JSFiddle - React, Tailwind, and code Playground

HTML

<p>Start Date:
    <input type="text" id="startDatePicker" />
</p>
<p>End Date:
    <input type="text" id="endDatePicker" />
</p>

JavaScript

$("#startDatePicker").datepicker({ 
    dateFormat: 'yy-mm-dd',
    onSelect: function(datetText,dateObj){            
        var dateObject = $(this).datepicker("getDate");
        dateObject.setMonth(dateObj.currentMonth+3);
        $("#endDatePicker").datepicker( "option", "maxDate",dateObject);  
    }
});
$("#endDatePicker").datepicker({ 
    dateFormat: 'yy-mm-dd',
    changeMonth: true,
        onSelect: function(dateText,dateObj){
            var dateObject = $(this).datepicker("getDate");
            dateObject.setMonth(dateObj.currentMonth-3);
            $("#startDatePicker").datepicker( "option", "minDate",dateObject);
   } 
});