laravel post upload file using ajax

$('form').submit(function(e) {
    e.preventDefault();
    var formData = new FormData($(this)[0]); // array[0] !important
    $.ajax({
        url: '{{ url('/url') }}',
        type: 'POST',              
        data: formData,
        success: function(result)
        {
            // result
        },
        error: function(data)
        {
            console.log("Error : " + data);
        }
    });

});