JSFiddle - React, Tailwind, and code Playground
by Laurie
HTML
<div id="daysOpen"></div>
JavaScript
var start = new Date("2015-05-01");
var end = new Date();
var diff = new Date(end - start);
var daysOpen = diff/1000/60/60/24;
alert(daysOpen);
$("#daysOpen").append(daysOpen);