General Assumptions: Bulk Edit fields are submitted via Ajax
Findings: It is not — Quick Edit (aka Inline Edit) for individual posts is submitted via Ajax. No additional JS work needs to be done to submit Quick Edit field values.
However, when Quick Edit fields are updated, JS is needed to update the fields after updating the post because WordPress doesn't refresh the quick edit fields when the post has been updated.
Differences: Bulk Edit vs Quick Edit
Bulk Edit data is submitted via a GET request while Quick Edit data is submitted via a POST request.
The GET request for Bulk Edit data is generally arranged as: