JSFiddle - React, Tailwind, and code Playground
by Roland Doda
HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>
JavaScript
let start_date = '2018-02-01'
let end_date = '2018-02-02'
const days_long = moment(end_date).diff(moment(start_date), 'days')
end_date = moment(end_date).add(days_long, 'days').format('YYYY-MM-DD')
console.log(end_date)