如何在日期选择器实体中添加事件日期？

Question

I'm trying to add event's date in the calendar of the day picker using the method that Materialize suggest but isn't working for me or maybe I'm doing something wrong.

Materialize Date Picker

var elems = document.querySelector('.datepicker')
var instances = M.Datepicker.init(elems, {
      events: [new Date('2018,12,12').toLocaleDateString()]
    }

---

EDIT-

Solution to my Problem-

Down below is the code of my final working result, by the way I used this date format ('2018,12,12') because it is easier for me to figure that 12 is equals to december rather than 11 in this date format (2018,11,25) .

I have also added other parameters which are working perfectly.

I appreciate your help, Thanks Germa V.

document.addEventListener('DOMContentLoaded', function() {

    let eventsDates = [
        new Date('2018,12,1').toDateString(),
        new Date('2018,12,2').toDateString()
    ];
    let disableListDate = [
        new Date('2018,12,3').toDateString(),
        new Date('2018,12,4').toDateString()
    ];

    let optionsDate = {
        defaultDate: defaultDate,
        setDefaultDate: true,
        firstDay: 1,
        events: eventsDates,
        disableWeekends: false,
        autoClose: false,
        showDaysInNextAndPreviousMonths: false,
        showClearBtn: true,
        i18n:{
            months: 
            ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agost', 'Sept', 'Oct', 'Noviem..', 'Diciemb..'],
            monthsShort: ['Ene', 'Feb', 'Mar', 'Abril', 'Mayo', 'Jun', 'Jul', 'Agos', 'Sep', 'Oct', 'Nov', 'Dic'],
            weekdays: ['Dom','Lun', 'Mar', 'Mie', 'Jue', 'Vie', 'Sab']
        },
        format: 'dd-mmm-yyyy',
        onSelect() {
            if (optionsDate.events.includes(this.date.toDateString())) {
                alert('Event Date');
            }
        },

        disableDayFn(date) {
            if(disableListDate.includes(date.toDateString()))
                return true
            else
                return false
        },

        parse(){

        }
    }

    let elems = document.querySelector('.datepicker');
    let instances = M.Datepicker.init(elems, optionsDate);
});

Answer 1

That's not how you set a date in Date() , if you want to know how to set date in Datepicker function then you can check this answer --> How to set date in Materialize Datepicker

var optionsDate = {
    events: [new Date(2018, 11, 20).toDateString(),
    new Date(2018, 11, 21).toDateString()],
    onSelect() {
        if (optionsDate.events.includes(this.date.toDateString())) {
            console.log('Event Date');
        }
    }
}
var elemsDate = document.querySelector(".datepicker");
var instanceDate = M.Datepicker.init(elemsDate, optionsDate);