JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

<p>Start Date: <input type="text" id="sdatepicker"></p>
<p>End Date: <input type="text" id="edatepicker"></p>

JavaScript

var interval = 7;
    $(function() {
      $("#sdatepicker").datepicker({
        minDate: 0,
        maxDate: interval
      });

      $("#edatepicker").datepicker({
        minDate: 0
      });

      var today = new Date();
      var target = new Date(today.getFullYear(), today.getMonth(), today.getDate() + interval);
      $("#sdatepicker").datepicker("setDate", today);
      $("#edatepicker").datepicker("setDate", target);

      $("#sdatepicker").datepicker({
        changeMonth: true,
        changeYear: true,
        showOn: 'button',
        buttonImage: '../../../images/calendar.png',
        buttonImageOnly: true,
        title: 'Click to open calendar',
        alt: 'Click to open calendar'
      }).on("change", function() {
        var start = $("#sdatepicker").datepicker("getDate");
        start.setDate(start.getDate() + interval);
        $("#edatepicker").datepicker("setDate", start);
        $("#edatepicker").datepicker("option", "minDate",
          $("#sdatepicker").datepicker("getDate"));
      });

      $("#edatepicker").datepicker({
        changeMonth: true,
        changeYear: true,
        showOn: 'button',
        buttonImage: '../../../images/calendar.png',
        buttonImageOnly: true,
        title: 'Click to open calendar',
        alt: 'Click to open calendar'
      }).on("change", function() {
        var start = $("#sdatepicker").datepicker("getDate");
        $("#sdatepicker").datepicker("setDate", start);
        $("#sdatepicker").datepicker("option", "maxDate",
          $("#edatepicker").datepicker("getDate"));
      });
    });