JSFiddle - React, Tailwind, and code Playground

HTML

Check In
<input type="date" id="checkIn" onchange="updatedate();" name="checkin">

Check out
<input type="date" id="checkOut" min="" name="checkout">

JavaScript

function updatedate() {
  var checkinDate = new Date(document.getElementById("checkIn").value);
  var checkoutDate = new Date(checkinDate);
  checkoutDate.setDate(checkinDate.getDate() + 1);
  
  var checkoutDateFormat = checkoutDate.toISOString().split('T')[0];
  
  document.getElementById("checkOut").value = "";
  document.getElementById("checkOut").setAttribute("min", checkoutDateFormat);
}