"swal is not defined" after migrating from Sweet Alert 1

I was previously using the original Sweet Alert, and things were working fine. Upgraded to SA2 and followed the migration guide. My code:

import swal from "sweetalert2"

swal({
    title: "Are you sure?",
    text: "This cannot be undone.",
    type: "warning",
    showCancelButton: true,
    confirmButtonColor: "#DD6B55",
    confirmButtonText: "Yes.",
    closeOnConfirm: false,
    showLoaderOnConfirm: true
}).then(function() {
    /* do stuff */
})

This results in swal is not defined.

Webpack doesn’t report an error, so it’s not a compilation issue. Do I have to do something else to make this work? Other than switching from callbacks to promises as per the migration guide, nothing else has changed in my code. Using Chrome.

[limonte]

[webhacking]

import swal from 'sweetalert2';

window.swal = swal