itskp-odense/Frontend/Assets/Ajax/deletePost.js

function deletePost(id) {
    return $.ajax({
        type: 'POST',
        url: '../Backend/controller/deletePost.php',
        data: {'delete_id':id},
        success:function (data) {
            Swal.fire(
                'Posten er slettet!',
                '',
                'success'
            )
        },
        error:function (data) {
            Swal.fire(
                'Posten kunne ikke blive slettet',
                '',
                'error'
            )
        }
    });
}