pickadate set disabled days using a variable

I want to set the disabled days dynamically, depending on what was selected from a select-input. My option has the following data field:

data-disableddays="2,3,4,5"

I have an onchange event on my select. there I am getting the value of the data-disableddays:

var disableddays = $(this).find(':selected').data('disableddays');

The console.log output is correct (2,3,4,5)

When I am initializing the pickadate:

var picker = $('#tripstart').pickadate({
                        format: 'd.mm.yyyy',
                        min: new Date($mystart),
                        max: new Date($myend),
                        firstDay: 1,
                        disable: [
                          disableddays
                        ]
                      });

Nothing is happening. Replacing the variable disableddays with "2,3,4,5" everything is working well. What do I have to do to make this variable working at this place?

Try doing this

var disableddays = $(this).find(':selected').data('disableddays');
disableddays = disableddays.split(',').map(day=>parseInt(day));
var picker = $('#tripstart').pickadate({
                        format: 'd.mm.yyyy',
                        min: new Date($mystart),
                        max: new Date($myend),
                        firstDay: 1,
                        disable: disableddays
                      });

Basically, disabledays should be an array of integers.