website/_includes/cookie-consent.html

<style>
    #cookie-notice {padding: 0.5rem 1rem; display: none; text-align: center; position: fixed; bottom: 0; width: calc(100% - 2rem); background: #222; color: rgba(255,255,255,0.8);}
    #cookie-notice a {display: inline-block; cursor: pointer; margin-left: 0.5rem;}
    @media (max-width: 767px) {
        #cookie-notice span {display: block; padding-top: 3px; margin-bottom: 1rem;}
        #cookie-notice a {position: relative; bottom: 4px;}
    }
</style>
<div id="cookie-notice"><span>Utilizziamo Matomo (una tecnologia libera) per analizzare e migliorare il servizio che offriamo.</span><a id="cookie-notice-accept" class="btn btn-primary btn-sm text-white">Approva</a><a href="https://matomo.org/gdpr/" rel="nofollow" target="_blank" class="btn btn-primary btn-sm text-white">Scopri di più</a><a id="cookie-notice-dismiss" class="mt-1 float-right text-decoration-none border border-secondary rounded btn btn-sm btn-secondary text-white">X</a></div>
<script>
    function createCookie(name,value,days) {
        var expires = "";
        if (days) {
            var date = new Date();
            date.setTime(date.getTime() + (days*24*60*60*1000));
            expires = "; expires=" + date.toUTCString();
        }
        document.cookie = name + "=" + value + expires + "; path=/";
    }
    function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    }
    function eraseCookie(name) {
        createCookie(name,"",-1);
    }

    if(readCookie('cookie-notice-dismissed')=='true') {
        console.log("GDPR Consent Missing");
    } else {
        document.getElementById('cookie-notice').style.display = 'block';
    }

    document.getElementById('cookie-notice-accept').addEventListener("click",function() {
        createCookie('cookie-notice-dismissed','true',31);
        _paq.push(['rememberConsentGiven']);
        document.getElementById('cookie-notice').style.display = 'none';
        location.reload();
    });

    document.getElementById('cookie-notice-dismiss').addEventListener("click",function() {
        createCookie('cookie-notice-dismissed','true',31);
        _paq.push(['forgetConsentGiven']);
        _paq.push(['optUserOut']);
        document.getElementById('cookie-notice').style.display = 'none';
        location.reload();
    });

</script>