javascript cookie manager class

cookie_manager.js

var CookieManager = (function(){
  class Cookies {
    constructor(){
      this.getCookies();
    }
    getCookies() {
        this.cookies = document.cookie
        .split(";")
        .reduce(function(cookies, cookie) {
            var label, value, o = {}, pair = cookie.split("=");
            label = pair[0].trim();
            value = pair[1].trim();
            o[label] = value;
            cookies = Object.assign(cookies, o);
            return cookies;
        },{});
        return this.cookies;
    }
    getCookie(label) {
        this.getCookies();
        return this.cookies[label];
    }
    setCookie(label, value, expires_seconds, path) {
      var utcdate, date = new Date(), cookie_str;
	    
      /* path defaults to / */  
      path = path || "/"; 

      /* expires defaults to 14 days */
      expires_seconds = expires_seconds || (60*60*24*14); 
      expires_seconds *= 1000;
      date.setTime(date.getTime()+expires_seconds);
      document.cookie = encodeURIComponent(label) + '=' + encodeURIComponent(value) + '; expires=' + date.toUTCString() + '; path=' + path;
      return this.getCookies();
    }
  }
  return new Cookies();
})();