JSFiddle - React, Tailwind, and code Playground

by salman

HTML

<div id="datepicker"></div>

JavaScript

$(function () {
    $("#datepicker").datepicker({
        beforeShowDay: function (date) {
            var lastDayInMonth = new Date(date.getFullYear(), date.getMonth() + 1, 0).getDate();
            var isSunday = date.getDay() == 0;
            var isFirstDayOfMonth = date.getDate() <= 7;
            var isLastDayOfMonth = date.getDate() > lastDayInMonth - 7;
            return [isSunday && (isFirstDayOfMonth || isLastDayOfMonth), ""];
        }
    });
});