https://www.kolo.pl/js/cookie.js

1
2(function () {
3    "use strict";
4
5    var cookieAlert = document.querySelector(".cookiealert");
6    var acceptCookies = document.querySelector(".acceptcookies");
7
8    if (!cookieAlert) {
9       return;
10    }
11
12    cookieAlert.offsetHeight; // Force browser to trigger reflow (https://stackoverflow.com/a/39451131)
13
14    // Show the alert if we cant find the "acceptCookies" cookie
15    if (!getCookie("acceptCookies")) {
16        cookieAlert.classList.add("show");
17    }
18
19    // When clicking on the agree button, create a 1 year
20    // cookie to remember user's choice and close the banner
21    acceptCookies.addEventListener("click", function () {
22        setCookie("acceptCookies", true, 365);
23        cookieAlert.classList.remove("show");
24
25        // dispatch the accept event
26        window.dispatchEvent(new Event("cookieAlertAccept"))
27    });
28
29    // Cookie functions from w3schools
30    function setCookie(cname, cvalue, exdays) {
31        var d = new Date();
32        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
33        var expires = "expires=" + d.toUTCString();
34        document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
35    }
36
37    function getCookie(cname) {
38        var name = cname + "=";
39        var decodedCookie = decodeURIComponent(document.cookie);
40        var ca = decodedCookie.split(';');
41        for (var i = 0; i < ca.length; i++) {
42            var c = ca[i];
43            while (c.charAt(0) === ' ') {
44                c = c.substring(1);
45            }
46            if (c.indexOf(name) === 0) {
47                return c.substring(name.length, c.length);
48            }
49        }
50        return "";
51    }
52})();