JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.rawgit.com/moment/moment/2.8.3/moment.js"></script>
<script src="https://cdn.rawgit.com/timrwood/fcd0925bb779f4374a7c/raw/f57ebe13d3b8824dec7fb02e00d2a6467b7ee77e/moment-immutable.js"></script>

JavaScript

var a = moment();
var b = a.add(1, 'year');
var c = b.add(1, 'year');
console.log( c.isAfter(a))

document.body.innerHTML = '<pre>' + [
    
    a.format(),
    b.format(),
    c.format()
    
].join('\n') + '</pre>';