Disable Dates

Firstly, thanks for the plugin!

I am having an issue with disabling specific dates from an array like I have done in the past on other non-wp sites.

The below code is not working. What can I do to make this work with the WP Datepicker plugin?

<script>
var array = [“11-10-2018”];
jQuery(‘#datepicker’).datepicker({

beforeShowDay: function (date) {
var string = jQuery.datepicker.formatDate(‘mm-dd-yy’, date);
return [array.indexOf(string) == -1]
}

});

</script>