JSFiddle - React, Tailwind, and code Playground

JavaScript

var start = new Date("2014-02-18");
var end = new Date();
var diff = new Date(end - start);
var days = diff/1000/60/60/24
//alert(days);
if(days<=1){
    alert("less then 1 day");
}
else{
    alert("more then 1 day");
}