https://berkshiremainstreet.com/cookie-banner/cookie-banner.js

1var jonahCookieBanner = {
2  cookieName: 'jcmAcceptedCookies',
3
4  getCookie: function(cname) {
5    var name = cname + "=";
6    var ca = document.cookie.split(';');
7    for(var i = 0; i < ca.length; i++) {
8      var c = ca[i];
9      while (c.charAt(0) == ' ') {
10        c = c.substring(1);
11      }
12      if (c.indexOf(name) == 0) {
13        return c.substring(name.length, c.length);
14      }
15    }
16    return null;
17  },
18
19  init: function() {
20    var cookieBanner = document.getElementById('jonah-cookie-banner');
21    var cookieButtons = document.querySelectorAll('[data-cookie-action]');
22    var cookieDecision = this.getCookie(this.cookieName);
23
24    // -- Allows reset of the cookieDecision, forcing banner to show.
25    if (cookieBanner.getAttribute('data-cookie-reset') == 1) {
26      cookieDecision = null;
27    }
28
29    // -- Ensure a decision has not been made, and the Cookie Banner is present in the DOM.
30    if (cookieDecision == null && cookieBanner) {
31
32      // -- Open banner from selected position.
33      switch (cookieBanner.dataset.position) {
34        case 'bottom':
35          cookieBanner.style.bottom = (cookieBanner.offsetHeight * -1) + 'px';
36
37          setTimeout(function(){
38            cookieBanner.classList.add('cookie-banner--show-from-bottom');
39          }, 500);
40          break;
41        case 'top':
42          cookieBanner.style.top = (cookieBanner.offsetHeight * -1) + 'px';
43
44          setTimeout(function(){
45            cookieBanner.classList.add('cookie-banner--show-from-top');
46          }, 500);
47          break;
48      }
49
50      if (cookieButtons.length) {
51        for (var i = 0; i < cookieButtons.length; i++) {
52          var el = cookieButtons[i];
53
54          el.cookieBehavior = el.dataset.cookieAction;
55          el.removeAttribute('data-cookie-action');
56
57          el.onclick = function(e) {
58            e.preventDefault();
59
60            switch (this.cookieBehavior) {
61              case 'acceptance':
62                // -- Create Date object set to 12 months out.
63                var expire = new Date();
64                expire.setFullYear(expire.getFullYear() + 1);
65
66                // -- Store acceptance decision as a cookie for 12 months.
67                document.cookie = jonahCookieBanner.cookieName + "=1;path=/; expires=" + expire.toGMTString() + '; SameSite=Strict; Secure';
68                break;
69            }
70
71            // -- Remove Visibility Classes
72            cookieBanner.classList.remove('cookie-banner--show-from-bottom');
73            cookieBanner.classList.remove('cookie-banner--show-from-top');
74
75            // -- Remove Cookie Manager from DOM.
76            setTimeout(function(){
77              cookieBanner.remove();
78            }, 500);
79          };
80        }
81      }
82    } else {
83      // -- Decision has already been made. Remove Cookie Manager from DOM.
84      cookieBanner.remove();
85    }
86  }
87};
88
89jonahCookieBanner.init();