The form.requestSubmit(submitter) function requests form submission. It includes interactive constraint validation, dispatches a 'submit' event, adds an entry for the specified submitter button, in addition to what submit() does.
https://github.com/whatwg/html/issues/4187 requestSubmit() exposes what click() implementation of built-in submit buttons do. It would be helpful to make developer's own submit buttons.
Status in Chromium
In development (tracking bug)
Consensus & Standardization
Last updated on 2019-05-20