JSFiddle - React, Tailwind, and code Playground
JavaScript
var date1 = new Date("09/07/2013");
var date2 = new Date("09/15/2015");
var timeDiff = Math.abs(date2.getTime() - date1.getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
alert(diffDays);