Popupe.vim provides some functions that creates editable popups by hacking Vim's terminal popup window. This is really hacky so it can be broken by future change of Vim. Please use this at your own risk.

For further information, see the doc.

vim9script

import autoload 'popupe.vim'

popupe.PopupInput((result: string) => {
  if result is null_string
    echo 'Cancelled'
  else
    echo result
  endif
})