doAsyncOnSubmit

fn.js

function doAsyncOnSubmit(form, asyncFn) {
  const onSubmitFunction = async function(e) {
    e.preventDefault()

    form.off('submit', onSubmitFunction)

    const doSubmit = await asyncFn()

    if (doSubmit) {
      form.submit()
    }
  }

  form.on('submit', onSubmitFunction)
}