JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="start-date-picker" />
<input type="text" id="end-date-picker" />

JavaScript

$('#start-date-picker').datepicker();
$('#end-date-picker').datepicker();


$('#start-date-picker').change(function(){
	var interval = 10;
  
  function convertDateString(p) { return (p < 10) ? '0' + p : p; }
  
  var startDate = new Date($(this).val());
  startDate.setDate(startDate.getDate() + interval);
	$('#end-date-picker').val(convertDateString(startDate.getMonth() + 1) + '/' + convertDateString(startDate.getDate()) + '/' + startDate.getFullYear());
});