JSFiddle - React, Tailwind, and code Playground
by Ankit G.
JavaScript
var d1 = "2015-04-30";
var d2 = "2015-04-14";
var startDay = new Date(d1);
var endDay = new Date(d2);
var millisecondsPerDay = 1000 * 60 * 60 * 24;
var millisBetween = startDay.getTime() - endDay.getTime();
var days = millisBetween / millisecondsPerDay;
alert(days)