With Vim keybinding extensions, there is a command :q! that is a force quit.

When you execute this command it quits, without prompting, and without storing any changes. This is what differentiates it from hotexit, all changes should be reverted.

All prompts should be suppressed and the editor should be closed right away.

Currently there is nothing in the API to allow us to do this

:q! to quit without saving (short for :quit!)

Over at VSCodeVim this is one of our highest rated issues:
VSCodeVim/Vim#979