JSFiddle - React, Tailwind, and code Playground

JavaScript

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

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