[рони]

lukasss,

var date = new Date(new Date().getTime() + 5 * 60 * 1000);
document.cookie = "bb-2017=value; path=/; expires=" + date.toUTCString();
alert(document.cookie);
function deleteCookie(name) {
document.cookie.split(";").forEach(function(el) {
         el = el.split("=")[0].trim();
         if(!el.indexOf(name)) {
         var date = new Date(0);
document.cookie = el + "=; path=/; expires=" + date.toUTCString();
         }
  });

}

deleteCookie("bb") ;  alert(document.cookie);