Sweealert2 : Unknown parameter icon

The new major version (v9) was released a couple of days ago, please update your sweetalert2 dependency:

package.json:

"sweetalert2": "^9.0.0",

Or, if you're using CDN:

<script src="https://cdn.jsdelivr.net/npm/sweetalert2@9"></script>

Read the release notes to see all breaking changes: https://github.com/sweetalert2/sweetalert2/releases/tag/v9.0.0

try switch "icon", for "type", like this:

               Swal.fire({
                    type: 'info',
                    title: hasil.message,
                    showConfirmButton: false,
                    timer: 1500
                });

I just had the same problem and found this solution!