JSFiddle - React, Tailwind, and code Playground

JavaScript

(function($){
        $.fn.getDatepickerInstance = function() {
            var el = $(this);
            if(!$(el).is('.hasDatepicker')) {
                throw 'getDatepickerInstance() called on non-datepicker object. Must first be initiailized.';
            }
            for(obj in window) {
                if(obj.match(/^DP_jQuery_/) 
                    && window[obj]
                    && typeof window[obj].datepicker !== 'undefined'
                    && window[obj].datepicker._curInst.id == $(el).attr('id')) {
                    return window[obj].datepicker._curInst;
                }
            }
        };
    })(jQuery);