JSFiddle - React, Tailwind, and code Playground

HTML

Cookies: <span id="cookies"></span>
<button onclick="cookieClick(1)">+</button>

JavaScript

var cookies = 0;
var rand = Math.floor(Math.random() * (3 - 1 + 1)) + 1;
if(localStorage.cookies) cookies = localStorage.getItem('cookies');
document.getElementById("cookies").innerHTML = cookies;
function cookieClick(number){
    cookies = parseInt(cookies) + rand;
    document.getElementById("cookies").innerHTML = cookies;
    localStorage.setItem('cookies', cookies);
}