, but there's no way to get the browser to prepare it for you.